The influence of heart rate and age on the systolic and diastolic time intervals in children.
نویسندگان
چکیده
The systolic time intervals have been measured in 76 normal children, aged 1 month to 15 years, from simultaneous recordings of the electrocardiogram, phonocardiogram and carotid arterial pulse or apexcardiogram (left or right). Four different statistical methods were applied to study the separate influence of heart rate (HR) and age on these intervals. Left ventricular ejection time (LVET) had a highly significant correlation with HR but none with age. Age alone had a slight but significant influence on pre-ejection period (PEP) and isometric contraction time (ICT). Electromechanical systole (Q-II) varied directly with
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ورودعنوان ژورنال:
- Circulation
دوره 49 6 شماره
صفحات -
تاریخ انتشار 1974