Key result
The new GLRT detector using mean shape information achieved a higher detection probability compared to the previous detector and turbulence slope at a fixed false alarm rate.
The new GLRT detector incorporating mean shape information significantly improves the detection probability of heart rate turbulence compared to previous methods.
Answers are grounded in this paper and cite their sources.
May improve HRT detection in ECG analysis; leaves open clinical utility for risk stratification pending validation.
A generalized likelihood ratio test (GLRT) statistic is proposed for detection of heart rate turbulence (HRT), where a set of Karhunen-LoEve basis functions models HRT. The detector structure is based on the extended integral pulse frequency modulation model that accounts for the presence of ectopic beats and HRT. This new test statistic takes a priori information regarding HRT shape into account, whereas our previously presented GLRT detector relied solely on the energy contained in the signal subspace. The spectral relationship between heart rate variability (HRV) and HRT is investigated for the purpose of modeling HRV "noise" present during the turbulence period, the results suggesting that the white noise assumption is feasible to pursue. The performance was studied for both simulated and real data, leading to results which show that the new GLRT detector is superior to the original one as well as to the commonly used parameter turbulence slope (TS) on both types of data. Averaging ten ventricular ectopic beats, the estimated detection probability of the new detector, the previous detector, and TS were found to be 0.83, 0.35, and 0.41, respectively, when the false alarm probability was held fixed at 0.1.
No takes yet. Share an insight, caveat, or question.
Smith et al. (2009) studied Heart rate turbulence. New generalized likelihood ratio test (GLRT) detector using mean shape information vs. Previous GLRT detector and turbulence slope (TS) was evaluated on Detection probability at a fixed false alarm probability of 0.1. The new GLRT detector using mean shape information achieved a higher detection probability compared to the previous detector and turbulence slope at a fixed false alarm rate.
Synapse has enriched 10 related papers. Consider them for comparative context: