Heterotopic pregnancy diagnosed by emergency ultrasound.

We present a case of heterotopic pregnancy rapidly diagnosed by an emergency physician. To the best of our knowledge, this is the first report of an emergency physician using bedside ultrasound to diagnose an ectopic pregnancy present simultaneously with an intrauterine pregnancy. Other unique features of this case include the diagnosis being made on initial evaluation and the patient's lack of risk factors for heterotopic pregnancy. A review of the cases of heterotopic pregnancy reported in the emergency medicine literature, the rising prevalence of the disease, and factors that may facilitate in making the diagnosis are discussed as well.