Comparison of Heart Rate Variability in Thai Older Adults with Hypertension, Pre-Hypertension, and Normotension

Figure 1

HRV index in the study population grouped by BP classification. Data were presented as mean ± SD. values were derived using the independent t-test considering participant characteristic differences in each BP group. in the HT group versus the normal BP group. ^# in the HT group versus the pre-HT group. BP, blood pressure; HT, hypertension; SDNN, standard deviation of NN intervals; RMSSD, root mean square of successive RR interval differences; pNN50, percentage of successive RR intervals that differ by more than 50 ms; LF power, low frequency; HF power, high frequency; LF/HF, ratio of LF-to-HF power.

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