Twenty-three coronary bypass graft patients were evaluated by a contrast-enhanced computed tomography (CT) technique to determine graft patency. Four to six 4.8-second sequenced scans with a 1-second interscan interval were obtained in each patient during the hand injection of 25-30 ml of contrast medium in a peripheral vein. Patency of grafts was determined by a characteristic contrast enhance...

The shape of a bypass graft plays an important role on its efficacy. Here, we investigated flow through two vascular graft designs-with and without cuff at the anastomosis. We conducted Digital Particle Image Velocimetry (DPIV) measurements to obtain the flow field information through these vascular grafts. Two pulsatile flow waveforms corresponding to cardiac cycles during the rest and the exc...

An ostial stenosis of the left internal mammary artery graft anastomosed to the left anterior descending artery was responsible for unstable angina in a patient with a previous coronary artery bypass graft. A T-shape arterectomy was performed between the left subclavian artery and left internal mammary artery. Successful revascularization of the lesion was achieved with a carotid-to-subclavian ...

Twenty-three coronary bypass graft patients were evaluated by a contrast-enhanced computed tomography (CT) technique to determine graft patency. Four to six 4.8-second sequenced scans with a 1second interscan interval were obtained in each patient during the hand injection of 25-30 ml of contrast medium in a peripheral vein. Patency of grafts was determined by a characteristic contrast enhancem...

The proximal anastomosis of the apicoarotic bypass is technically demanding. We describe our novel surgical technique to reinforce the proximal anastomosis of the apicoaortic bypass. After moving circular muscle of the left ventricle (LV) under ventricular fibrillation, an inverted tube graft is inserted into LV through the opening of the apex. Then, end-to-end anastomosis is made with horizont...

A 64-year-old man was referred to our hospital with Methicillin-resistant Staphylococcus aureus (MRSA) infection following infrainguinal arterial reconstruction. As repeated MRSA sepsis occurred, we decided to remove the infected graft with distal revascularization via circuitous graft tunneling to avoid serious infections and allow limb salvage. An iliofemoro bypass was performed via an extra-...

Aortobifemoral bypass (ABFB) thrombosis is not uncommon, and when the artery of a renal graft is implanted on a bypass the risk of graft loss is high. We report the case of a 48-year-old woman with a previous history of ABFB under antiplatelet therapy and a kidney allograft implanted on the vascular prosthesis, who presented with acute limb ischemia and severe renal impairment. Imaging techniqu...

Saphenous vein bypass pseudoaneurysm is rare but fatal complication after coronary bypass surgery. Pseudoaneurysm is managed either with a surgical or percutaneous approach. This patient underwent quadruple coronary artery bypass grafting 10 years earlier and was referred for recurrence of angina. Coronary and graft angiography revealed a pseudoaneurysm in the saphenous vein graft supplying the...

Optimal graft design has been an objective of many researchers to find correlations between hemodynamics and graft failure. Compared to planar grafts, the helical graft configurations improve hemodynamic performance including the promotion of flow mixing and reduction of flow stagnation regions. In order to evaluate the advantages and disadvantages of the suggested helical type bypass graft mod...