Spike on T wave! What went wrong?

J Electrocardiol. 2017 Jan-Feb;50(1):139-141. doi: 10.1016/j.jelectrocard.2016.09.009. Epub 2016 Sep 24.

Abstract

An 80-year-old male, who previously received a dual chamber pacemaker, was referred to our ambulatory for dizziness and fatigue. The ECG obtained showed sinus rhythm, highly variable atrioventricular (AV) interval and alternation between spontaneous and paced ventricular complexes. A spike on the ascending part of the T wave was observed, suggesting ventricular undersensing. However, telemetry-supported pacemaker control showed inconstant atrial undersensing.

Keywords: Atrial undersensing; Dual chamber device; R on T; Ventricular undersensing.

Publication types

  • Case Reports

MeSH terms

  • Aged, 80 and over
  • Atrioventricular Block / complications
  • Atrioventricular Block / diagnosis*
  • Atrioventricular Block / prevention & control*
  • Cardiac Pacing, Artificial*
  • Dizziness / complications
  • Dizziness / diagnosis*
  • Electrocardiography / methods*
  • Equipment Failure*
  • Fatigue / complications
  • Fatigue / diagnosis*
  • Humans
  • Male