by recording pairs of local electrograms from the endocardium and epicardium and by stimulating the ventricle close to one of a pair of electrodes , we measured conduction times in the subendocardial layer ( endo 1-2 ) , in the subepicardial layer ( epi 1-2 ) , and from the endocardium to the epicardium ( endo-epi ) .
C1515017
subendocardial layer
C0014124
endocardium