All issues > Volume 31(7); 1988

Original Article

J Korean Pediatr Soc. 1988;31(7):881-891. Published online July 31, 1988.

Noninvasive Estimation of Systemic and Pulmonary Blood flow and the Ratio of Pulmonary to Systemic flow by Two-Dimensional Doppler Echocardigraphy.

Woo Tack Kim¹, Ki Ho Kim¹, Haeng Mi Kim¹, Snag Bum Lee¹

¹Department of Pediatrics, Collage of Medicine, Kyungpook National University, Taegu, Korea

Received: January 5, 1988;  Accepted: February 7, 1988.

Abstract

This study was designed to assess the accuracy and problems of noninvasively measuring right and left cardiac output at various sampling sites by range gated pursed Doppler echocardiography. High correlations were found between Fick-and Doppler-derived measurements of systemic and pulmonary flow as well as the pulmonary to systemic flow ratio in 21 patients undergoing cardiac catheterization (systemic flow [n=21] r=0.81; plulmonary flow [n=29], r=0.78;Qp/Qs ratio [n= 29], r=0.52). Outflow tract obstruction. PDA and subpulmonic VSD were the only lesions in which limitations to the use of conventional method of measurement (suprastmal projection for aortic flow measurements and parasternal short axis view of MPA for pulmonary flow measurements). Even in these cases, the multiple sampling sites technique (mitral orifice and right ventricular outflow tract in addition to the conventional measurement sites), while time comsuming, can solve the problems.

Keywords :Systemic and pulmonary blood flow, Ratio of pulmonary to systemic flow, Two-dimensional Doppler echocardiography