What increased risk does a patient with peripheral artery disease (PAD) face after surgery?

• A. Stroke
• B. Deep vein thrombosis
• C. Myocardial infarction
• D. Pulmonary embolism

Answer: (C)

A patient with peripheral artery disease (PAD) faces an increased risk of myocardial infarction after surgery primarily due to the systemic atherosclerosis that characterizes this condition. PAD is associated with narrowing and hardening of the peripheral arteries, which is reflective of a generalized pattern of arterial disease. This means that patients with PAD often have significant coronary artery disease as well, which contributes to their risk of myocardial infarction post-operatively.

When a patient with PAD undergoes surgery, particularly procedures that involve anesthesia and may lead to periods of hemodynamic instability, the heart can be subjected to stress. This stress, along with existing cardiovascular conditions linked to PAD, can precipitate a myocardial infarction. Additionally, the surgical stress response can augment myocardial oxygen demand, and if the coronary arteries are compromised, this can lead to ischemia and subsequent infarction.

While other risks like stroke and pulmonary embolism are relevant concerns, the specific relationship between PAD and increased incidence of myocardial infarction is more pronounced due to the shared pathophysiological mechanisms of atherosclerosis affecting both peripheral and coronary circulation.