What are the preferred drugs for rate control in atrial fibrillation and when is rhythm control preferred?

1 Answer

Rate Control in Atrial Fibrillation: For your patient (no structural heart disease, HR 130, mildly symptomatic): 1st Line Rate Control Drugs: - Beta-blockers (Metoprolol, Bisoprolol): Preferred in most patients; good for sympathetically-driven AF (exercise, stress) - Non-dihydropyridine CCBs (Diltiazem, Verapamil): Good alternative; avoid in HFrEF (negative inotropy) - Digoxin: 3rd line; better for rest HR than exercise HR; useful in HFrEF Rate Targets: - Lenient control: HR <110 bpm at rest (RACE II trial shows acceptable) - Strict control: HR <80 bpm at rest (consider if symptomatic with lenient) When to Choose Rhythm Control: - Young patient (<65) with first episode AF - Symptoms persist despite rate control - AF precipitating HF (tachycardia-induced cardiomyopathy) - Patient preference - EAST-AFNET trial: early rhythm control may reduce cardiovascular outcomes For new-onset AF <48 hours: Can cardiovert directly For AF >48 hours: Anticoagulate for 3 weeks before cardioversion OR TEE to exclude LAA thrombus For your patient: Start IV/oral Metoprolol for rate control, assess stroke risk (CHA2DS2-VASc), start anticoagulation if score ≥2.