Question by J. Delyaei, MD, Santa Clara, Calif., and answered by R.S. Tharratt, MD, MPVM March 24, 2008
A 90-year-old man with a five-year history of chronic obstructive pulmonary disease complains of worsening shortness of breath for the past several months. When he lies down, he feels fine, but when he stands up, he feels unwell. He denies chest pain. His medical history includes...