Outpatient Management of Supraventricular Tachycardia

Introduction to Management

• The American College of Cardiology recommends catheter ablation as the first-line definitive therapy for outpatient management of SVT, with 94-98% success rates, while oral beta blockers or calcium channel blockers serve as suppressive therapy for patients who decline or are not candidates for ablation 1

Acute Self-Management for Patients

• Applying an ice-cold wet towel to the face can terminate SVT episodes, as recommended by the American College of Cardiology 1, 2

Long-Term Outpatient Pharmacotherapy

• The American College of Cardiology suggests oral beta blockers, diltiazem, or verapamil as reasonable suppressive options for AVNRT and AVRT without pre-excitation 1, 3
• The American Heart Association advises against using AV nodal blocking agents as monotherapy in patients with manifest accessory pathways, as these can enhance accessory pathway conduction during atrial fibrillation and precipitate ventricular fibrillation 1, 4

Definitive Management: Catheter Ablation

• Catheter ablation is particularly recommended for WPW syndrome, where there is a 0.15-0.24% 10-year risk of sudden cardiac death, according to the American Heart Association 5

Critical Safety Considerations

• The American College of Cardiology warns against using verapamil or diltiazem in wide-complex tachycardia of uncertain etiology, as this can cause hemodynamic collapse if the rhythm is ventricular tachycardia or pre-excited atrial fibrillation 1, 6
• The American Heart Association recommends avoiding AV nodal blockers in patients with known accessory pathways who develop atrial fibrillation, and instead using procainamide or ibutilide, or performing immediate cardioversion 5, 7
• The American College of Cardiology advises against using calcium channel blockers and beta blockers in patients with systolic heart failure 1, 3

When to Send to Emergency Department

• The American College of Cardiology instructs patients to seek emergency care if vagal maneuvers fail to terminate the episode within 15-20 minutes 1
• The American College of Cardiology recommends emergency care if hemodynamic instability develops, such as hypotension, altered consciousness, chest pain, or severe dyspnea 1, 8
• The American College of Cardiology advises seeking emergency care if syncope occurs during an episode 8, 9