Document Detail


Comparison of hemodynamics during hyperthermal immersion and exercise testing in apparently healthy females aged 50-60 years.
MedLine Citation:
PMID:  15487268     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Owing to excessive worries regarding adverse cardiac events, hyperthermal balneotherapy for patients with coronary artery disease is underprescribed. However, very few cardiac events occur in similar heat stress during Finnish sauna bathing. Exercise testing has proven to be a safe diagnostic procedure even in survivors of myocardial infarction. METHODS: We compared the effects of hyperthermal immersion and exercise testing on cardiac hemodynamics in 21 apparently healthy women aged 50-60 years. The maximal symptom-limited bicycle exercise test was performed according to the modified protocol of Wasserman. Hyperthermal immersion was carried out in 40 degrees C water and was completed by increasing the core temperature by about 2 degrees C. The left ventricular function was evaluated using continuous measurement of thoracic electric bioimpedance during both tests. The blood pressure, index of contractility and heart rate were measured directly, whereas the cardiac index, left cardiac work index and systemic vascular resistance index were calculated. RESULTS: The hemodynamic response, as assessed at continuous non-invasive monitoring, showed substantial differences between hyperthermal immersion and exercise testing. Overall, we found a significantly lower hemodynamic load during hyperthermal immersion in comparison with exercise testing. Entering the bath, there was a significant decrease in the left cardiac work, contractility and blood pressure. We recorded a slight increase in the heart rate towards peak hyperthermal immersion. However, other modulators such as the mean arterial pressure, index of contractility, cardiac index and left cardiac work index decreased even below resting values. CONCLUSIONS: Excessive hyperthermal immersion induced a lower hemodynamic load in apparently healthy women than standard maximal exercise testing.
Authors:
Jan Lietava; Branislav Vohnout; Denis Valent; Juraj Celko
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Italian heart journal : official journal of the Italian Federation of Cardiology     Volume:  5     ISSN:  1129-471X     ISO Abbreviation:  Ital Heart J     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-10-18     Completed Date:  2004-12-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  100909716     Medline TA:  Ital Heart J     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  511-6     Citation Subset:  IM    
Affiliation:
Second Department of Internal Medicine, School of Medicine and Teaching Hospital, Comenius University, Bratislava, Slovakia. jan.lietava@faneba.sk
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Blood Pressure Determination
Exercise Test*
Exercise Tolerance / physiology
Female
Heart Rate / physiology
Hemodynamics / physiology*
Hot Temperature*
Humans
Immersion*
Middle Aged
Myocardial Contraction / physiology
Probability
Prospective Studies
Reference Values
Risk Factors
Statistics, Nonparametric

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


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