BioMed Research International / 2014 / Article / Tab 2

Research Article

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

Table 2

Short-term (5-minute) ECG derived data in the two study groups.

VariablesVT group
: 27
No-VT
: 97
P values

mean, ms391 ± 56381 ± 73Ns
variance, ms246 43 Ns
mean, ms293 ± 52304 ± 48Ns
variance, ms247 35 Ns
mean, ms91 ± 3988 ± 25Ns
variance, ms99 86 Ns
RR mean, ms961 ± 142966 ± 137ns
RR variance, ms2707 729 ns
variability index−0.46 −0.35 ns
variability index−0.21 −0.16 ns
variability index1.17 0 1.28 ns

Values are expressed as mean ± SD (compared with unpaired -test) or median [interquartile range 75th percentile–25th percentile] (Mann-Whitney U test).