What is the primary pathophysiological reason for performing Coronary Artery Bypass Surgery?

Choice A rationale
Left heart failure is a common cause of right heart failure. When the left side of the heart is unable to pump blood efficiently, it can cause increased pressure in the lungs, which can then lead to right heart failure.
Choice B rationale
Pericarditis, an inflammation of the sac-like covering around the heart, is not typically a direct cause of right heart failure.
Choice C rationale
While hypertension, or high blood pressure, can contribute to heart failure, it typically affects the left side of the heart more than the right.
Choice D rationale
Acute pneumonia, an infection that inflames the air sacs in one or both lungs, is not typically a direct cause of right heart failure.

Choice A rationale
Reducing the overall contractility of the heart muscle is not the primary reason for performing Coronary Artery Bypass Surgery (CABG)4. In fact, reducing the contractility of the heart muscle could potentially decrease the heart’s ability to pump blood effectively.
Choice B rationale
Reducing plaque buildup in the carotid artery is not the primary reason for performing CABG4. While plaque buildup in the carotid artery can lead to serious conditions such as stroke, CABG is specifically performed to bypass blocked coronary arteries, not carotid arteries.
Choice C rationale
Increasing the oxygen supply to the heart muscle is the primary reason for performing CABG4. When coronary arteries become blocked or narrowed due to plaque buildup, the heart muscle may not receive enough oxygen-rich blood. CABG is performed to create a new route, or bypass, around the blocked artery, which improves blood flow and oxygen supply to the heart muscle.
Choice D rationale
Increasing the myocardial workload is not the primary reason for performing CABG4. In fact, increasing the workload of the heart could potentially exacerbate heart disease and lead to complications such as heart failure.