Hiss, R. G., and Lamb, L. E. Electrocardiographic findings in 122,043
individuals. Circulation, 25:947, 1962. Khan, M. Gabriel Rapid ECG Interpretation, second edition, W. B.
Saunders, Philadelphia, 2003. Schneider, J. P., Thomas, H. E., Kreger, B. E. et al. Newly acquired
left bundle branch block, the Framingham study. Ann. Int. Med.,
90:303. 1979. Surawicz, B., and Knilans, T. K. Chou’s Electrocardiography in Clinical
Practice, W. B. Saunders, Philadelphia, 2001.