Table 1.
Patients’ baseline characteristics
| Total (14) | SC-AI (9) | No SC-AI (5) | P-value | |
|---|---|---|---|---|
| Age (y) | 47 (30–51) | 46 (31–51) | 48 (22.5–55.5) | 1 |
| Male | 8 (57.1) | 5 (55.5) | 3 (60) | 0.82 |
| Prior shunt | 2 (14.3) | 1 (11) | 1 (20) | 0.6 |
| Age of repair (y) | 4 (2.3–6.2) | 4 (2.25–6.5) | 4(2–8) | 1 |
| Year of complete repair | 1977 (1975–95) | 1978 (1975–96) | 1978 (1973–2002) | 1 |
| Transannular patch | 8 (57.1) | 5 (55.5) | 3 (60) | 0.87 |
| Pulmonary valve replacement | 1 (7) | 1 (11) | 0 (0) | NA |
| Total surgeries | 1 (1–2) | 1 (1–2) | 1 (1–1.5) | 1 |
| Sinus rhythm | 14 (100) | 9 (100) | 5 (100) | 1 |
| QRS duration | 170 (160–192) | 174 (163–197) | 160 (120–180) | 0.26 |
| QRS > 180 ms | 5 (35.7) | 4 (44.4) | 1 (20) | 0.36 |
| RBBB | 13 (92.8) | 9 (100) | 4 (80) | 0.23 |
| RV function preserved | 10 (71.4) | 7 (77.7) | 3 (60) | 1 |
| RV EDV (mL/m2) | 166 (129–195) | 154 (129–183) | 193 (131–228) | 0.6 |
| LV function preserved | 11 (78.5) | 7 (77.7) | 4 (80) | 1 |
| LV EDV (mL/m2) | 72 (67–80) | 71 (67–80) | 75 (65–89) | 1 |
| Severe pulmonary insufficiency | 10 (71.4) | 6 (66.6) | 4 (80) | 0.25 |
| Atrial arrhythmias | 4 (28.5) | 3 (33.3) | 1 (20) | 0.59 |
| Study indication | ||||
| Spontaneous VT | 2 (14.3) | 2 (22) | 0 (0) | |
| Pre-PVR | 10 (71.4) | 6 (66.6) | 4 (80) | |
| Non-invasive intermediate risk | 2 (14.3) | 1 (11) | 1 (20) | |
| Inducibility | 7 (50) | 7 (77) | 0 (0) | 0.006 |
Values are median and p25–75 or n (%).
EDV, end-diastolic volume; LV, left ventricular; RV, right ventricular; RBBB, right bundle branch block; SC-AI, slow conduction anatomical isthmus; VT, ventricular tachycardia.