In mitral stenosis, which factor increases the risk for atrial fibrillation?

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Multiple Choice

In mitral stenosis, which factor increases the risk for atrial fibrillation?

Explanation:
Mitral stenosis raises pressure inside the left atrium, causing it to progressively enlarge. This enlargement stretches the atrial tissue and disrupts normal electrical conduction, creating a substrate that favors the development of atrial fibrillation through reentry circuits and electrical remodeling. Among the options, left atrial enlargement is the strongest and most direct factor increasing AF risk in mitral stenosis. Right atrial enlargement, left ventricular hypertrophy, and pulmonary hypertension may occur with mitral stenosis, but they are not the primary drivers of AF in this setting.

Mitral stenosis raises pressure inside the left atrium, causing it to progressively enlarge. This enlargement stretches the atrial tissue and disrupts normal electrical conduction, creating a substrate that favors the development of atrial fibrillation through reentry circuits and electrical remodeling. Among the options, left atrial enlargement is the strongest and most direct factor increasing AF risk in mitral stenosis. Right atrial enlargement, left ventricular hypertrophy, and pulmonary hypertension may occur with mitral stenosis, but they are not the primary drivers of AF in this setting.

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