The electrical mass; a new electrocardiographic index to calculate the muscular mass of the left ventricle
Diaz Barreiro, L.A.; Aspe y Rosas, J.
Archivos del Instituto de Cardiologia de Mexico 48(4): 746-753
1978
ISSN/ISBN: 0020-3785 PMID: 697467 Document Number: 134282
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.