| presphygmic interval |
The brief period between the beginning of ventricular systole and opening of the semilunar valves. SYN: isometric interval .
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| presphygmic period |
The short period in systole beginning with closing of the atrioventricular valves and ending with opening of the valves connecting the right and left ventricles to the pulmonary artery and aorta, respectively.
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