THE EFFECT OF BALLOONSIZE ONTHE IMMEDIATE RESULTSOF PULMONARYVALVULOPLASTY.
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In order to find out the ideal size of a balloon needed to produce the most effective dilatation in patients having isolated pulmonary stenosis, the haemodynamic effectwas studied before and immediately after balloon pulmonary valvuloplasty in 30 patients (17males)with a mean age 9.9816.28 years (range from0.5 to 21 years). Thewhole 39 dilatations performed in these patients were classified into 3 groups (Gr) according to the balloon diameter to thepulmonary valve annulus (B/A) ratio: Gr I: B/A ratio <1.3 (10 dilatations), with a mean ratio 1.1910.09 (range 1.04 to 1.29). Gr. II: B/A ratio 1.3:1.5 (18 dilatations), with a mean ratio 1.40.06 (range 1.33 to 1.5). Gr. Ill B/A ratio > 1.5 (11 dilatations) with a mean ratio 1.630.08 (range 1.53 to 1.8).