Group comparison of HRV parameter changes to meal ingestion.

<p><b>A, B, C</b> shows, in supine position, from pre-ingestion to early after meal ingestion (30min postprandially), HRV parameters’ changes are different in POAG, compared to NTG and Control. There are reductions in HRV LF power nu and HRV LF/HF ratio, and an increase in HRV HF power nu in POAG. <b>D, E, F</b> shows, in standing position, from fasting to 90 minutes after carbohydrate ingestion (maximal response), HRV parameters’ changes are different in NTG, compared to POAG and Control. There is an increase in HRV LF power nu and a decrease in HRV HF power nu in NTG. § <i>P</i>< 0.05, §§ <i>P</i>< 0.01, NTG vs POAG; <i>P</i>< 0.05, Control vs POAG; ¥ <i>P</i>< 0.05, Control vs NTG; data shown as Mean ± SEM.