Antenatal detection of hypoplastic right ventricle with fetal M-mode echocardiography. A report of two cases.

Two cases of hypoplastic right ventricle were identified using fetal M-mode echocardiography. Follow-up studies and autopsies confirmed these findings. Both lesions were detected in women without antenatal risk factors. The indication for M-mode examination was an abnormal four-chambered view of the fetal heart obtained during ultrasound examination for common obstetric indications.