Intra-QT Spectral Coherence as a Possible Noninvasive Marker of Sustained Ventricular Tachycardia

Figure 2

Median and variance in a short-term (5-minute) ECG recording of the studied variables, RR (a), QT_𝑒 (b), QT_𝑝 (c), and T _e (d).

(a)

(b)

(c)

(d)