Tachycardia Diagnoses

Question 1

DDx for ECG with regular rate and rhythm with Narrow QRS

Answer 1

1. Sinus tachycardia
2. Atrial flutter
3. SVT (AVNRT/AVRT/AT)
4. Junctional Tachycardia

Question 2

DDx for ECG with IRREGULAR rate and rhythm with Narrow QRS

Answer 2

1. Atrial Fibrillation
2. Atrial flutter with variable block
3. Multifocal atrial tachycardia

Question 3

DDx for ECG with regular rate and rhythm with WIDE QRS

Answer 3

1. Ventricular tachycardia
2. SVT with aberrancy
3. SVT with pre-excitation
4. Hyperkalemia

Question 4

DDx for ECG with IRREGULAR rate and rhythm with WIDE QRS

Answer 4

1. Ventricular Fibrillation
2. Polymorphic VT (E.g. Torsade)
3. AF with aberrancy
4. AF with pre-excitation