A rare case of Klebsiella pneumoniae myocardial abscess.

Myocardial abscess of the left ventricular free wall in the absence of infective endocarditis (IE) is very unusual. Most cases are discovered during autopsies and are due to Gram-positive cocci. We present a rare case of Klebsiella pneumoniae causing myocardial abscess of the left ventricular free wall. The patient had no evidence of valvular endocarditis or bacteremia, and the abscess was discovered during coronary artery bypass grafting surgery (CABG).