A 60-year-old mildly obese woman is admitted to the hospital with a chief complaint of recurrent chest pain on exertion. The patient reports several episodes of chest pain over the past several years and painful leg cramps when walking. Fasting blood glucose (160 mg/dL) and total serum cholesterol (370 mg/dL) are high. The ECG is normal and blood tests for cardiac-specific proteins are negative. Chest pain in this patient is most likely due to which of the following underlying conditions?

**Core Concept**
Angina pectoris and intermittent claudication can be caused by atherosclerotic vascular disease, which is a condition characterized by the buildup of plaque in the arterial walls. This process leads to reduced blood flow to the heart muscle and lower limbs.

**Why the Correct Answer is Right**
The patient's symptoms of recurrent chest pain on exertion and painful leg cramps when walking are classic presentations of atherosclerotic vascular disease. The high fasting blood glucose and total serum cholesterol levels further support this diagnosis, as these are risk factors for atherosclerosis. The negative blood tests for cardiac-specific proteins and normal ECG rule out acute myocardial infarction or cardiac ischemia.

**Why Each Wrong Option is Incorrect**
**Option A:** This choice would be incorrect as it does not address the patient's symptoms or laboratory findings. Atrial septal defect (ASD) is a congenital heart defect that may not present with symptoms until adulthood, but it would not explain the patient's high cholesterol or glucose levels.

**Option B:** This choice is incorrect as it does not account for the patient's high cholesterol and glucose levels. Hypertrophic cardiomyopathy is a condition characterized by thickening of the heart muscle, which can lead to chest pain, but it would not explain the patient's symptoms of leg cramps or the laboratory findings.

**Option C:** This choice is incorrect as it does not address the patient's symptoms or laboratory findings. Pulmonary embolism is a condition characterized by a blood clot in the lungs, which can present with chest pain, but it would not explain the patient's symptoms of leg cramps or the laboratory findings.

**Option D:** This choice is incorrect as it does not address the patient's symptoms or laboratory findings. Gastroesophageal reflux disease (GERD) is a condition characterized by stomach acid flowing back into the esophagus, which can present with chest pain, but it would not explain the patient's symptoms of leg cramps or the laboratory findings.

**Clinical Pearl / High-Yield Fact**
Atherosclerotic vascular disease is a systemic condition that can affect multiple vascular beds, including the coronary arteries, peripheral arteries, and cerebral arteries. It is often associated with risk factors such as high cholesterol, high blood pressure, smoking, and diabetes mellitus.

**Correct Answer:** D. Atherosclerotic vascular disease is the most likely underlying cause of this patient's symptoms.

✓ Correct Answer: A. Atherosclerosis of coronary artery