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Updated: Jul 27, 2026
06:47
A Pulmonary Trunk Banding Model of Pressure Overload Induced Right Ventricular Hypertrophy and Failure
Published on: November 29, 2018
Second heart sound after pulmonary arterial banding operation
British Heart Journal
|May 1, 1976
Summary
Pulmonary artery banding effectiveness is assessed by the A2-P2 interval. A narrow interval (<40 ms) after banding suggests persistent pulmonary hypertension and warrants further investigation.
Area of Science:
- Cardiology
- Pediatric Cardiac Surgery
Background:
- Pulmonary artery banding (PAB) is a palliative procedure for complex congenital heart disease.
- Assessing the effectiveness of PAB is crucial for patient management.
Purpose of the Study:
- To correlate phonocardiogram findings, specifically the A2-P2 interval, with hemodynamic and angiographic data after PAB.
- To evaluate the A2-P2 interval as a predictor of pulmonary hypertension and PAB effectiveness.
Main Methods:
- Phonocardiograms of 38 patients post-PAB were analyzed.
- Correlation with hemodynamic and angiographic data, including pulmonary vascular resistance and pressures.
- Assessment of the A2-P2 interval in relation to pulmonary vascular resistance and PAB success.
Main Results:
- A narrow A2-P2 interval (<40 ms) was observed in most patients with high pulmonary vascular resistance.
- A wider A2-P2 interval (>40 ms) was common in patients with normal pulmonary vascular resistance.
- The A2-P2 interval remained a reliable indicator of PAB effectiveness one year post-operation.
Conclusions:
- The A2-P2 interval is a valuable non-invasive tool for assessing PAB effectiveness.
- A persistent narrow A2-P2 interval (<40 ms) indicates potential residual pulmonary hypertension and necessitates repeat catheterization.
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