RT Journal Article SR Electronic T1 An echocardiographic study of perimembranous ventricular septal defect with left ventricular to right atrial shunting. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 45 OP 52 DO 10.1136/hrt.55.1.45 VO 55 IS 1 A1 M P Leung A1 C K Mok A1 R N Lo A1 K C Lau YR 1986 UL http://heart.bmj.com/content/55/1/45.abstract AB Twenty nine patients with isolated perimembranous ventricular septal defects were investigated by M mode, cross sectional, and pulsed Doppler echocardiography. Tricuspid valve anomalies were present in all six patients with a left ventricular-right atrial shunt but in only six (26%) of 23 patients who had interventricular shunts only. Systolic flutter of the tricuspid valve was shown in five (83%) of the six patients with a ventriculoatrial shunt but not in the other patients. Systolic turbulence in both the right ventricle and right atrium was detected by Doppler echocardiography only in patients with ventriculoatrial shunting. A perimembranous ventricular septal defect with left ventricular to right atrial shunt can be diagnosed by its combined M mode, cross sectional, and pulsed Doppler echocardiographic features.