Table 1. Baseline and follow-up information
Control (n=451) ICE (n=155)
Baseline data
Age, mean (SD), years 46.2 (16.1) 46.7 (15.2)
Male, n(%) 179 (39.7) 76 (49.0)*
Type of arrhythmia
PVC, n(%) 389 (86.3) 134 (86.5)
VT, n(%) 47 (10.4) 13 (8.4)
PVC and VT, n(%) 15 (3.3) 8 (5.2)
Burden of PVC
<20%, n(%) 163 (40.3) 55 (38.7)
20-30%, n(%) 136 (33.7) 48 (33.8)
>30%, n(%) 105 (26.0) 39 (27.5)
Symptoms
Palpitation, n(%) 344 (76.3) 118 (76.1)
Chest distress, n(%) 255 (56.5) 80 (51.6)
Chess pain, n(%) 93 (20.6) 35 (22.6)
Duration since dignosis (SD), months 37.7 (56.9) 38.3 (58.4)
Coronary heart disease, n(%) 75 (16.6) 25 (16.1)
Hypertension, n(%) 117 (25.9) 44 (28.4)
Diabetes mellitus, n(%) 37 (8.2) 15 (3.3)
Prior stroke/TIA/systemic embolism, n(%) 25 (5.5) 6 (3.9)
Abnormal left ventricular ejection fraction, n(%) 45 (10.0) 22 (14.2)
Abnormal left ventricular diastolic diameter, n(%) 67 (14.9) 27 (17.4)
Smoking, n(%) 76 (16.9) 30 (19.4)
Alcohol consumption, n(%) 67 (14.9) 38 (24.5)
Body mass index≥28.0, n(%) 87 (19.3) 35 (22.6)
Abnormal troponin I, n(%) 58 (12.9) 25 (16.1)
Abnormal potassium, n(%) 25 (5.5) 1 (0.6)*
Antiarrhythmic drugs
Class Ic, n(%) 8 (1.8) 7 (4.6)
Class IIa, n(%) 131 (29.0) 51 (33.8)
Class IIIa, n(%) 10 (2.2) 3 (1.9)
Others, n(%) 54 (12.0) 22 (14.6)
Follow-up data
Follow-up duration, mean (SD), months 24.4 (10.4) 11.3 (6.6)*
24 hour-holter monitoring 390 (86.5) 136 (87.7)
Improvement of left venricular ejction fraction, mean (SD), % 8.21 (6.98) 6.56 (4.16)*
Reduction of left ventricular diastolic diameter, mean (SD), % 4.00 (3.51) 3.80 (2.59)
Cardiovascular rehospitalization, n(%) 26 (5.8) 3 (1.9)
Antiarrhythmic drugs*
Class Ic, n(%) 9 (2.0) 8 (5.2)
Class IIa, n(%) 51 (11.3) 26 (16.8)
Class IIIa, n(%) 10 (2.2) 3 (1.9)
Others, n(%) 20 (4.4) 17 (11.3)
Abbreviations: ICE: intracardiac echocardiography; PVC: premature ventricular complexes; VT: ventricular tachycardia. Abbreviations: ICE: intracardiac echocardiography; PVC: premature ventricular complexes; VT: ventricular tachycardia. Abbreviations: ICE: intracardiac echocardiography; PVC: premature ventricular complexes; VT: ventricular tachycardia.
P<0.05, compared with control group * P<0.05, compared with control group * P<0.05, compared with control group