Tachycardia Management Guidelines

Introduction to Tachycardia Treatment

The American Heart Association recommends that the best medication for tachycardia depends critically on the type of tachycardia and hemodynamic stability, with adenosine being first-line for narrow-complex supraventricular tachycardia (SVT) after vagal maneuvers, beta-blockers or diltiazem for atrial fibrillation with rapid ventricular response, and amiodarone combined with beta-blockers for wide-complex ventricular tachycardia 1, 2, 3

The American College of Cardiology suggests that before selecting any medication, it is crucial to determine if the patient is hemodynamically unstable, and if so, synchronized cardioversion is the treatment of choice regardless of tachycardia type, not medication 1, 2, 4

For supraventricular tachycardia (SVT), the European Society of Cardiology recommends first attempting vagal maneuvers, which succeed in approximately 28% of cases 5
Adenosine is the first-line pharmacological agent for SVT, with a 6 mg rapid IV bolus followed by saline flush, then 12 mg if no response after 1-2 minutes, and it terminates approximately 95% of AVNRT cases 4, 5, 6
The American Heart Association suggests that beta-blockers and diltiazem are the drugs of choice for acute rate control in atrial fibrillation with rapid ventricular response 1, 2

For monomorphic ventricular tachycardia (VT), the American College of Cardiology recommends amiodarone combined with beta-blockers as first-line treatment for hemodynamically stable VT 3
Procainamide is recommended for stable monomorphic VT without severe heart failure or acute MI, with a loading dose of 20-30 mg/min up to 12-17 mg/kg, then 1-4 mg/min infusion 1, 2, 3

The European Society of Cardiology suggests that intravenous beta-blockers, specifically propranolol, are reasonable first-line treatment for junctional tachycardia, terminating or reducing tachycardia in approximately 30-50% of patients 4, 8

The American Heart Association warns to never use verapamil or diltiazem in suspected VT or pre-excited atrial fibrillation, as they may cause hemodynamic collapse 5, 6
Digoxin should be avoided for chemical cardioversion of atrial fibrillation, as it has no role and may perpetuate AF 1, 2