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[Disorders of 24-h rhythm of blood pressure in patients with chronic glomerulonephritis].

AIM
To characterize 24-h profile of blood pressure (BP) and to clarify prognostic significance of 24-h BP variability in patients with chronic glomerulonephritis (CGN) with intact renal function and hypofunction of the kidneys.


MATERIAL AND METHODS
A total of 38 hypertensive CGN patients (29 males and 9 females, mean age 37.9 +/- 12.4 years) entered the trial. All the patients had systolic BP (SBP) > 140 mm Hg and/or diastolic BP (DBP > 90 mm Hg.


RESULTS
Twenty patients with renal hypofunction (creatinine > 1.4 mg/dl) had significantly higher (p < 0.05) SBP, day and 24-h SBP duration, high variability of day-time and 24-h SBP. Significantly higher mean day-time, night-time and 24-h SBP, SBP day-time and 24-h duration SBP duration, variability of SBP and DBP for a day and 24-h, respectively, were observed in 15 patients with left ventricular hypertrophy. Of prognostic significance in relation to renal survival estimated by Cox in 21 patients in multifactorial analysis were blood creatinine level, glomerular filtration rate, the patient's age, SBP duration for day, night and 24 hours. In multifactorial analysis, the final model included only age of the patient and blood creatinine.


CONCLUSION
CGN patients with renal hypofunction had higher SBP and its variability associated with left ventricular variability.