Echo in Pulmonary HTN - Organization of professionals...
Transcript of Echo in Pulmonary HTN - Organization of professionals...
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Echo in
Pulmonary HTN
Steven Goldstein MD, FACC FASE
Director Noninvasive Cardiology
Medstar Heart Institute
Washington Hospital Center
Tuesday, October 11, 2016
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DISCLOSURE
I have N O relevant
financial relationships
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Pulmonary Artery Pressure
Clinical Importance
• Responsible for symptoms and disability
• Responsible for hemodynamic consequences
• Prognostic importance
• Management decisions
(LV disease, valvular disease, etc)
(acute and chronic lung disease)
(eg operability in congenital HD, MV disease)
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ECG
CHEST X-RAY
PHYSICAL EXAM
Noninvasive Assessment of PA Pressure
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Champion Circulation 2009;120:992-1007
Right Ventricle Pulmonary Arteries F
ail
ure
C
om
pe
ns
ate
d
No
rma
l Thin RV Healthy PA endothelium Thin-walled relaxed PAs Large capillary network
Normal CO Normal PVR Normal perfusion
Normal CO Mild increase in PVR Moderate decrease in perfusion
Hypertrophied RV Abnormal PA endothelium Constricted-stiff PAs Loss of microvessels
Dilated RV Cell proliferation in PA wall Obliterative PA remodeling
Severe decrease in CO Severe increase in PVR Severe decrease in perfusion
Progression of Pulmonary Vascular Disease
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RV – Pulmonary Circulation Unit
• Degree of pulm HTN does not strongly
correlate with symptoms or survival
• RV size, RV mass, and RA pressure
reflect functional status and are strong
predictors of survival
do
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Systolic
Diastolic
Mean
Normal PHTN
20-30
5-12
10-20
>30
>12
>25
Pulmonary Hypertension
What about 21 – 25 mm Hg ?
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Mild
Moderate
Severe
Mean PA Peak PA
20 - 30 30 - 45
46 - 60
>60
30 - 40
>40
Pulmonary Hypertension
Arbitrary Grading
(mm Hg) (mm Hg)
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PAmean = 0.6 x PASP + 2 mm Hg
Estimation of PA Mean Pressure
Chemla Chest 2004;126:1313-17
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Pulmonary Hypertension
• Mean PAP > 25 mm Hg
• PVR > 3 Wood units
• PCWP ≥ 15 mm Hg
Rudski J Am Soc Echocardiogr 2010;23:685-713
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Figure 2. Association of systemic pressure and PASP with age.
≤ 2.8 – 2.9 m/s
35 or 36 mm Hg
Peak TR velocity
Peak systolic pressure (assuming an RA pressure of 3 to 5 mm Hg)
Rudski J Am Soc Echocardiogr 2010;23:685-713
Badesch J Am Coll Cardiol 2009;54:S55-66
Normal Resting Values
Guidelines for the Echocardiographic Assessment
of the Right Heart in Adults (ASE, EAE, ESC, CSE)
*
* “This value may increase with age and increasing BSA . . . “
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Lam et al. Circulation 2009;119:2663-2670
Association of Systemic and PA Pressure with Age
45-54 55-62 63-71 72-96
Age in quartiles (years)
% In
cre
ase
0.9
1.0
1.1
1.2 PASP
SBP
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Lam et al. Circulation 2009;119:2663-2670
Association of Pulmonary Pressure with Age
Age (years)
PA
SP
(m
m H
g) Women: r=0.34; p<0.001
Men: r=0.26; p<0.001
40 60 80 100
15
24
38
60
Pulmonary Circulation
Overall: r=0.31; p<0.001
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Echo is the mainstay of screening and
initial assessment of pulmonary HTN
• Low cost
• Widespread availability
• Potential for bedside application
• Suitable for serial evaluation
Echo is the gold standard for
noninvasive hemodynamic assessment
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Pulmonary Hypertension
Role of Echocardiography
• Diagnose pulmonary HTN
• Determine etiology
• Quantitate PA pressures (PASP, PADP, PAmean)
• Evaluate end effects
• Determine prognosis (RA pressure, mean PA pressure, large pericardial effusion)
(Left heart disease, MV disease, congenital HD, etc)
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Pulmonary Hypertension
Echo Findings
1. Right ventricular hypertrophy and/or dilatation
2. Abnl shape of LV in short axis ("D-shaped")
3. Right atrial dilatation
4. Dilated pulmonary artery
5. Abnormal systolic time intervals
6. Abnormal pulmonic valve motion (M-mode)
a. Prolonged RPEP/RVET
b. Increased PV - TV interval c o
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M-Mode
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diminished "a" dip
rapid opening slope (b-c)
flattened e-f slope
systolic notch
Pulmonary Hypertension
M-Mode Echo Signs
Normal
a b
c
e e
f
d
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Estimation of PA Pressure
Limitations of M-Mode of PV
• Difficulty obtaining adequate recording of PV
• Relatively low sensitivity in detecting PHTN
• Inability to quantitate PA pressure
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Flattened Ventricular Septum
(D-Shaped )
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Determination of PA Pressure
Echo-Doppler Methods
1. Pulmonary acceleration time
2. TR jet velocity method
3. Pulmonic regurgitant jet method
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TR Jet
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JVP
RVSP P
JVP RVSP P = +
Estimation of RV Systolic Pressure (RVSP)
From Maximum Transtricuspid Gradient
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JVP
RVSP P
JVP RVSP P = +
Estimation of RV Systolic Pressure (RVSP)
From Maximum Transtricuspid Gradient
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Peak Velocity of Tricuspid Regurgitant Jet
Determination of RV-RA pressure gradient
RV-RA Gradient = 64 mmHg
Est. of RA Pressure = 10 mmHg
Pulm Art Pressure = 74 mmHg
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Doppler Estimation of RV Systolic Pressure
Simultaneous Doppler and Cath Tracings
Currie JACC 6:750(1985)
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Doppler Estimation of RV Pressure
Simultaneous Cath and Doppler
Max Gradient (catheter), mmHg
Max G
radie
nt
(D
opple
r), m
mH
g
Currie JACC 6:750(1981)
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Peak TR Jet Velocity
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3 Methods of Estimating
Right Atrial Pressure
1. Assume RA pressure of 5, 10, 15, or 20 mmHg
2. Clinical estimate of RA pressure (JVP)
3. IVC "collapsibility index"
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Evaluation of RA Pressure
IVC with resp RA pressure (cm) (%) (mm Hg)
<1.5 Collapse 0-5
Nl (1.5-2.5) >50 5-10
Nl <50 11-15
>2.5 <50 16-20
>2.5 No change >20
CP1007295-3
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IVC
Small
Normal
Normal
Dilated
Dilated
Collapse
Decrease by >50%
Decrease by <50%
Decrease by <50%
No change
Change with Respiration or "sniff"
(<1.5cm)
(1.5-2.0cm)
(1.5-2.0cm)
(>2.0cm)
(>2.0cm)
Estimated Right Atrial Pressure
0 - 5
5 - 10
10 - 15
15 - 20
>20
mmHg
mmHg
mmHg
mmHg
mmHg
Estimation of Right Atrial Pressure
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IVC Collapse
> 40%
< 40%
None
RA Pressure
5 mmHg
10 mmHg
15 mmHg
IVC Collapsibility Index
Kirchner Circ 78:II:550(1988)
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Right Atrial Pressure
Doppler vs Right Heart Cath
Fisher (J Hopkins) Am J Resp Crit Care 2009;179:615-621
Echocardiographic Estimate
Right Atrial Pressure R
HC
Me
as
ure
me
nt
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Doppler Estimation of RV Systolic Pressure
RV Systolic Pressure (Catheter), mmHg
RV
Sys
tolic
Pre
ssu
re
(D
opple
r),
mm
Hg
Currie JACC 6:750(1985)
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Limitations of "Sniff" Test
• Requires patient cooperation
• Tachypneic patients
• Mechanical ventilation
• Lack of standardization of insp effort
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Calculation of PA Systolic Pressure
Estimation of RA Pressure
Trace –1+
2+
3+
4+
4
8
12
16
Degree TR RA Pressure
Ribeiro Am Heart J 134:479(1997)
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Estimation of PA Pressure
Limitations of TR Jet Method
• Absence of detectable TR (10%)
• Nonparallel intercept angle of TR jet
• Misidentification of jet signal (AS, MR)
• RA pressure estimate in ventilated patients
• Presence of pulmonic stenosis
• Wide-open TR (“free TR”) equalization of
RA and RV pressure (nonrestrictive TR jet orifice)
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Pulmonary Artery Systolic Pressure
Average of Echo-Doppler and RHC Measurement Dif
fere
nce b
/w E
ch
o-D
op
ple
r an
d
Rig
ht
Heart
Cath
Measu
rem
en
t
Excellent and good quality Doppler signal
Fair and poor quality Doppler signal
Mathai Advances in Pulm Hypertension 2008;7:1-7
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Case
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Doppler Assessment of PA Systolic Pressure
Importance of Using Multiple Views
Abramson J Am Soc Echocard 8:55(1995)
% M
ax V
elo
city O
bta
ine
d
RV
inflow
mod'd
RV
inflow
SAX Ap-4 Ap
RV
inflow
sub-
cost.
Pedoff
apical
some pts had >1 view with same max vel
16% 15%
11%
26%
21%
11%
32%
0
10
20
30
40
50
V1 V2 V3 V4 V5 V6 V7 .
n = 614 pts some pts had >1 view with same max vel
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Classification of TR Signal Quality
Amsallem J Am Soc Echocardiogr 2016;29(2):93-102 (Feb)
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Case
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TR jet
PR jet
Feasibility
Without
Contrast
94%
80%
98%
85%
Adequate Spectral Doppler Signals
Feasibility
With
Contrast
Tramarin Eur Heart J 1991;12:102-112
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PA Systolic Pressure
TR Jet Method
• Feasibility high – TR present in >85% normals
• Incidence higher in pulmonary hypertension
• If TR jet trivial or absent, can enhance TR
• Or use alternative methods . . .
velocity signal with agitated saline or echo-
contrast agents (eg Definity, Optison)
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GUIDELINES AND STANDARDS
Guidelines for the Echocardiographic Assessment of
The Right Heart in Adults: A Report from the American
Society of Echocardiography
J Am Soc Echocardiogr 2010;23(7):685-713
Lawrence G. Rudski, MD, FASE, Chair, Wyman W. Lai, MD, MPH, FASE, Jonathan Afilo, MD, Msc,
Lanqi Hua, RDCS, FASE, Mark D. Handschumacher, BSc, Krishnaswamy Chandrasekaran, MD, FASE,
Scott D. Solomon, MD, Eric K. Louie, MD, and Nelson B. Schiller, MD
Endorsed by the European Association of Echocardiography, a registered
Branch of the European Society of Cardiology, and the Canadian Society of
Echocardiography
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Rudski J Am Soc Echocardiogr 2010;23:685-713
Guidelines for the Echocardiographic Assessment
of the Right Heart in Adults (ASE, EAE, ESC, CSE)
Recommendations: “Pulmonary hemodynamics are
feasible in a majority of subjects using a variety of
validated methods. SPAP should be estimated and
reported in all subjects with reliable tricuspid regur-
gitant jets. The recommended method is by TR
jet velocity . . . “
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PAcT
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PEP
ET
AT
Pulmonary Systolic Flow Velocity Pattern
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Position of Sample Volume in Short-Axis View
For Obtaining Pulmonary Flow-Velocity Profile
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RVOT
PA
Sampling Sites in RVOT and PA
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A B C
Pulmonary Flow-Velocity Patterns
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Pulmonary Flow Velocity Profiles
140 110 70 60 60 PAcT =
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Pulmonary Flow Velocity Profile
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Pulmonary Flow Velocity Profile
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Pulmonary Flow Velocity Profile
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Normal
Borderline
Usually PHTN
Severe PHTN
120 - 140
100
<80 - 90
< 60
ms
ms
ms
ms
Pulmonary Acceleration Time
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PA mean
PA mean
PA mean
PCW
= -(0.45)(PAcT) + 79
= 80 - 1/2(PAcT)
= 90 - 0.62(PAcT)
= 57 - 0.39(PAcT)
PA Pressure Using PAcT
Regression Equations
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Mean Pulmonary Artery Pressure
PA mean = PAs + 2 x PAd
3
PA mean = 79 - 0.45 x PAcT
Normal cutoff value for invasively
measured mean PA pressure = 25 mm Hg
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Pulmonary Acceleration Time
Limitations/Pitfalls
Waveform varies in different parts of PA
Peak not always clearcut
Poor RV function may decrease PAcT
Inversely related to heart rate
•
•
•
•
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PAcTc = PAcT x 75/HR
Pulmonary Artery Acceleration Time
Correction for Heart Rate
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Time to Peak Velocity (TPV) in
4 Sites in Pulmonary Artery
Panidis Am J Cardiol 58:1145(1986)
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Pulmonary Artery Flow Velocity Profile
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Simple visual assessment of the
RV outflow tract Doppler pattern
provides powerful insight into the
hemodynamic basis of PHTN !
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Echo Differentiation of PAH vs PVH
RV size
LA size
RA/LV size
Atrial septum
RVOT notching
E/A ratio
Lateral e’ velocity
Lateral E/e’
Enlarged
Small
Increased
Bows from
Common
<< 1
Normal
< 8
May be enlarged
Large
Normal
Bows from
Rare
>1
Decreased
>10
(LA>RA size)
left to right right to left
Parameter PAH PVH
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3 Patterns of Pulmonary Flow-Velocity Curves
A. Dome-like, max velocity in mid-systole, no notching
B. Distinct notch in mid portion
C. Triangular contour, sharp peak in early systole, late systolic notch
A B C
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No notch Mid-systolic notch
Late-systolic notch
RV Outflow Tract Flow Velocity
3 Distinct Patterns
Forfia - Hospital of the University of Pennsylvania
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No notch Mid-systolic notch
Late-systolic notch
RV Outflow Tract Flow Velocity
3 Distinct Patterns
Forfia - Hospital of the University of Pennsylvania
• L-heart congestion
• PH largely 2º PCW
• Absence of significant
pulm vasc disease
• Markedly elevated PVR
• Low PA compliance
• RV dysfunction
• Intermediate PVR
• Mod pulm vasc disease
• Mod L-heart congestion
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Pulmonary Hypertension Cohort
Pu
lm V
as
c R
es
ista
nc
e
(Wo
od
un
its)
P<0.0001
P<0.0001
P=0.007
Differences among 3 RVOT velocity patterns
Arkles . . . Forfia Am J Resp Crit Care Med 2011;183:268-276
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Pulmonary Hypertension Cohort
TA
PS
E
(cm
)
P<0.02
P=0.13
Differences among 3 RVOT velocity patterns
Arkles . . . Forfia Am J Resp Crit Care Med 2011;183:268-276
P<0.0001
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PAPs (mm Hg)
PAPm (mm Hg)
PVR (WU)
E/A
PAcT (ms)
RA (cm)
53 ±16
33 ± 10
3.3 ± 2.4
1.9 ± 1.1
113 ±29
4 ± 0.8
73 ± 19
46 ± 12
5.7 ± 3.1
1.1 ± 1.4
79 ± 18
4.5 ± 1.5
82 ±17
50 ± 9
9.2 ± 3.5
1.0 ± 0.9
67 ± 21
4.9 ± 1.0
Hemodynamic and Echo Data for Notch Groups
(Mean ± SD)
Parameter NN LSN MSN
Arkles . . . Forfia Am J Resp Crit Care Med 2011;183:268-276
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PR Jet
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RV
RA
LA
PV
PA
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Pulmonic Regurgitant Jet
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1.4 m/s
0
1.0
2.0
3.0
PA - RV EDP EDP
PA EDP
PA EDP
4V PI
2
4V PI
2
4V PI
2
RV EDP
RA EDP
+
+
=
=
=
=
=
=
4(1.4) 2
7.8 + 4
12 mmHg
PR m/s
Doppler Recording of Pulmonic Regurgitant Jet
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TR jet
PR jet
Feasibility
Without
Contrast
94%
80%
98%
85%
Adequate Spectral Doppler Signals
Feasibility
With
Contrast
Tramarin Eur Heart J 1991;12:102-112
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Case
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Prognosis
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Prognosis in Pulmonary Hypertension
Echo Predictors
• RV systolic pressure (TR jet method)
• Size of pericardial effusion
• RA area index
• RV area index
• RV index of myocardial performance (RIMP)
• TAPSE
• Pulmonary vascular capacitance
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Forfia Am J Respir Crit Care Med 2006;174:1034-41
0 6 12 18 24
0.00
0.25
0.50
0.75
1.00
Months
Pro
babili
ty o
f S
urv
ival
p = 0.009
TAPSE ≥ 1.8 cm
TAPSE < 1.8 cm
Survival in Pulmonary Hypertension
Stratified by TAPSE Values
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Final Examination
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Case
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3.5 m/s
If RA pressure = 10 mm Hg, what is RV syst. pressure ?
Max PG = 49 mm Hg
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4.4 m/s
RVSP = 77 + 10 = 87 mm Hg
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