Validação do software HRVCAM para avaliação da frequência cardíaca e da variabilidade da frequência cardíaca

Abstract

Validation study performed with healthy adults at a Brazilian higher education institution to validate HRVCam software for heart rate (HR) and heart rate variability (HRV) measurements. Sociodemographic and health data were collected and the HR and HRV were evaluated by means of a webcam and the FC Polar‚ S810i monitor, which was the method chosen for the comparison. The following variables were evaluated and collected: heart rate (HR), RR mean (iR-R), standard deviation of all normal RR intervals recorded in a time interval, expressed in ms (SDNN), square root of (rMSSD), high frequency (AF), low frequency (BF) and the ratio between low frequency and high frequency (BF / AF). The Shapiro-Wilk test was applied to test the normality of the data. The Shapiro-Wilk Test was applied to test the normality of the data; Pearson correlation coefficient (r) for analysis of possible correlations between the two instruments; to analyze the agreement between the methods was used the effect size calculated based on generalized linear model and the Bland-Altman plots. The significance level established for all analyzes was p <0.05. A total of 102 participants were evaluated, 52% of them male; 83,3% were in the age range of 18 to 29,9 years and 84,3% lived without partners. There was good agreement and significant correlations between the methods for all variables: HR (r= 0,99), RRmean (r= 0,99), SDNN (r= 0,96), RMSSD (r= 0,93), HF (r= 0,61), LF (r= 0,59) e LF/HF (r= 0,84). Bias ranged from -7.74 to 0.55 and was higher for LF/HF measurements. The effect size ranged from 0,0008 to 0,282, reflected in small differences for all measurements, except for RMSSD; LF and LF/HF in which the differences were moderate. This work proposed a validation methodology for a measurement instrument and presented consistent results that corroborate the use of HRVCam as a HR and HRV meter