Real-time electrocardiogram P-QRS-T detectiondelineation algorithm based on quality-supported analysis of characteristic templates
A low-latency and accurate algorithm for real-time detection of the ECG P-QRS-T waves. Response time about 8-ms for detection of the QRS complexes. Response time about 198-ms and 177-ms for detection of P- and T-waves, respectively. Relative high operating characteristics for real-time detection of P-, QRS-, and T-waves. Evolving correction of generated clusters for increasing the final accuracy of the algorithm.
dwt discrete wavelet transform db daubechies wavelet family alc arc length curve asc area under the slope curve asc? asc filtered curve msc mean slope curve alc(i?) amplitude of alc at the location of the local extremum d[n] ecg first-order derivative asc(i?) amplitude of asc at the location of the local extremum msc(i?) amplitude of msc at the location of the local extremum aqrs asc amplitude at the location of the qrs complex estimated on the basis of beginning of the signal alcm alc amplitude average value at the location of r-waves ascm asc amplitude average value at the location of r-waves mscm msc amplitude average value at the location of r-waves alcr alc amplitude at the location of a detected r-wave ascr asc amplitude at the location of a detected r-wave mscr msc amplitude at the location of a detected r-wave ?a threshold of asc ct updating waveform template cl waveform template ? cross-correlation c correlation coefficient ? min al and ? max al ? min al and ? max al ? min al and ? max al ? min al and ? max al thresholds of acceptable arc length ? min n and ? max n ? min n and ? max n ? min n and ? max n ? min n and ? max n thresholds of acceptable number of local extremums all arc length of a window of length l nml number of local extremums in a window of length l tt t-wave template tut updated t-wave template se sensitivity p+ positive predictivity sp specificity mrt mean response time rmse root mean square error qtdb qt database mitdb mit-bih arrhythmia database eecp enhanced external counter pulsation