Table 2 Electrocardiogram and blood pressure parameters.
From: Association of cardiac and vascular changes with ambient PM2.5 in diabetic individuals
Heart rate variability (HRV) (24 h): time domain | |
|---|---|
RMSSD | Root mean square of successive differences |
SDNN | Standard deviation of NN (normal-to-normal) |
pNN50 | Percentage of adjacent NN-intervals which differ more than 50 ms |
Heart rate variability (HRV) (5 min at rest): frequency domain | |
HR | Heart rate |
TP | Total power (approximately = 0.40 Hz) |
LFa | Low frequency band (0.04-0.15 Hz) |
HFa | High frequency band (0.15-0.40 Hz) |
LF/HF | Low-to-high frequency power ratio |
Repolarization events (5 min at rest) | |
QTc | Bazett-corrected QT interval (correction: QT/sqrt(NN)) |
QT norm | Normalized QT variance |
QTVI | QT variability index |
T wave amplitude | Amplitude of T wave |
T wave complexity | Principal component analysis of T wave |
Variability of T wave complexity | Standard deviation of T wave complexity |
Blood pressure | |
BPsys | Systolic blood pressure |
BPdia | Diastolic blood pressure |