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Ann Thorac Surg 2004;77:344-346
© 2004 The Society of Thoracic Surgeons

How to do it

Visualization of intramuscular left anterior descending coronary arteries during off-pump bypass surgery

Senri Miwa, MD, PhDa, Takeshi Nishina, MDa, Koji Ueyama, MDa, Takayuki Kameyama, MDa, Tadashi Ikeda, MD, PhDa, Kazunobu Nishimura, MD, PhDa, Masashi Komeda, MD, PhD*a

a Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

Accepted for publication April 23, 2003.

* Address reprint requests to Dr Komeda, Department of Cardiovascular Surgery, Kyoto University, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
e-mail: masakom{at}kuhp.kyoto-u.ac.jp

In off-pump coronary artery bypass surgery, an appropriate method for intraoperative evaluation of grafts and vessels has been awaited. We report the usefulness of a 15-MHz linear transducer for this purpose. A 15-MHz linear transducer with a SONOS 5500 (Philips Medical Systems, Best, Netherlands) was applied epicardially in off-pump coronary artery bypass surgery patients. Vascular anatomy was easily discerned when the transducer was applied in an appropriate way. In 6 patients, intramuscular coronary arteries were easily detected, and in all of these patients, anastomoses were successful. The shapes of the anastomoses were very clearly shown, and the flow and its phase in the bypass graft or coronary artery were measured with synchronization of electrocardiograms in all patients. The total left internal thoracic artery (LITA) flow (28.4 ± 6.8 mL/s) and the pattern of the flow was dominantly diastolic in all patients. The 15-MHz linear transducer system (Philips) is very useful for detecting intramuscular left anterior descending coronary arteries and may become one of the standard tools for intraoperative evaluation in off-pump coronary artery bypass surgery.




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