Document Detail


Influence of the maximum heart rate attained during exercise testing on subsequent heart rate recovery.
MedLine Citation:
PMID:  20146781     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Abnormal heart rate recovery (HRR) following exercise testing has been shown to be a predictor for adverse cardiovascular events. The actual maximum heart rate (MHR) attained during the exercise test does not however have a distinct significance in traditional HRR assessment. The objective of this study was to investigate the role of MHR in HRR. METHODS: This prospective study consisted of 164 patients (62% male, mean age 53.7 + or - 11.7 years) who were referred for a symptom-limited standard Bruce Protocol treadmill exercise test, based on clinical indications. The patients were seated immediately at test completion and the heart rate (HR) recorded at one and two minutes postexercise. A normal HRR was defined as a HR drop of 18 beats per minute or more at the end of the first minute of recovery. The HRR profile of patients who reached > or = 85% of their maximum predicted heart rate (MPHR) during peak exercise were then compared to HRR profile of those who could not. RESULTS: One hundred twelve patients (Group A) achieved a MHR > or = 85% of MPHR during peak exercise whereas 52 patients (Group B) did not. Chi-square analysis showed a higher incidence of normal HRR in Group A compared to Group B (p = 0.029). Analysis of variance with repeated measures showed that group A had a greater HRR at the first minute F(1,162)= 6.98, p = <0.01) but not the second minute (F(1,162)=1.83, p = .18) postexercise. CONCLUSION: There is a relation between the peak heart rate attained during exercise and the subsequent HRR. A low peak heart rate increases the likelihood of a less than normal HRR. Assessment of the entire heart-rate response seems warranted for more thorough risk-stratification.
Authors:
Sina Zaim; Joel Schesser; Linda S Hirsch; Ronald Rockland
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc     Volume:  15     ISSN:  1542-474X     ISO Abbreviation:  Ann Noninvasive Electrocardiol     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-02-11     Completed Date:  2010-05-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9607443     Medline TA:  Ann Noninvasive Electrocardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  43-8     Citation Subset:  IM    
Affiliation:
Division of Cardiology, UMDNJ-New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07101, USA. szaimmd@hotmail.com
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Electrocardiography / methods,  statistics & numerical data
Exercise Test / methods*,  statistics & numerical data*
Female
Heart Rate*
Humans
Male
Middle Aged
Prospective Studies
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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