Correct!
4. 1 and 3

The dilated inferior vena cava is consistent with fluid overload. This could be a failing left ventricle, however, the cardiac ultrasound shows the left ventricle to be contracting (estimated ejection fraction >50%) but there is a large left to right shunt at the level of the ventricles. Cardiology was consulted and they suggested a right sided heart catheterization.

1. Measure the blood oxygen saturation from the right atrium, right ventricle and pulmonary artery looking for a step up in the oxygen saturation
2. Perform right ventricular angiography to demonstrate the shunt
3. Pressures measurements in the right atrium, right ventricle, pulmonary artery and pulmonary artery wedge position
4. 1 and 3
5. All of the above

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