Document detailing the query protocol to download data from Wanda
Physiology data analysis preprocessing steps: (by Amrita Pal, 07/17/2019)
a. Artifact Rejection
- Clean up short period of noise. Example of noise in data evident from respiration and ECG data
- Identify long period (>30s) of missing data, look at the whole time series by using
- For CNAP blood pressure data BP, first, do Low pass filter at 50 Hz. Transform→Digital filter->FIR→Low Pass at 50 Hz
Then select Analysis→ Hemodynamic→ ABP classifier for the BP data. This will help identify the systole and diastole easier. 
- For ECG: (for ECG data you could use comb band stop, a type of notch filter found at Transform→Digital Filter) at 60Hz to remove the noise from mains, recommend doing it before Frequency Domain Data analysis) a. Go to Analysis->find cycle
, select maximum threshold at 0.5 mV and put the qrs peak on the maximum, b. Identify missed beat. Interpolate or add missed beat manually by going through the whole ECG time series.