Lecture #8

Question 1

Maximum degree of cardiac shortening is limited by:

Answer 1

The fiber’s peak isometric tension.

Question 2

An increase in downstream pressure will result in -

Answer 2

1. A higher aortic valve opening pressure.
2. A higher aortic valve closing pressure.
3. A higher end-systolic pressure.

Question 3

An increase in preload -

Answer 3

1. Is due to a high-end-diastolic volume.
2. causes an increase in stroke volume.
3. Does not effect end-systolic volume.