Question

1. Draw a typical elastance versus time curve for a left ventricle. Roughly annotate this graph with the following:

Slope of ESPVR and EDPVR

All four valve events (openings and closings of aortic and mitral valves)

Diastolic and systolic phases

Filling and ejection phases

2. Draw elastance versus time curves for following LVs:

Normal LV

An LV with low contractility

An LV with high contractility

3. How will the systolic elastance (slope of ESPVR) be affected under following conditions (state your answer as, "will decrease" or "will increase" or "same", or "uh.. what?"):

Dilated cardiomypathy

Restricted cardiomyopathy

Hypertrophic cardiomyopathy

A normal ventricle with increased pre-load

A normal ventricle with increased after-load

Answer 1

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