title: Assessment of the reductions in night-time blood pressure and dipping induced by antihypertensive medication using a home blood pressure monitor.
abstract: BACKGROUND
  Night-time blood pressure (BP) is strongly associated with hypertensive target organ damage; however, no previous studies have compared home BP monitor measurements of the reduction in night-time BP induced by antihypertensive medications with those obtained with ambulatory BP monitors.
  
  
  METHODS
  As part of the Japan Morning Surge-Target Organ Protection study, in which candesartan (thiazide diuretics were added, if needed) was administered to hypertensive patients in the morning or at bedtime, 50 hypertensive patients had their night-time home and ambulatory BP successfully measured at the baseline and 6 months. In addition, three night-time home BP readings were taken during sleeping hours (at 2, 3, and 4 o'clock) for 6 months.
  
  
  RESULTS
  The mean reduction in night-time BP did not differ significantly between home and ambulatory BP monitoring (10.4 ± 17.9/6.0 ± 12.0 vs. 13.3 ± 14.6/7.6 ± 8.9 mmHg, P = 0.219/0.344), but the differences varied among individual patients. The reduction in night-time BP according to home BP monitoring was significantly correlated with the value obtained with ambulatory BP monitoring (r = 0.51/0.38, P < 0.001/=0.006). The reduction in night-time SBP according to home BP monitoring was significantly correlated with the reductions in left ventricular mass index (r = 0.385, P = 0.013, N = 41) and Sokolow-Lyon voltage (r = 0.335, P = 0.035, N = 40).
  
  
  CONCLUSIONS
  Home BP monitoring produces estimates of mean night-time BP reductions comparable to those from ambulatory monitoring, while the differences varied among individual patients. The reduction in night-time home BP according to home BP monitoring is significantly correlated with the reduction in left ventricular hypertrophy.
authors: Division of Cardiovascular Medicine, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan.
authors: Joji
authors: J
authors: Ishikawa
authors: Motohiro
authors: M
authors: Shimizu
authors: Eijiro
authors: E
authors: Sugiyama Edison
authors: Yuichiro
authors: Y
authors: Yano
authors: Satoshi
authors: S
authors: Hoshide
authors: Kauzo
authors: K
authors: Eguchi
authors: Kazuomi
authors: K
authors: Kario
mesh_terms: D000368:Aged; D000959:Antihypertensive Agents / Q000627:therapeutic use*; D018660:Blood Pressure Monitoring, Ambulatory / Q000295:instrumentation*; D002940:Circadian Rhythm; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006801:Humans; D006973:Hypertension / Q000188:drug therapy / Q000503:physiopathology*; D007564:Japan; D008297:Male; D008875:Middle Aged
chemical_list: D000959:Antihypertensive Agents