For each QRS index, searches [loc + 0.2 * fs, loc + 0.5 * fs] for
the absolute maximum and records its global index.
Usage
morie_dsp_t_wave(ecg, qrs_locs, fs = 360)
Arguments
- ecg
ECG vector.
- qrs_locs
QRS indices (1-based) from a detector like
morie_dsp_pan_tompkins.
- fs
Sampling frequency (Hz). Default 360.
Value
Integer vector of T-peak indices.
References
Rangayyan & Krishnan (2015), Ch. 4, sec. 4.8.
Examples
set.seed(1)
beat <- c(rep(0, 130), 0.1, 0.4, 1.2, -0.3, rep(0, 40), 0.25, rep(0, 185))
ecg <- rep(beat, 5) + rnorm(1800, 0, 0.02)
qrs <- which(ecg > 1)[c(TRUE, diff(which(ecg > 1)) > 100)]
str(morie_dsp_t_wave(ecg, qrs_locs = qrs, fs = 360), max.level = 1)
#> int [1:5] 274 615 948 1295 1737
