A 83-year-old retired navy general shows improvement in claudication following aortoiliac bypass surgery. What is the factor that would cause the greatest concern over the possibility of developing cardiac complications? SELECT ONE.
## **Core Concept**
The question revolves around the perioperative risk assessment for cardiac complications in a patient undergoing a major vascular surgery, specifically an aortoiliac bypass surgery. The patient's history of claudication due to aortoiliac disease suggests significant atherosclerotic disease, which often implies a high risk for cardiac complications due to shared risk factors and the systemic nature of atherosclerosis.
## **Why the Correct Answer is Right**
The correct answer, , is related to the Revised Cardiac Risk Index (RCRI) or Goldman risk score, which includes six predictors of perioperative cardiac complications:
- High-risk surgery (in this case, aortoiliac bypass surgery)
- History of ischemic heart disease
- History of congestive heart failure
- History of cerebrovascular disease
- Diabetes mellitus requiring insulin
- Serum creatinine > 2.0 mg/dL
However, without specific details on each option, we can infer that the greatest concern over cardiac complications would likely be related to pre-existing cardiac conditions or significant risk factors for cardiac disease. Aortoiliac bypass surgery is considered high-risk for cardiac complications, and any pre-existing cardiac condition would increase this risk.
## **Why Each Wrong Option is Incorrect**
- **Option A:** Without specifics, we can't directly address why A is incorrect, but if it doesn't directly relate to a significant cardiac risk factor or doesn't quantify the risk as effectively as the correct answer, it would be considered wrong.
- **Option B:** Similarly, without details, if B doesn't capture a critical aspect of cardiac risk (such as the presence of ischemic heart disease, heart failure, etc.), it would be incorrect.
- **Option C:** If C suggests a lower risk or isn't directly related to cardiac complications, it would be wrong.
## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that patients undergoing vascular surgery, like aortoiliac bypass, are at high risk for cardiac complications. The American College of Cardiology/American Heart Association (ACC/AHA) guidelines recommend a thorough preoperative cardiac evaluation for patients with known cardiac disease or those at high risk for cardiac disease undergoing non-cardiac surgery. A critical point to remember is that perioperative myocardial infarction is a leading cause of morbidity and mortality in patients undergoing major vascular surgery.
## **Correct Answer: D.**