Table 1.

Patient cohort repolarization dynamics with pacing CL=550ms

	LV Dysfunction (n=53)	Preserved LV (n=18)	p-value
APV-ALT
k-score	2.8±4.4	0.7±3.3	0.06
k-score≥1.7,n(%)	18(34)	2(11)	0.06
Amplitude, μV	21.9±39.7	2.5±4.6	0.06
APD ALTERNANS
mean APD, ms	250±35	239±28	0.25
mean ΔAPD, ms	6.0±3.9	4.6±5.0	0.23
Complex APD Oscillations (%mean APD)	2.5±1.6	1.9±2.1	0.27
Complex APD Oscillations≥2.3%,n(%)	22(42)	5(28)	0.30
COMBINED ALTERNANS INDEX
k-score≥1.7 OR Complex Oscillations≥2.3%,n(%)	32(60)	5(28)	0.02