THE A B C CARDIOGRAM OF RIGHT VENTRICULAR HYPERTROPHY

Although there are now generally recognized criteria for diagnosing right ventricular (R.V.) hypertrophy from a standard 12-lead cardiogram plus one or more right-sided chest leads (V3R, V4R.) (Wilson et al., 1944; Goldberger, 1947; Myers et al., 1948; Sokolow and Lyon, 1949; Myers 1950; Fraser and Turner, 1955; Camerini et al., 1956; Goodwin and Abdin, 1959) the cardiogram in patients with mitral stenosis is often disappointingly normal. The present work was undertaken to determine the signs of R.V. hypertrophy in the A BC cardiogram (Trethewie, 1953, 1958) and to see whether the diagnosis of the R.V. hypertrophy could be made more accurate thereby.