Abstract
A number of systolic time intervals (STI) can be distinguished during the cardiac cycle. The left ventricular ejection time (LVET) is the time difference between the onset of the rapid-rise portion of the carotid pulse tracing (CP) and the dicrotic notch. The total electromechanical systole (QS2) is defined as the time difference between the onset of the Q wave in the electrocardiogram (ECG) and the first high-frequency vibration of the aortic component of the second heart sound in the phonocardiogram (PCG). The pre-ejection period (PEP) is defined as the difference between QS2 and LVET. The pulse transmission time (PTT) is defined as the time difference between the second heart sound in the PCG and the dicrotic notch in the CP.
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Van der Hoeven, G.M.A., Clerens, P.J.A., de Monchy, C. (1980). Systolic Time Intervals Obtained During Various Interventions. In: List, W., Gravenstein, J.S., Spodick, D.H. (eds) Systolic Time Intervals. International Boehringer Mannheim Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-46418-8_20
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DOI: https://doi.org/10.1007/978-3-642-46418-8_20
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