Telemetric evaluation of the atrioventricular conduction system.

A telemetric method was developed to record His-bundle ECG. With this technique the His-potential of ambulatory patients could be continuously monitored. The heart rate, AH intervals and HV intervals were recorded at rest, during exercise and during atrial pacing in ten patients with various arrhythmias. It was found that atrial pacing increased, and exercise, at comparable rates, decreased the AH intervals. The HV intervals did not change. The telemetric method is useful in dynamic evaluation of the atrioventricular conduction system in the clinical practice.