Distribution and Localization of Myocardial Fibrosis in Different Cardiomyopathies
(A) List of diseases follow a hierarchical downward prevalence sequence. Cardiac amyloidosis, which has no specific distribution, is a distinctive case. Left ventricle is divided into five regions: anterior, septal, apical, lateral, and inferior. The 17 segments are: basal anterior (1), basal anteroseptal (2), inferoseptal (3), basal inferior (4), basal inferolateral (5), basal anterolateral (6), mid anterior (7), mid anteroseptal (8), mid inferoseptal (9), mid inferior (10), mid inferolateral (11), mid anterolateral (12), apical anterior (13), apical septal (14), apical inferior (15), apical lateral (16), and apex (17). (B) Location of myocardial fibrosis from the layer that is initially involved and damage progression. HCM = hypertrophic cardiomyopathy; LAD = left anterior descending artery; LCX = left circumflex artery; RCA = right coronary artery.