Journal of Medical Cases, ISSN 1923-4155 print, 1923-4163 online, Open Access
Article copyright, the authors; Journal compilation copyright, J Med Cases and Elmer Press Inc
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Case Report

Volume 10, Number 4, April 2019, pages 116-119

Syncope and an Intra-Hisian Atrioventricular Block After Radiation Therapy: Electrophysiologic Observations and Review of Literature


Figure 1.
Figure 1. (a) Patient’s presenting 12-lead electrocardiogram demonstrated sinus rhythm with a narrow QRS complex. (b) Telemetry demonstrating first-degree atrioventricular block. (c) Telemetry with narrow complex tachycardia.
Figure 2.
Figure 2. (a) Baseline recording in electrophysiology study. (b) Programmed electrical stimulation from high right atrium showing development of a complete intra-Hisian block.
Figure 3.
Figure 3. Spontaneous complete intra-Hisian atrioventricular block after procainamide infusion.