The presence of inducible ischemia on dobutamine/atropine MRI stress testing was associated with an increased risk of future myocardial infarction or cardiac death (HR 3.3; 95% CI 1.1-9.7).
Cohort (n=279)
Does dobutamine/atropine MRI stress testing predict myocardial infarction or cardiac death in patients with poor echocardiograms?
Dobutamine/atropine MRI stress testing provides significant prognostic value for predicting myocardial infarction and cardiac death in patients with poor echocardiographic windows.
Hazard Ratio: 3.3 (95% CI 1.1–9.7)
BACKGROUND: Regional assessments of left ventricular (LV) wall motion obtained during MRI cardiac stress tests can be used to identify myocardial injury and ischemia, but the utility of MRI stress test results for the assessment of cardiac prognosis is not known. METHODS AND RESULTS: Two hundred seventy-nine patients referred (because of poor LV endocardial visualization with echocardiography) for dobutamine/atropine MRI for the detection of inducible ischemia were followed for an average of 20 months. After MRI stress testing, the occurrence of myocardial infarction, cardiac death, death attributable to any cause, coronary arterial revascularization, and unstable angina or congestive heart failure requiring hospitalization was determined. In a multivariate analysis, the presence of inducible ischemia (hazard ratio 3.3, CI 1.1 to 9.7) or an LV ejection fraction <40% (hazard ratio 4.2, CI 1.3 to 13.9) was associated with future MI or cardiac death independent of the presence of risk factors for coronary arteriosclerosis. CONCLUSIONS: In patients with poor echocardiograms, the results of cardiac MRI stress tests can be used to forecast myocardial infarction or cardiac death.
Hundley et al. (Mon,) conducted a cohort in Suspected inducible ischemia with poor echocardiographic visualization (n=279). Inducible ischemia on dobutamine/atropine MRI vs. Absence of inducible ischemia was evaluated on Future myocardial infarction or cardiac death (HR 3.3, 95% CI 1.1-9.7). The presence of inducible ischemia on dobutamine/atropine MRI stress testing was associated with an increased risk of future myocardial infarction or cardiac death (HR 3.3; 95% CI 1.1-9.7).
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