Table 2.

Criteria for cardiac involvement.

Major criteria	Minor criteria
(a) High-grade atrioventricular block or fatal ventricular arrhythmia	(f) Abnormal ECG findings: Ventricular arrhythmias, bundle branch block, axis deviation, or abnormal Q waves
(b) Basal thinning of the ventricular septum or abnormal ventricular wall anatomy	(g) Perfusion defects on myocardial perfusion scintigraphy
(c) Left ventricular contractile dysfunction or focal ventricular wall asynergy	(h) Endomyocardial biopsy: Monocyte infiltration and moderate or severe myocardial interstitial fibrosis
(d) 67 Ga citrate scintigraphy or 18F-FDG PET reveals abnormally high tracer accumulation in the heart
(e) Gadolinium-enhanced MRI reveals delayed contrast enhancement of the myocardium