Table 1.
Baseline characteristics.
| N = 15 | |
|---|---|
| Demographics | |
| Age (years)* | 19 (14, 44) |
| Sex (male) | 14 (93) |
| Symptoms | |
| Chest pain | 5 (33) |
| Shortness of breath | 8 (53) |
| Syncope | 6 (47) |
| Duration from symptom onset (years)* | 1 (1, 9) |
| Follow-up | |
| ICD | 1 (7) |
| RFA | 3 (20) |
| Death | 6 (40) |
| ECG | |
| f-QRS counts | |
| Base on patients | 15 (100) |
| Base on leads* | 7 (2, 12) |
| f-QRS score* | 9 (2, 33) |
| PR interval (ms)* | 97 (80, 162) |
| QRS duration (ms)* | 150 (100, 240) |
| QTc interval (ms)* | 470 (341, 615) |
| Atrial fibrillation | 3 (20) |
| Preexcitation | 13 (87) |
| Conduction block | 3 (20) |
| Imaging | |
| LV EF (%)* | 32 (8, 74) |
| LV EDVi (ml/m2)* | 149 (92, 321) |
| LV ESVi (ml/m2)* | 102 (32, 261) |
| LV MWT (mm)* | 21 (11, 33) |
| LV Mi (g/m2)* | 256 (88, 477) |
| HCM phenotype | 14 (93) |
| DCM phenotype | 1 (7) |
| LV LGE mass (g)* | 96 (8.5, 390) |
| LV LGE (%)* | 35 (4, 60) |
| LGE location | |
| LV free wall | 15 (100) |
| LV septum | 10 (67) |
*
Data are medians, and data in parentheses are ranges. Unless otherwise indicated, data are numbers of patients, and data in parentheses are percentages. f-QRS, fragmented QRS; ICD, implantable cardioverter defibrillator; RFA, radiofrequency ablation; LV, left ventricle; EF, ejection fraction; EDVi, end-diastolic volume index; MWT, maximum wall thickness; Mi, mass index; HCM, hypertrophic cardiomyopathy; DCM, dilated cardiomyopathy; LGE, late gadolinium enhancement.