Correlation of the precordial and endocardial ventricular electrocardiogram

EGG Changes in Pectus Excavatum (Funnel Chest)

“…R was unaltered or increased. A late R' represents the depolarisation of the basal parts of the right and pos-sibly also of the left ventricle, together with the upper part of the interventricular septum (6,15,20). R' is to be found at V, when the "mean activation vector" for this part, i. e. the third vector (20), is orientated forwards and to the right (18) (normally it is upwards, backwards and to the right).…”

Right Bundle-Branch Block

“…In particular, in the presence of an RSR' complex of normal duration and with a normal intrinsicoid deflection, the differentiation between incomplete right bundle-branch block and a normal variant may be impossible. Although some investigators12 attribute the presence of 2 …”