Runaway pacemaker with demonstration of supernormal period of excitation

U. R. Shettigar, R. E. Kleiger, R. Krone, A. S. Geha

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


This report documents the presence of supernormal conduction in the normal heart. A 26 yr old woman with congenital heart block treated with a fixed rate permanent pacemaker returned to the hospital with evidence of pacemaker failure. Pacemaker spikes occurred regularly at a rate of 140 per min, eliciting ventricular responses only when they occurred during the supernormal period of the cardiac cycle. Telemetric cardiac monitoring revealed complete pacemaker capture, at a rate of 140 per min when the patient was walking. Following replacement of the pulse generator, the pacemaker performed effectively.

Original languageEnglish
Pages (from-to)227-229
Number of pages3
Issue number2
StatePublished - Jan 1 1974

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