Table 4.
Relationship Between Presence and Extent of Right Precordial TWI and CMR Parameters
| Parameters | No TWI in Right Precordial Leads (n=18) | TWI in Right Precordial Leads Only (n=11) | TWI in Right Precordial+Left Precordial and/or Inferior Leads (n=50) | P Value |
|---|---|---|---|---|
| RV EDV, mL/m2 | 92 (75–103) | 94 (90–115) | 117 (104–130) | <0.001 |
| RV EF, % | 57 (54–63) | 49 (38–60) | 41 (34–49) | <0.001 |
| RV WMA, no. of segments | 1 (0–2) | 2 (1–3) | 3 (2–4) | <0.001 |
| RV dilatationa | 6 (33) | 9 (82) | 46 (92) | <0.001 |
| RV dysfunction (RV EF <45%) | 1 (6) | 4 (36) | 32 (64) | <0.001 |
| Displacement angle (α), ° | 40 (39–42) | 36 (32–39) | 52 (44–60) | 0.02 |
| Displacement ratio %LatD, % | 60 (56–63) | 52 (41–53) | 97 (57–100) | <0.001 |
| LV EDV, mL/m2 | 92 (77–96) | 89 (75–100) | 82 (71–91) | 0.192 |
| LV EF, % | 57 (49–64) | 59 (52–63) | 58 (48–62) | 0.787 |
| LV dilatation (≥90 mL/m2) | 11 (61) | 5 (46) | 17 (34) | 0.131 |
| LV dysfunction (≤50%) | 7 (39) | 1 (9) | 14 (28) | 0.221 |
| RV LGE | 9 (50) | 5 (46) | 41 (82) | 0.007 |
| LV LGE | 13 (72) | 7 (64) | 37 (74) | 0.786 |
Values are expressed as number (percentage) of patients or median (25th–75th percentile). α indicates cardiac apex angle; CMR, cardiac magnetic resonance; EDV, end‐diastolic volume; EF, ejection fraction; %LatD, ratio of lateral displacement; LGE, late gadolinium enhancement; LV, left ventricular; RV, right ventricular; TWI, T‐wave inversion; WMA, wall motion abnormality.
a
According to International Task Force criteria, cutoff values were >100 mL/m2 (men) and >90 mL/m2 (women).