Pacemaker failure resulting from radiation damage.

Abstract
A [human] case of radiation-induced pacemaker failure is presented. After 2000 rad (20 Gy [gray]) of photon irradiation for metastatic bronchogenic carcinoma, the pulse generator circuitry failed, producing a runaway rhythm. Present pacemaker circuitry may be more susceptible to irradiation than previously believed, and even modest radiation doses can induce life-threatening arrhythmias.

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