Abstract
The long-term efficacy of transluminal balloon valvuloplasty (val) was evaluated in 7 children (age 1.5-9.9 yrs) with pulmonary stenosis 1 yr post-val. Prior to, immediately (Imm) post-val and at 1 yr post-val, the following parameters were evaluated at cath: pulmonary artery (PA), right ventricular (RV) and aortic pressures, heart rate (HR), pulmonary blood flow (PBF) and pulmonary valve area (PVA); ECG, vectorcardiogram (VCG) and doppler echocardiogram were performed.One yr post-val, RV-PA gradient and R V press decreased further from Imm post-val values in 6/7 pts. In addition, there was also an increase in both PBF and PVA over Imm post-val values. Although the ECG only mildly improved 1 yr post-val (R in V1 decreased from 13±2 to 11±4 mm), the VCG significantly improved with a decrease in right maximal spatial voltage (2.0±.9 to 1.1±.4 mV, p<.05) and a loss of the clockwise horizontal loop in all pts. Pulmonary regurgitation was present at 1 yr post-val (auscultation 2/7; doppler 6/7). Inferior vena cava thrombosis occurred in 1 pt. Balloon val appears to be an effective, safe method for producing long term relief of valvar pulmonary stenosis.
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