Supraventricular premature beats

Last updated: May 16, 2022

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Supraventricular premature beats are atrial contractions triggered by ectopic foci rather than the sinoatrial node. They arise within the atria (atrial premature beats) or, through retrograde conduction, in the atrioventricular node (junctional premature beats). Premature beats may be found in healthy individuals as well as patients with underlying heart disease. Certain triggers, e.g., alcohol, smoking or electrolyte imbalances, may also contribute to the condition. Premature beats do not significantly impair cardiac output on their own; however, they may lead to more severe forms of arrhythmia such as atrial fibrillation. Unless patients exhibit severe symptoms (e.g., tachycardia), those experiencing premature beats do not require treatment.

Atrial premature beats

Junctional premature beats

  • Treatment is not required in asymptomatic individuals without underlying structural heart defects.
  • Underlying conditions, e.g., electrolyte imbalances, should be treated.
  • Symptomatic patients
  1. Herold G. Internal Medicine. Herold G ; 2014
  2. Manolis AS. Supraventricular premature beats. In: Post TW, ed. UpToDate. Waltham, MA: UpToDate. updated: July 24, 2017. Accessed: December 8, 2017.

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