Page 170 - ECG dr shamol_Slide

Low voltage QRS (less than 5 mm in Wide QRS:

leads I, II, III and <10 mm in chest 1. LBBB and RBBB

leads): 2. Ventricular ectopic

1. Improper standardization 3. Ventricular tachycardia

2. Obesity or thick chest wall 4. Idioventricular rhythm

3. Pericardial effusion 5. WPW syndrome

4. Emphysema 6. Hyperkalemia

5. Chronic constrictive pericarditis

6. Hypothyroidism

7. Hypothermia

Change in shape of QRS: Variable QRS:

1. RBBB 1. Torsades de pointes

2. LBBB 2. Multifocal ventricular ectopics

3. Ventricular tachycardia 3. Ventricular firillation

4. Ventricular fibrillation

5. WPW syndrome