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- Open Access
Prognostic value of late gadolinium enhanced MRI in patients underwent coronary artery bypass graft surgery; long term follow up data
© Lee et al; licensee BioMed Central Ltd. 2015
- Published: 3 February 2015
- Cardiovascular Event
- Left Ventricular Ejection Fraction
- Coronary Artery Bypass Graft
- Unstable Angina
- Adverse Cardiac Event
It has not been well evaluated whether late gadolinium enhanced (LGE)-MRI can provide prognostic information in patients who underwent coronary artery bypass graft (CABG) surgery, especially in patients with preserved left ventricular ejection fraction (LVEF). Further, long-term follow-up data after MRI and CABG surgery are not available. The purpose of this study was to evaluate the impact of myocardial viability assessment by LGE-MRI on prognosis in patients who underwent CABG surgery.
A total 145 consecutive patients (age 64.1 ± 8.8 years; male 28%) with who underwent cine- and LGE-MRI before CABG surgery were investigated. The presence and transmurality (0, absent; 1, 1-25%; 2, 26-50%; 3, 51-75%; 4, 76-100%) of LGE was visually determined using a standard 17-segment AHA model. LGE score was defined as the sum of each segment scale. The outcome measures were adverse cardiac events (cardiac death, nonfatal myocardial infarction [MI], heart failure [HF] and unstable angina) and cardiovascular events (adverse cardiac events and stroke).
Myocardial viability assessment by LGE-MRI has impact on prognosis after CABG surgery in patients with preserved LVEF. This observation may extend the indication of viability assessment to those without severe LV dysfunction before CABG surgery.
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