Five years following quadruple CABG surgery, this 64-year-old patient started experiencing atypical chest pain.
Are any of the bypass grafts or anastomoses stenotic or occluded? Is there an extra-cardiac cause behind the patient‘s symptoms?
Acute graft thrombosis, myocardial infarction, myocardial ischemia due to graft stenosis, aortic dissection, pulmonary embolism, pericarditis, lung tumor.
Although all four grafts appeared patent, there was a mild stenosis at the proximal anastomosis of one of the venous grafts (to the first obtuse marginal branch (OM1) of the LCx) with atretic distal runoff. In the posterolateral region, supplied by this vessel, myocardial hypoattenuation was found, suggesting ischemia (see figure).
Dual Source Cardiac CT can detect graft stenosis or tight anastomoses and consequent myocardial ischemia efficiently. The data can be used to plan intervention (stent size, approachability) or redo surgery if it is deemed necessary by the clinician.
Authors: Pal Suranyi, Christian Thilo, Heon Lee, U. Joseph Schoepf
See corresponding news: Cardiac: Bypass Grafts
See corresponding protocol: Cardiac: Bypass Grafts
See corresponding case: Thrombosed venous bypass graft – pseudoaneurysm following coil embolization