Chest pain is a common presenting complaint in the emergency room of which acute aortic syndrome is a sinister cause associated with high morbidity. A contrast enhanced CT aortogram is often performed for initial evaluation at the first instance of suspicion. We present a patient with Stanford Type A intramural haematoma complicated by haemopericardium and acute cardiac tamponade and highlight the relevant CT signs that would alert the managing physician to urgent echocardiogram correlation and emergent cardiothoracic intervention.