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

Table 3

Short-term QT-RR and intra-QT spectral coherence values in the two study groups.

Variables	VT group; 𝑁: 27	No-VT; 𝑁: 97	P values
QT𝑒 → RR, coherence	0.223 ± 0.056	0.218 ± 0.049	ns
QT𝑝 → RR, coherence	0.236 ± 0.076	0.230 ± 0.061	ns
𝑇𝑒 → RR, coherence	0.229 ± 0.147	0.214 ± 0.037	ns
QT𝑒 → QT𝑝, coherence	0.207 ± 0.034	0.233 ± 0.089	ns
QT𝑒 → 𝑇𝑒, coherence	0.504 ± 0.170	0.520 ± 0.195	ns
QT𝑝 → 𝑇𝑒, coherence	0.508 ± 0.150	0.607 ± 0.150	0.016

Values are expressed as mean ± SD (unpaired 𝑡-test).