anatomic sites samples included aorta , main pulmonary artery , tricuspid valve , mitral valve , right and left coronary arteries , os cordis , right atrium , left atrial appendage , right and left ventricles ( free wall ) , left ventricle-papillary muscle , interventricular septum , crista supraventricularis , and left bundle branch .
C0026264
mitral
C0225897
left ventricle