<prompt> A hospitalized patient has an ejection fraction of 0.4, a hea rate of 95 beatsmin, and a cardiac output of 3.5 Lmin. What is the patients end-diastolic volume?14 mL37 mL55 mL92 mL  <response>: First, calculate stroke volume from the cardiac output and hea rate: Cardiac output stroke volume x hea rate; thus, stroke volume cardiac output hea rate 3500 mL95 beatsmin 36.8 mL. Then, calculate end-diastolic volume from stroke volume and ejection fraction: Ejection fraction stroke volumeend-diastolic volume; thus end-diastolic volume stroke volumeejection fraction 36.8 mL0.4 92 mL. 