Association of Ambulatory Blood Pressure with All-Cause Mortality and Cardiovascular Outcomes in Peritoneal Dialysis Patients

Abstract

<b><i>Background:</i></b> Ambulatory blood pressure monitoring is the gold standard for the diagnosis of hypertension, but its effects on all-cause mortality and cardiovascular outcomes in peritoneal dialysis (PD) patients remain uncertain. We aimed to investigate the association between ambulatory blood pressure and clinical outcomes in PD patients. <b><i>Methods:</i></b> A prospective, observational cohort study was conducted in PD patients enrolled from March 2001 to July 2018 and followed until October 2019. Blood pressure was evaluated using 24-h ambulatory blood pressure monitoring. The endpoints included all-cause mortality, cardiovascular mortality, and cardiovascular events. Multivariable Cox regression was used to identify the associations between ambulatory blood pressure and endpoints. Subsequently, multivariable logistic regression was conducted to identify factors associated with elevated pulse pressure (PP). <b><i>Results:</i></b> A total of 260 PD patients (154 men, 59.2%) were recruited. The median follow-up duration was 40.7 months. Our studies revealed that PP was an independent predictor of all-cause mortality (hazard ratio [HR], 1.018; 95% CI, 1.001–1.034; <i>p</i> = 0.032), cardiovascular mortality (HR, 1.039; 95% CI, 1.017–1.061; <i>p</i> < 0.001), and cardiovascular events (HR, 1.028; 95% CI, 1.011–1.046; <i>p</i> = 0.001). Systolic blood pressure was an independent predictor of cardiovascular mortality (HR, 1.023; 95% CI, 1.007–1.040; <i>p</i> = 0.005) and cardiovascular events (HR, 1.018; 95% CI, 1.006–1.030; <i>p</i> = 0.003). Vascular calcification was significantly associated with elevated PP (OR, 3.069; 95% CI, 1.632–5.772; <i>p</i> = 0.001). <b><i>Conclusion:</i></b> 24-h ambulatory PP was the most significant predictor of all blood pressure indicators for clinical outcomes in PD patients.

Alpha 2‐Heremans‐Schmid glycoprotein gene polymorphism (rs4918) is associated with coronary artery calcification in incident peritoneal dialysis patients

“…Previous studies have shown that arterial stiffness is closely related to the increase in pulse pressure, 21 and a large amount of evidence shows the importance of vascular calcification in arterial stiffness 22–24 . In our previous studies, it was also found that pulse pressure was closely related to vascular calcification in PD patients 25 . Therefore, it is necessary to control the blood pressure and other risk factors of vascular calcification in PD patients.…”

“…[22][23][24] In our previous studies, it was also found that pulse pressure was closely related to vascular calcification in PD patients. 25 Therefore, it is necessary to control the blood pressure and other risk factors of vascular calcification in PD patients.…”

Home Pulse Pressure Predicts Death and Cardiovascular Events in Peritoneal Dialysis Patients

“…In PD patients, the increase in PP was significantly associated with all-cause mortality [ 45 , 47 , 52 , 62 ], cardiovascular mortality [ 45 , 52 , 62 ], and cardiovascular events [ 62 ], even after adjustment for SBP. Nevertheless, a large cohort study involving 2770 patients found an inverse association between PP short-term mortality and a direct one with long-term increased mortality [ 46 ].…”