[Mitral valve replacement after previous coronary artery bypass grafting with functioning left internal thoracic artery graft: effectiveness of the method using a direct vision retrosternal approach; report of a case].

Performing a redo-sternotomy when a mammary artery graft is patent can be rather difficult. We previously reported a redo-sternotomy technique involving direct visualization with a retrosternal dissection (DR) method using a Kent's retractor. The DR method in detail is as follows: 1) A midline skin incision is extended to the abdomen about 5 cm. 2) The bilateral costal arches are divided from the rectal muscle. 3). A pair of retractors is placed under the costal arch. 4) A stainless steel wire is applied to the previous sternal wire at the center of the sternum. 5) The retractor and sternal wire are lifted up using the Kent's retractor to widen the retrosternal space. 6) The sternum and sub-sternal tissue are carefully divided using an electronic scalpel or metal retractor with an entirely sternal length. 7) Routine sternotomy is performed using a Stryker. Herein, we report a patient who had undergone cardiac surgery, coronary artery bypass grafting (CABG), using a left internal mammary artery and mitral annuloplasty 2 years previously, and then developed mitral regurgitation caused by infectious endocarditis. He successfully underwent redo-sternotomy and mitral valve replacement using the DR method. In a patient with a patent internal mammary artery, the DR method greatly reduces the risk of graft injury.

[Usefulness of the axillary artery perfusion in open heart surgery in a patient with severe ascending aortic calcification].

Because of high-aging Japanese society, high-risk patients with multiple co-morbidities have been increasing in regular open-heart surgery. Especially, extensive aortic atherosclerosis with severe calcification that involves the ascending aorta can complicate the choice of sites of cannulations and aortic cross-clamping for cardiopulmonary bypass. To date, the standard peripheral arterial cannulation site in such cases has been the common femoral artery;however, this approach carries the risk of atheroembolism due to retrograde aortic perfusion, or it is undesirable in case of severe iliofemoral disease. Recently, it has been reported that arterial perfusion through the axillary artery provides sufficient antegrade aortic flow associated with fewer atheroembolic complications. In this paper, we report 3 successful cases of valvular surgeries in which axillary artery cannulation was used to avoid complications of brain. In cases of extensive aortic atherosclerosis with severe calcification, arterial perfusion through the axillary artery is a safe and effective method to provide sufficient arterial inflow during cardiopulmonary bypass, and is an excellent alternative to femoral artery cannulation.