Table 6

Clinical Characteristics of Patients with VAI, Monomorphic VT Versus Polymorphic VT, at the Time of PVR

Inducible VT SubgroupPolymorphic
(n = 6)
Monomorphic
(n = 12)
p Value
Age (yrs)37.0 (23.5–47.0)36.0 (32.5–50.0)0.566
Male (%)4 (60.0%)7 (63.4%)0.750
Transcatheter Melody PVR0 (0.0%)0 (0.0%)1.000
Repeat PVR1 (16.7%)0 (0.0%)0.333
Spatial QRS-T angle (°)125.3 (85.5–157.0)104.9 (87.9–115.8)0.330
Root mean square QRS (mV)1.2 (0.7–1.3)0.9 (0.8–1.2)0.678
QRS duration (ms)156.0 (146.0–162.0)172.0 (152.0–180.0)0.140
Pulmonary regurgitation fraction (%)24 (16.0–52.0)31 (12–65)0.783
MRIs performed5 (83.3%)9 (75.0%)1.000
MRI RV volume (ml/m2)161 ± 15.3152.9 ± 24.20.666
MRI LV volume (ml/m2)70.0 ± 24.272.3 ± 37.10.825
RV ejection fraction (%)32.0 (28.0–53.0)41.0 (37.5–44.5)0.552
LV ejection fraction (%)51.0 (46.0–53.0)58.0 (56.5–59.5)0.666
Catheterizations performed3 (50.0)7 (58.3%)1.000
RV end-diastolic pressure (mm Hg)10.7 ± 3.513.1 ± 3.90.377
LV end-diastolic pressure (mm Hg)9.0 ± 1.611.0 ± 2.10.246
Gadolinium enhancement (+)2 (50.0%)4 (100.0%)0.429

Values are median (interquartile range), n (%), or mean ± SD.

VT = ventricular tachycardia; other abbreviations as in Tables 1 and 3.