**Core Concept:** Hematuria (blood in the urine) can be caused by various conditions, including renal artery or renal vein thrombosis. Renal artery thrombosis is a life-threatening event that can lead to acute kidney injury, stroke, and multiorgan failure due to reduced perfusion and hypoxia.

**Why the Correct Answer is Right:** The most likely diagnosis in this case is renal artery thrombosis (Option D) because it is the most severe and immediate consequence of the patient's risk factors and clinical presentation. The combination of coronary artery disease, peripheral vascular disease, and a recent heart attack increases the risk of thromboembolic events. The sudden onset, painless hematuria, and subsequent stroke and death further support this diagnosis.

**Why Each Wrong Option is Incorrect:**

A. Renal cell carcinoma (Option B) is less likely because it typically presents with pain, flank pain, and a mass. The sudden onset and absence of a mass make this diagnosis less probable.

C. IgA nephropathy (Option C) is less likely due to the absence of typical symptoms (flank pain, proteinuria) and the sudden onset of hematuria and subsequent stroke.

The patient's history of coronary artery disease, peripheral vascular disease, and recent heart attack increases the risk of thromboembolic events, making renal artery thrombosis the most probable diagnosis.

**Clinical Pearl:** Thromboembolic events in patients with cardiovascular risk factors should prompt a thorough evaluation for primary and secondary prevention measures, as well as close monitoring of renal function and hematuria. Rapidly progressive hematuria and stroke should prompt further investigation for underlying thrombotic or embolic causes.