articleCirculationJun 4, 2003BRONZE OA

Adverse Effect of Ventricular Pacing on Heart Failure and Atrial Fibrillation Among Patients With Normal Baseline QRS Duration in a Clinical Trial of Pacemaker Therapy for Sinus Node Dysfunction

Brigham and Women's Hospital · Mount Sinai Hospital · +6 more institutions

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Abstract

Background— Dual-chamber (DDDR) pacing preserves AV synchrony and may reduce heart failure (HF) and atrial fibrillation (AF) compared with ventricular (VVIR) pacing in sinus node dysfunction (SND). However, DDDR pacing often results in prolonged QRS durations (QRSd) as the result of right ventricular stimulation, and ventricular desynchronization may result. The effect of pacing-induced ventricular desynchronization in patients with normal baseline QRSd is unknown. Methods and Results— Baseline QRSd was obtained from 12-lead ECGs before pacemaker implantation in MOST, a 2010-patient, 6-year, randomized trial of DDDR versus VVIR pacing in SND. Cumulative percent ventricular paced (Cum%VP) was determined from…

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1,765
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Authors

7

Topics & keywords

Keywords
  • Medicine
  • Cardiology
  • Heart failure
  • QRS complex
  • Internal medicine
  • Hazard ratio
  • Atrial fibrillation
  • Adverse effect
UN Sustainable Development Goals
  • Good health and well-being
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