Table 3. Electrocardiographic findings according to the severity of left ventricular systolic dysfunction.
| Values of left ventricular ejection fraction* | ECG data | Number (%) |
|---|---|---|
| Left ventricular ejection fraction <50% and ≥40% (n = 56) | Overall RBBB | 19 (34) |
| Isolated RBBB | 8 (14) | |
| RBBB plus LAFB | 11 (20) | |
| Normal ECG | 4 (7) | |
| Left ventricular ejection fraction <40% and ≥30% (n = 30) | Overall RBBB | 12 (40) |
| Isolated RBBB | 6 (20) | |
| RBBB plus LAFB | 6 (20) | |
| Normal ECG | 0 | |
| Left ventricular ejection fraction <30% (n = 17) | Overall RBBB | 2 (12) |
| Isolated RBBB | 1 (6) | |
| RBBB plus LAFB | 1 (6) | |
| Normal ECG | 0 |
Left ventricular ejection fraction <50% was found in 103 patients (14%) and ≥50% in the remaining patients.
LVEF = left ventricular ejection fraction.