Extract PPG pulse-wave features

Measures foot-to-systolic rise time, pulse amplitude, dicrotic and diastolic fiducials, reflection and augmentation indices, pulse width, and optional ECG-to-PPG pulse transit time and pulse-wave velocity.

Usage

pulseWaveFeatures(
  x,
  peaks = NULL,
  ecg_peaks = NULL,
  distance_m = NULL,
  assay_name = NULL
)

Arguments

x

A raw PPG PhysioExperiment.

peaks

Optional systolic peak table from ppgDetectPulses().

ecg_peaks

Optional ECG R-peak table containing sample and optionally channel.

distance_m

Optional ECG-to-PPG path length in metres for PWV.

assay_name

Optional raw PPG assay name.

Value

A data frame with one row per pulse and waveform/PTT/PWV features.

References

Elgendi M (2012). On the analysis of fingertip photoplethysmogram signals. Current Cardiology Reviews, 8:14-25. doi:10.2174/157340312801215782

Examples

simulation <- make_ppg(n_time = 5000)
head(pulseWaveFeatures(simulation$pe))
#>   channel beat foot_sample systolic_sample systolic_time_sec rise_time_ms
#> 1       1    1         103             123             0.976          160
#> 2       1    2         208             227             1.808          152
#> 3       1    3         312             330             2.632          144
#> 4       1    4         416             436             3.480          160
#> 5       1    5         520             540             4.312          160
#> 6       1    6         624             644             5.144          160
#>   pulse_amplitude dicrotic_notch_sample diastolic_sample reflection_index
#> 1        1.093694                   133              147         47.08573
#> 2        1.115187                   238              254         46.19351
#> 3        1.077151                   331              332         97.32652
#> 4        1.113700                   447              459         46.70862
#> 5        1.074340                   550              563         46.67595
#> 6        1.105202                   655              667         45.27318
#>   augmentation_index pulse_width_ms ptt_ms pwv_m_s
#> 1          52.914269            840     NA      NA
#> 2          53.806492            832     NA      NA
#> 3           2.673476            832     NA      NA
#> 4          53.291382            832     NA      NA
#> 5          53.324054            832     NA      NA
#> 6          54.726817            832     NA      NA