CitationWe assessed the factors responsible for left atrial appendage clot formation in patients with severe mitral stenosis through transesophageal echocardiography Methods: An observational study was conducted among 82 (73 females, mean age 35.8±11.8 years) patients with severe mitral stenosis who underwent transesophageal echocardiography before percutaneous transmitral commisurotomy. Patients were classified into two groups based on the presence or absence of left atrial thrombus. Group l consisted of 24 patients (women to men ratio 91:9) with left atrial thrombus, while group 2 consisted of 58 patients (women to men ratio 88:12) without left atrial thrombus. Transesophageal echocardiographic findings were reviewed in all patients. Results: There was no significant difference between the two groups in terms of age, sex, systolic pulmonary artery pressure and mitral valve mean pressure gradient (MVMPG), there was significant difference regarding frequency of atrial fibrillation (p≤0.05), left atrial size (p≤ 0.05), mitral valve area andflow velocities (p≤0.05) in group-1 patients. Similarly, atrial fibrillation was observed in 35(42.7%) patients out of which 20(83.3%) patients had thrombus in left atrial appendage. Conclusion: The frequency of left atrial thrombus formation increased in patients with rheumatic mitral stenosis because of low left atrial appendage flow velocities, atrial fibrillation and smaller mitral valve area.
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