RT Journal T1 Heredity in essential hypertension and nephrosclerosis: A geneticclinical study of 200 propositi suffering from nephrosclerosis JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1949 FD April 23 VO 139 IS 17 SP 1235 OP 1236 DO 10.1001/jama.1949.02900340111033 UL http://dx.doi.org/10.1001/jama.1949.02900340111033 AB The subject is of general interest to the specialist, general practitioner and medical student. The book is valuable because of an extensive review of the literature concerning not only the role of heredity in hypertension but also the incidence of hypertension in various age groups in the population. The author does not accept the conclusions of previous writers because of the small series of cases and inadequate controls. Unfortunately, although the book is short and contains numerous summaries, there is considerable ambiguity in the terminology used. This may in part be the result of the translation.The author defines essential hypertension as a systolic pressure of 160 mm. or more and a diastolic pressure of 100 mm. or more, although he includes persons under 50 years with a systolic pressure of 160 alone. This reviewer believes that these criteria are too high, and the author admits that the low incidence