The authors describe a simple method to perform left ventricular biopsies during open heart surgery. An automatic gun shaped device is used by one hand of the surgeon: the sample is obtained in a few seconds, at any time of the surgical procedure. It consists of a transmural piece of tissue, averaging 18 mm3 in quantity. The device has been used in 20 patients who underwent coronary artery revascularization. All the biopsies were successful. No complications occurred.
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