1) Sokolow M, Lyon TP. The ventricular complex in right ventricular hypertrophy as obtained by uni-polar precordial and limb leads. Am Heart J 1949 ; 38 : 273.
2) Casale PN, Devereux RB, Alonso DR, et al. Im-proved sex-specific criteria of left ventricular hyper-trophy for clinical and computer interpretation of electrocardiograms : validation with autopsy find- ings. Circulation 1987 ; 75 : 565.
3) Molloy TJ, Okin PM, Devereux RB, Kligfield P. Electrocardiographic detection of left ventricular hypertrophy by the simple QRS voltage-duration product. J Am Coll Cardiol 1992 ; 20 : 1180.