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Create Simulated ECG with PQRST Morphology

Source: R/ecg-data.R
make_ecg_pqrst.Rd

Generates a PhysioExperiment object containing synthetic ECG data with physiologically realistic P, Q, R, S, and T wave components. Returns both the PhysioExperiment and a data.frame of known fiducial points for validation testing of waveform delineation algorithms.

Usage

make_ecg_pqrst(
  n_time = 10000,
  n_channels = 1,
  sr = 500,
  heart_rate = 72,
  noise_sd = 0.02
)

Arguments

n_time

Number of time points (default: 10000, i.e., 20 seconds at 500 Hz).

n_channels

Number of ECG channels (default: 1).

sr

Sampling rate in Hz (default: 500).

heart_rate

Heart rate in beats per minute (default: 72).

noise_sd

Standard deviation of baseline noise (default: 0.02).

Value

A list with two components:

pe

PhysioExperiment object with the simulated ECG signal.

fiducials

A data.frame with columns: beat, r_peak, p_peak, q_point, s_point, t_peak, qrs_onset, qrs_offset (all in sample indices).

References

Goldberger, A.L., et al. (2000). "PhysioBank, PhysioToolkit, and PhysioNet: Components of a new research resource for complex physiologic signals." Circulation, 101(23), e215–e220. doi:10.1161/01.CIR.101.23.e215

Clifford, G.D., Azuaje, F. & McSharry, P.E. (2006). Advanced Methods and Tools for ECG Data Analysis. Artech House.

See also

make_ecg for basic ECG data, ecgDelineate for PQRST waveform delineation, ecgIntervals for computing clinical ECG intervals, ecgDetectRpeaks for R-peak detection.

Examples

result <- make_ecg_pqrst(n_time = 10000, sr = 500, heart_rate = 72)
pe <- result$pe
fiducials <- result$fiducials
head(fiducials)
#>   beat p_peak q_peak r_peak s_peak t_peak q_point s_point qrs_onset qrs_offset
#> 1    1    487    552    567    582    717     552     582       544        590
#> 2    2    904    969    984    999   1134     969     999       961       1007
#> 3    3   1321   1386   1401   1416   1551    1386    1416      1378       1424
#> 4    4   1738   1803   1818   1833   1968    1803    1833      1795       1841
#> 5    5   2155   2220   2235   2250   2385    2220    2250      2212       2258
#> 6    6   2572   2637   2652   2667   2802    2637    2667      2629       2675