Association of Autoantibodies against M2-Muscarinic Acetylcholine Receptor with Atrial Fibrosis in Atrial Fibrillation Patients

Figure 2

Immunohistochemical analysis of M2 receptor, TGF-β1, and CTGF expression. Representative sections of the immunohistochemistry- (IHC-) stained left atrial appendage tissue of patients in the non-AF and AF group. (a) M2 receptor; (b) TGF-β1; (c) CTGF.

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