Right ventricular outflow tract ventricular tachycardia (RVOT VT)

• RVOT VT patients have more frequent premature ventricular contractions than AC patients and usually no structural or mechanical alterations

Sarcoidosis and systemic sclerosis

• PET-FDG could be reasonably recommended and a positive test raise the suspicion for cardiac sarcoidosis

Myocarditis

• Endomyocardial biopsy - although showing a low sensitivity - remains the gold standard for diagnosis

Dilated cardiomyopathy

• Left dominant AC can mimic dilated cardiomyopathy
• Frequent arrhythmias and subepicardial fibro-fatty replacement on CMR favors AC diagnosis

Athletes heart

• AC is aggravated by athletic activity
• Abnormal measures of deformation strain imaging favor AC diagnosis
• CMR should be performed in unclear cases
• CMR alterations alone, without abnormalities on ECG and Holter monitoring should favor athlete-induced changes and not AC diagnosis

Brugada syndrome

• Overlap exists between AC and Brugada syndrome phenotypes including RV wall motion abnormalities
• The clinical implication is unclear