All issues > Volume 30(9); 1987

Original Article

J Korean Pediatr Soc. 1987;30(9):982-989. Published online September 30, 1987.

Comparison of Pulmonary and Systemic Blood Flow and Ratio of Pulmonary Blood Flow to Systemic Blood Flow Obtained by Pulsed Wave Doppler Echocardiography and Fick Method.

Sung Gy Jin¹, Myeng Hee Cha¹, Kyeng Sook Cho¹, Doo Sung Moon¹

¹Department of Pediatrics, Maryknoll Hospital, Pusan, Korea

Abstract

This study was designed to assess the accuracy of pulsed wave Doppler echocardiographic measurement of pulmonary blood flow(Qp), systemic blood flow(Qs) and the ratio of pulmonary blood flow to systemic blood flow(Qp/Qs) to compare with Fick method. Seventeen patients with ventricular septal defect, aged 10 months to 14 years, participated for this study, and Doppler echocardiograghic examinations using the Aloka SSD-880 were performed. Two dimensional Doppler echocardiographic measurements of pulmonary blood flow were obtained by parasternal short axis view, and systemic blood flow by suprasternal notch view. In all patients cardiac catheterizations were performed within 48 hours after examination of Doppler echocardiography, and Qp, Qs, Qp/Qs ratio were calculated by using Fick method. Problems encountered in some patients included turbulent blood flow, alising, difficulty in measur- ing of pulmonary artery diameter by 2-D echocardiography and difficulty in obtaining of aortic blood flow by pulsed wave Doppler echocardiography. Comparison of Qp, Qs, Qp/Qs ratio obtained by pulsed wave Doppler echocardiography and with those by Fick method was well correlated (correlation coefficient was 0.750 in Qp, 0.738 in Qs and 0.809 in Qp/Qs ratio).

Keywords :Pulsed wave Doppler echocardiography; Fick method; Qp; Qs; Qp/Qs ratio.