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| Autor/in | Franks, B. Don |
|---|---|
| Titel | Time Components of the Left Ventricle. |
| Quelle | (1975), (20 Seiten)
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| Dokumenttyp | gedruckt; online; Monographie |
| Schlagwörter | Blood Circulation; Cardiovascular System; Heart Rate; Human Body; Physical Health; Physiology |
| Abstract | The purpose of this study was to examine the relationship of the time components of the left ventricle. Since one of the ways to investigate cardiac function is to analyze the time intervals between particular events of the cardiac cycle, various time intervals of systole and diastole of the left ventricle were measured from simultaneous recordings of the electrocardiogram, phonocardiogram, cartoid pulse wave, and apex cardiogram. The relationship of the time components was determined by factor analysis. The results showed that the six nonoverlapping intervals, which included the (1) isovolumetric relaxation phase, (2) rapid filling phase, (3) slow filling phase, (4) electromechanical lag, (5) isovolumetric contraction phase, and (6) ejection phase, are relatively independent of each other and of cycle time (with the exception of the slow filling phase). They reflect the factors that account for the variance of all the time components of the left ventricle. These relationships among the intervals appear to be similar for different ages and sex. (RC) |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
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