ace ace inhibitors and arbs in heart failure -what does the evidence say?
TRANSCRIPT
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ACE Inhibitor and ARBs in Heart Failure – What does the evidence say ?
Syed Raza
Awali Hospital
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Objectives
1.Management issues in Heart Failure.
2.Role of ACEI and ARBs.
3.Landmark trials in Heart Failure using ACEIs and ARBs.
4.Comparative data (based on evidence)
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Heart Failure : Complex Issues
• High Mortality• High re-admission rates• On-going symptoms• Reduced Quality of Life• Poor understanding of disease• Poor Rx adherence• Dose Adjustments in the Elderly
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Rational for Medications(Why does my doctor have me on so many pills??)
• Improve Symptoms– Diuretics (water pills)– Digoxin– Ivabradine
• Improve Survival– Beta-blockers– Ivabradine– ACE-inhibitors– Angiotensin receptor
blockers (ARB’s– Aldosterone blockers
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RAAS System
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ACEI and ARB : Mechanism of Action in HF
• Vasodilatation : reduce cardiac preload and after load and thereby improve systolic function and increase cardiac output.
• Facilitate salt and water excretion by complex effects on the kidney (attenuation of Aldosterone effect.)
• ACE inhibitors and ARBs reduce LVH , myocardial fibrosis and stiffness.
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Pharmacological Therapy for Management of Stage C HFrEF
Recommendations COR LOE
Diuretics
Diuretics are recommended in patients with HFrEF with fluid retention I C
ACE Inhibitors
ACE inhibitors are recommended for all patients with HFrEF I A
ARBs
ARBs are recommended in patients with HFrEF who are ACE inhibitor intolerant I A
ARBs are reasonable as alternatives to ACE inhibitor as first line therapy in HFrEF IIa A
The addition of an ARB may be considered in persistently symptomatic patients with HFrEF on GDMT
IIb A
Routine combined use of an ACE inhibitor, ARB, and aldosterone antagonist is potentially harmful III: Harm C
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Drugs Commonly Used for HFrEF Drug
Initial Daily Dose(s)
Maximum Doses(s)
Mean Doses Achieved in Clinical Trials
ACE InhibitorsCaptopril 6.25 mg 3 times 50 mg 3 times 122.7 mg/d (421)Enalapril 2.5 mg twice 10 to 20 mg twice 16.6 mg/d (412)Fosinopril 5 to 10 mg once 40 mg once ---------Lisinopril 2.5 to 5 mg once 20 to 40 mg once 32.5 to 35.0 mg/d (444)Perindopril 2 mg once 8 to 16 mg once ---------Quinapril 5 mg twice 20 mg twice ---------
Ramipril 1.25 to 2.5 mg BD 5 mg BD ---------
Trandolapril 1 mg once 4 mg once ---------ARBsCandesartan 4 to 8 mg once 32 mg once 24 mg/d (419)
Losartan 25 to 50 mg once50 to 150 mg
once129 mg/d (420)
Valsartan 20 to 40 mg twice 160 mg twice 254 mg/d (109)Aldosterone Antagonists
Spironolactone 12.5 to 25 mg once
25 mg once or twice
26 mg/d (424)
Eplerenone 25 mg once 50 mg once 42.6 mg/d (445)
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Betablocker
Mineralocorticoidreceptor
antagonist
Drugs That Reduce Mortality in Heart Failure With Reduced Ejection Fraction
ACEinhibitor
Angiotensinreceptorblocker
Drugs that inhibit the renin-angiotensin system have modest effects on
survival
Based on results of SOLVD-Treatment, CHARM-Alternative,COPERNICUS, MERIT-HF, CIBIS II, RALES and EMPHASIS-HF
10%
20%
30%
40%
0%
% D
ec
rea
se in
Mo
rtal
ity
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ACE Inhibitors are the Cornerstone of Rx in CHF
CCS 2003 Consensus HF Update (draft)
• ACE I Rx ASAP post MI– Continue indefinitely if EF < 40% or clinical HF– Rx for all asymptomatic patients with LVEF ≤ 35%– Rx for all symptomatic patients with LVEF ≤ 35%– Target dose use in clinical trials or max tolerated
dose
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253 pts NYHA cl 4
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SOLVD(Studies of Left Ventricular
Dysfunction)• Enalapril vs placebo in 4228 patients• Ejection fraction < 35%• End points include:
– Delaying the progression of heart failure
– Improving signs and symptoms
– Reducing mortality
• Treatment arm - 2,111 (Enalapril 2.5 -40 mg)• Placebo - 2117
• FU : av 37.4 months
N Engl J Med 1991:325:293-302N Engl J Med 1991:325:293-302
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SOLVD Treatment TrialSOLVD Treatment TrialCV Mortality or Hospitalization for CHFCV Mortality or Hospitalization for CHF
0
10
20
30
40
50
60
70
0 6 12 18 24 30 36 42 48
Months
Eve
nts
%
Placebo
Enalapril
N Engl J Med 1991;325:293-302N Engl J Med 1991;325:293-302
26% Risk Reduction26% Risk Reductionp<0.0001p<0.0001
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-27% RR
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ARB(angiotensin 2 antagonist)ELITE (evaluation of losartan in elderly)
•ELITE 1 (Lancet 1997) – •Losartan showed less morbidity & mortality than captopril. •Death & hospitalisation for heart failure 9.4% (losa.) Vs 13.2% (capt) NNT 26
Elite 2 (lancet 2000)•No significant diff in mortality and hospitalization.•Insufficient data to recommend ARB as 1st line Rx
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Val-HeFT : Study Overview
5010 patients ≥18 years; EF <40%; NYHA II-IV; LVIDd >2.9 cm/m2
ACE inhibitors, diuretics,digoxin, β-blockers
Valsartan40 mg bid titrated to
160 mg bid
Randomized to
Receiving background therapy
Placebo
Cohn JN et al. Eur J Heart Fail. 2000;2:439-446.
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Effect of Valsartan on Combined Morbidity/Mortality Endpoint*
Months
3 6 9 12 15 18 21 24 270
65
70
75
80
85
90
95
100
Probability of Event-Free
Survival
0
*All-cause mortality, sudden death with resuscitation, hospitalization for worsening heart failure, or therapy with IV inotropes or vasodilators.
Cohn JN et al. N Engl J Med. 2001;345:1667-1675.
30
ValsartanPlacebo
P = 0.00913.2% Risk Reduction
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HF = heart failure. Cohn JN et al. N Engl J Med. 2001;345:1667-1675.
3 6 9 12 15 18 21 24 270
65
70
75
80
85
90
95
100
Months
Event-Free Probability
P < 0.001
27.5% Risk Reduction
0
ValsartanPlacebo
HF-Related Hospitalizations*
30
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CHARM Programme
n=3025
LVEF >40% ACE inhibitor
treated/not treated
CHARM Added
CHARMPreserved
3 component trials comparing7,601 patients with heart failure
Follow up min 2 yearsCandesartan (4 or 8 mg/day, titrated to target dose of 32 mg) to placebo
CHARMAlternative
n=2028
LVEF ≤40%ACE inhibitor
intolerant
n=2548
LVEF ≤40%ACE inhibitor
treated
Primary outcome:CV death or CHF hosp
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CHARM Overall Program
23.3%24.9%
0%
10%
20%
30%
Candesartan Placebo
All-cause mortalityHR 0.91
95% CI 0.83-1.00p=0.055
30.2%
34.5%
0%
10%
20%
30%
40%
Candesartan Placebo
European Society of Cardiology 2003
CV Mortality orCHF Hospitalization
HR 0.84p<0.0001
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CHARM-Alternative: Primary outcome CV death or CHF hospitalisation
0 1 2 3 years0
10
20
30
40
50
Placebo
Candesartan
%
HR 0.77 (95% CI 0.67-0.89), p=0.0004Adjusted HR 0.70, p<0.0001
Number at risk
Candesartan 1013 929 831 434 122
Placebo 1015 887 798 427 126
3.5
406 (40.0%)
334 (33.0%)
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CHARM Alternative Trial
33.0%
40.0%
0%
10%
20%
30%
40%
50%
Candesartan Placebo
CHF hospitalizationHR 0.77p=0.0004
21.6%
24.8%
0%
10%
20%
30%
Candesartan Placebo
European Society of Cardiology 2003
CV MortalityHR 0.85p=0.072
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CHARM Added Trial
37.9%
42.3%
0%
10%
20%
30%
40%
50%
Candesartan Placebo
CHF hospitalizationHR 0.85p=0.011
23.7%
27.3%
0%
10%
20%
30%
Candesartan Placebo
European Society of Cardiology 2003
CV MortalityHR 0.84p=0.02
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Diovan Avapro Cozaar Atacand Micardis Teveten(valsartan) (irbesartan) (losartan) (candesartan (telmisartan) (eprosartan)
cilexetil)
Reduction in -45% -6% -35% -30% N/a N/a microalbumin-uria withstarting dose
Heart failure -27.5% N/a -8.1% -17% N/a N/a hospitaliza- (ValHeFT) (ELITE II) (CHARM) tions
CV outcome in -13.3% N/a +7% -15% N/a N/a CHF-treated (ValHeFT) (ELITE II) (CHARM) patients
Positive CV Yes N/a No Yes N/a N/a outcomes inCHF
Equivalent Yes N/a No N/a N/a N/a Efficacy to ACEipost MI
Evidence for Various ARBs
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Study Design
- Age ≥ 65 years
- LVEF ≥ 40%
- Absence of exclusion criteria
SCREENINGafter AMI
Perindopril or placebo RANDOMISATION(within 20 days from AMI and after at least 24 hours of ACE-I wash-out)
FOLLOW-UP Month 1
Month 3
Month 6: ECHO
Month 9
Month 12: ECHO
8 mg
4 mg
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RemodellingIncidence of remodelling (mean ± SD) defined as an increase ≥ 8% of the LVEDV
p < 0.001
% in
cid
ence
(+
/-95
% C
I)
0.0
20.0
40.0
60.051.2%
Perindopril(N = 455)
Placebo(N = 441)
27.7%
RRR=46%
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Perindopril significantly reduces death-hospitalisation
for heart failure-cardiac remodelling by 38%
Coversyl better Placebo better RRR (%)
Total mortality 0
Hospitalisation for HF
Remodelling
27
46
Death and HF 38
P
0.90
0.24
<0.001
<0.001
0.0 1.0 2.0
Primary end point
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Perindopril 10 mg added to aspirin, β-blocker, and statin
-35-35
-15-15
-20-20
-10-10
-5-5
00
CV death, MI, orcardiac arrest
Nonfatal MI
Stable CAD patientsStable CAD patients
Hospitalizationfor heart failure
-25-25
-30-30
-40-40
-20%P=0.0003 -22%
-39%
Fox K; EUROPA Investigators. The EUROPA study. Fox K; EUROPA Investigators. The EUROPA study. LancetLancet. 2003;362:782-788. . 2003;362:782-788.
12 218 12 218
stable CAD patients stable CAD patients
without heart failurewithout heart failure
12 218 12 218
stable CAD patients stable CAD patients
without heart failurewithout heart failure
Active cardiovascular risk reductions
P=0.002
P=0.001
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Mortality benefit in preserved EF
HFpEF HFrEF
Aldosterone antagonists
ACE inhibitors
ARBs
β-blockers
Vasodilators??
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Assessment Question #1• Which treatments have been shown to
decrease mortality in patients with HFpEF?
A. ACE inhibitors/ARBs
B. β-blockers
C. Aldosterone antagonists
D. All of the above
E. None of the above
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Assessment Question #1• Which treatments have been shown to
decrease mortality in patients with HFpEF?
A. ACE inhibitors/ARBs
B. β-blockers
C. Aldosterone antagonists
D. All of the above
E. None of the above
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ACE inhibitors/ARBs in HFpEF
• No mortality benefit in HFpEF from prospective trials
• ACEI and ARBs decrease symptoms and hospitalization.
• Heart failure guidelines
– First line medication for hypertension management in HFpEF
- Utilize in presence of co-morbidities (diabetes, CAD, CKD)
Eur Heart J 2012;33:1787-1847.Circulation 2013;128:e240-327.
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PEP-CHF Trial – Perindopril compared to placebo in 850
symptomatic HFpEF patients (EF > 40%)– Non-significant difference in mortality or HF
hospitalizations with perindopril (23.6% vs 25.1%)
– Perindopril significantly improved symptoms and exercise capacity
– Conclusion: ACE inhibitor improved HFpEF symptoms but had no reduction in mortality or HF hospitalizations
Eur Heart J 2006;27:2338-45.
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CHARM-preserved• Candesartan compared to placebo in 3,023
symptomatic HFpEF patients (EF > 40%)
• Significant decrease in HF hospitalizations with ARB (15% vs. 18%)
• No difference in mortality (11% for each treatment)
• Conclusion: No mortality benefit with use of an ARB in HFpEF but mild impact in preventing HF hospitalizationLancet 2003;362:777-81.
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CHARM Preserved Trial
22.0%24.3%
0%
10%
20%
30%
Candesartan Placebo
CHF hospitalizationHR 0.89p=0.118
11.2% 11.3%
0%
5%
10%
15%
Candesartan Placebo
European Society of Cardiology 2003
CV MortalityHR 0.99p=0.918
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I-preserve
• Symptomatic HFpEF patients (EF > 45%) who were > 60 years were randomized to Irbesartan or placebo (N = 4,128)
• No difference in composite primary endpoint of death or cardiovascular hospitalization between groups (36% vs. 37%)
• Conclusion: No benefit in terms of mortality and hospitalization.
N Engl J Med 2008;359:2456-67.
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Summary
• ACE inhibitors form the corner stone of management of HF with reduced EF.
• Most guidelines recommend use of ARBs in patients who are intolerant to ACEIs.
• ARBs are generally shown to be better tolerated.• ACE inhibitors after an MI improve survival, rates of
hospitalization, symptoms, cardiac output and promote reverse remodeling.
• Not certain whether any difference among the many different ACE inhibitors out there today
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Thank you…