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2014, Number 3

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Rev Cubana Cardiol Cir Cardiovasc 2014; 20 (3)

Analysis of expired gases during exercise Stress test: Characterization of results in subjects without cardiovascular pathology

Gómez LN, Rivas EE, Crespo FFF

Language: Spanish
References: 25
Page: 166-175
PDF size: 373.32 Kb.


ABSTRACT

With the aim of characterizing the mean values of the functional parameters obtained through the analysis of expired gases during an exercise stress testing, there were studied 38 subjects of both sexes (31.6 % females) and with an average age of 41.97 ± 14.3 years, without cardiovascular disease. Maximal or symptom-limited exercise stress testing were performed and using the Ergocid-AT Plus™ equipment (ICID, Cuba) with a treadmill and a “ramp protocol” for the stress. The participants weregrouped according age and sex, without significant differences of interest in their anthropometric characteristics. Maximum oxygen consumption was higher in men than in women (31.1 ± 9.0 ml/min/Kg vs. 22.9 ± 4.1 ml/min/Kg), and also in younger age groups and at higher level of physical activity. In addition the anaerobic threshold was fundamentally conditioned by the degree of previous physical training of the subjects. Maximum cardiac output was 8.6 ± 1.9 L/min in women and 14.3 ± 3.8 L/min in men; other ergospirometry variables as minute-ventilation, oxygen and carbon dioxide ventilation equivalent as well as systolic volume also fall within physiological ranges. It was found that the methodology used may be valid to evaluate persons without cardiovascular pathologies and also that the values of the variables obtained from the study can serve as reference values for future Cuban studies. A prospective study with a larger amount of apparently healthy subjects selected from a properly age and sex stratified broad population is recommended.


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