The Vein of Marshall is located anterior to which structure and can be a source of atrial fibrillation?

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Multiple Choice

The Vein of Marshall is located anterior to which structure and can be a source of atrial fibrillation?

Explanation:
The Vein of Marshall sits in the left atrioventricular groove and runs close to the left atrial appendage, with a classic relationship being its position anterior to the left superior pulmonary vein. This anatomical placement is clinically important because the Vein of Marshall can contain myocardial sleeves capable of generating electrical triggers for atrial fibrillation, making it a potential non-pulmonary vein source of AF. In EP procedures, mapping may reveal activity in this vein, and targeted interventions (such as ethanol infusion to ablate the VOM) can help eliminate AF triggers.

The Vein of Marshall sits in the left atrioventricular groove and runs close to the left atrial appendage, with a classic relationship being its position anterior to the left superior pulmonary vein. This anatomical placement is clinically important because the Vein of Marshall can contain myocardial sleeves capable of generating electrical triggers for atrial fibrillation, making it a potential non-pulmonary vein source of AF. In EP procedures, mapping may reveal activity in this vein, and targeted interventions (such as ethanol infusion to ablate the VOM) can help eliminate AF triggers.

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