Medical Management of Acutely Decompensated Heart Failure · Importance of Diuretic Therapy in...
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Orlando, Florida – October 7-9, 2011
Medical Management of Acutely Decompensated Heart Failure
William T. Abraham, MDDirector, Division of Cardiovascular Medicine
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Goals of Acute Heart Failure Therapy
Alleviate symptoms
Reduce extracellular fluid volume excess (“congestion”)
Improve hemodynamics• Decrease left and right ventricular filling pressures• Increase cardiac output (?)
Maintain perfusion to vital organs
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How Do We Accomplish These Goals?
With hemodynamic interventions• Diuretics• Nitrovasodilators• Natriuretic peptides• Positive inotropic agents
Sympathomimetic agentsPhosphodiesterase inhibitorsCalcium channel sensitizers
• Mechanical interventions that improve hemodynamics
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Pharmacological Approach To Acute Heart Failure Therapy
Diuretics to reduce ECF volume• IV loop diuretics ± metolazone/thiazide
Intravenous vasodilators to reduce ventricular filling pressures• Nesiritide, nitroglycerin, nitroprusside
Intravenous inotropic agents to improve cardiac output• Sympathomimetic agents• Phosphodiesterase inhibitors
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Importance of Diuretic Therapy in Acutely Decompensated Heart Failure
Beneficial effects of diuretic therapy:• ↓ End-diastolic volume (preload)• ↓ Systemic vascular resistance
(acutely, may ↑ SVR)• ↑ Cardiac output / stroke volume• ↓ Congestive symptoms• ↑ Exercise capacity
Key to successful initiation and titration of ACE inhibitors, β-blockers, vasodilators
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LoopLoopofof
HenleHenle
CollectingCollectingDuctDuct
CortexCortex
OuterOuterMedullaMedulla
InnerInnerMedullaMedulla
AldosteroneAldosterone--sensitivesensitiveGlomerulusGlomerulus
Acetazolamide
ProximalProximalConvolutedConvolutedTubuleTubule Furosemide
Ethacrynic AcidBumetanideTorsemide
ThiazidesMetolazone
SpironolactoneTriamterene
Amiloride
Tubular Sites of Action of Commonly-used Diuretics
Abraham and Schrier, 1994
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Limitations Of Diuretic Therapy
Electrolyte abnormalities• Hypokalemia• Hypomagnesemia• Hyponatremia
Volume depletionPre-renal azotemiaHyperuricemiaDiuretic resistance
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Loop Diuretics Diminish GFR In Patients with Heart Failure
Gottlieb et al., 2000
63.4
81.5
40
50
60
70
80
90
Placebo Furosemide
Glo
mer
ular
Filt
ratio
n R
ate
(ml/m
in)
p < 0.001
n = 12
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Increased MorbidityIncreased MorbidityAnd MortalityAnd Mortality
Diuretic TherapyDiuretic Therapy
Impaired RenalImpaired RenalFunctionFunction
Decreased RenalDecreased RenalPerfusionPerfusion
DevelopmentDevelopmentOf DiureticOf DiureticResistanceResistance
DiminishedDiminishedBlood FlowBlood Flow
NeurohormonalNeurohormonalActivationActivation
The “Iatrogenic” Cardio-Renal Syndrome of Heart Failure
Abraham WT, 2004
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Ultrafiltration Fluid Removal System
FDA approvedUses peripheral venous access (can also use central access)Total extracorporeal blood volume 33 mLDesigned to remove up to 500 ml of fluid per hour with adjustable flow rates of 10-40 mL/minHighly automated, computer controlled operation with simple operator interface
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Ultrafiltration versus IV Diuretics for Patients Hospitalized for Acute Decompensated Congestive Heart Failure: A Prospective Randomized Clinical Trial
The UNLOAD Trial
Costanzo MR, et al., JACC 2007
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Primary End Point: Weight Loss at 48 Hr
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Effects on Worsening Heart Failure Over 90 days
0.0220.022330330123123Days ReDays Re--hospitalizedhospitalized
P ValueP ValueSCSCUFUF
0.0090.00944442121(Unscheduled office + ED visits) %(Unscheduled office + ED visits) %
0.0220.0223.83.81.41.4Number of ReNumber of Re--hospitalization hospitalization days/patientdays/patient
0.0370.0370.460.460.220.22ReRe--hospitalizations/patienthospitalizations/patient
0.0220.02232321818Patients RePatients Re--hospitalized %hospitalized %
0.0220.022330330123123Days ReDays Re--hospitalizedhospitalized
P ValueP ValueSCSCUFUF
0.0090.00944442121(Unscheduled office + ED visits) %(Unscheduled office + ED visits) %
0.0220.0223.83.81.41.4Number of ReNumber of Re--hospitalization hospitalization days/patientdays/patient
0.0370.0370.460.460.220.22ReRe--hospitalizations/patienthospitalizations/patient
0.0220.02232321818Patients RePatients Re--hospitalized %hospitalized %
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Intravenous Positive Inotropic Agents
Phosphodiesterase inhibitors• milrinone• enoximone
Sympathomimetics• dopamine• dobutamine• isoproterenol• epinephrine• norepinephrine
Calcium channel sensitizers• levosimendan
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Selection of an Inotropic Agent
Mehra M. Heart/Lung 1997; 26:280-288.
Dobutamine Milrinone
SBP<80 1st choice Usually incombination withpressor
Pulmonary Not a good 1st choiceHTN pulmonary lowers PVR
vasodilator
Myocardial ↑ myocardial 1st choiceischemia O2 demand ↓↔ myocardial O2
demand
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Limitations Of Positive Inotropic Therapy
Tolerance/TachyphylaxisHypotensionTachycardiaOther arrhythmias• Ventricular tachycardia• Atrial fibrillation/flutter
Increased mortality?
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IV Milrinone During Hospitalization for Decompensated Heart Failure
Cuffe MS et al. JAMA 2002; 287:1541–1547.
Eve
nt R
ate
( %)
Treatment Failure From Adverse Event (48 h)
Sustained Hypotension
Acute MI Mortality
MilrinoneMilrinonePlaceboPlacebo
Afib
P < 0.001 P < 0.001
P = 0.18
P = 0.004 P = 0.19
12.6
2.1
10.7
3.21.5
0.4
4.6
1.5
3.82.3
0
5
10
15
20OPTIME-CHF: In-hospital Adverse Events
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Hemodynamic Effects of Vasodilators
CO = cardiac output; HR = heart rate; LVFP = left ventricular filling pressure;SVR = systemic vascular resistance.
Nitroglycerin
Nitroprusside
Synthetic hBNP
HR CO LVFP SVR
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Limitations Of Nitrovasodilators
Tolerance/TachyphylaxisHypotensionToxicity• Thiocyanate• Cyanide
Vasoconstrictor activationFluid retention
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Natriuretic Peptides
Produce selective renal afferent arteriolar vasodilation
Inhibit sodium reabsorption in the collecting duct
Improve/maintain glomerular filtration
Inhibit renin and aldosterone (and possibly vasopressin and adrenergic activity)
Improve systemic hemodynamics
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The Natriuretic Peptide Family
Naturally Occurring• ANP - Atrial or A-Type Natriuretic Peptide• BNP - Brain or B-Type Natriuretic Peptide• CNP - C-Type Natriuretic Peptide• DNP - Dendroaspis or D-Type Natriuretic Peptide• Urodilatin - Extended form of ANP
Designer
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Added to standard therapy; N = 242*P<0.05 for nesiritide or placebo vs placebo† P<0.05 for nesiritide vs. nitroplycerin
Publication Committee for the VMAC Investigators. JAMA. 2002;287:1531
VMAC Trial: PCWP Through 3 Hours
Placebo
Mea
nC
hang
e in
PC
WP
(mm
Hg)
Nitroglycerin Nesiritide
–6
–5
–4
–3
–2
–1
1 2 3BL
0
Hours
* †*
* †* † * * †
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ASCEND‐HF Trial
Landmark trial presented at AHA LBCT Session November 2010
Largest RCT in ADHF (7,141 subjects)
Results clearly demonstrate the safety of natriuretic peptides in the treatment of ADHF
Unambiguously answers the critical questions raised by meta‐analyses published in 2005
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ASCEND-HF Trial: Primary Endpoint
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Investigational Strategies in ADHF
Second-Generation Natriuretic Peptides• Urodilatin• CD-NP
Relaxin
Nitroxyl Donors
Vasopressin Antagonists
Others
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Approach to Acute Therapy in Volume Overloaded Heart Failure Patients
IV Diuretics
Adequate Perfusion
IV Diureticsplus
IV Vasodilators
Reduced Perfusion
IV Diureticsplus
IV Inotropes
Cardiogenic Shock
Clinical Congestion