Heart Failure Management Updatebsmedicine.org/congress/2017/Prof._Rafique_Ahmed.pdfcongestive heart...
Transcript of Heart Failure Management Updatebsmedicine.org/congress/2017/Prof._Rafique_Ahmed.pdfcongestive heart...
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Heart Failure
Management Update
Rafique Ahmed, MD, PhD, FACC, FCPS
Consultant Cardiac Electrophysiologist
Baltimore, Maryland, USA
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Heart Failure - Definition
The situation when the heart is incapable of maintaining a cardiac output adequate to accommodate metabolic
requirements of the body and venous return
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Congestive Heart Failure -
Definition
+ Volume overload
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Heart Failure Classification
HFrEF: Heart failure with reduced Ejection fraction, LVEF <40%
HFmrEF: Heart failure with mid range EF, LVEF 40 – 49%
HFpEF: Heart failure with preserved EF, LVEF >50%
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Progression of Cardiovascular Disease
Adapted from: Levy et al. J Am Coll Cardiol. 1993;22(4):1111-1116.
MI
LVH
Diastolic
Dysfunction
Systolic
Dysfunction
Progressive Heart Failure
/ Sudden Death
Normal LVStructureand Function
SubclinicalLVDysfunction
LVRemodeling
ClinicalHeart Failure
Years Years/Months
Coronary Artery
Disease
Hypertension
Cardiomyopathy
Valvular Disease
= Possible pathway
of progression
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NR 70M
• Presented to hospital July 12, 2017 with
SOB with mild exertion
• Past Med Hx: HTN, DM on losartan 25
mg daily
• Physical Exam: Few basilar crackles
• Labs: K 5.4, otherwise normal
• ECG:
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NR 70M
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NR 70M
• Echocardiogram:
– July 14, 2017: LVEF 20 – 25%
• Cardiac Cathterization: July 14, 2017
– LVEF 25 – 30%, LCX 40-50% stenosis,
other arteries showed minimal disease
• Started Metoprolol succinate 25 mg daily,
lisinopril 5 mg daily, spironlactone 25 mg
daily
• Metoprolol gradually increased to 100 mg
daily
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NR 70M
• Echocardiogram: October 10, 2017:
– LVEF 25%
• Nov 11, 2017: Still SOB 1 flight of stairs
• Nov 28, 2017: Biventricular defibrillator
implantation
• ECG:
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NR 70M
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NR 70M
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The Donkey Analogy
Heart dysfunction limits a patient's ability to
perform the routine activities of daily living…
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CHF: Epidemiology
• 5 million Americans have heart failure
• 550,000 new cases diagnosed annually
• Over 250,000 deaths annually
• Over 850,000 hospitalizations annually
• Economic impact $40 billion dollars
annually
• Incidence and prevalence increasingSource:AHA,CDC
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ACC-AHA Clinical Classification
Farrell M et al, JAMA 2002
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Myocardial
InsultMyocardial
Dysfunction
Renin-Angiotensin-Aldosterone
System Activation
Sympathetic System
Activation
Reduced System
Perfusion
Altered Gene
Expression Apoptosis
Remodeling
Complex cascade
Pathogenesis of Heart Failure
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Etiology
• Systolic Failure
– CAD
– HTN
– Dilated Cardiomyopathy
• Idiopathic
• Toxic
– ETOH
– Doxorubicin
• Infection
– Viral
– Parasites
– Other
• Hemochromatosis
• Diastolic Failure
– HTN
– HCM
– Restrictive Cardiomyopathy
• Amyloidosis
• Sarrcoidosis
– Constrictve Pericarditis
– High-output failure
• Chronic anemia
• AV shunts
• Thyrotoxicosis
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History, Physical Exam & Rx Plan
• Detail history including level of activity that causes
shortness of breath
• Any symptom to suggest CAD
• Any recent viral infection
• Plan of care:
– short, but frequent visits to physician.
– At each visit patient’s symptom should be compared with
baseline presentation
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Diagnostic Work up
• CBC, urine analysis,
BMP, LFT, TSH, BNP
• ECG
• CXR
• Echocardiography
– Systolic dysfunction
– Diastolic dysfunction
– Wall motion
abnormality
– Valvular dysfunction
• Cardiac Catheterization
• Noninvasive imaging to
detect ischemia
• Endomyocardial biopsy
(IIb)
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BNP Levels in Patients With Dyspnea
Secondary to CHF or COPD
86 +/- 39
1076 +/- 138
0
200
400
600
800
1000
1200
BN
P p
g/m
L
COPD CHF
Cause of DyspneaN=56 N=94
Dao, Q., Maisel, A. et al. J. American College of Cardiology, Vol 37, No. 2, 2001
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BNP Levels of Patients Diagnosed
Without CHF, With Baseline Left Ventricular
Dysfunction, and With CHF
38+/-4141+/-31
1076+/-138
0
200
400
600
800
1000
1200
BN
P p
g/m
l
No CHF LV Dysfunction
No acute CHF
CHF
N=139 N=14 N=97
Dao, Q., Maisel, A. et al. J. American College of Cardiology, Vol 37, No. 2, 2001
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Treatment Goals in the
Management of Heart Failure
• Relieve symptoms
• Reduce morbidity
• Improve survival
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Drug Therapy
• Diuretics
• Positive inotropes
• Vasodilators – ACEI, ARB
• -blockers
• Spironolactone
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Digitalis Compounds
Like the carrot placed in front of the donkey
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Diuretics, ACE Inhibitors, ARB
Reduce the number of sacks on the wagon
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Angiotensin II Norepinephrine
ACE inhibitor
Disease Progression
Effect of ACE Inhibition
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Aldosterone
Sympathetic
activation
Growth
factor
stimulation
NA+ retention
H2O retention
K+ excretion
Mg+ excretion
Vascular
smooth muscle
constriction
Angiotensin
converting
enzyme
(ACE)
Angiotensin II
Liver secretes
angiotensinogen
Kidneys secrete
renin
The Renin-Angiotensin-Aldosterone (RAA) System
Angiotensinogen Angiotensin I
Adrenal cortex secretes aldosterone
Blood Renin
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Dual Intervention in RAA System
Pathways to Target Receptor Sites
AldosteroneAngiotensinogen
Angiotensin I Angiotensin IICE
Renin
Chymase
Bradykinin Inactive
K+Na+
ACTHOther
= Angiotensin II receptor blockade
= Aldosterone receptor blockade
Adrenal
Vascular
Myocardial
Renal
CNS
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Effect of ACEIs in Patients with
Symptomatic HF
CONSENSUS*NYHA Class IV
SOLVD Treatment†
NYHA Class II-III
Adapted from CONSENSUS Trial Study Group N Engl J Med 1987;
SOLVD Investigators N Engl J Med 1991
Placebo
(n=126)
Enalapril
(n=126)
Enalapril
(n=1285)
60
80
40
20
0
Placebo
(n=1284)
Mo
rtality
(%
)
126 18 30 36 420 24 48
Months
*Risk reduction 40% (P=0.003) †Risk reduction 16% (P=0.0036)
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Effect of ACEIs in Post-MI
Patients with LVSD
60 Treatment Started 3 to 16 Days After MI
SAVE
n=2231
AIRE
n=2006
TRACE
n=1749
0
20
40
Mo
rta
lity
ra
te (
%)
P=0.019
19%
TrandolaprilRamiprilCaptopril
P=0.002
27%
P=0.001
24%
Adapted from Pfeffer M, et al N Engl J Med 1992; AIRE Study Investigators Lancet
1993;
Kober L, et al N Engl J Med 1995
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Val-HeFT
ARB vs Placebo
Months Since Randomization
Pro
ba
bil
ity o
f S
urv
ival
(%)
P=0.80
0 3 6 9 12 15 18 21 24 27
100
95
90
85
80
75
70
0
Placebo
Valsartan
Months Since Randomization
Pro
ba
bil
ity o
f E
ven
t-F
ree
Su
rviv
al (%
)
P=0.008
0 3 6 9 12 15 18 21 24 27
100
95
90
85
80
75
70
65
60
0
Placebo
Valsartan
Cohn JN, et al. N Engl J Med. 2001;345:1667-1675.
All-Cause Mortality All-Cause Mortality/Morbidity
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Aldosterone’s Role in Cardiovascular Disease
McMahon EG. Current Opinion Pharmacol. 2001;1:190-196.
Prothrombotic
effectsPotassium and
magnesium loss
Vascular
inflammation
and injury
Myocardial
fibrosis
Central
hypertensive
effects
Endothelial
dysfunctionVentricular
arrhythmias
Sodium
retention
Catecholamine
potentiation
Deleterious Effects
of Aldosterone
Cardiovascular Disease
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Spironolactone Prevents
Myocardial Fibrosis
Aldosterone Infusion
in Uninephric Rat
Treatment HBP LVH Fibrosis
Control
(aldosterone
active)
Yes Yes Yes
Yes Yes No
No No No
HBP = high blood pressure; LVH = left ventricular hypertrophy
Low-dose
spironolactone
High-dose
spironolactone
Adapted from Weber KT, Brilla CG. Circulation. 1991;83:1849-1865.
Fibrosis
No fibrosis
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Mortality Reduction with
Spironolactone in HF: “RALES”
Kaplan–Meier
Analysis: risk of
death was 30
percent lower
among patients in
the spironolactone
group than among
patients in the
placebo group
(P<0.001).
Pitt B et al, N Engl J Med 1999
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Angiotensin II Norepinephrine
Effect of -Blockade
-Blockade
Disease Progression
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CNS sympathetic outflow
Cardiac sympathetic activity Renal sympathetic activity
Sodium retention
Myocyte hypertrophy
Myocyte injury
Increased arrhythmias
Disease progression
111 2 1
Vascular sympathetic activity
Vasoconstriction
1
Activation
of RAS
Adrenergic Pathway in
Heart Failure Progression
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Adapted from Bristow MR. J Am Coll Cardiol. 1993;22(4 Suppl A):61A–71A.
Ratio of Adrenergic Receptors
in the Heart
1 2 1
Normal Heart 70 20 10
Failing Heart 50 25 25
In the failing heart, the ratio of receptors shifts,
increasing the relative proportion of 2 and 1
receptors
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Sympathetic Activation
1
receptors
2
receptors
1
receptors
Cardiotoxicity
Selectivity of -Blocking Agents
1 selective
blockade
non-selective
blockade 1, 2, 1
blockade
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Major Placebo Controlled Trials of
Beta-Blockade in Heart Failure
*NOT AN APPROVED INDICATION
Target Mean DosageHF Patients Follow-up Dosage Achieved Effects on
Study Drug Severity (n) (yrs) (mg) (mg/day) Outcomes
CIBIS bisoprolol* moderate/ 641 1.9 5 qd 3.8 All-cause mortalityCirc. 1994 severe NS
CIBIS-II3 bisoprolol* moderate/ 2647 1.3 10 qd 7.5 All-cause mortalityLancet 1999 severe 34% (P<.0001)
MDC metoprolol mild/ 383 1 200 qd 108 Death or need forLancet 1993 tartrate* moderate transplant
(primary endpoint) NS
MERIT-HF1 metoprolol mild/ 3991 1 200 qd 159 All-cause mortalityLancet 1999 succinate moderate 34% (P=.0062)
BEST4 bucindolol* moderate/ 2708 2 50-100 152 All-cause mortalityNEJM 2001 severe bid NS
US Carvedilol2 carvedilol mild/ 1094 6.5 6.25 to 50 45 All-cause mortality†
NEJM 1996 moderate months bid 65% (P=.0001)
COPERNICUS5 carvedilol* severe 2289 10.4 25 bid 37 All-cause mortality NEJM 2001 months 35% (P=.0014)
†Not a planned end point. Coreg and Toprol-XL are indicated for the reduction
of the combined endpoint of morbidity and mortality.
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Carvedilol
Placebo0
1
2
3
4
5
6
7
8
LV
EF
(E
F u
nits)
MOCHA*
†
†
‡
Patients receiving diuretics, ACE inhibitors, ± digoxin; follow-up 6 months; placebo (n=84), carvedilol (n=261).*Multicenter Oral Carvedilol Heart Failure Assessment.Adapted from Bristow MR et al. Circulation. 1996;94:2807–2816.
†P<.005 vs placebo.‡P<.0001 vs placebo.
25 mg bid6.25 mg bid 12.5 mg bid
Effect of Carvedilol Dose on Left
Ventricular Ejection Fraction
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Beta blockers are not used routinely
in HF
• 25-30% of HF patients get beta blockers
• Physician perception regarding beta blockers
– Combining ACEI and BBs Rx is a hassle
– Initiation only when stable
– Initiation often leads to deterioration
– Benefits are not seen for months
– Rx can be expensive
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Natriuretic Peptides
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Sacubitral/ Valsartam
• Starting dose 24/26 mg BID
• Titrate to 49/51 mg BID
• Max dose 97/103 mg BID
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Pooled Data from 78 studies (57 RCT)
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Reprinted with permission from Elsevier Science (The Lancet, 1999;353:2001-2007).
MERIT-HF study group. Effect of metoprolol CR/XL in chronic heart failure: metoprolol CR/XL randomized intervention trial in
congestive heart failure (MERIT-HF). LANCET. 1999;353:2005.
NYHA II12%
64%24%
CHF
Other
Sudden Death
Deaths = 103
NYHA IV
56%
11%
33%CHF
Other
Sudden Death
Deaths = 27
NYHA III
26%
15%
59%
CHF
Other
Sudden Death
Deaths = 232
SCD–a prominent mode of death
Sudden Cardiac Death in Heart Failure
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Underlying Arrhythmia of Sudden
Death
VT
62% Bradycardia
17%
Torsadesde Pointes
13%
PrimaryVF8%
Adapted from Bayés de Luna A. Am Heart J. 1989;117:151-159.
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CHF-STAT - Results
Singh SN, et al:NEJM 1995:333;77-82
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Unanswered Question
• Can we reduce mortality in patients
with depressed LV function?
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Sudden Cardiac Death in Heart
Failure Trial
SCD-HeFT
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SCD-HeFT Patient Flow
LVEF < 35%,NYHA Class II or III CHF
N = 2,500 (expected enrollment)
Randomization
Conventional CHF Rx
& placebo
(n = 833)*
Conventional CHF Rx
& amiodarone
(double blind)
(n = 833)*
Conventional CHF Rx
& ICD
(n = 833)*
Bardy GH. PACE 1997;20(4, part II):1148. 53
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Bardy GH. N Engl J Med 2005;352:225-37
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Question
• Can we improve the quality of life
in class III & IV heart failure in
patients who are symptomatic
despite optimal medical
management?
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Sinus
node
AV
node
• Delayed lateral wall
contraction
• Disorganized ventricular
contraction
• Decreased pumping
efficiency
Conduction
block
Ventricular Dysynchrony with LBBB
Issues Associated with Heart Failure
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Achieving Cardiac Resynchronization
Mechanical Goal: Pace Right and Left Ventricles
Cardiac Resynchronization System
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Overview of Device Therapy 58
Cardiac Resynchronization
Therapy• Cardiac resynchronization, in
association with an optimized
AV delay, improves
hemodynamic performance by
forcing the left ventricle to
complete contraction and
begin relaxation earlier,
allowing an increase in
ventricular filling time.
• Coordinate activation of the
ventricles and septum.
ECG depicting cardiac resynchronization
ECG depicting IVCD
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Summary
• Pharmacological treatment is the mainstay in the management of patients with heart failure
• Cardiomyopathy patients with EF <35 should be considered for defibrillator implantation
• Class III/IV CHF patients with LBBB should be considerd for biventricular pacer.
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Summary
• Primary etiology of heart failure should be identified and treated.
• Prevention: is the best treatment for CHF and patients at risk of HF should be treated aggressively.