Background: A uterine arteriovenous malformation (AVM) is a rare cause of uterine bleeding. It may have varied presentations ranging from being completely asymptomatic; to features of congestive heart failure to vaginal bleeding which may at times life be threatening. Clinical findings in such cases are often un-reliable; requiring a high index of suspicion to make the diagnosis. Sonographic gray scale features are non-specific requiring confirmation with colour and spectral Doppler. Case Report: We report a case of a 46-year-old lady who presented with heavy vaginal bleeding and ultrasound/colour Doppler evidence of uterine AVM managed by abdominal hysterectomy, describing the imaging features on ultrasound and Doppler. We also discuss in brief about this uncommon but serious condition which the radiologist/gynaecologist may encounter in thier practise. Conclusions: Uterine AV Malformation is a rare but potentially life-threatening cause of menorrhagia which must be kept in the differential diagnosis of sudden and massive vaginal bleeding. Ultrasound remains the modality of choice in diagnosing the condition which requires a high index of clinical suspicion. Color and spectral Doppler ultrasound should be used to supplement the findings and to confirm the diagnosis.