What cardiac variable is most likely to change and how will it change due to the myocardial ...

Coronary artery disease. Atherosclerosis in coronary arteries may decrease blood flow to cells of the myocardium. A resulting heart attack may result in myocardial infarction. Infarction implies cell death in the myocardium. Following a serious heart attack that affects the contractile cardiac muscle cells of the right ventricle, what cardiac variable is most likely to change and how will it change due to the myocardial infarction?

A. heart rate increases
B. stroke volume increases
C. heart rate decreases
D. stroke volume decreases