CTICasesMitral Annular Disjunction
Imaging findings
Cardiac MRI, particularly on three-chamber cine views, demonstrates a distinct physical separation or gap between the left atrial wall-mitral valve junction and the basal ventricular myocardium. This gap represents atrial displacement of the mitral valve hinge point, allowing hypermobility of the mitral annulus during systole.
Key takeaways
Mitral annular disjunction is an abnormal anatomical variant of the mitral valve apparatus that is closely associated with mitral valve prolapse, severe myxomatous degeneration, and ventricular arrhythmias. Recognizing this entity on cardiac MRI or echocardiography is important as it is a recognized risk factor for sudden cardiac death.
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