An ambulatory monitoring system using a modified Holter monitor successfully recorded systolic time intervals consistent with literature values in four subjects over several hours.
A modified Holter monitor can successfully record ambulatory systolic time intervals, providing values consistent with established literature.
A system for ambulatory monitoring of systolic time intervals has been developed. This objective was accomplished by adaptation of a standard two-channel, long-term electrocardiogram monitoring unit (Holter Monitor) in which the second channel was modified to record a pulse tracing, while the first channel recorded a bipolar V5 ECG. The pulse tracing used was a derived ear densitogram singal. From the two-channel printout, measurements of pre-ejection period and left ventricular ejection time could be computed, as long as pulse transmission time was prerecorded. Systolic time interval measurements were recorded on four subjects for several hours. The values of systolic time intervals obtained and the changes in systolic time intervals on each subject were consistent with those reported in the literature.
Haffty et al. (Fri,) reported a other. Ambulatory systolic time interval monitoring system was evaluated on Systolic time intervals (pre-ejection period and left ventricular ejection time). An ambulatory monitoring system using a modified Holter monitor successfully recorded systolic time intervals consistent with literature values in four subjects over several hours.