Table 3.

Isthmus Parameters

Parameter	Nonsus. Reentrant VT	Sus. Reentrant VT	Nonmappable VT
SR discontinuity- perimeter (ms)	32.83±9.51	22.78±1.83	23.42±5.95
Isthmus surface area (cm2)	4.75± 1.06*	10.04± 1.09*	4.11± 0.41*
Width of entrance/exit (mm)	7.04±1.52**	9.30±0.75**	--
# entrance+exit points	2.00±0.00	2.71±0.19	--
SR discontinuity-entrance/exit (ms)	16.25± 3.48**	10.11±1.02**	10.75±2.78
Primary Path gradient (mm/ms)	0.22±0.06	0.32±0.02	0.33±0.03
Primary Path r2	0.95±0.01	0.96±0.01	0.93±0.03

SR = sinus rhythm; ms = milliseconds; mm = millimeters, Nonsus = nonsustained, Sus = sustained

^*p < 0.05, One-Way ANOVA

^**p < 0.05, unpaired t-test