Table 1.

Summary table of clinical features of 5 MAD patients.

	Presentation	Arrhythmias	Valvular disease	CMR findings	Management
Patient 1	Sudden cardiac arrest	VF arrest	Bileaflet MVP, moderate MR	Diffuse myocardial fibrosis, LGE inferolateral wall	ICD placement
Patient 2	Syncope	Inducible VT on EP study	Bileaflet MVP, moderate MR	LGE inferior and inferolateral	ICD placement
Patient 3	Follow-up known valvular disease	14.5% VE burden on cardiac event monitor	Myxomatous MV disease, severe MR	Reduced LVEF, diffuse myocardial fibrosis, LGE mid-inferior wall	Percutaneous mitral valve repair with significant decrease in VE burden
Patient 4	Follow-up known valvular disease	Rare VE	Bileaflet MVP, mild-moderate MR	Not performed	Medical management
Patient 5	Follow-up known valvular disease	8.1% VE burden and non-sustained VT on cardiac event monitor	Bileaflet MVP, moderate MR	Myocardial fibrosis, no LGE	Referred for EP consult, medical management

EP, electrophysiology; LGE, late gadolinium enhancement; LVEF, left ventricular ejection fraction; MR, mitral regurgitation; MVP, mitral valve prolapse; VE, ventricular ectopy; VF, ventricular fibrillation; VT, ventricular tachycardia.