Christopher Kerns, MD

December 31, 2006

A 74-year-old man with a history ofatrial fibrillation presents to hisprimary care physician with dyspneaof 4 days’ duration. The dyspnea developedwhile he was walking as partof his recovery from back surgery forspinal stenosis 1 month earlier. Hebecame progressively short of breathand was unable to carry out his exerciseprogram.