Recovery of autonomic nervous activity after myocardial infarction demonstrated by short-term measurements of SDNN

6Citations
Citations of this article
18Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

Objective-Heart rate variability (HRV) has been demonstrated to be a risk factor after acute myocardial infarction (AMI). In the present study serial measurement of SDNN (standard deviation of the mean of qualified NN-interval) in short intervals was used to assess HRV changes after AMI, and determine the role of these as independent risk factors compared to clinical, arrhythmic, ischemic and anamnestic variables. Measurements from a normal healthy middle-aged male population were used as reference (n = 63). Methods-SDNN from a five-minute period during day and night-time, respectively, was examined in 103 patients 1 week (n = 54), 1 month (n = 72) and 12-16 months (n = 54) after infarction. Results-Day SDNN did not change during one-and-a-half years after AMI, and was significantly reduced compared with healthy males. Night SDNN, low after 1 week, with recovery 1 month after AMI, was significantly reduced compared with healthy males early, but not late after AMI. Thus, the study indicated during day-time a continuous abnormal sympathetic preponderance in the course of 16 months after AMI, and during night-time a gradual recovery of parasympathetic preponderance beginning early after AMI. Conclusion-One week after AMI day-time SDNN of <30 ms, and night-time SDNN of <18 ms, age ≥60 years, and myocardial ischemia (Holter monitoring) were independent predictors of 9 years' mortality. One and 12-16 months after AMI reduced day and night-time SDNN had no prognostic implication.

Cite

CITATION STYLE

APA

Vaage-Nilsen, M., Rasmussen, V., Jensen, G., Simonsen, L., & Spange Mortensen, L. (2001). Recovery of autonomic nervous activity after myocardial infarction demonstrated by short-term measurements of SDNN. Scandinavian Cardiovascular Journal, 35(3), 186–191. https://doi.org/10.1080/140174301750305063

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free