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Updated: Aug 8, 2026
Shunt Surgery, Right Heart Catheterization, and Vascular Morphometry in a Rat Model for Flow-induced Pulmonary Arterial Hypertension
Published on: February 11, 2017
Quantification of left-to-right shunt in patent ductus arteriosus with the PISA method
Itzhak Kronzon1, Paul A Tunick, Barry P Rosenzweig
1Department of Medicine, Medical Center, New York University School of Medicine, 560 First Avenue, New York, NY 10016, USA. Itzhak.Kronzon@med.nyu.edu
Abstract:
Direct Doppler echocardiographic calculation of shunt flow in patent ductus arteriosus (PDA) may be difficult because the orifice area is not well visualized. We used proximal isovelocity surface area (PISA) method to calculate the effective shunt orifice area and the shunt volume in a patient with PDA. The PISA calculation correlated well with shunt estimation by echocardiographic volumetric methods and by oximetry.
