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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: BACKGROUND, RESULTS. Meshes: Action Potentials, Adult, Aged, Aged, 80 and over, Contrast Media, Electrocardiography, Female, Gadolinium, Heart Conduction System, Humans, Linear Models, Magnetic Resonance Imaging, Male, Middle Aged, Myocardial Infarction, Myocardium, Necrosis, Predictive Value of Tests, Risk Assessment, Tachycardia, Ventricular, Time Factors.
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Is delayed enhancement morphology on cardiac magnetic resonance imaging correlated with signal-averaged electrocardiogram and QT dispersion in myocardial infarction? Context: In patients with myocardial infarction, ventricular tachycardia is related with nonconductive ventricular scar. Cardiac magnetic resonance imaging is an excellent modality to evaluate myocardial scars in myocardial infarction. Furthermore, late potential obtained from signal-averaged electrocardiogram and QT dispersion are both well-known parameters for predicting lethal arrhythmias. To investigate whether the pattern of necrotic scar tissue visualized by delayed enhancement on cardiac magnetic resonance imaging is associated with late potential and QT dispersion, we measured late potential and QT dispersion in 27 patients (68 +/- 8 years old) with a prior myocardial infarction. Cardiac magnetic resonance imaging was also obtained using a 1.5-tesla cardiac magnetic resonance scanner, and delayed enhancement was analyzed in the short axis of the left ventricle. By conducting this, we tried to determine whether the pattern of necrotic scar tissue predicts lethal ventricular arrhythmias. Semiquantitative patchy scores were identified as the mean patchy score and the maximum patchy score in each patient. There were 9 patients with a positive late potential and 18 patients with a negative late potential. Patients with positive late potentials had significantly larger mean (1.7 +/- 0.3) and maximum (2.2 +/- 0.6) patchy scores than patients with negative late potentials (mean, 1.3 +/- 0.2, P < .05; maximum, 1.7 +/- 0.4, P < .05). QT dispersion was significantly correlated with the number of slices showing delayed enhancement, which reflects the size of necrotic scar tissue (r = .59, P < .05).
assistant
These findings suggest that the pattern of necrotic scar tissue visualized by delayed enhancement with cardiac magnetic resonance imaging was correlated to the predictive indices of lethal ventricular arrhythmias. Final Decision: yes