Hypertension and nephrology

[Prognostic significance of stiffness index determined by digital volume pulse method in polycystic kidney disease]

SÁGI Balázs, KÉSŐI Bence, KÉSŐI István, VAS Tibor, CSIKY Botond, NAGY Judit, KOVÁCS Tibor

MAY 20, 2017

Hypertension and nephrology - 2017;21(03)

[Introduction: It is known from previous studies, that in chronic renal failure cardiovascular mortality and morbidity are more frequent than in the general population. The prognostic significance of arterial stiffness on cardiovascular outcomes trials was first demonstrated in end-stage renal disease patients by epidemiological longitudinal studies. Our aim was to assess the prognostic significance of arterial stiffness in polycystic kidney disease. Methods: 55 patients with polycystic kidney disease (PKD) were examined and followed in our clinic. Pulse wave velocity was determined by digital volume pulse (DVP) method, and a so-called stiffness index (SI DVP) was calculated. MDRD formula was used for estimating the glomerular filtration rate (eGFR, mL/min/1.73 m2) to determine renal function. Patients were observed regularly, in every 3-6 months, and we checked lab tests, which assessed the patient’s renal function and cardiovascular events occurred in patients were collected in our outpatient department. Results: Our study involved 55 patients, 21 were male, the mean age was 45±12 years. The average follow-up was 63±32 months. The average value of the stiffness index was 11.11±2.22 m/s. We divided the patients by 11 m/s as cut off point of SI values into two groups and analysed their outcome. In the increased arterial stiffness group (SI >11 m / s) the probability of the combined endpoint occurrence was signi - fi cantly higher than in the group with flexible arteries (χ-square: 4.571; p=0.033). Between the two groups we did not found significant difference in cardiovascular endpoint, but we found a statistically significant difference between the two groups in renal outcomes (χ-square: 5.591; p=0.018). Conclusion: In polycystic kidney disease the increased arterial stiffness may predict the onset of end-stage renal failure. Digital Pulse volume as determined by Pulse Trace system appears an appropriate method for making prognosis in chronic kidney disease.]



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