抄録
Electrocardiographic studies were made on 40 cases of mitral stenosis before and after mitral commissurotomy.
Auricular fibrillation was present in 28% of the total cases. Various extrasystoles were seen before and after surgery, especially immediate after surgery, Right axis deviation was present in 55% of the total cases pre-operatively. Electrical axes were moved to the left in many cases post-operatively, and right axis deviation was reduced to 28%.
Right and left auricular, and right ventricular hypertrophies were present in 20, 66 and 20% of the total cases pre-operatively, and they were reduced to 3, 7 and 8% post-operatively. Left ventricular hypertrophy was present in 33% of the cases, and it was increased to 50% post-operatively.
Transient myocardial injury was seen in all cases in the immediate post-operative period, and it was improved in several days, but negative T waves persisted for a few months in many cases. ST-T changes suggestive of myocardial disease were present in 68% of 28 cases pre-operatively, which was reduced to 36% in 6 months after mitral commissurotomy.
