Atrial lead dysfunction: an unusual feature of hypothyroidism.
Hypothyroidism is known to have a multitude of cardiac electrophysiologic effects, including bradycardia, atrioventricular block, prolonged QT interval, and elevated ventricular pacing thresholds. We report the case of a 36-year-old woman who presented with isolated dysfunction of her atrial pacemaker lead, which reversed with thyroid hormone replacement.
Patton
Kristen K
KK
Department of Medicine, Division of Cardiology, University of Washington, Seattle, Washington 98195, USA. krpatton@u.washington.edu
Levy
Matthew
M
Viswanathan
Mohan
M
D000328:Adult; D004567:Electrodes, Implanted; D004868:Equipment Failure; D005260:Female; D006325:Heart Atria; D006327:Heart Block / Q000209:etiology* / Q000517:prevention & control*; D006801:Humans; D007037:Hypothyroidism / Q000150:complications*; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D012804:Sick Sinus Syndrome / Q000517:prevention & control*