Application of multipoint electrodes to telemetry in patient-monitoring and during physical exercise.

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Abstract
An experimental dry multipoint chest electrode requiring no skin preparation with electrode jelly or paste was used successfully in a preliminary study of patient-monitoring in cardiac infarction by radio-telemetry and for the assessment of cardiac status during physical exercise. The equipment used and the methods employed are described. The battery-operated British telemetry system, which may be purchased for less than the cost of a modern single-channel ecg, will permit intermittent monitoring for about 50 hr. and, when used continuously, for approximately 10 hr. Batteries which are inexpensive may be quickly replaced. Patient-monitoring by telemetry should replace current methods which may increase the emotional tension and anxiety of seriously ill patients already predisposed by cardiac infarction to dangerous cardiac dysrhythmias, and at the same time render emergency treatment at the bedside difficult. Radio-telemetry is obligatory for the ecg assessment of cardiac function during physical exercise which precludes the use of conventional ecg, and is of value in helping to establish more valid criteria which will assist the investigation of cardiovascular disease.