2015, Number 3
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Revista Cubana de Salud y Trabajo 2015; 16 (3)
A test to evaluate the cardiovascular impact of mental demands. Applicability and validity
Almirall HPJ, Almirall HA, Almirall PM, Pérez LVM
Language: Spanish
References: 38
Page: 12-19
PDF size: 369.25 Kb.
ABSTRACT
Introduction: From the heart rate variability (HRV ) a procedure is able to differentiate between behaviors cardiovascular heart disease and healthy subjects in laboratory conditions.
Objectives: To modify the procedure created by Perez and Almirall to be used in field conditions, to evaluate workers realizing their work under mental demands , and to study its predictive validity.
Method: On-site clinical cardiology COINSA of Barquisimeto, Venezuela, with all environmental requirements 6 couples were evaluated, all male, ranging in age from 36-64 years. Of these pairs one was diagnosed with heart disease by the cardiology service of COINSA and evolution of not less than 60 nor more than 180 days. All subjects were matched by age, sex and education, with six healthy and all subject to a procedure that was designed taking into account the results of a test enunciated by Perez and Almirall, and that for our interests has two moment: a) evaluation of HRV at rest, five minutes (baseline), and b) the behavior of HRV, to run an exercise of selection time in a portable personal computer, where 50 stimuli were played and the subject had to choose whether he was common (blue square) or infrequent (yellow square). HRV was assessed by a Polar F7.
Results: The slowdown of HRV was significantly ( p ‹ 0.01) greater in cardiac patients ( 46-72 %) than in healthy (8-12 %) when comparing the baseline with his execution ; 100 % of patients with heart disease had a greater loss of their "sinus arrhythmia ", which makes us think of a greater regional imbalance in the Autonomic Nervous System.
Conclusions: The screen switching and instrumentation in general for the presentation of stimuli seems not to influence the results , confirming the hypothesis that those who have suffered heart disease has a greater slowing of the heart rate variability in a healthy subject . The sample size is very small and does not allow any generalization, but the results are encouraging to continue the path of research.
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