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Table 5 NYHA Class before and after surgery

From: Anterior mitral leaflet length and mitral annulus diameter impact the echocardiographic outcome after isolated myectomy

 Before surgeryAfter surgery
NYHA I0 (0%)20 (55.6%)
NYHA II8 (22.2%)13 (36.1%)
NYHA III26 (72.2%)3 (8.3%)
NYHA IV2 (5.6%)0 (0%)
  1. NYHA: New York Heart Association classification