Patient characteristics, electrocardiogram findings, and results of single-beat analysis of intracardiac electrograms
| Patient no/ age/sex . | Non-sustained VT/sustained VT . | VT cycle length . | Fusion . | Location . | %VPB/24 h . | Mean cycle length (range) . | QRS − LVP (ms) . | LVP vpb − V vpb or LVP vpb − QRS . | LVP amplitude (mV) . | LVP duration (ms) . | LVP vpb amplitude (mV) . | LVP vpb duration (ms) . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/58/f | 6/− | 353 | − | RVOT | 10.7 | 386 (300–500) | 25 | 29 | 3.2 | 24 | 2.7 | 27 |
| 2/52/f | 37/− | 360 | + | RVOT | 11.9 | 370 (295–480) | 70 | 10 | 3.2 | 46 | 3.3 | 50 |
| 3/49/m | 7/+ | 400 | + | RVOT | 1.1 | 413 (320–500) | 45 | 27 | 1.2 | 45 | 1.3 | 45 |
| 4/58/f | −/− | − | − | RVOT | NA | 520 (520–900) | NA | NA | NA | NA | NA | NA |
| 5/54/m | −/− | − | − | RVOT | 1.8 | 540 (540–550) | 85 | 52 | 0.3 | 45 | 0.7 | 45 |
| 6/63/f | −/− | − | + | RVOT | 10 | 429 (380–510) | 40 | 21 | 0.9 | 37 | 1.8 | 20 |
| 7/58/f | 3/− | 533 | + | RVOT | 30.4 | 587 (430–700) | 75 | 42 | 1.0 | 56 | 2.4 | 56 |
| 8/33f | 4/− | 400 | + | RVOT | 10.5 | 413 (375–515) | 50 | 40 | 1.8 | 25 | 1.2 | 30 |
| 9/29/f | −/− | − | − | RVOT | 5.4 | 353 (330–375) | 50 | 35 | 0.2 | 27 | 1.2 | 33 |
| 10/58/f | 4/+ | 400 | − | RVOT | 10.3 | NA | 25 | 41 | 0.6 | 25 | 0.8 | 23 |
| 11/40/m | 5/− | 440 | − | RVOT | 11.1 | 475 (420–525) | 36 | 40 | 3.9 | 40 | 2.5 | 35 |
| 12/35/f | 10/+ | 320 | + | LCC | NA | 440 (360–580) | 15 | 20 | 2.5 | 55 | 1.4 | 57 |
| 13/28f | 7/− | 260 | + | RVOT | 1.5 | 450 (430–485) | 36 | 28 | 3.1 | 30 | 1.6 | 70 |
| 14/78/m | 4/− | 300 | − | RVOT | 0.4 | 580 (410–615) | 52 | 45 | 2.0 | 32 | 1.0 | 50 |
| 15/56/f | 3/− | 255 | − | LCC | 4.2 | 500 (430–630) | 60 | 40 | 0.6 | 50 | 0.5 | 45 |
| 16/42/m | 6/− | 240 | − | RVOT | 0.4 | 460 (440–510) | 30 | 30 | 1.8 | 22 | 6.0 | 36 |
| 17/37/f | −/− | − | − | RVOT | 1.5 | 420 (400–440) | 21 | 25 | 6.2 | 31 | 1.4 | 24 |
| 18/34/f | 11/− | 320 | + | RVOT | 5.0 | 440 (420–450) | 28 | 24 | 2.8 | 23 | 7.8 | 25 |
| 19/48/f | 7/− | 280 | − | RVOT | NA | 370 (340–380) | 35 | 36 | 1.0 | 44 | 0.7 | 38 |
| 20/42/m | 3/− | 380 | − | RVOT | 10.9 | 420 (340–440) | 32 | 60 | 1.3 | 22 | 2.5 | 51 |
| 21/28/f | 3/+ | 250 | + | RVOT | 1.6 | 490 (480–500) | 25 | 29 | 0.4 | 40 | 1.6 | 28 |
| 22/58/m | 22/− | 245 | + | RVOT | 7.4 | 370 (340–400) | 40 | 26 | 2.4 | 36 | 1.9 | 30 |
| 23/42/f | −/− | − | − | RVOT | 1.5 | 420 (415–460) | 52 | 38 | 4.5 | 45 | 1.4 | 35 |
| 24/40/m | −/− | − | − | RVOT | 13.0 | 520 (480–720) | 10 | 25 | 0.6 | 44 | 0.5 | 45 |
| 25/37/f | −/− | − | − | RVOT | 10.0 | 590 (565–590) | 47 | 35 | 3.0 | 34 | 3.6 | 47 |
| Mean ± SD | 337 ± 88 | 9.5 ± 8.1 | 41 ± 19 | 33 ± 12 | 2.0 ± 1.5 | 37 ± 11 | 2.1 ± 1.7 | 39 ± 13 |
| Patient no/ age/sex . | Non-sustained VT/sustained VT . | VT cycle length . | Fusion . | Location . | %VPB/24 h . | Mean cycle length (range) . | QRS − LVP (ms) . | LVP vpb − V vpb or LVP vpb − QRS . | LVP amplitude (mV) . | LVP duration (ms) . | LVP vpb amplitude (mV) . | LVP vpb duration (ms) . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/58/f | 6/− | 353 | − | RVOT | 10.7 | 386 (300–500) | 25 | 29 | 3.2 | 24 | 2.7 | 27 |
| 2/52/f | 37/− | 360 | + | RVOT | 11.9 | 370 (295–480) | 70 | 10 | 3.2 | 46 | 3.3 | 50 |
| 3/49/m | 7/+ | 400 | + | RVOT | 1.1 | 413 (320–500) | 45 | 27 | 1.2 | 45 | 1.3 | 45 |
| 4/58/f | −/− | − | − | RVOT | NA | 520 (520–900) | NA | NA | NA | NA | NA | NA |
| 5/54/m | −/− | − | − | RVOT | 1.8 | 540 (540–550) | 85 | 52 | 0.3 | 45 | 0.7 | 45 |
| 6/63/f | −/− | − | + | RVOT | 10 | 429 (380–510) | 40 | 21 | 0.9 | 37 | 1.8 | 20 |
| 7/58/f | 3/− | 533 | + | RVOT | 30.4 | 587 (430–700) | 75 | 42 | 1.0 | 56 | 2.4 | 56 |
| 8/33f | 4/− | 400 | + | RVOT | 10.5 | 413 (375–515) | 50 | 40 | 1.8 | 25 | 1.2 | 30 |
| 9/29/f | −/− | − | − | RVOT | 5.4 | 353 (330–375) | 50 | 35 | 0.2 | 27 | 1.2 | 33 |
| 10/58/f | 4/+ | 400 | − | RVOT | 10.3 | NA | 25 | 41 | 0.6 | 25 | 0.8 | 23 |
| 11/40/m | 5/− | 440 | − | RVOT | 11.1 | 475 (420–525) | 36 | 40 | 3.9 | 40 | 2.5 | 35 |
| 12/35/f | 10/+ | 320 | + | LCC | NA | 440 (360–580) | 15 | 20 | 2.5 | 55 | 1.4 | 57 |
| 13/28f | 7/− | 260 | + | RVOT | 1.5 | 450 (430–485) | 36 | 28 | 3.1 | 30 | 1.6 | 70 |
| 14/78/m | 4/− | 300 | − | RVOT | 0.4 | 580 (410–615) | 52 | 45 | 2.0 | 32 | 1.0 | 50 |
| 15/56/f | 3/− | 255 | − | LCC | 4.2 | 500 (430–630) | 60 | 40 | 0.6 | 50 | 0.5 | 45 |
| 16/42/m | 6/− | 240 | − | RVOT | 0.4 | 460 (440–510) | 30 | 30 | 1.8 | 22 | 6.0 | 36 |
| 17/37/f | −/− | − | − | RVOT | 1.5 | 420 (400–440) | 21 | 25 | 6.2 | 31 | 1.4 | 24 |
| 18/34/f | 11/− | 320 | + | RVOT | 5.0 | 440 (420–450) | 28 | 24 | 2.8 | 23 | 7.8 | 25 |
| 19/48/f | 7/− | 280 | − | RVOT | NA | 370 (340–380) | 35 | 36 | 1.0 | 44 | 0.7 | 38 |
| 20/42/m | 3/− | 380 | − | RVOT | 10.9 | 420 (340–440) | 32 | 60 | 1.3 | 22 | 2.5 | 51 |
| 21/28/f | 3/+ | 250 | + | RVOT | 1.6 | 490 (480–500) | 25 | 29 | 0.4 | 40 | 1.6 | 28 |
| 22/58/m | 22/− | 245 | + | RVOT | 7.4 | 370 (340–400) | 40 | 26 | 2.4 | 36 | 1.9 | 30 |
| 23/42/f | −/− | − | − | RVOT | 1.5 | 420 (415–460) | 52 | 38 | 4.5 | 45 | 1.4 | 35 |
| 24/40/m | −/− | − | − | RVOT | 13.0 | 520 (480–720) | 10 | 25 | 0.6 | 44 | 0.5 | 45 |
| 25/37/f | −/− | − | − | RVOT | 10.0 | 590 (565–590) | 47 | 35 | 3.0 | 34 | 3.6 | 47 |
| Mean ± SD | 337 ± 88 | 9.5 ± 8.1 | 41 ± 19 | 33 ± 12 | 2.0 ± 1.5 | 37 ± 11 | 2.1 ± 1.7 | 39 ± 13 |
VPB, ventricular premature beat; VT, ventricular tachycardia; RVOT, right ventricular outflow tract; LCC, left coronary cusp; VT CL , cycle length of ventricular tachycardia; CI, coupling interval; LVP, the fragmented local potential of a sinus beat; QRS − LVP, the interval between the start of the QRS complex and the LVP; LVP vpb , the fragmented local potential of a VPB/VT; LVP/mV and LVP vpb /mV, the peak amplitude (mV) of LVP and the LVP vpb measured in the distal bipolar electrogram; LVPdur, duration of the LVP (ms) measured in the distal bipolar electrogram; LVP vpb − V, the interval between the LVP vpb and the onset of the V potential (or QRS complex); NA, non-applicable. Differences between tested variables: LVP vs. LVP vpb : P = 0.88; LVP vs. LVP vpb-dur : P = 0.60. There were no statistically significant differences between values for QRS − LVP, LVP, LVP dur , LVP vpb , LVP vpb-dur , and P vpb − QRS between patients with VPB vs. patients with VPB + VT.
Patient characteristics, electrocardiogram findings, and results of single-beat analysis of intracardiac electrograms
| Patient no/ age/sex . | Non-sustained VT/sustained VT . | VT cycle length . | Fusion . | Location . | %VPB/24 h . | Mean cycle length (range) . | QRS − LVP (ms) . | LVP vpb − V vpb or LVP vpb − QRS . | LVP amplitude (mV) . | LVP duration (ms) . | LVP vpb amplitude (mV) . | LVP vpb duration (ms) . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/58/f | 6/− | 353 | − | RVOT | 10.7 | 386 (300–500) | 25 | 29 | 3.2 | 24 | 2.7 | 27 |
| 2/52/f | 37/− | 360 | + | RVOT | 11.9 | 370 (295–480) | 70 | 10 | 3.2 | 46 | 3.3 | 50 |
| 3/49/m | 7/+ | 400 | + | RVOT | 1.1 | 413 (320–500) | 45 | 27 | 1.2 | 45 | 1.3 | 45 |
| 4/58/f | −/− | − | − | RVOT | NA | 520 (520–900) | NA | NA | NA | NA | NA | NA |
| 5/54/m | −/− | − | − | RVOT | 1.8 | 540 (540–550) | 85 | 52 | 0.3 | 45 | 0.7 | 45 |
| 6/63/f | −/− | − | + | RVOT | 10 | 429 (380–510) | 40 | 21 | 0.9 | 37 | 1.8 | 20 |
| 7/58/f | 3/− | 533 | + | RVOT | 30.4 | 587 (430–700) | 75 | 42 | 1.0 | 56 | 2.4 | 56 |
| 8/33f | 4/− | 400 | + | RVOT | 10.5 | 413 (375–515) | 50 | 40 | 1.8 | 25 | 1.2 | 30 |
| 9/29/f | −/− | − | − | RVOT | 5.4 | 353 (330–375) | 50 | 35 | 0.2 | 27 | 1.2 | 33 |
| 10/58/f | 4/+ | 400 | − | RVOT | 10.3 | NA | 25 | 41 | 0.6 | 25 | 0.8 | 23 |
| 11/40/m | 5/− | 440 | − | RVOT | 11.1 | 475 (420–525) | 36 | 40 | 3.9 | 40 | 2.5 | 35 |
| 12/35/f | 10/+ | 320 | + | LCC | NA | 440 (360–580) | 15 | 20 | 2.5 | 55 | 1.4 | 57 |
| 13/28f | 7/− | 260 | + | RVOT | 1.5 | 450 (430–485) | 36 | 28 | 3.1 | 30 | 1.6 | 70 |
| 14/78/m | 4/− | 300 | − | RVOT | 0.4 | 580 (410–615) | 52 | 45 | 2.0 | 32 | 1.0 | 50 |
| 15/56/f | 3/− | 255 | − | LCC | 4.2 | 500 (430–630) | 60 | 40 | 0.6 | 50 | 0.5 | 45 |
| 16/42/m | 6/− | 240 | − | RVOT | 0.4 | 460 (440–510) | 30 | 30 | 1.8 | 22 | 6.0 | 36 |
| 17/37/f | −/− | − | − | RVOT | 1.5 | 420 (400–440) | 21 | 25 | 6.2 | 31 | 1.4 | 24 |
| 18/34/f | 11/− | 320 | + | RVOT | 5.0 | 440 (420–450) | 28 | 24 | 2.8 | 23 | 7.8 | 25 |
| 19/48/f | 7/− | 280 | − | RVOT | NA | 370 (340–380) | 35 | 36 | 1.0 | 44 | 0.7 | 38 |
| 20/42/m | 3/− | 380 | − | RVOT | 10.9 | 420 (340–440) | 32 | 60 | 1.3 | 22 | 2.5 | 51 |
| 21/28/f | 3/+ | 250 | + | RVOT | 1.6 | 490 (480–500) | 25 | 29 | 0.4 | 40 | 1.6 | 28 |
| 22/58/m | 22/− | 245 | + | RVOT | 7.4 | 370 (340–400) | 40 | 26 | 2.4 | 36 | 1.9 | 30 |
| 23/42/f | −/− | − | − | RVOT | 1.5 | 420 (415–460) | 52 | 38 | 4.5 | 45 | 1.4 | 35 |
| 24/40/m | −/− | − | − | RVOT | 13.0 | 520 (480–720) | 10 | 25 | 0.6 | 44 | 0.5 | 45 |
| 25/37/f | −/− | − | − | RVOT | 10.0 | 590 (565–590) | 47 | 35 | 3.0 | 34 | 3.6 | 47 |
| Mean ± SD | 337 ± 88 | 9.5 ± 8.1 | 41 ± 19 | 33 ± 12 | 2.0 ± 1.5 | 37 ± 11 | 2.1 ± 1.7 | 39 ± 13 |
| Patient no/ age/sex . | Non-sustained VT/sustained VT . | VT cycle length . | Fusion . | Location . | %VPB/24 h . | Mean cycle length (range) . | QRS − LVP (ms) . | LVP vpb − V vpb or LVP vpb − QRS . | LVP amplitude (mV) . | LVP duration (ms) . | LVP vpb amplitude (mV) . | LVP vpb duration (ms) . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/58/f | 6/− | 353 | − | RVOT | 10.7 | 386 (300–500) | 25 | 29 | 3.2 | 24 | 2.7 | 27 |
| 2/52/f | 37/− | 360 | + | RVOT | 11.9 | 370 (295–480) | 70 | 10 | 3.2 | 46 | 3.3 | 50 |
| 3/49/m | 7/+ | 400 | + | RVOT | 1.1 | 413 (320–500) | 45 | 27 | 1.2 | 45 | 1.3 | 45 |
| 4/58/f | −/− | − | − | RVOT | NA | 520 (520–900) | NA | NA | NA | NA | NA | NA |
| 5/54/m | −/− | − | − | RVOT | 1.8 | 540 (540–550) | 85 | 52 | 0.3 | 45 | 0.7 | 45 |
| 6/63/f | −/− | − | + | RVOT | 10 | 429 (380–510) | 40 | 21 | 0.9 | 37 | 1.8 | 20 |
| 7/58/f | 3/− | 533 | + | RVOT | 30.4 | 587 (430–700) | 75 | 42 | 1.0 | 56 | 2.4 | 56 |
| 8/33f | 4/− | 400 | + | RVOT | 10.5 | 413 (375–515) | 50 | 40 | 1.8 | 25 | 1.2 | 30 |
| 9/29/f | −/− | − | − | RVOT | 5.4 | 353 (330–375) | 50 | 35 | 0.2 | 27 | 1.2 | 33 |
| 10/58/f | 4/+ | 400 | − | RVOT | 10.3 | NA | 25 | 41 | 0.6 | 25 | 0.8 | 23 |
| 11/40/m | 5/− | 440 | − | RVOT | 11.1 | 475 (420–525) | 36 | 40 | 3.9 | 40 | 2.5 | 35 |
| 12/35/f | 10/+ | 320 | + | LCC | NA | 440 (360–580) | 15 | 20 | 2.5 | 55 | 1.4 | 57 |
| 13/28f | 7/− | 260 | + | RVOT | 1.5 | 450 (430–485) | 36 | 28 | 3.1 | 30 | 1.6 | 70 |
| 14/78/m | 4/− | 300 | − | RVOT | 0.4 | 580 (410–615) | 52 | 45 | 2.0 | 32 | 1.0 | 50 |
| 15/56/f | 3/− | 255 | − | LCC | 4.2 | 500 (430–630) | 60 | 40 | 0.6 | 50 | 0.5 | 45 |
| 16/42/m | 6/− | 240 | − | RVOT | 0.4 | 460 (440–510) | 30 | 30 | 1.8 | 22 | 6.0 | 36 |
| 17/37/f | −/− | − | − | RVOT | 1.5 | 420 (400–440) | 21 | 25 | 6.2 | 31 | 1.4 | 24 |
| 18/34/f | 11/− | 320 | + | RVOT | 5.0 | 440 (420–450) | 28 | 24 | 2.8 | 23 | 7.8 | 25 |
| 19/48/f | 7/− | 280 | − | RVOT | NA | 370 (340–380) | 35 | 36 | 1.0 | 44 | 0.7 | 38 |
| 20/42/m | 3/− | 380 | − | RVOT | 10.9 | 420 (340–440) | 32 | 60 | 1.3 | 22 | 2.5 | 51 |
| 21/28/f | 3/+ | 250 | + | RVOT | 1.6 | 490 (480–500) | 25 | 29 | 0.4 | 40 | 1.6 | 28 |
| 22/58/m | 22/− | 245 | + | RVOT | 7.4 | 370 (340–400) | 40 | 26 | 2.4 | 36 | 1.9 | 30 |
| 23/42/f | −/− | − | − | RVOT | 1.5 | 420 (415–460) | 52 | 38 | 4.5 | 45 | 1.4 | 35 |
| 24/40/m | −/− | − | − | RVOT | 13.0 | 520 (480–720) | 10 | 25 | 0.6 | 44 | 0.5 | 45 |
| 25/37/f | −/− | − | − | RVOT | 10.0 | 590 (565–590) | 47 | 35 | 3.0 | 34 | 3.6 | 47 |
| Mean ± SD | 337 ± 88 | 9.5 ± 8.1 | 41 ± 19 | 33 ± 12 | 2.0 ± 1.5 | 37 ± 11 | 2.1 ± 1.7 | 39 ± 13 |
VPB, ventricular premature beat; VT, ventricular tachycardia; RVOT, right ventricular outflow tract; LCC, left coronary cusp; VT CL , cycle length of ventricular tachycardia; CI, coupling interval; LVP, the fragmented local potential of a sinus beat; QRS − LVP, the interval between the start of the QRS complex and the LVP; LVP vpb , the fragmented local potential of a VPB/VT; LVP/mV and LVP vpb /mV, the peak amplitude (mV) of LVP and the LVP vpb measured in the distal bipolar electrogram; LVPdur, duration of the LVP (ms) measured in the distal bipolar electrogram; LVP vpb − V, the interval between the LVP vpb and the onset of the V potential (or QRS complex); NA, non-applicable. Differences between tested variables: LVP vs. LVP vpb : P = 0.88; LVP vs. LVP vpb-dur : P = 0.60. There were no statistically significant differences between values for QRS − LVP, LVP, LVP dur , LVP vpb , LVP vpb-dur , and P vpb − QRS between patients with VPB vs. patients with VPB + VT.
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