Associação entre os níveis pressóricos iniciais e finais em pacientes renais crônicos com hipertensão intradialítica

Abstract

Objective: To determine the association between systolic blood pressure (SBP) values at the start and end of a hemodialysis (HD) session in intradialytic hypertension (IDH) patients. Methods: This study evaluated the systolic blood pressure patterns in 154 chronic kidney disease patients; among these patients, 18 were identified as having intradialytic hypertension. After patient selection, four consecutive hemodialysis sessions were prospectively evaluated for each patient, totaling 72 sessions. SBP, diastolic blood pressure (DBP), mean arterial pressure (MAP), pulse pressure (PP), and heart rate (HR) were measured at 30, 60, 90, 120, 150, 180, 210, and 240 minutes. PP was calculated using the formula PP= SBP - DBP. The results for each pressure represent the arithmetic mean of the 72 sessions analyzed at the previously specified times. Results: A linear relationship was revealed between the systolic blood pressure levels measured after 30 minutes and those obtained after 240 minutes of HD (r=0.742, p=0.001). This association became stronger at 90 minutes (r=0.937; p <0.001), indicating that for intradialytic hypertension patients, systolic blood pressure values at the start of HD were correlated to systolic blood pressure values at the end of the session. Conclusion: For intradialytic hypertension patients, values obtained at the end of HD are correlated with the initial values. This information could facilitate planning and earlier treatment.