A year-old patient presented with a painful right leg at the emergency department. Her medical history revealed persistent atrial fibrillation and congestive heart failure. The patient was on adequate warfarin treatment. At physical examination, she had a cold right leg without pulsations and a discoloured and patched skin. the left atrial appendage. Panel C (Fig. 1) shows a threedimensional image of the left atrial structure (arrow). A few hours later, the patient suddenly died. Autopsy showed a large haematoma in the right groyne, expanding to the abdomen and right upper leg with an estimated blood loss of 3 L. Furthermore, the right exter-