Question

21
21
m/c
0/2.50
d
q: a patient with heart failure is able to perform their daily activities without issue but
they cant keep up during their weekly tennis games as they used to. this symptom is
most directly related to a pathological reduction in which of the following cardiac
parameters?
description: sys2 heart obj4a
a: ejection fraction
b: cardiac reserve
c: afterload
d: preload

Explanation:

Cardiac reserve is the difference between the maximum cardiac output a heart can achieve and the resting cardiac output. In heart failure, when a patient can do daily activities (resting state) but fails during exercise (tennis, a more demanding state), it indicates a problem with the heart's ability to increase output (cardiac reserve). Ejection fraction is about the percentage of blood pumped out of the ventricle per beat. Afterload is the resistance the heart has to pump against. Preload is the amount of blood in the ventricle before contraction. Since the issue is related to the heart's inability to meet increased demand (during tennis), it's about cardiac reserve.

Answer:

B. Cardiac Reserve