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Ann Thorac Surg 1998;65:1437-1439
© 1998 The Society of Thoracic Surgeons
a Department of Cardiovascular Surgery, University of Freiburg, Freiburg, Germany
b Department of Pathology, University of Freiburg, Freiburg, Germany
Accepted for publication November 19, 1997.
Address reprint requests to Dr Lutter, Department of Cardiovascular Surgery, University of Freiburg, 55 Hugstetter St, D-79106 Freiburg, Germany
e-mail: (lutter{at}ch11.ukl.uni-freiburg.de)
Histologic examination of the human myocardium has been performed several days, weeks, and months after transmyocardial laser revascularization. We performed microscopic examinations 2 hours postoperatively. In addition to the patent channel (diameter, 1 mm) and a 1- to 2-mm rim of necrosis, a 1- to 3-mm zone of myofibrillary degeneration was found. This additional reversible injury immediately after transmyocardial laser revascularization could explain the higher mortality rate in patients with reduced left ventricular function.
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