ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical...

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ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital

Transcript of ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical...

Page 1: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO

ASK!

Dr. Pat Twomey,

Consultant Chemical Pathologist

The Ipswich Hospital

Page 2: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

CHEMICAL PATHOLOGIST• Clinical activity

– Currently

• Lipid/Cardiovascular Risk Clinic

• Nutrition

• Obesity

• Metabolic

– Previously

• Diabetes Clinics

• Endocrinology Clinics

Page 3: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

CHEMICAL PATHOLOGIST

• Laboratory Interpretation

– GMS2 and training changes increase this

• Laboratory Management

– Utilisation of laboratory tests

– Laboratory organisation

– Quality

• Research (if I am lucky)

Page 4: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

CHEMICAL PATHOLOGIST

• Trained in

– Cork

– Dublin

– Edinburgh

Page 5: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

THE STONE OF ELOQUENCE

• Blarney Castle is famous for its

stone, which is traditionally

believed to have the power to

bestow eloquence on all those

who kiss it.

Page 6: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

THE BRITISH ISLES

Page 7: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

THE BRITISH ISLES ADJUSTEDFOR I.Q.

Page 8: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

THE BRITISH ISLES ADJUSTEDFOR I.Q.

Page 9: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

1. Pharmaceutical Companies

DISCLOSURE1

• Shares – None

• Advisory Boards

– AstraZeneca

– Novartis

• Presentations

– Abbot

– AstraZeneca

– Bayer

– Fournier

– Glaxo Smith Kline

– Merck

– MSD

– Novartis

– Pfizer

– Roche

– Takeda

Page 10: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

THE STONE OF ELOQUENCE

• Blarney Castle is famous for its stone,

which is traditionally believed to have the

power to bestow eloquence on all those

who kiss it.

• Questions at anytime.

Page 11: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Lipids

• What are they?

• Name some lipids?

• Why are they important?

Page 12: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Turbidity

• What is it?

• What causes it?

• What wavelengths are involved?

• Are all assays affected at these wavelengths?

Page 13: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Interfering spectra

TurbidityNADHAbsorbance

      340     415       450     510        570 600       700 800

Icterus Hemolysis

Wavelength (nm)

Page 14: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

CVD Risk factors

• What are they?

Page 15: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.
Page 16: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Serum Cholesterol Levels in Men*Framingham Heart Study

% P

op

ula

tio

n

0

10

20

30

40

*During first 16 years of study: Entry ages 30–40 yearsAdapted from Castelli WP Can J Cardiol 1988;4(suppl A):5A-10A.

MINo MI

150 200 250 300 350 400 450

Serum cholesterol

3.9(mg/dl)

(mmol/L)5.2 6.5 7.8 9.1 10.3 11.6

Page 17: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.
Page 18: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Increased HDL and Reduced CHD Incidence

Framingham Study

Rel

ativ

e ri

sk o

f C

HD

Adapted from Kannel WB. Status of risk factors and their consideration in antihypertensive therapy. Am J Cardiol 1987;59:80A-90A.

0

1

2

3 LDL 220 mg/dl

LDL 160 mg/dl

LDL 100 mg/dl

(mmol/L)

(5.7)

(4.1)

(2.6)

HDL

250.65

350.90

(mg/dl)(mmol/L)

451.16

551.42

651.68

751.94

852.20

Page 19: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

0

1

2

3

4

Copenhagen Male StudyRelative Risk for Ischemic Heart Disease (IHD) during8 Years according to Level of Fasting Triglycerides

Rel

ativ

e ri

sk o

f IH

D

Adapted from Jeppesen J et al Circulation 1998;97:1029-1036.

1.01.5

2.2

TG level (thirds)

0.88(0.44–1.09)

78

1.33(1.10–1.59)

117

2.45(1.60–22.4)

217

(mmol/L)

(mg/dl)

P <.05

P <.001

Adjusted for:AgeLDL-CHDL-CAlcohol useTobaccoPhysical activityBMISBP/DBPHTNNIDDMGlycosuriaLow social class

Page 20: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Lipoproteins

• Name as many lipoproteins as you can?

Page 21: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Lipoproteins

• LDL

• HDL

• Chylomicrons

• Chylomicron remnants

• VLDL

• IDL (VLDL remnants)

• Lp (a)

Page 22: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Lipoproteins

• Where do they come from?

Page 23: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

HDL Metabolism and Atherosclerosis

Courtesy of HB Brewer Jr, MD

SR-BI

Liver

LRPLDLr

VLDL

CholesterolPool

CD36SR-A

LDLIDL

LPL

LPLE

E

BB

B

HLC-IIC-II

Chylomicron Remnant

Chylomicron

Intestine

E

B

B

LPL

ABC1

Arterial WallMacrophage

CETP LipidsA-I

A-ILCAT

HDL

NascentHDL

Oxidation

KidneyHDL-R

C-II

Page 24: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Lipoprotein Treatment Priorities

• Total cholesterol (LDL cholesterol)

• HDL cholesterol

• Triglycerides

Page 25: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

UKPDS: Major Identified Risk Factors

Adapted from Turner RC et al BMJ 1998;316:823-828.

• LDL cholesterol

• Diastolic blood pressure

• Smoking

• HDL cholesterol

• HbA1C

Page 26: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Joint British Recommendations Dec 1998

Cost Effectiveness

• ‘in determining health policy, cost

effectiveness rather than the cost of

drugs is of pivotal importance. It is

clear that treatment of the elderly and

those at highest risk is more cost

effective’

Page 27: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Number of individuals needed to be treated (NNT) to prevent a coronary event versus underlying CHD risk*

0 1 2 3 4 5 6

Primaryprevention(high risk)

Primaryprevention

Secondaryprevention

WOSCOPS all

WOSCOPShigh risk

4 S

% CHD event rate/year

NN

T

50

40

30

20

10

0

*Data taken from several recent clinical trials.

Page 28: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

CHD Mortality in Type 2 Diabetics

Adapted from Haffner SM et al (East-West Study in Finland) New Engl J Med 1998;339:229-234.

% S

urv

ival

100

80

60

40

20

0

Non-diabetic, no MI (n=1304)Type 2, no MI (n=890)Non-diabetic, MI (n=69)

Type 2, MI (n=169)

0 1 2 3 4 5 6 7 8

Years

Page 29: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

2o causes of dyslipidaemia

• Obesity

• Diabetes Mellitus

• Alcohol abuse

• Liver disease

• Renal disease

• Hypothyroidism

• Medication

Page 30: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Why rule out 2o causes?

• Good medicine - treat the

cause, not the resulting

condition

• Increased side effects, e.g.,

hypothyroidism and statins

Page 31: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

How low should we go?

Page 32: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Lipid Management in Clinical Practice

70

40

20

0

10 13 26 35 50 60

% LDL-C reduction

% R

edu

ctio

n in

ris

k o

fca

rdia

c e

nd

po

ints LRC-CPPT (cholestyramine)

CARE (pravastatin)

WOSCOPS (pravastatin)

4S (simvastatin)

?

?

What Is an Appropriate Therapeutic Target for LDL Cholesterol?

LRC-CPPT = Lipid Research Clinics–Coronary Primary Prevention Trial; CARE = Cholesterol and Recurrent Events; WOSCOPS = West of Scotland Coronary Prevention Study; 4S = Scandinavian Simvastatin Survival Study

Page 33: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Joint British Recommendations Dec 1998

Lipids

• ‘at least to an LDL cholesterol less

than 3.0 mmol/L (total cholesterol less

than 5.0 mmol/L)’ in established CHD

• ‘Patients who fail to reach this target

should be referred to a specialist

clinic’

Page 34: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Lipids - rechecking

• 3 months after dietary advice

• 4 - 6 weeks after drug

initiation/change in dosage

Page 35: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

QUESTIONS

• Do high risk populations achieve similar benefit irrespective of starting cholesterol (or LDL-C) concentrations?

• Is there benefit from starting statins immediately post-event rather than waiting until 3-6 months as in 4S, CARE etc.?

• Do high risk populations achieve extra benefit from intensive cholesterol (or LDL-C) lowering?

Page 36: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

HPS: VASCULAR EVENT by PRIOR LIPID LEVELS

Risk ratio and 95% CISTATIN PLACEBOBaselinefeature (10269) (10267) STATIN better STATIN worse

LDL (mmol/l)

Het = 3.0

< 3.0 (116 mg/dl) 602 761

3.0 < 3.5 483 655

3.5 (135 mg/dl) 957 1190

Total cholesterol (mmol/l)

Het = 0.5

<5.0 (193 mg/dl) 361 476

5.0 < 6.0 746 965

6.0 (232 mg/dl) 935 1165

ALL PATIENTS 2042 2606(19.9%) (25.4%)

24% SE 2.6reduction(2P<0.00001)

0.4 0.6 0.8 1.0 1.2 1.4MRC/BHF Heart Protection Study. Lancet 2002;360:7-22.

2

2

2

2

Page 37: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Lipid Lowering and Recent Statin Trials

• MIRACL

• REVERSAL

• PROVE IT – TIMI 22

Page 38: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Schwartz GG et al. Am J Cardiol 1998;81:578–581.

MIRACL: Addressed a Research Gap

Acute coronaryevent

MIRACL

4S

AFCAPS / TexCAPS/WOSCOPS

CARE/LIPID

4 moNo history of CAD Unstable CAD

Randomization:24–96 h

3 mo

t=0

6 mo

Randomization:CARE - 3–20 moLIPID - 3–36 mo

Randomization:>6 mo

Stable CAD

Primary prevention Secondary prevention

Page 39: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Schwartz GG et al. JAMA 2001; 285(13)1711-1718

Hospitalisationfor

unstable anginaor non-Q-wave

MI

Placebo

Atorvastatin 80

mg

n=3,086Randomised

24-96 hoursafter

admission

16 weeks

Assessments conducted at weeks 0, 2, 6 and 16

MIRACL - Study Design

Study Hypothesis: Lipid lowering with atorvastatin 80mg started within 24 - 96 hours of hospitalisation following diagnosis of unstable angina or non-Q-wave acute MI, reduces early recurrent ischaemic events.

Page 40: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Schwartz GG et al. JAMA 2001; 285(13)1711-1718

Baseline End of studyMean of both groups % Change Atorvastatin vs. placebo

mmol/L

Total cholesterol 5.3 -34%

LDL cholesterol 3.2 -52% (1.9mmol/L)

HDL cholesterol 1.2 +1.6%

Triglycerides 2.0 -25%

Lipids at Randomisation and Study End

Page 41: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Schwartz GG et al. JAMA 2001; 285(13)1711-1718

Relative Risk = 0.84(0.70-1.00), p=0.048

Atorvastatin

Placebo

0

5

10

15

0 4 8 12 16Time since randomisation (weeks)

Cumulative incidence (%)

Time to first occurrence of:

Death Nonfatal MI Resuscitated cardiac arrest Worsening angina with

objective evidence of ischaemia requiring rehospitalisation

17.4%

14.8%

Relative Event Rate Reduction in Primary Endpoint

Page 42: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Nissen SE et al. JAMA 2004; 291(9)1071-1080

REVERSAL

657 CHD Patients

Atorvastatin 80mg Pravastatin 40mg

Randomised, double blind multicentre trial performed at 34 community and tertiary care centres in the United States

Primary endpoint: % change in Coronary Plaque Volume by IVUS

253 patients with IVUS at baseline and 18 months

249 patients with IVUS at baseline and 18 months

Page 43: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Nissen SE et al. JAMA 2004; 291(9)1071-1080

Patient Population• Inclusion criteria:

– Patients aged 30-75 years requiring diagnostic coronary angiography

for a clinical indication

– LDL-cholesterol between 3.2 mmol/L and 5.4 mmol/L

• Angiographic inclusion criteria:– Angiographic evidence of CHD defined as ≥ 1 lesion with ≥ 20% reduction in lumen diameter in

any coronary artery

– ≤ 50% reduction in lumen diameter of the left main coronary artery

– The vessel undergoing IVUS evaluation (the ‘target’ vessel) should have ≤ 50% stenosis throughout a segment of minimum length of 30 mm

Page 44: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Nissen SE et al. JAMA 2004; 291(9)1071-1080

Intravascular Ultrasound (IVUS)

REVERSAL: Why was IVUS used?REVERSAL: Why was IVUS used?REVERSAL: Why was IVUS used?

Angiogram IVUS Image

Page 45: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Nissen SE et al. JAMA 2004; 291(9)1071-1080

% Change from Baseline in Lipid Parameters

*P<.001

-40

-30

-20

-10

0

10

Atorvastatin

-50

Cha

nge

from

bas

elin

e (%

)Total cholesterol LDL-cholesterol

-25.2

-18.4

5.6

-6.8

-46.3*

-34.1*

2.9

-20.0*

Triglycerides HDL-cholesterol

Pravastatin

2.04mmol/L

Page 46: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Nissen SE et al. JAMA 2004; 291(9)1071-1080

Percent Change in Total Atheroma Volume

* vs baseline† between groups

p = 0.02†

3.5

3

2.5

2

1.5

1

0.5

0

-0.5

-1

2.7

-0.4

Progression (p=0.001*)

No change (p=0.98*)

% Change in Total Atheroma

Volume

Pravastatin Atorvastatin

Page 47: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Nissen SE et al. JAMA 2004; 291(9)1071-1080

Comparative Adverse Events

Pravastatin

(n=327)

Atorvastatin

(n=327)

Death 1 (0.3%) 1 (0.3%)

Myocardial Infarction 7 (2.1%) 4 (1.2%)

Stroke 1 (0.3%) 1 (0.3%)

A L T > 3 x U L N 5/316 (1.6%) 7/311 (2.3%)

A S T > 3 x U L N 2/316 (0.6%) 2/311 (0.6%)

C K > 10 x U L N 0/316 (0.0%) 0/311 (0.0%)

Page 48: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Nissen SE et al. JAMA 2004; 291(9)1071-1080

Study Limitations

• The REVERSAL study was not powered to assess differences in clinical events

• Morbidity and mortality endpoints are always the preferred efficacy measures in clinical trials

• However, comparison of two statins in a conventional events trial would require approximately 10,000 patients and 5-6 years follow-up

• Furthermore, previous trials have demonstrated a relationship between atherosclerosis progression and vascular events

Page 49: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cannon CP et al. NEJM 2004; 350(9):15

PROVE IT – TIMI 22 Rationale

• Are statins effective in reducing cardiac events when started early after an acute coronary syndrome (ACS)?

• Do the benefits of “intensive” LDL-C lowering to ~1.8mmol/L with 80mg atorvastatin achieve a greater reduction in clinical events than “standard” LDL-C lowering to ~2.6mmol/L with 40mg pravastatin?

(Pravastatin Or Atorvastatin Evaluation and Infection Therapy - Thrombolysis in Myocardial Infarction 22)

Page 50: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cannon CP et al. NEJM 2004; 350(9):15

PROVE IT – TIMI 22: Study Design4,162 patients with an Acute Coronary Syndrome < 10 days

ASA + Standard Medical Therapy

Intensive Therapy(Atorvastatin 80 mg)

Standard Therapy(Pravastatin 40 mg)

2x2 Factorial: Gatifloxacin vs.

placebo

Duration: Mean 2 year follow-up (> 925 events)

•Primary Endpoint: Death, MI, Documented UA requiring hospitalisation,Revascularisation (>30 days after randomisation), and Stroke

•Randomised, double blind study•349 sites in 8 countries

•Designed as a non - inferiority trial

Page 51: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cannon CP et al. NEJM 2004; 350(9):15

Patient Population

Inclusion Criteria:

• Hospitalisation for acute MI or high-risk unstable angina within the last 10 days

• Total cholesterol < 6.2mmol/L (< 5.2mmol/L if on lipid lowering therapy)

• Stabilised (i.e.without ischemia, CHF, post PCI if planned)

Page 52: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cannon CP et al. NEJM 2004; 350(9):15

Baseline Characteristics

Atorvastatin 80mg(2099)

Pravastatin 40 mg

(2063)

Mean Age (years) 58 58

Male/Female (%) 78/22 78/22

History of Hypertension (%) 51 49

Current Smoker (%) 36 37

History of Diabetes (%) 18 18

Prior MI (%) 18 19

STEMI/NSTEMI/UA (%) 36/36/29 33/37/30

Prior Statin Use (%) 26 25

Page 53: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cannon CP et al. NEJM 2004; 350(9):15

Concomitant Therapies

PCI for initial ACS pre-randomisation 69%

Aspirin 93%

Warfarin 8%

Clopidogrel/ticlopidine (initial)

(at 1 year)

72%

20%

B-blockers 85%

ACE Inhibitors 69%

AII receptor blockers 14%

Statin Therapy 25%

Page 54: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cannon CP et al. NEJM 2004; 350(9):15

Baseline Lipid Levels

Median Values* Atorvastatin 80mg(2099)

Pravastatin 40 mg(2063)

Total Cholesterol (mmol/L) 4.7 4.7

LDL Cholesterol (mmol/L) 2.7 2.7

Triglycerides (mmol/L) 1.8 1.7

HDL Cholesterol (mmol/L) 1.0 1.0

* 25% of patients receiving statin therapy prior to randomisation

Page 55: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cannon CP et al. NEJM 2004; 350(9):15

Changes from (Post-ACS) Baseline in Median LDL-C

0

20

40

60

80

100

120

Rand. 30 Days 4 Mos. 8 Mos. 16 Mos. Final

LDL-C (mg/dL)

Pravastatin 40mg

Atorvastatin 80mg P<0.001

Median LDL-C achieved2.5mmol/L

1.6mmol/L

Note: Changes in LDL-C may differ from prior trials:•25% of patients on statins prior to ACS event and no washout period•LDL-C is transiently lowered by the acute coronary event itself

Page 56: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cannon CP et al. NEJM 2004; 350(9):15

Benefits of Intensive Lipid Lowering on

All-Cause Death or Major CV Events (Primary Endpoint at 2 Years)

0

5

10

15

20

25

30

0 3 6 9 12 15 18 21 24 27 30

Pravastatin 40mg(26.3%)

Atorvastatin 80mg(22.4%)

16% RRR (5-26)(P = 0.005)

% withEvent

Months of Follow-up

Criteria for equivalence were not met

Atorvastatin 80mg was superior to Pravastatin 40mg

Page 57: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cannon CP et al. NEJM 2004; 350(9):15

Tolerability and Safety Profile

Atorvastatin80mg (2099)

Pravastatin40mg (2063)

P-value

Discontinuation for AE, patient preference or other reasons

30.4% 33.0% 0.11

Discontinuation for Myalgia/CK

elevation3.3% 2.7% 0.23

Rhabdomyolysis 0% 0% N/A

ALT ≥3 ULN 3.3% 1.1% <0.001

Dose halving for AE or raised ALT

1.9% 1.4% 0.20

Page 58: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

How low should we go?

Page 59: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

New Targets

• LDL cholesterol <2.0 mmol/L

• Total cholesterol <4.0 mmol/L)

Page 60: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Joint British Recommendations Dec 1998

What class of drugs?

• ‘The best evidence of cholesterol

lowering in secondary prevention

comes from randomised

controlled trials using statins;

these drugs are thus the preferred

class for CHD patients’

Page 61: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Overview of Early Secondary Prevention Trials

–9–6

–15

–10

–29

–13

–35

–23

-40

-30

-20

-10

0

Pe

rcen

tag

e C

ha

ng

e

Total-C* CHD events*

CDP: clofibraten=8341; P=NS

CDP: niacinn =8341; P=NS

Stockholm: clofibrate + niacinn =555; P=NS

POSCH: partial ileal bypassn =838; P<0.001

CDP, Coronary Drug Projects; NS, not significant; POSCH, Program on Surgical Control of the Hyperlipidaemias. *Net difference between treatment and control groups (P values are for events). Kwiterovich PO. Am J Cardiol 1998;82(12A):3U–17U.

Page 62: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Joint British Recommendations Dec 1998

What class of drugs?

• ‘Generally a statin should be

the initial choice of therapy in

combined hyperlipidaemia,

certainly when the triglycerides

are less than 5.0 mmol/L’

Page 63: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.
Page 64: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.
Page 65: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.
Page 66: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Am J Cardiol 1997; 80: 166-167

Rule of 5 & Rule of 7

• A doubling of each statin lowers

Total cholesterol an additional 5%

• A doubling of each statin lowers

LDL cholesterol an additional 7%

Page 67: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Treating to Target

• Patient with CHD or with CHD risk over 10 years > 30%

with LDL cholesterol of 4.0 mmol/L

–Target LDL cholesterol < 3.0 mmol/L

–Desired LDL cholesterol reduction 25 %

• Choose a drug that can achieve the target

• Note cost and evidence

Page 68: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

LDL-C reduction and statins

0 -10 20 -30 -50 -60-5 -15 -25 -35 -45 -55

20mg

40mg

80mg‡

-40

20mg

40mg

80mg

LDL-C: Mean change (%) from baseline at week 6

20mg‡

40mg‡

40mg‡ ‡

20mg

Jones PH for the STELLAR Study Group. JACC 2003;41:in press.

rosuvastatin

simvastatin

atorvastatin

10mg

10mg

10mg

10mg

pravastatin

p<0.002 vs. rosuvastatin 10mg ‡ p<0,002 vs, rosuvastatin 20mg p<0.002 vs. rosuvastatin 40mg

Page 69: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Serum Cholesterol Levels in Men*Framingham Heart Study

% P

op

ula

tio

n

0

10

20

30

40

*During first 16 years of study: Entry ages 30–40 yearsAdapted from Castelli WP Can J Cardiol 1988;4(suppl A):5A-10A.

MINo MI

150 200 250 300 350 400 450

Serum cholesterol

3.9(mg/dl)

(mmol/L)5.2 6.5 7.8 9.1 10.3 11.6

Page 70: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

RIGHT SKEWED DISTRIBUTION

Page 71: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

PROBLEMS WITH TREATMENT TO TARGET

• Bias

–Analytical

–Biological

• Variation

–Analytical

–Biological

• Combination of both

Page 72: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

BIAS

Page 73: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

ANALYTICAL BIAS

•Cholesterol

–Probably minimal

•Blood Pressure

–Potentially large

Page 74: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

THE NORMAL DISTRIBUTION

Page 75: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

TOTAL VARIATION

Biological Analytical Total

Cholesterol

6.5% 2.5% 6.9%

SBP 7% 5% 8.6%

 

Page 76: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Effect of Variation

• Cholesterol (mmol/L)

–Mean 5.0

–Upper 95% confidence interval 5.7

–Lower 95% confidence interval 4.3

Page 77: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

TREATMENT TO TARGET

• Populations are made up of individuals

• If an individuals cholesterol has an average of 5.0 mmol/L, then 50% of the time it is above 5.0 mmol/L

• To be sure that 60% of CHD patients have a cholesterol <5.0 mmol/l means that a lower target cholesterol will be necessary to achieve this

• The mean - 2.8 x CVtotal is the value to ensure that a

patient is always (100%) below the target

• This value is c4.0 mmol/L

Page 78: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

TREATMENT TO TARGET

• If you set a target cholesterol of 4.0 mmol/L for 60% of your patients, then you should achieve the contract target

• This allows lee-way for those with diabetes, mixed dyslipidaemia/resistance to therapy, etc.

• Alternatively, you can set a higher target for >60% of your patients

• This target MUST be <5.0 mmol/L to achieve the contract target in practice

Page 79: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

RIGHT SKEWED DISTRIBUTION

Page 80: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Raised ALT

• ALT NOT liver function tests

• Stop if consistently above 3 times upper

reference limit (111 U/L in Ipswich)

• Suggest measure ALT only to KEEP IT

SIMPLE

• BNF states assessment only for first year

Page 81: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Risk:Benefit – Liver

Brewer HB. Am J Cardiol 2003;92(Suppl):23K–29K

0.0

0.5

1.0

1.5

2.0

2.5

3.0

20 30 40 50 60 70

LDL-C reduction (%)

Persistent ALT >3 × ULN (%)

Rosuvastatin (10–40 mg)

Atorvastatin (10–80 mg)

Fluvastatin (20–80 mg)

Simvastatin (40–80 mg)

Persistent ALT >3 Persistent ALT >3 ×× ULN: Frequency by LDL-C Reduction ULN: Frequency by LDL-C Reduction

Page 82: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Muscle Problems

• Myo-, from Greek: of muscle

• Myopathy: muscle pathology

• Myalgia: muscle pain

• Myositis: muscle inflammation

• Rhabdomyolysis skeletal muscle breakdown

Page 83: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

BNF March 2001 p125

Muscle Problems

• ‘Should a patient complain of muscle ache or

other minor muscle related problems, it is

recommended that a Creatine Kinase (CK) level be

analysed. A pre-treatment baseline level is

important for comparison purposes’

• Patient should NOT be started on a statin if the

pre-treatment CK level is >5 times normal (> 1,000

U/l in men, > 750 U/l in women)

Page 84: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

BNF March 2001 p125

Muscle Problems

• ‘If the creatine kinase concentration is markedly elevated (>10 times upper limit of normal), and myopathy is suspected or diagnosed, treatment should be discontinued’

• Monitoring of creatine kinase is required if patients of lipid-lowering medications have muscle symptoms

Page 85: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.
Page 86: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Muscle Problems

• Myositis, defined as muscle inflammation with

CK levels 10 times normal (> 2,000 U/l in men,

>1,500 U/l in women), is rarely reported.

• It is important to note that the CK level returns

to normal within 48 hours of discontinuing lipid

lowering medication.

Page 87: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

BNF March 2001 p125

Muscle Problems

• Rhabdomyolysis associated with lipid lowering drugs is rare (1 case in every 100,000 treatment years) but may be increased in those with renal impairment and possibly those with hypothyroidism

• Concomitant treatment with cyclosporin or in combined statin and fibrate therapy may be associated with increased risk of serious muscle toxicity

Page 88: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

CK >10 × ULN frequency by % LDL-C reduction

0.00.0

0.50.5

1.01.0

1.51.5

2.02.0

2.52.5

3.03.0

2020 3030 4040 5050 6060 7070

% LDL-C reduction% LDL-C reduction

% C

K >

10

× U

LN

% C

K >

10

× U

LN

Rosuvastatin (10–40mg)Pravastatin (40–80mg)

Cerivastatin (0.2–0.8mg) Atorvastatin (10–80mg)

Simvastatin (40–80mg) (40–80mg)

Brewer HB. Brewer HB. Am J CardiolAm J Cardiol 2003;92(Suppl):23K–29K 2003;92(Suppl):23K–29K

Risk:Benefit – MuscleRisk:Benefit – Muscle

Page 89: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

Cumulative post-marketing reporting rate of rhabdomyolysis for rosuvastatin

Reporting rate <1:10,000 = very rare (CIOMS)

Patients = new and switched prescriptions

Update: 08 December 2004

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

04-Jun-2003

30-Jul-2003

24-Sep-2003

19-Nov-2003

14-Jan-2004

10-Mar-2004

05-May-2004

30-Jun-2004

25-Aug-2004

20-Oct-2004

01-Dec-2004

Week starting

Reporting rate per

10,000 patients

Reporting rate - ALL

Reporting rate - ACC/AHA criteria

Page 90: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

90

Reporting rates of rhabdomyolysiswith lipid-modifying therapy

Semiannual Reporting Rates for All Reports of Rhabdomyolysis

US Cases*

0

20

40

60

80

100

120

03/99-08/99

09/99-02/00

03/00-08/00

09/00-02/01

03/01-08/01

09/01-02/02

03/02-08/02

09/02-02/03

03/03-08/03

06/03-11/03

12/03-05/04

06/04-11/04

Cerivastatin

Fluvastatin

Atorvastatin

Pravastatin

Simvastatin

Ezetimibe

Rosuvastatin

Reporting Rate Per

1,000,000 US Prescriptions **

Rosuvastatin†

Worldwide Cases‡

Reporting Rate Per 1,000,000

CRESTOR Prescriptions Worldwide‡

80

0

100

120

60

40

20

*All spontaneous reports including expedited, periodic and direct reports. **US reporting rate for all statins and ezetimibe based on FDA Adverse Events Reporting System made available through Freedom of Information Act divided by US prescribing data supplied by IMS through August 2003.†Cerivastatin reports received after September 1, 2001, are excluded.

‡Global reporting rate for rosuvastatin based on spontaneous report counts of rhabdomyolysis within AstraZeneca global drug safety database divided by estimated worldwide prescriptions to end November 2004. Total prescriptions based on IMS data from US, Canada, UK, France, Italy and The Netherlands; rest of world prescriptions based on actual sales calculations.

Update: 08 December 2004

Page 91: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

SUFFOLK BEER

Page 92: ALL YOU NEED TO KNOW ABOUT LIPIDS BUT WERE AFRAID TO ASK! Dr. Pat Twomey, Consultant Chemical Pathologist The Ipswich Hospital.

THANK YOU