
Right ventricular arrhythmia in the absence of arrhythmogenic dysplasia: MR imaging of myocardial abnormalities.
PURPOSE: To evaluate right ventricular abnormalities with magnetic resonance (MR) imaging in patients with arrhythmia but without arrhythmogenic dysplasia. MATERIALS AND METHODS: In 53 patients being evaluated for right ventricular arrhythmia and 15 control subjects, MR imaging was performed to evaluate fixed thinning, fatty replacement, or reduced systolic wall thickening or motion. A diagnosis of idiopathic right ventricular outflow tract tachycardia or indeterminate was assigned for each patient, and the severity of arrhythmia was categorized. RESULTS: Right ventricular abnormalities were revealed in 32 (60%) of the 53 patients: fixed thinning in 27 (84%), fatty replacement in eight (25%), and reduced wall thickening or motion in 31 (97%). Right ventricular abnormalities were found in 35 (76%) of 46 patients with idiopathic right ventricular outflow tract tachycardia and in seven (39%) of 18 patients with indeterminate diagnoses (P = .022). CONCLUSION: Mild right ventricular abnormalities are likely sources for arrhythmias, even in the absence of arrhythmogenic right ventricular dysplasia.
Duke Scholars
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Related Subject Headings
- Ventricular Outflow Obstruction
- Tachycardia, Ventricular
- Statistics, Nonparametric
- Sensitivity and Specificity
- Prospective Studies
- Nuclear Medicine & Medical Imaging
- Myocardium
- Middle Aged
- Male
- Magnetic Resonance Imaging
Citation

Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Ventricular Outflow Obstruction
- Tachycardia, Ventricular
- Statistics, Nonparametric
- Sensitivity and Specificity
- Prospective Studies
- Nuclear Medicine & Medical Imaging
- Myocardium
- Middle Aged
- Male
- Magnetic Resonance Imaging