( ( ( Cardiac output ) ( -LRB- ( ( ( blood flow ) ( measured ( in ( volume ( per ( unit time ) ) ) ) ) ) -RRB- ) ) ) ( ( is ( computed ( by ( multiplying ( ( ( ( the ( heart rate ) ) ( -LRB- ( ( in ( beats ( per minute ) ) ) -RRB- ) ) ) and ) ( ( the ( stroke volume ) ) ( -LRB- ( ( ( ( the volume ) ( of blood ) ) ( ejected ( during ( ventricular systole ) ) ) ) -RRB- ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Cardiac) (NN output)) (PRN (-LRB- -LRB-) (NP (NP (NN blood) (NN flow)) (VP (VBN measured) (PP (IN in) (NP (NP (NN volume)) (PP (IN per) (NP (NN unit) (NN time))))))) (-RRB- -RRB-))) (VP (VBZ is) (VP (VBN computed) (PP (IN by) (S (VP (VBG multiplying) (NP (NP (NP (DT the) (NN heart) (NN rate)) (PRN (-LRB- -LRB-) (PP (IN in) (NP (NP (NNS beats)) (PP (IN per) (NP (NN minute))))) (-RRB- -RRB-))) (CC and) (NP (NP (DT the) (NN stroke) (NN volume)) (PRN (-LRB- -LRB-) (NP (NP (DT the) (NN volume)) (PP (IN of) (NP (NN blood))) (VP (VBN ejected) (PP (IN during) (NP (NN ventricular) (NN systole))))) (-RRB- -RRB-))))))))) (. .)))
Cardiac output (blood flow measured in volume per unit time) is computed by multiplying the heart rate (in beats per minute) and the stroke volume (the volume of blood ejected during ventricular systole).
(ROOT (S (NP (NP (DT The) (NN term) (JJ cardiac) (NN output)) (, ,) (VP (VBN calculated) (PP (IN by) (S (VP (VBG multiplying) (NP (NN heart) (NNS contractions)) (PP (IN by) (NP (NN stroke) (NN volume))))))) (, ,)) (VP (VBZ means) (NP (NP (DT the) (NN volume)) (PP (IN of) (NP (NP (NN blood)) (VP (VBN pumped) (PP (IN by) (NP (NP (DT the) (NN heart)) (PP (IN in) (NP (CD one) (NN minute)))))))))) (. .)))
The term cardiac output, calculated by multiplying heart contractions by stroke volume, means the volume of blood pumped by the heart in one minute.