Culprit or companion-foetal right ventricular diverticulum: Role of M-mode echocardiography in distinguishing it from ventricular aneurysm

Congenital ventricular diverticula and aneurysms are very rare. Prenatal diagnosis of such cases is reported only by few authors. Differentiating these two entities by echocardiography alone is very difficult. We present a case of prenatally diagnosed right ventricular diverticulum at 33 weeks of gestation. She was 37-year-old and primigravida with no past medical history. She underwent a routine prenatal scanning and was suspected to have a foetal cardiac abnormality and referred to us. It was diagnosed as foetal right ventricular diverticulum with the help of Motion-mode (M-mode) echocardiogram and was advised follow up after delivery. One of the differential diagnosis is ventricular aneurysm. Unfortunately, she had a miscarriage at 36 weeks due to unknown cause.