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- W1970258268 abstract "Abnormalities of diurnal blood pressure (BP) rhythm (nondipping) are well-described in dialysis patients, and have prognostic importance. It is controversial whether successful renal transplantation (RTx) improves diurnal BP rhythm. To date, no study has attempted to define and model the evolution of diurnal BP rhythm profiles from dialysis to engraftment, focusing on the immediate (4-6 weeks) and medium-term (>1 year) postengraftment periods.To test if kidney transplantation normalizes the BP profile, ambulatory blood pressure monitoring (ABPM) was performed in 20 living related transplants (age, 30.3+/-5.1 years; 11 males, on dialysis for 25.6 months) 1 month preRTx and repeated 1 month and >1 year (ABPM3) after successful RTx. Dipping was defined as a sleep-to-awake ratio>0.92 (for systolic BP) and >0.90 (for diastolic BP).PreRTx only 15% patients were dippers. At 1 month postRTx (creatinine clearance, 65.8 ml/min), all patients were complete nondippers. However, after >1 year postRTx (creatinine clearance, 70.4 ml/min), 40% were now dippers. Most importantly, overall, 30% of the patients improved significantly their circadian rhythm (35.3% of the initial preRTx nondippers). Despite successful renal transplantation, 55% patients maintained unchanged their nondipping profile throughout all three ABPM recordings. The only determinants of long-term postRTx circadian rhythm are the contemporary level of the renal function and the baseline, dialysis dipping profile: SBP3 sleep-to-awake ratio is related with serum creatinine3 (r=0.58, P=0.001), creatinine clearance (r=-0.41, P=0.036) and SBP1 sleep-to-awake ratio (r=0.48, P=0.034); similarly DBP3 sleep-to-awake ratio is related with serum creatinine3 (r=0.63, P=0.001), creatinine clearance (r=-0.471, P=0.036) and SBP1 sleep-to-awake ratio (r=0.53, P=0.016). In all, 57% of the variance in dipping status can be attributed and explained by the contribution of renal function and initial circadian variability.Half of the nondipper dialysis patients maintain a permanently abnormal circadian rhythm, despite successful RTx. In the short term, RTx is associated with a highly abnormal diurnal profile, exclusively related to ciclosporin dose and levels. However, in the longer term, renal transplantation leads to a significant improvement of the circadian blood pressure profile, influenced by the renal function level and by the pretransplantation dipping profile." @default.
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- W1970258268 date "2005-11-01" @default.
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- W1970258268 title "Dynamics of the Circadian Blood Pressure Profiles after Renal Transplantation" @default.
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- W1970258268 doi "https://doi.org/10.1097/01.tp.0000167003.97452.a8" @default.
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