Electrocardiographic signs | Workforce | Percentage |
Sinus tachycardia | 21 | 65.6 |
Left atrial hypertrophy | 9 | 28.1 |
Left ventricular hypertrophy | 6 | 18.8 |
Atrial flutter | 1 | 3.1 |
Atrial fibrillation | 1 | 3.1 |
Left bundle branch bloc | 1 | 3.1 |
Others | 8 | 25 |