Timing of Electrical and Mechanical Events of the Left Side of the Human Heart
- 1 November 1955
- journal article
- research article
- Published by American Physiological Society in Journal of Applied Physiology
- Vol. 8 (3) , 309-314
- https://doi.org/10.1152/jappl.1955.8.3.309
Abstract
Temporal relationships between electrical and mechanical events and the duration of individual phases of the cardiac cycle of the left side of the human heart were measured in 14 patients by direct needle puncture of the chambers at operation. The interval between onset of the P wave to onset of left atrial contraction averaged 0.068 seconds. The interval from the onset of the Q wave in lead n to the onset of left ventricular contraction averaged 0.041 seconds. The isometric contraction period of the left ventricle averaged 0.50 seconds in the 14 patients studied.Keywords
This publication has 5 references indexed in Scilit:
- The Hemodynamics of the Left Side of the Heart as Studied by Simultaneous Left Atrial, Left Ventricular, and Aortic Pressures; Particular Reference to Mitral StenosisCirculation, 1955
- Simultaneous Pressure Pulses in the Human Left Atrium, Ventricle and Aorta: Preliminary CommunicationCirculation Research, 1954
- Measurement of Pressures in Man by Cardiac CathetersCirculation Research, 1954
- A Technic of Vascular Catheterization with Small Plastic CathetersCirculation, 1952
- THE RELATIONSHIP BETWEEN ELECTRICAL AND MECHANICAL EVENTS IN THE CARDIAC CYCLE OF MANHeart, 1949