Table 2

Electrophysiology study by follow-up ventricular tachyarrhythmia

Follow-up ventricular tachyarrhythmia
Yes
N = 38
No
N = 84
Total
N = 122
P value
Coupling interval responsible for ventricular tachycardia induction0.0004
 Mean (SD)213.7 (±41.3)241.7 (±35.7)233.0 (±39.5)
 Median (IQR)210.0 (180.0–240.0)240.0 (217.5–280.0)230.0 (210.0–260.0)
Coupling interval group0.0003
 < 200 ms15 (39.5%)8 (9.5%)23 (18.9%)
 ≥ 200 to <250 ms16 (42.1%)39 (46.4%)55 (45.1%)
 ≥ 250 ms7 (18.4%)37 (44.0%)44 (36.1%)
Cycle length of induced ventricular tachycardia0.011
 Mean (SD)220.0 (±20.5)233.3 (±30.8)229.1 (±28.6)
 Median (IQR)214.0 (210.0–220.0)220.0 (210.0–246.2)220.0 (210.0–240.0)
Number of extrastimuli0.21
 Mean (SD)3.3 (±0.7)3.4 (±0.7)3.4 (±0.7)
 Median (IQR)3.0 (3.0–4.0)4.0 (3.0–4.0)3.0 (3.0–4.0)
Mode of termination of ventricular tachycardia0.26
 Spontaneous5 (13.2%)4 (4.8%)9 (7.4%)
 Anti-tachycardia/overdrive pacing14 (36.8%)37 (44.0%)51 (41.8%)
 Shock/countershock19 (50.0%)43 (51.2%)62 (50.8%)
Follow-up ventricular tachyarrhythmia
Yes
N = 38
No
N = 84
Total
N = 122
P value
Coupling interval responsible for ventricular tachycardia induction0.0004
 Mean (SD)213.7 (±41.3)241.7 (±35.7)233.0 (±39.5)
 Median (IQR)210.0 (180.0–240.0)240.0 (217.5–280.0)230.0 (210.0–260.0)
Coupling interval group0.0003
 < 200 ms15 (39.5%)8 (9.5%)23 (18.9%)
 ≥ 200 to <250 ms16 (42.1%)39 (46.4%)55 (45.1%)
 ≥ 250 ms7 (18.4%)37 (44.0%)44 (36.1%)
Cycle length of induced ventricular tachycardia0.011
 Mean (SD)220.0 (±20.5)233.3 (±30.8)229.1 (±28.6)
 Median (IQR)214.0 (210.0–220.0)220.0 (210.0–246.2)220.0 (210.0–240.0)
Number of extrastimuli0.21
 Mean (SD)3.3 (±0.7)3.4 (±0.7)3.4 (±0.7)
 Median (IQR)3.0 (3.0–4.0)4.0 (3.0–4.0)3.0 (3.0–4.0)
Mode of termination of ventricular tachycardia0.26
 Spontaneous5 (13.2%)4 (4.8%)9 (7.4%)
 Anti-tachycardia/overdrive pacing14 (36.8%)37 (44.0%)51 (41.8%)
 Shock/countershock19 (50.0%)43 (51.2%)62 (50.8%)

SD, standard deviation; IQR, interquartile range.

Table 2

Electrophysiology study by follow-up ventricular tachyarrhythmia

Follow-up ventricular tachyarrhythmia
Yes
N = 38
No
N = 84
Total
N = 122
P value
Coupling interval responsible for ventricular tachycardia induction0.0004
 Mean (SD)213.7 (±41.3)241.7 (±35.7)233.0 (±39.5)
 Median (IQR)210.0 (180.0–240.0)240.0 (217.5–280.0)230.0 (210.0–260.0)
Coupling interval group0.0003
 < 200 ms15 (39.5%)8 (9.5%)23 (18.9%)
 ≥ 200 to <250 ms16 (42.1%)39 (46.4%)55 (45.1%)
 ≥ 250 ms7 (18.4%)37 (44.0%)44 (36.1%)
Cycle length of induced ventricular tachycardia0.011
 Mean (SD)220.0 (±20.5)233.3 (±30.8)229.1 (±28.6)
 Median (IQR)214.0 (210.0–220.0)220.0 (210.0–246.2)220.0 (210.0–240.0)
Number of extrastimuli0.21
 Mean (SD)3.3 (±0.7)3.4 (±0.7)3.4 (±0.7)
 Median (IQR)3.0 (3.0–4.0)4.0 (3.0–4.0)3.0 (3.0–4.0)
Mode of termination of ventricular tachycardia0.26
 Spontaneous5 (13.2%)4 (4.8%)9 (7.4%)
 Anti-tachycardia/overdrive pacing14 (36.8%)37 (44.0%)51 (41.8%)
 Shock/countershock19 (50.0%)43 (51.2%)62 (50.8%)
Follow-up ventricular tachyarrhythmia
Yes
N = 38
No
N = 84
Total
N = 122
P value
Coupling interval responsible for ventricular tachycardia induction0.0004
 Mean (SD)213.7 (±41.3)241.7 (±35.7)233.0 (±39.5)
 Median (IQR)210.0 (180.0–240.0)240.0 (217.5–280.0)230.0 (210.0–260.0)
Coupling interval group0.0003
 < 200 ms15 (39.5%)8 (9.5%)23 (18.9%)
 ≥ 200 to <250 ms16 (42.1%)39 (46.4%)55 (45.1%)
 ≥ 250 ms7 (18.4%)37 (44.0%)44 (36.1%)
Cycle length of induced ventricular tachycardia0.011
 Mean (SD)220.0 (±20.5)233.3 (±30.8)229.1 (±28.6)
 Median (IQR)214.0 (210.0–220.0)220.0 (210.0–246.2)220.0 (210.0–240.0)
Number of extrastimuli0.21
 Mean (SD)3.3 (±0.7)3.4 (±0.7)3.4 (±0.7)
 Median (IQR)3.0 (3.0–4.0)4.0 (3.0–4.0)3.0 (3.0–4.0)
Mode of termination of ventricular tachycardia0.26
 Spontaneous5 (13.2%)4 (4.8%)9 (7.4%)
 Anti-tachycardia/overdrive pacing14 (36.8%)37 (44.0%)51 (41.8%)
 Shock/countershock19 (50.0%)43 (51.2%)62 (50.8%)

SD, standard deviation; IQR, interquartile range.

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