... Wave Alternans analysis, QT Dispersion analysis, Heart Rate Variability (HRV) analysis, and Obstructive Sleep Apnea Syndrome (OSAS). Features ... analysisAdvanced diagnostic tools for analysis of QT Dispersion, HRV(time domain,frequency domain,Lorenz plot), Atrial Fibrillation/ ... certain drugs for cardiac arrhythmia Heart Rate Variability (HRV): Analysis method for time domain, frequency domain and ...