The study purpose is to evaluate the morphological, functional and electrophysiological characteristics of the right ventricle before and after ajmaline in patients diagnosed with Brugada syndrome as well as to correlate CMR findings and substrate size.
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Electrocardiographic changes
Timeframe: 1 day during Electrocardiography
MRI changes of left and right ventricular function
Timeframe: 1day during MRI
CMR parameters changes of the right and left ventricle function
Timeframe: 1 day during CMR
Electrical substrate changes of the right ventricle
Timeframe: 1 day after ICD implantation