counterpulsation

noun
coun·ter·pul·sa·tion | \-ˌpəl-ˌsā-shən \

Medical Definition of counterpulsation 

: a technique for reducing the workload on the heart by lowering systemic blood pressure just before or during expulsion of blood from the ventricle and by raising blood pressure during diastole — see intra-aortic balloon counterpulsation

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