Inter-leg systolic blood pressure difference predicts cardiovascular events and mortality in incident hemodialysis patients

Sawako Kato, Bengt Lindholm, Abdul Rashid Qureshi, Hideyuki Mukai, Yukio Yuzawa, Shoichi Maruyama

Research output: Contribution to journalArticle

Abstract

Background: High inter-arm blood pressure difference, a marker of vascular disease, may be difficult to assess in hemodialysis patients with arm arteriovenous fistulae. We investigated if high inter-leg systolic blood pressure difference associates with cardiovascular events and increased mortality in hemodialysis patients. Methods: Among 118 incident Japanese dialysis patients, bilateral leg blood pressure, arm blood pressure, brachial–ankle pulse wave velocity, and ankle–brachial index were measured, and the relative risk associated with inter-leg systolic blood pressure difference and other indices of vascular status was analyzed. Results: During follow-up (median, 46 months), 18 deaths and 75 cardiovascular events occurred in 38 patients. Kaplan–Meier curves showed that higher inter-leg systolic blood pressure difference was associated with overall (log-rank 9.35, p = 0.002) and cardiovascular (log-rank 5.81, p = 0.02) mortality. The period from the start of dialysis therapy to the first cardiovascular event was shorter as inter-leg systolic blood pressure difference increased (log-rank 23.7, p < 0.0001). In Cox hazard models, inter-leg systolic blood pressure difference greater than median independently predicted deaths (relative risk, 3.8; 95% confidence interval, 1.3–13.9) and cardiovascular events (relative risk, 3.9; 95% confidence interval, 1.9–9.21) after adjustments for age, sex, nutritional status, and diabetes, whereas other indices were not related to the risks. For well-nourished, moderately malnourished, and severely malnourished patients, the cumulative number of cardiovascular events in the high–inter-leg systolic blood pressure difference patients were 4.96, 31.44, and 55.18 events per 100 patient-years. Conclusions: Higher inter-leg systolic blood pressure difference associated with increased risk of mortality and cardiovascular events suggesting that wider application of inter-leg systolic blood pressure difference measurements may be warranted in hemodialysis patients.

Original languageEnglish
JournalInternational Journal of Artificial Organs
DOIs
Publication statusAccepted/In press - 01-01-2019

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Blood pressure
Renal Dialysis
Leg
Blood Pressure
Mortality
Dialysis
Arm
Proportional Hazards Models
Medical problems
Hazards
Confidence Intervals
Pulse Wave Analysis
Arteriovenous Fistula

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering

Cite this

@article{d92b74d0725844dfbf97b0eb1cfbb2e8,
title = "Inter-leg systolic blood pressure difference predicts cardiovascular events and mortality in incident hemodialysis patients",
abstract = "Background: High inter-arm blood pressure difference, a marker of vascular disease, may be difficult to assess in hemodialysis patients with arm arteriovenous fistulae. We investigated if high inter-leg systolic blood pressure difference associates with cardiovascular events and increased mortality in hemodialysis patients. Methods: Among 118 incident Japanese dialysis patients, bilateral leg blood pressure, arm blood pressure, brachial–ankle pulse wave velocity, and ankle–brachial index were measured, and the relative risk associated with inter-leg systolic blood pressure difference and other indices of vascular status was analyzed. Results: During follow-up (median, 46 months), 18 deaths and 75 cardiovascular events occurred in 38 patients. Kaplan–Meier curves showed that higher inter-leg systolic blood pressure difference was associated with overall (log-rank 9.35, p = 0.002) and cardiovascular (log-rank 5.81, p = 0.02) mortality. The period from the start of dialysis therapy to the first cardiovascular event was shorter as inter-leg systolic blood pressure difference increased (log-rank 23.7, p < 0.0001). In Cox hazard models, inter-leg systolic blood pressure difference greater than median independently predicted deaths (relative risk, 3.8; 95{\%} confidence interval, 1.3–13.9) and cardiovascular events (relative risk, 3.9; 95{\%} confidence interval, 1.9–9.21) after adjustments for age, sex, nutritional status, and diabetes, whereas other indices were not related to the risks. For well-nourished, moderately malnourished, and severely malnourished patients, the cumulative number of cardiovascular events in the high–inter-leg systolic blood pressure difference patients were 4.96, 31.44, and 55.18 events per 100 patient-years. Conclusions: Higher inter-leg systolic blood pressure difference associated with increased risk of mortality and cardiovascular events suggesting that wider application of inter-leg systolic blood pressure difference measurements may be warranted in hemodialysis patients.",
author = "Sawako Kato and Bengt Lindholm and Qureshi, {Abdul Rashid} and Hideyuki Mukai and Yukio Yuzawa and Shoichi Maruyama",
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Inter-leg systolic blood pressure difference predicts cardiovascular events and mortality in incident hemodialysis patients. / Kato, Sawako; Lindholm, Bengt; Qureshi, Abdul Rashid; Mukai, Hideyuki; Yuzawa, Yukio; Maruyama, Shoichi.

In: International Journal of Artificial Organs, 01.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Inter-leg systolic blood pressure difference predicts cardiovascular events and mortality in incident hemodialysis patients

AU - Kato, Sawako

AU - Lindholm, Bengt

AU - Qureshi, Abdul Rashid

AU - Mukai, Hideyuki

AU - Yuzawa, Yukio

AU - Maruyama, Shoichi

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Background: High inter-arm blood pressure difference, a marker of vascular disease, may be difficult to assess in hemodialysis patients with arm arteriovenous fistulae. We investigated if high inter-leg systolic blood pressure difference associates with cardiovascular events and increased mortality in hemodialysis patients. Methods: Among 118 incident Japanese dialysis patients, bilateral leg blood pressure, arm blood pressure, brachial–ankle pulse wave velocity, and ankle–brachial index were measured, and the relative risk associated with inter-leg systolic blood pressure difference and other indices of vascular status was analyzed. Results: During follow-up (median, 46 months), 18 deaths and 75 cardiovascular events occurred in 38 patients. Kaplan–Meier curves showed that higher inter-leg systolic blood pressure difference was associated with overall (log-rank 9.35, p = 0.002) and cardiovascular (log-rank 5.81, p = 0.02) mortality. The period from the start of dialysis therapy to the first cardiovascular event was shorter as inter-leg systolic blood pressure difference increased (log-rank 23.7, p < 0.0001). In Cox hazard models, inter-leg systolic blood pressure difference greater than median independently predicted deaths (relative risk, 3.8; 95% confidence interval, 1.3–13.9) and cardiovascular events (relative risk, 3.9; 95% confidence interval, 1.9–9.21) after adjustments for age, sex, nutritional status, and diabetes, whereas other indices were not related to the risks. For well-nourished, moderately malnourished, and severely malnourished patients, the cumulative number of cardiovascular events in the high–inter-leg systolic blood pressure difference patients were 4.96, 31.44, and 55.18 events per 100 patient-years. Conclusions: Higher inter-leg systolic blood pressure difference associated with increased risk of mortality and cardiovascular events suggesting that wider application of inter-leg systolic blood pressure difference measurements may be warranted in hemodialysis patients.

AB - Background: High inter-arm blood pressure difference, a marker of vascular disease, may be difficult to assess in hemodialysis patients with arm arteriovenous fistulae. We investigated if high inter-leg systolic blood pressure difference associates with cardiovascular events and increased mortality in hemodialysis patients. Methods: Among 118 incident Japanese dialysis patients, bilateral leg blood pressure, arm blood pressure, brachial–ankle pulse wave velocity, and ankle–brachial index were measured, and the relative risk associated with inter-leg systolic blood pressure difference and other indices of vascular status was analyzed. Results: During follow-up (median, 46 months), 18 deaths and 75 cardiovascular events occurred in 38 patients. Kaplan–Meier curves showed that higher inter-leg systolic blood pressure difference was associated with overall (log-rank 9.35, p = 0.002) and cardiovascular (log-rank 5.81, p = 0.02) mortality. The period from the start of dialysis therapy to the first cardiovascular event was shorter as inter-leg systolic blood pressure difference increased (log-rank 23.7, p < 0.0001). In Cox hazard models, inter-leg systolic blood pressure difference greater than median independently predicted deaths (relative risk, 3.8; 95% confidence interval, 1.3–13.9) and cardiovascular events (relative risk, 3.9; 95% confidence interval, 1.9–9.21) after adjustments for age, sex, nutritional status, and diabetes, whereas other indices were not related to the risks. For well-nourished, moderately malnourished, and severely malnourished patients, the cumulative number of cardiovascular events in the high–inter-leg systolic blood pressure difference patients were 4.96, 31.44, and 55.18 events per 100 patient-years. Conclusions: Higher inter-leg systolic blood pressure difference associated with increased risk of mortality and cardiovascular events suggesting that wider application of inter-leg systolic blood pressure difference measurements may be warranted in hemodialysis patients.

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