SACM | SACM

1. How would you characterize the changes in the right ventricle?

The chamber is enlarged and the wall thickness is normal.

The chamber is normal and the wall is too thick.

The chamber is enlarged and the wall is too thick.

The chamber is too small and the wall is too thick.

2. What pathophysiologic process would best explain the changes in the right ventricle?

Chronic, acquired pressure overload

Acute, acquired pressure overload

Volume overload

Chronic, congenital pressure overload

3. What specific disease process would best explain the changes in the right ventricle?

Acute pulmonary hypertension

Chronic pulmonary hypertension

Pulmonic stenosis

Tricuspid regurgitation

4. The left ventricle is normally round in diastole and in systole. The interventricular septum in this dog is flattened in diastole. Of what significance is this?

The dog has suffered a myocardial infarction.

The septal thickness has decreased rendering it dysfunctional.

The septum has become fibrotic and so does not move properly in diastole.

The diastolic pressure is increased in the right ventricle to a level higher than it is in the left ventricle. This signifies the dog is most likely in right heart failure.

5. The interventricular septum is also flattened in systole. Of what significance is this?

Right ventricular systolic pressure is most likely higher than left ventricular systolic pressure.

The left ventricle is abnormally shaped from a congenital lesion.

The dog has suffered a myocardial infarction.

This is normal.

Case 33 — Two-Dimensional Echocardiograms

Right parasternal long-axis view

Left apical view

Right parasternal cross-sectional view (diastole)

Right parasternal cross-sectional view (systole)

Right parasternal cross-sectional view from a different dog with the same hemodynamic abnormality

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