TY - JOUR T1 - THe vascular effect of the thiazide diuretics AU - CONWAY J Y1 - 1963/02/01 N1 - 10.1001/archinte.1963.03620260063011 JO - Archives of Internal Medicine SP - 203 EP - 207 VL - 111 IS - 2 N2 - While it seems likely that the fall in blood pressure produced by the thiazide diuretics is a consequence of their sustained diuretic action, it has not been possible to demonstrate this with certainty, and the mode of action of diuretics in reducing blood pressure remains unexplained. Although there is a reduction in extracellular fluid and plasma volumes over the first few days after the drug is administered,1-3 these are later restored to their initial levels.4-7 Furthermore, it has been shown that cardiac output, though initially reduced, returns to normal levels after a period of weeks of continued therapy. Since the blood pressure continues to be reduced, the calculated total peripheral resistance is also reduced, and it has been inferred that the drug affects the blood vessels themselves.6 The purpose of this report is to acquire direct evidence by plethysmography for this action on the peripheral blood vessels SN - 0003-9926 M3 - doi: 10.1001/archinte.1963.03620260063011 UR - http://dx.doi.org/10.1001/archinte.1963.03620260063011 ER -