<prompt> Which one of the following will decrease with an increase in ejection fraction?Stroke volumeHea rateCardiac outputEnd-systolic volume ESV  <response>: EF X 100. If ejection fraction has increased, it means stroke volume has increased or decrease in EDV, or both. If SV has increased, with a normal EDV, it means there is an increase in myocardial contractility. It will increase the cardiac output. Hea rate may or may not change. If SV has increased, then end-systolic volume will decrease. 