Abstract
A 33-year-old man was admitted to our hospital for shortness of breath on exertion. His symptoms started suddenly a week before admission when he was driving a car and worsened daily. He was amateur football player and had no history of hypertension, dyslipidemia, diabetes mellitus, smoking, or leg injury. On admission, an arterial pulse oxygen saturation monitor showed that his arterial blood oxygen saturation was 94% with room air. His blood pressure was 114/82 mm Hg and his pulse rate was 92/min with regular rhythm. His height was 162 cm and body weight was 62 kg. No other outstanding physical abnormalities were observed. Laboratory data showed slightly an elevated C-reactive protein level of 0.87 mg/dL with a normal white blood cell count of 6100 cells/mL. Arterial blood sampling revealed a normal CO2 level of 41 mm Hg and pH of 7.42 with low oxygen tension (52 mm Hg). An ECG showed a small S wave in lead I and a small Q wave and inverted T wave in …
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