Balloon valvuloplasty for XXXX --two-year follow-up: hemodynamic and Doppler evaluation.

@entity1 @entity384 @entity34004 @entity849 @entity850
The purpose of this investigation was to evaluate the efficacy, technique, and follow-up results of @entity384 angioplasty for @entity849 . Percutaneous dilation was performed on 63 @entity1 with @entity849 (ages 3 months to 76 years, mean = 4.3 years). In 43 @entity1 , a single balloon was used; in 20 @entity1 two balloons were used simultaneously. The pressure gradient across the pulmonary valve was determined with right ventricular and main pulmonary artery catheters. Pressure gradients simultaneously were estimated by continuous wave Doppler (CWD) during catheterization. The peak systolic ejection gradient was obtained by both techniques both pre- and postangioplasty. There was excellent linear correlation between the simultaneous catheter pressure gradient and the pressure gradient estimated by Doppler (r = 0.99). Follow-up pressure gradient estimations by Doppler echocardiogram were obtained in 30 @entity1 between 6 months and 30 months postcatheterization (mean = 13 months). The mean preangioplasty gradient of 64 mm Hg (range 30-160 mm Hg) was reduced to 22 mm Hg (range 2-31 mm Hg). A significant @entity34004 (52-95%, mean 68%) occurred in each @entity1 . A linear correlation was found between the predilation gradient and the pressure gradient drop (r = 0.92). Mean follow-up gradient by Doppler was 20 mm Hg (range 0-31 mm Hg), and there was no significant difference between these gradients and the postdilation gradient. No important complications were noted. These data confirm that @entity384 angioplasty for @entity849 is safe and effective, and suggest that @entity850 does not recur.
