Non-invasive technique for diagnosing atrial septal defect and assessing shunt volume using directional Doppler ultrasound. Correlations with phasic flow velocity patterns of the shunt.

eIn 30 patients in sinus rhythm with atrial septal defect, confirmed by cardiac catheterization, the jugular flow velocity curve was recorded transcutaneously with a directional ultrasonic Doppler velocimeter. In all cases characteristic anomalies of the trace were noted. A physiopathological interpretation of these anomalies is proposed, supported by the instantaneous phasic flow velocity patterns of the shunt itself. This could be recorded in Io cases at the site of the defect by means of an ultrasonic catheter velocimeter. Furthermore, a statistically significant correlation was dis- played between the jugular venous flow velocity curve anonalies and the volume of the shunt as on September 1, 2023 by guest.