Table 3.
Cardiac Evaluation of the Non‐MD Myopathy Patient Cohort
| Modality | Non‐MD Myopathies |
|---|---|
| 12‐Lead ECG (n=40) | |
| Heart rate, beats per min | 72 (62–83.5) |
| PR interval, ms | 152 (140–172) |
| QRS duration, ms | 90 (82–98) |
| QTc interval, ms | 396 (382–416) |
| First‐degree AVB | 2 (5) |
| LAFB | 2 (5) |
| LBBB | 1 (2.5) |
| RBBB | 2 (5) |
| Echocardiogram (n=33) | |
| LVIDd, cm | 4.5 (4.1–5) |
| LVIDs, cm | 2.8 (2.6–3.3) |
| LVPWd, cm | 0.8 (0.7–1) |
| LVEF, % | 60 (55–60) |
| LVMI, g/m2 | 51.8 (43.9–54) |
| Cardiac MRI (n=16) | |
| LA volume index, mL/m2 | 36.8 (24–40.9) |
| LVEDVi, mL/m2 | 71 (62.5–78.5) |
| LVESVi, mL/m2 | 27 (21.5–31) |
| LVEF, % | 62 (57–66) |
| LVMI, g/m2 | 43 (32.5–52) |
| RVEDVi, mL/m2 | 74 (65–80) |
| RVESVi, mL/m2 | 31 (26–37) |
| RVEF, % | 57 (53–59.5) |
Values are expressed as median (interquartile range) or number (percentage). AVB indicates atrioventricular block; LA, left atrial; LAFB, left anterior fascicular block; LBBB, left bundle branch block; LVEF, left ventricular ejection fraction; LVEDVi, left ventricular end‐diastolic volume index; LVESVi, left ventricular end‐systolic volume index; LVIDd, left ventricular internal dimension at end‐diastole; LVIDs, left ventricular internal dimension at end‐systole; LVMI, left ventricular mass index; LVPWd, left ventricular posterior wall thickness at end‐diastole; MD, muscular dystrophy; MRI, magnetic resonance imaging; PR interval, duration of atrial depolarization; QRS duration, duration of ventricular depolarization; QTc interval, corrected duration between ventricular depolarization and repolarization; RBBB, right bundle branch block; RVEDVi, right ventricular end‐diastolic volume index; RVEF, right ventricular ejection fraction; RVESVi, right ventricular end‐systolic volume index.