USMLE Forum Archives - USMLE Step 1 - lep29
lep29
babbu5508 - 04-30-11 23:59
That evening, the patient develops pleuritic chest pain, tachypnea, and tachycardia. Pulse oximetry reveals a oxygen saturation of 74%. An
electrocardiogram is performed, which reveals a right bundle branch block with right axis deviation. A chest x-ray film is normaI. Which of the
following is the most likely diagnosis?
/ A. Cardiac arrhythmia
/ B. Fat embolism
/ C. Myocardial infarction
/ D. Pneumonia
/ E. Pulmonary embolism
babbu5508 - 04-30-11 23:59
That evening, the patient develops pleuritic chest pain, tachypnea, and tachycardia. Pulse oximetry reveals a oxygen saturation of 74%. An
electrocardiogram is performed, which reveals a right bundle branch block with right axis deviation. A chest x-ray film is normaI. Which of the
following is the most likely diagnosis?
/ A. Cardiac arrhythmia
/ B. Fat embolism
/ C. Myocardial infarction
/ D. Pneumonia
/ E. Pulmonary embolism
The correct answer and explanation will be available after you answer.
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#3
Re: lep29
babbu5508 - 05-15-11 01:24 My answer is: e.
The correct answer is E. Pleuritic chest pain, tachypnea, and tachycardia are hallmark signs of a pulmonary embolus. ECG changes such as a right bundle branch block with right axis deviation are seen in approximately 25% of patients.
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