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Table 2 Comparison between patients in sinus rhythm and those in AF

From: The use of MRI in quantification of the atrial fibrosis in patients with rheumatic mitral disease

  Patients in sinus rhythm (n = 30) Patients in AF (n = 30) P value
Age, years 30.7 ± 6.98 35.17 ± 8.76 0.016
Gender, female 12 (54.5%) 10 (45.5%) 0.789
DM 0 5 (16.7%) 0.02
HTN 0 2 (6.7%) 1.154
CVS 0 1 (3.3%) 0.317
Duration of symptoms, months 20 ± 7.27 31.80 ± 16.38 0.001
Mitral valve area by echo, cm2 1.33 ± 0.182 1.17 ± 0.121 < 0.001
LA diameter by echo, cm 4.5 ± 0.335 5.13 ± 0.469 < 0.001
LA diameter/BSA, cm/m2 2.46 ± 0.22 2.78 ± 0.29 < 0.001
LA volume by echo, ml 68.20 ± 6.67 77.87 ± 5.35 < 0.001
LA volume index by echo, ml/m2 37.30 ± 4.28 42.20 ± 3.62 < 0.001
Presence of fibrosis 10 (33.3%) 30 (100%) < 0.001
Moderate or severe fibrosis 6 (21%) 21 (70%) < 0.001
Distribution of fibrosis
 Left atrial walls involved    
  Posterior wall 8 (26.7%) 26 (86.7%) < 0.001
  Septum 1 (3.3%) 20 (66.7%) < 0.001
  Anterior wall 4 (14%) 14 (46.7%) 0.005
 Right atrium involvement 6 (20%) 19 (63.3%) 0.001
  1. DM diabetes mellitus, HTN hypertension, CVS cerebrovascular stroke, BSA body surface area