Rate Control in Atrial Fibrillation with Gross Volume Overload

Rationale and Evidence

• The American College of Cardiology recommends that intravenous nondihydropyridine calcium channel antagonists, intravenous beta blockers, and dronedarone should not be administered to patients with decompensated heart failure (Class III: Harm) 4, 5, 2
• The American Heart Association notes that these medications can worsen hemodynamic instability in patients with overt congestion and volume overload due to their negative inotropic effects 1, 2
• The American College of Cardiology states that volume overload with decompensation represents a state where the heart's contractility is already compromised, and rate-controlling agents may further reduce cardiac output 5, 6

Alternative Approaches for Patients with Volume Overload

• The American College of Cardiology recommends intravenous digoxin or amiodarone to control heart rate acutely in patients with heart failure (Class I recommendation) 5, 2, 3
• The American Heart Association notes that digoxin is effective for controlling resting heart rate in patients with heart failure with reduced ejection fraction without the significant negative inotropic effects of beta blockers or calcium channel blockers 2, 7
• The American College of Cardiology states that intravenous amiodarone can be useful to control heart rate in patients with atrial fibrillation when other measures are unsuccessful or contraindicated (Class IIa recommendation) 5, 2

Management Algorithm for AF with Gross Volume Overload

• The American College of Cardiology recommends that if a patient is hemodynamically unstable, immediate electrical cardioversion should be considered 3
• The American Heart Association notes that for patients with overt congestion/gross volume overload, intravenous beta blockers and calcium channel blockers should be avoided 1, 2
• The American College of Cardiology states that intravenous digoxin should be considered as first-line therapy for patients with overt congestion/gross volume overload 5, 2

Special Considerations

• The American Heart Association recommends that for patients with AF and rapid ventricular response causing or suspected of causing tachycardia-induced cardiomyopathy, rate control should be achieved by either AV nodal blockade or a rhythm-control strategy once volume status is optimized 3, 9
• The American College of Cardiology states that in patients with chronic heart failure who remain symptomatic from AF despite a rate-control strategy, a rhythm-control strategy may be reasonable after addressing volume overload 3, 7

Pitfalls to Avoid

• The American College of Cardiology warns that administering beta blockers or calcium channel blockers to patients with decompensated heart failure and volume overload can precipitate cardiogenic shock 2, 3
• The American Heart Association notes that delaying diuresis while focusing solely on rate control may worsen outcomes 8, 9
• The American College of Cardiology states that overlooking the possibility of tachycardia-induced cardiomyopathy, which may require a different management approach once volume status is optimized, should be avoided 3, 9
• The American Heart Association recommends that rate control strategy should be reassessed after resolution of the acute volume overload 5, 2