title: [The electrical mass; a new electrocardiographic index to calculate the muscular mass of the left ventricle].
abstract: We have developed an empirical mathematic formula which allows us to measure the muscular mass of the left ventricle. It expresses, in grams/square meter of corporal surface, the result of the correlation (r = 0.865) between the mass calculated by echocardiography and an index we call "Electric Mass of the Left Ventricle" (E.M.L.V.) and which equals the intrinsic deflection of V6 multiplied by R height in V6, cubed and divided by the corporal surface. The developing of a corrective factor (a factor of correction) allows us to express in grams/square meter the muscular mass measured by the electrocardiogram. The final formula is E.V. = Log. (1 + Nat. Log of the electric mass) + 56.66(3). The values obtained through this formula give us a correlation of r = 0.834.
mesh_terms: D002306:Cardiac Volume; D004452:Echocardiography / Q000379:methods; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D006973:Hypertension / Q000175:diagnosis; D008433:Mathematics; D016276:Ventricular Function
vernacular_title: "La masa eléctrica": un nuevo índice electrocardiográfico para calcular la masa muscular del ventrículo izquierdo.