Table 5.
Relationship Between Low Voltages of QRS (<0.5 mV) in Limb Leads and CMR Parameters
| Parameters | Low QRS Voltages | P Value | |
|---|---|---|---|
| No (n=63) | Yes (n=16) | ||
| RV EDV, mL/m2 | 109 (94–118) | 105 (89–137) | 0.864 |
| RV EF, % | 49 (38–56) | 42 (30–60) | 0.320 |
| RV WMA, no. of segments | 2 (1–4) | 3 (2–4) | 0.349 |
| RV LGE | 43 (68) | 12 (75) | 0.764 |
| LV EDV, mL/m2 | 85 (74–96) | 86 (71–92) | 0.403 |
| LV EF, % | 59 (51–64) | 53 (46–59) | 0.087 |
| LV LGE | 41 (65) | 16 (100) | 0.004 |
| LV LGE, no. of segments | 3 (2–7) | 6 (5–9) | <0.001 |
Values are expressed as number (percentage) of patients or median (25th–75 percentile). CMR indicates cardiac magnetic resonance; EDV, end‐diastolic volume; EF, ejection fraction; LGE, late gadolinium enhancement; LV, left ventricular; RV, right ventricular; WMA, wall motion abnormality.