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Helical CT features of arrhythmogenic right ventricular cardiomyopathy
Fumiko Kimura1, Fumikazu Sakai, Yasunari Sakomura
1Department of Radiology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan. fumikok@rad.twmu.ac.jp
Insights
Arrhythmogenic right ventricular cardiomyopathy (ARVC) involves heart muscle changes. Helical CT can diagnose ARVC by identifying fatty tissue in the ventricles, aiding in early detection and management.
Area of Science:
- Cardiology
- Radiology
- Medical Imaging
Background:
- Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a heart muscle disorder of unknown origin.
- It is characterized by electrical instability due to fatty or fibrous tissue replacing the right ventricular myocardium.
Purpose of the Study:
- To evaluate the utility of helical computed tomography (CT) in diagnosing ARVC.
- To identify characteristic CT findings indicative of ARVC.
Main Methods:
- Analysis of helical CT scans for specific cardiac abnormalities.
- Identification of fatty infiltration in the right and left ventricles and ventricular septum.
Main Results:
- Characteristic findings include right ventricular dilatation and fatty infiltration, particularly in the anterior, apical, and inferior walls.
- Fatty tissue in the ventricular septum is a useful diagnostic marker for ARVC.
- Standard nongated helical CT can be helpful in diagnosing ARVC with knowledge of characteristic findings.
Conclusions:
- Helical CT, particularly with knowledge of characteristic findings, can be a valuable tool for diagnosing ARVC.
- CT imaging aids in identifying the fatty and fibrous tissue replacement characteristic of ARVC.
Abstract:
Arrhythmogenic right ventricular cardiomyopathy (ARVC), also known as arrhythmogenic right ventricular dysplasia, is a disorder of the heart muscle of unknown origin. It is characterized by electrical instability of the heart as a result of replacement of the right ventricular myocardium with fatty or fibrous fatty tissue. Dilatation of the right ventricle; fatty tissue in conspicuous trabeculae of the right ventricle, especially in the anterior wall, apex, and inferior (diaphragmatic) wall; and a scalloped appearance (bulging) of the right ventricular wall are characteristic findings at helical computed tomography (CT) that may be used to diagnose ARVC. Fatty tissue in the left ventricle and ventricular septum is seen relatively frequently in ARVC, and fat in the ventricular septum is another useful finding for diagnosis of ARVC with helical CT. ARVC is usually diagnosed on the basis of clinical or pathologic findings, and electron-beam CT is superior to nongated helical CT in assessment of abnormal right ventricular function. However, with knowledge of the characteristic findings, standard nongated helical CT can be helpful in diagnosing ARVC.