Scatter plots of the Spectral Area Ratio (SAR) against the three time-domain parameters for the VT (n=10) and non-VT patients (n=14):
 

SAR plotted vs. QRS duration in patients with sustained VT (stars), and non-VT patients (diamonds)	diamonds: non-VT stars: VT
SAR plotted vs. V40 (rms voltage during the terminal portion of the QRS) in patients with sustained VT (crosses), and non-VT patients (squares)	squares: non-VT crosses: VT
SAR plotted vs. LAS (duration of the the terminal portion of the QRS, below 40 uV) in patients with sustained VT (crosses), and non-VT patients (circles)	circles: non-VT crosses: VT