Table 1.

Classification on myopathy, called by the acronym EHRA.

EHRAs	Histology	Clinical correlation
I	Hypertrophy and myocytolysis of cardiomyocytes. Absence of fibrosis or interstitial changes	Isolated AF, genetic disease, diabetes mellitus
II	Predominance of fibrosis (collagen deposition). Normal cardiomyocytes	Elderly and smoking
III	Mixture of classifications I and II	Heart failure and valvulopathies
IV	Alteration of the interstitial matrix with no collagen accumulation. Accumulation examples: amyloid, fat, inflammatory cells, among others	Amyloidosis, inflammatory diseases, granulomatosis, among others