isovolumetric
adjective
iso·vol·u·met·ric
| \ ˌī-sə-ˌväl-yu̇-ˈme-trik
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Medical Definition of isovolumetric
: of, relating to, or characterized by unchanging volume
especially
: relating to or being an early phase of ventricular systole in which the cardiac muscle exerts increasing pressure on the contents of the ventricle without significant change in the muscle fiber length and the ventricular volume remains constant