title: Comparison of 44-hour and fixed 24-hour ambulatory blood pressure monitoring in dialysis patients.
abstract: The two most commonly used strategies to evaluate dialysis patients' blood pressure (BP) level are 44-hour and 24-hour ambulatory blood pressure monitoring (ABPM). The objective of this study was to find an appropriate 24-hour period that correlated well with the 44-hour BP level and determine the differences between these strategies. In a group of 51 dialysis patients, the authors performed 44-hour ABPM and extracted data for a fixed 24-hour ABPM. The fixed 24-hour ABPM started at 6 am on the nondialysis day. A strong correlation was found between all parameters of 44-hour and the fixed 24-hour ABPM, with paired sample t test showing only small magnitude changes in a few parameters. Both 24-hour ABPM and 44-hour ABPM were superior to clinic BP in predicting left ventricular mass index (LVMI) by multiple regression analysis. It was found that 44-hour ambulatory arterial stiffness index (AASI), but not 24-hour AASI, had a positive association with LVMI (r=0.328, P=.021). However, after adjustment for 44-hour systolic blood pressure, this association disappeared. Fixed 24-hour ABPM is a good surrogate of 44-hour ABPM to some extent, while 44-hour ABPM can provide more accurate and detailed information.
authors.affiliation: Center for Kidney Disease, Second Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China.
authors.forename: Wenjin
authors.initials: W
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Ye
authors.forename: Bing
authors.initials: B
authors.lastname: Tang
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Sun
authors.forename: Ping
authors.initials: P
authors.lastname: Wen
authors.forename: Wenhui
authors.initials: W
authors.lastname: Wu
authors.forename: Xueqing
authors.initials: X
authors.lastname: Bian
authors.forename: Xia
authors.initials: X
authors.lastname: Shen
authors.forename: Junwei
authors.initials: J
authors.lastname: Yang
mesh_terms: D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000502:physiology*; D018660:Blood Pressure Monitoring, Ambulatory / Q000379:methods*; D002940:Circadian Rhythm / Q000502:physiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis* / Q000453:epidemiology / Q000503:physiopathology; D007676:Kidney Failure, Chronic / Q000150:complications / Q000503:physiopathology / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D012044:Regression Analysis; D006435:Renal Dialysis; D012307:Risk Factors; D013997:Time Factors