Association of Intradialytic Hypertension with Left Ventricular Mass in Hypertensive Hemodialysis Patients Enrolled in the Blood Pressure in Dialysis (BID) Study

作者：Shamir Amith Roy; Karembelkar Ameet; Yabes Jonathan; Yao Yi; Miskulin Dana; Gassman Jennifer; Ploth David; Negrea Lavinia; Pain Susan; Rahman Mahboob; Kwong Raymond Y; Zager Philip; Jhamb Manisha^*

来源：Kidney & Blood Pressure Research, 2018, 43(3): 882-892.

DOI：10.1159/000490336

• Intradialytic hypertension
• Hemodialysis
• Left ventricular mass

Background/Aims: Intradialytic hypertension (IDH), or paradoxical rise in blood pressure (BP) during hemodialysis (HD) is associated with increased morbidity and mortality. The association between IDH and increased left ventricular mass (LVM), a well-known risk factor for adverse cardiovascular outcomes in HD patients, has not been studied. The aim of our study is to evaluate the cross-sectional association of intradialytic change in BP with cardiac structure and function measured by cardiac MRI in hypertensive HD patients enrolled in the multi-center Blood Pressure in Dialysis (BID) clinical trial. Methods: Participants in the BID study were categorized into 3 groups based on average change (Delta) in systolic blood pressure (SBP) (post-HD SBP minus pre-HD SBP) during HD over a 1 month period: group 1 - patients with an increase in SBP >= 10mm Hg during HD (IDH); group 2 -patients with SBP decrease of greater >= 10mm Hg during HD; group 3 - patients with SBP increase or decrease by <10mm Hg during HD. LVM index (LVMI) was measured using cardiac MRI, which were centrally read. Baseline characteristics were compared in the 3 groups and multivariable regression models were fitted for the adjusted association of IDH with LVMI. Results: Among the 80 participants, 7 (8.8%) had IDH and had average Delta SBP 17.0 +/- 10.1 mmHg during HD. Patients with IDH were less likely to be diabetic, had lower pre-dialysis SBP and lower percent interdialytic weight gain as compared to the other 2 groups (p=0.02, p <0.001 and p =0.02 respectively). In multivariable regression analyses, IDH was significantly associated with LVMI (adjusted mean difference relative to SBP decreased group [95% confidence interval (CI)] = 12.5 [3.6, 21.5], p =0.01) after adjusting for age, sex, diabetes, IDWG%, pre-HD SBP and beta blocker use. Every 1 mm rise in Delta SBP during HD was associated with 0.2 g/m(2) increase in LVMI in adjusted models (p =0.04). Conclusion: IDH is independently associated with higher LVMI in hypertensive HD patients and may contribute to increased cardiovascular events.

• 出版日期2018