Related Experiment Video
Updated: Jul 18, 2026
Catheter-based Endovascular Angioplasty for Fibrosing Mediastinitis-associated Pulmonary Vein Stenosis
Published on: August 26, 2025
Factors determining immediate and medium-term results after pulmonary balloon valvuloplasty
Suchaya Silvilairat1, Yupada Pongprot, Rekwan Sittiwangkul
1Division of Cardiology, Department of Pediatrics, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand. ssamana@mail.med.cmu.ac.th
Objective:
To determine factors influencing immediate and medium-term results of Pulmonary Balloon Valvuloplasty (PBV) for pulmonary valve stenosis.
Material And Method:
Between 1995 and 2001, the authors carried out PBV in 25 consecutive patients. Two treatment outcomes including immediate and medium-term results were analyzed. The immediate results were classified into two groups based on the pulmonary systolic pressure gradient (PG) immediately after dilation: group 1 with a PG < or = 35 mmHg and group II with a PG > 35 mmHg. At medium-term follow-up of 6 to 60 months, echocardiographic evaluations were analyzed and divided into two groups: group A with a PG < or = 25 mmHg and group B with a PG > 25 mmHg. Demographic characteristics and hemodynamic parameters of immediate and medium-term results were compared and analyzed.
Results:
Immediately after PBV the right ventricular systolic pressure (RVSP) decreased from 115.3 +/- 37.6 mmHg to 67.0 +/- 28.5 mmHg (p < 0.001). The pulmonary systolic pressure gradient decreased from 90.4 +/- 37.9 mmHg to 39.3 +/- 25.6 mmHg (p < 0.001). Nine of the 25 patients (group 11; 36%), with incomplete immediate relief of the obstruction, had more symptoms, a higher baseline PG, higher right atrial pressure, higher RVSP, and a higher systolic pressure ratio. Six of the 25 patients (group B; 24%), with suboptimal medium-term results, had a higher right ventricular voltage on the electrocardiogram, higher pre-dilation PG, and higher RVSP.
Conclusion:
Successful medium-term outcomes following pulmonary balloon valvuloplasty were achieved in 76% of the patients, with a greater success rate (91%) in patients with a lower right ventricular voltage electrocardiogram (R wave amplitude in V1) < or = 21 mm, a prevalvuloplasty systolic gradient < or = 90 mmHg, and right ventricular systolic pressure < or = 125 mmHg.
