Vol 18, No 5 (2011)
Interesting electrocardiograms
Published online: 2011-09-21

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Tachycardia-induced cardiomyopathy caused by a special pacemaker algorithm

Amardeep Ghosh Dastidar, Paul Sheridan
Cardiol J 2011;18(5):573-576.


An elderly lady presented with breathlessness, fever and palpitations. She was treated for community-acquired pneumonia with antibiotics. Subsequently, she went into acute pulmonary edema. She was managed with standard heart failure medications and a trial of noninvasive ventilation. ECG showed A-V sequential pacing at a rate of 150/min with broad QRS. It was thought to be a pacemaker-related tachycardia. On pacemaker check, a special algorithm (atrial fibrillation suppression algorithm) was switched off. She subsequently improved. We here review the cause of this tachycardia-induced cardiomyoapthy.
(Cardiol J 2011; 18, 5: 573–576)

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