Background And Objectives: Patients receiving maintenance hemodialysis (HD) have a high incidence of cardiac events, including arrhythmia and sudden death. Intradialytic hypotension (IDH) is a common complication of HD and is associated with development of reduced myocardial perfusion, a potential risk factor for arrhythmia.
Design, Setting, Participants, & Measurements: We analyzed data from the Monitoring in Dialysis study, which used implantable loop recorders to detect and continuously monitor electrocardiographic data from patients on maintenance HD (=66 from the United States and India) over a 6-month period (=4720 sessions). Negative binomial mixed effects regression was used to test the association of IDH (decline in systolic BP >20 mm Hg from predialysis systolic BP) and IDH (decline in systolic BP 0-20 mm Hg from predialysis systolic BP) with clinically significant arrhythmia (bradycardia≤40 bpm for ≥6 seconds, asystole≥3 seconds, ventricular tachycardia ≥130 bpm for ≥30 seconds, or patient-marked events) during HD.
Results: The median age of participants was 58 (25th-75th percentile, 49-66) years; 70% were male; and 65% were from the United States. IDH occurred in 2251 (48%) of the 4720 HD sessions analyzed, whereas IDH occurred during 1773 sessions (38%). The number of sessions complicated by least one intradialytic clinically significant arrhythmia was 27 (1.2%) where IDH occurred and 15 (0.8%) where IDH occurred. Participants who experienced IDH (versus not) had a nine-fold greater rate of developing an intradialytic clinically significant arrhythmia (incidence rate ratio, 9.4; 95% confidence interval, 3.0 to 29.4), whereas IDH was associated with a seven-fold higher rate (incidence rate ratio, 7.2; 95% confidence interval, 2.1 to 25.4).
Conclusions: IDH is common in patients on maintenance HD and is associated with a greater risk of developing intradialytic clinically significant arrhythmia.
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| http://dx.doi.org/10.2215/CJN.06810619 | DOI Listing |
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