Saddle pulmonary thromboembolism

A 27-year-old previously healthy man was presented to the emergency department with acute onset breathlessness since 9 h. He denied a history of fever, cough, chest pain and haemoptysis. There was no history of chest trauma. On examination, he was in respiratory distress with a respiratory rate of 40/min. His oxygen saturation was 85% by pulse oximetry while breathing ambient air. His pulse was regular at a rate of 150/min and …