Key result
Heart rate variability analysis using time and time-frequency indices showed strong agreement (r=0.97 to 0.99, p<0.01) with classical gas exchange methods for determining the first ventilatory threshold in patients with chronic heart failure.
Why the study?
Does Heart Rate Variability (HRV) analysis accurately estimate the first Ventilatory Threshold (VT1) compared to classical methods in patients with Chronic Heart Failure?
Observational (n=18)
Blinded assessors
No
Does Heart Rate Variability (HRV) analysis accurately estimate the first Ventilatory Threshold (VT1) compared to classical methods in patients with Chronic Heart Failure?
This study investigates whether heart rate variability can serve as an alternative to classical methods for detecting the first ventilatory threshold in heart failure patients to guide exercise rehabilitation.
The first Ventilatory Threshold (VT 1 ) has been shown to assess exercise tolerance and help in the exercise rehabilitation prescription of Chronic Heart Failure patients (CHF). However, VT 1 cannot always be detected in CHF by classical methods. Previous investigations revealed that the assessment from Heart Rate Variability (HRV) analysis gives an accurate estimation of VT 1 in trained subjects.
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Pierre‐Marie Leprêtre (2013) conducted an observational in Chronic Heart Failure (n=18). Heart Rate Variability (HRV) analysis vs. Classical VT1 determination (gas exchange) was evaluated on Agreement between VT1 and HRVT in terms of VO2, heart rate, and power (r=0.97 to 0.99, p=<0.01). Heart rate variability analysis using time and time-frequency indices showed strong agreement (r=0.97 to 0.99, p<0.01) with classical gas exchange methods for determining the first ventilatory threshold in patients with chronic heart failure.
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