A 75 year-old man develops sudden onset of shortness of breath at the orthopedic department. He was admitted for suspected pathological fracture of femur 3 days ago. On examination, his pulse is 122, blood pressure 90/60, respiratory rate 34/min and oxygen saturation is 92%. Lung sounds are clear bilaterally. Heart rhythm is regular with no murmurs or gallops. What is the appropriate immediate step to improve this patient’s condition? A-Intravenous injection of brad spectrum antibiotics B-Intravenous injection of heparin C-Subcutaneous injection of epinephrine D-Electric cardioversion E-Call the cardiology attendant Answer
