Figure 3From: T Wave Alternans in high arrhythmic risk patients: Analysis in time and frequency domains: A pilot studySpectral analysis of the resultant vectored absolute mean TA for the ischaemic cardiomyopathy group (group 1). The y axis represents the magnitude of spectral components and the x axis represents frequency in Hertz. Only the range from 0 to 40 Hertz is shown for clarity.Back to article page