Search for: [Abstract = "vein, requiring surgical removal. Three children needed blood transfusions, and one – supraventricular arrhythmia treatment \(adenosine\). In late follow\-up, one patient subjected to a repeated BPV due to restenosis most likely developed detachment of the pulmonary trunk intima \(\?\), what was diagnosed elsewhere. In late follow\-up \(x = 6.1 years after BPV\), loud systolic murmur \(>3\/6\) was demonstrated by a similar percentage of patients from each group \(12.1 %, 14.6 % and 13.2%, respectively\), similarly as persistent signs of right ventricular hypertrophy in ECG \(10.3 %, 9.8 % and 13.2%, respectively\). Echocardiography performed 1, 2 and 5 years after the procedure demonstrated a gradual decrease of pulmonary systolic pressure gradient in all groups\; at the end of the follow\-up, its value was 13.4±6.9 mmHg, 16.9±12.1 mmHg and 17.1±12.2 mmHg, respectively. The percentage of subvalvular pulmonary stenosis was decreased, dropping from 8.6% to 0 in Group 1, 12.2 % to 2.4 % in Group 2 and 28.9 % to 10.5% in Group 3. Tricuspid valve insufficiency >IIo was non\-significantly \(P = 0.07\) more common in Group 3 children \(Group 1 – 5.2 %, Group 2 – 4.8 %, Group 3 – 13.2 %\). On the other hand, a significant PVI rate \(P = 0.007\) was noted more frequently in Group 3 children \(Group 1 – 17.2 %, Group 2 – 24.2 %, Group 3 – 39.5 %\). The majority of children developed normally. Body mass d"]

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