A patient developed breathlessness and chest pain, on second postoperative day after a total hip replacement. Echo-cardiography showed right ventricular dilatation and tricuspid regurgitation.What is the most likely diagnosis -: (A) Acute MI, (B) Pulmonary embolism, (C) Hypotensive shock, (D) Cardiac tamponate
Answer is B. Onset of chest pain and breathlessness, together with echocardiographic evidence of right ventricular dilatation and tricuspid regurgitation after a high risk procedure (for thromboembolism) like total hip replacement suggests a diagnosis of pulmonary embolism.