DOI: 10.1101/508911Dec 31, 2018Paper

Determinants of Heart Rate Recovery and Heart Rate Variability in Lung Cancer Survivors Eligible for Long-Term Cure

BioRxiv : the Preprint Server for Biology
Duc HaMark M Fuster

Abstract

Background: Lung cancer survivors are at increased risk for autonomic dysfunction. We aimed to identify determinants of parasympathetic nervous system (PNS) function as reflected by heart rate recovery (HRR) and heart rate variability (HRV) in lung cancer survivors eligible for long-term cure. Methods: We performed a cross-sectional study of consecutive lung cancer survivors who completed curative-intent therapy for stage I-IIIA ≥1 month previously. We tested a comprehensive list of variables related to baseline demographics, comorbidities, lung cancer characteristics, and physiological/functional measures using univariable and multivariable (MVA) linear regression analyses. We defined HRR as the difference in heart rate (HR) at 1-minute following and the end of the six-minute walk test (6MWT), and HRV the standard deviation of normal-to-normal R-R intervals (SDNN) and root-mean-square-of-successive-differences (rMSSD) from routine single 10-s electrocardiographs (ECGs). Results: In 69 participants, the mean (standard deviation, SD) HRR was -10.6 (6.7) beats. In MVAs, significant independent determinants of HRR [β (95% confidence interval)] were: age [0.17 (0.04, 0,30) for each year] and HR change associated with the 6MWT [0.01...Continue Reading

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