Association between circadian variation of heart rate and mortality among critically ill patients: a retrospective cohort study.

ABSTRACT:

Background

Heart rate (HR) related parameters, such as HR variability, HR turbulence, resting HR, and nighttime mean HR have been recognized as independent predictors of mortality. However, the influence of circadian changes in HR on mortality remains unclear in intensive care units (ICU). The study is designed to evaluate the relationship between the circadian variation in HR and mortality risk among critically ill patients.

Methods

The present study included 4,760 patients extracted from the Multiparameter Intelligent Monitoring in Intensive Care II database. The nighttime mean HR/daytime mean HR ratio was adopted as the circadian variation in HR. According to the median value of the circadian variation in HR, participants were divided into two groups: group A (≤ 1) and gr

SUBMITTER: Zhang J 

PROVIDER: S-EPMC8840314 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature