Which of the following is listed as a risk factor for TIA?

Which of the following is listed as a risk factor for TIA?

• A. Hyperlipidemia
• B. Obesity
• C. Migraine
• D. Atrial fibrillation

Answer: (D)

Atrial fibrillation raises the risk of a transient ischemic attack because the irregular, rapid atrial contractions promote blood stasis and thrombus formation in the left atrium. These clots can dislodge and travel to cerebral arteries, causing transient neurologic deficits characteristic of a TIA. This embolic mechanism is direct and well-established, which is why atrial fibrillation is a primary listed risk factor. Hyperlipidemia and obesity contribute to atherosclerotic vascular disease and overall cardiovascular risk, which can increase the chance of ischemic events, but they don’t cause the immediate cardioembolic process seen with atrial fibrillation. Migraine is not typically listed as a primary risk factor for TIA; it’s more often discussed in the context of stroke risk in certain populations, especially with aura.

Atrial fibrillation raises the risk of a transient ischemic attack because the irregular, rapid atrial contractions promote blood stasis and thrombus formation in the left atrium. These clots can dislodge and travel to cerebral arteries, causing transient neurologic deficits characteristic of a TIA. This embolic mechanism is direct and well-established, which is why atrial fibrillation is a primary listed risk factor.

Hyperlipidemia and obesity contribute to atherosclerotic vascular disease and overall cardiovascular risk, which can increase the chance of ischemic events, but they don’t cause the immediate cardioembolic process seen with atrial fibrillation. Migraine is not typically listed as a primary risk factor for TIA; it’s more often discussed in the context of stroke risk in certain populations, especially with aura.