The three main vectors of the ventricular activation process in the normal human heart

Forças Anteriores Proeminentes do QRS Durante Suboclusão Transitória do Tronco da Coronária Esquerda

“…Isso explica a ausência da convexidade inicial normal à direita do loop QRS (despolarização ventricular) no plano horizontal, dependente do vetor septal 1 AM (ou vetor Penaloza-Tranchesi). 10 Em seguida, o estímulo é direcionado para a região médioseptal ou parasseptal esquerda, bloqueada por inúmeras áreas do sistema de Purkinje, deslocando as forças para a frente e para a esquerda, resultando em forças anteriores proeminentes (FAP). A Figura 4 mostra dois casos em que a anatomia trifascicular do ramo esquerdo do feixe de His é evidente.…”

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).…”

Comparative Study of Electrocardiogram, Vectocardiogram, Coronary Circulation and Myocardial Metabolism in Chronic Cor Pulmonale

“…Evidently, one cannot explain all the EKG and VCG patterns on the sole basis of myocardial hypoxia. Some of these are cer tainty due to an increased right ventricular work resulting in hypertrophy of the wall, septum and especially of the crista supraventricularis (30,37,44). The EKG and VCG tracings are then of a classical type and do not offer any interpretation prob lems.…”