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Supraventricular arrhythmia

Last edited: 4/16/2026

Overview

Supraventricular arrhythmias encompass a range of abnormal heart rhythms originating above the ventricles, including atrioventricular nodal reentrant tachycardia (AVNRT) and Wolff-Parkinson-White (WPW) syndrome with accessory pathways. These conditions often require electrophysiological studies and catheter ablation for definitive treatment 1.

Diagnosis

  • Clinical Presentation: Recurrent supraventricular tachycardias, syncope, wide QRS tachycardia 1.
  • Electrocardiogram (ECG): Essential for identifying tachycardia type, presence of delta waves in WPW syndrome 1.
  • Electrophysiological Studies: Confirm diagnosis and map pathways for ablation 1.
  • Management

  • First-Line Treatment: Antiarrhythmic drugs such as class Ic (e.g., flecainide) or class III (e.g., amiodarone) for symptomatic control 1.
  • Catheter Ablation: Recommended for recurrent or refractory cases, particularly effective for AVNRT and WPW syndrome 1.
  • Adjunctive Therapies: Beta-blockers or calcium channel blockers for rate control in acute episodes 1.
  • Special Populations

  • Pregnancy: Limited data; management focuses on minimizing teratogenic risks while controlling arrhythmias 1.
  • Pediatrics: Catheter ablation is increasingly used with favorable outcomes in children with WPW syndrome 1.
  • Elderly: Careful consideration of comorbidities; catheter ablation remains a viable option for refractory cases 1.
  • Comorbidities: Tailored approach considering heart failure, renal function, and other systemic conditions affecting drug choice and procedural risks 1.
  • Key Recommendations

  • Catheter Ablation for Recurrent SVT: Effective and recommended for patients with recurrent supraventricular tachycardias, particularly AVNRT and WPW syndrome (Evidence: Moderate) 1.
  • Electrophysiological Studies for Diagnosis: Essential for definitive diagnosis and planning of catheter ablation procedures (Evidence: Moderate) 1.
  • Antiarrhythmic Drugs for Symptomatic Control: Use class Ic or III antiarrhythmics for acute management of symptoms (Evidence: Weak) 1.
  • References

    1 Shafquat A, Imdad A, Khalid S, Jamal SZ. Cardiac electrophysiology studies and ablations for treatment of supraventricular arrhythmias--an initial experience from Karachi. JPMA. The Journal of the Pakistan Medical Association 2011. link

    Original source

    1. [1]
      Cardiac electrophysiology studies and ablations for treatment of supraventricular arrhythmias--an initial experience from Karachi.Shafquat A, Imdad A, Khalid S, Jamal SZ JPMA. The Journal of the Pakistan Medical Association (2011)

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