The Association of Peritoneal Transport Properties with 24-Hour Blood Pressure Levels in Capd Patients

← Objectives We aimed to investigate the effects of peritoneal transport characteristics on blood pressure (BP) parameters, measured by 24-hour ambulatory blood pressure monitoring (ABPM), and on the development of left ventricular hypertrophy (LVH) in continuous ambulatory peritoneal dialysis (CAPD) patients.← Design Cross-sectional and prospective design.← Setting Tertiary-care center.← Patients 25 CAPD patients (11 male, 14 female; mean age 47 ± 14 years) were included. Mean time on CAPD was 22.9 ± 18 months and all patients had been dialyzed for more than 6 months. The patients were divided into high, high-average, low-average, and low transport groups according to peritoneal equilibration test results.← Main Outcome Measures Daytime and nighttime systolic and diastolic BP and left ventricular mass index among the different peritoneal transport groups; changes in BP parameters before and after increase in ultrafiltration.← Results On 24-hour ABPM records, 13 patients (52%) were found to be hypertensive. Both mean systolic and diastolic BP were significantly increased in high-transporter groups compared to low transporters in both daytime and nighttime BP parameters. Left ventricular mass index was higher in high transporters compared to low transporters, without reaching statistical significance: 160 ± 23 vs 119 ± 41 g/m 2 , p > 0.05. Following increase in ultrafiltration, mean systolic (145 ± 13 vs 128 ± 5 mmHg, p < 0.001) and diastolic (96 ± 10 vs 81 ± 3 mm Hg, p < 0.001) BP decreased, and BP levels returned to normotensive levels in 6 (46%) of the 13 hypertensive patients, requiring discontinuation of antihypertensive drugs.← Conclusion Improvement in volume status resulted in a decrease in both daytime and nighttime BP. Differences in peritoneal transport properties were associated with the development of hypertension and LVH.