摘要
The corrected shunt flow rate (Fc ) and corrected defect orifice area (Ac) were calculated by modified equation F= 2πR2 ×(NL-VL.voT× Sinθ) in 23 patients with single membranous ventricular septal defect, in order to correct the ef fect of left ventricular outflow on flow convergence region on the left septa1 sur-face. The results indicated that F. was closely correlated with Qp -Q5. and Qp/Q5measured by pulsed wave Doppler (r = 0. 95 and r = 0. 81 respectively, P < 0.001 ). And the correlation between A. and the diameter of defect (Dd) rneasureddirectly in two-dimensional views was better than that between uncorrected defectorifice area (A ) and the Dd (r = O- 98 and O- 69, respectively, P< O. Ool ). Theshunt flow rate calculated by ideal equation F= 2ffR2 X NL overestimated the actu-al shunt flow rate in ventricular septal defect, especialIy in mernbranous type.Our study concluded that F. can be used for a more accurate eva1uation of theshunt severity of ventricular septal defect.
The corrected shunt flow rate (Fc ) and corrected defect orifice area (Ac) were calculated by modified equation F= 2πR2 ×(NL-VL.voT× Sinθ) in 23 patients with single membranous ventricular septal defect, in order to correct the ef fect of left ventricular outflow on flow convergence region on the left septa1 sur-face. The results indicated that F. was closely correlated with Qp -Q5. and Qp/Q5measured by pulsed wave Doppler (r = 0. 95 and r = 0. 81 respectively, P < 0.001 ). And the correlation between A. and the diameter of defect (Dd) rneasureddirectly in two-dimensional views was better than that between uncorrected defectorifice area (A ) and the Dd (r = O- 98 and O- 69, respectively, P< O. Ool ). Theshunt flow rate calculated by ideal equation F= 2ffR2 X NL overestimated the actu-al shunt flow rate in ventricular septal defect, especialIy in mernbranous type.Our study concluded that F. can be used for a more accurate eva1uation of theshunt severity of ventricular septal defect.
