The development of an analog circuit enables continuous, real-time beat-to-beat analysis of AV conduction times and rhythm changes.
May enable real-time monitoring in electrophysiology labs; leaves open clinical validation before adoption.
A simple analog circuit is described which is capable of measuring on a beat-to-beat basis P-R, R-P, P-P, and R-R intervals during sinus rhythm and paroxysmal supraventricular tachycardia. In addition the circuit will emit a pulse when the consecutively alternating P and R wave sequence is interrupted thereby signalling a trigger problem or a change in rhythm. The operation of the device requires proper P and R wave sensing and provides outputs which are linear over a range of rates which are applicable to the human heart.
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Waxman et al. (1981) studied this question.
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