Abstract:SUMMARYWe developed a new indirect method for the measurement of sinoatrial conduction time (SACT) and the sinus node return cycle (SRC) with a transvenous catheter technique. Two early premature stimuli, at intervals 50 msec longer than the effective refractory period (ERP), were given to the right atrium. These early stimuli were followed by eight constant stimuli. The interval of the constant stimuli was a little shorter than the basic cycle length (BCL). The return cycle A1Ar was measured and plotted on th… Show more
“…It can be assumed that the normal SACT usually does not exceed 150 ms in an awake patient. SACT measurements are usually performed with various modifications of the Strauss' method [3][4][5][6]. This indirect approach involves the introduction of progressively premature atrial depolarization during a stable sinus rhythm and measurement of the first return cycle.…”
“…It can be assumed that the normal SACT usually does not exceed 150 ms in an awake patient. SACT measurements are usually performed with various modifications of the Strauss' method [3][4][5][6]. This indirect approach involves the introduction of progressively premature atrial depolarization during a stable sinus rhythm and measurement of the first return cycle.…”
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