ECG differentials

Question 1

Right Axis Deviation Differentials (7)

Answer 1

1 - Pulmonary Embolism
2 - Hyperkalemia
3 - Sodium channel blocker toxicity (TCA overdose)
4 - RVH
5 - Can be normal in children or thin adults
6 - Pulmonary disease (ie. COPD)
7 - Lateral MI

Question 2

Irregular NCT Differentials (3)

Answer 2

1 - Afib w RVR
2 - Multifocal atrial tachycardia
3 - Atrial flutter with variable conduction

Question 3

Regular NCT Differentials (3)

Answer 3

1 - Sinus Tach
2 - SVT
3 - Atrial Flutter

Question 4

Regular WCT Differentials (4)

Answer 4

1 - Ventricular Tachycardia
2 - Sinus Tachy w/ Aberrant Conduction
3 - SVT w/ Aberrant Conduction
4 - Atrial Flutter w/ Aberrant Conduction

Question 5

Irregular WCT Differentials (5)

Answer 5

1 - Afib w/ Aberrant Conduction
2 - Atrial Flutter w/ Variable block and Aberrant Conduction
3 - Multifocal Atrial Tach w/ Aberrant Conduction
4 - Afib w/ WPW
5 - Polymorphic VTach (Torsades)

Question 6

Left Axis Deviation Differentials (7)

Answer 6

1 - L Anterior Fascicular Block
2 - LBBB
3 - Inferior MI
4 - LVH
5 - Ventricular ectopy
6 - Paced Beats
7 - WPW

Question 7

Causes of LVH (6)

Answer 7

1 - Hypertension *most common
2 - Aortic Stenosis
3 - Aortic Regurg
4 - Mitral Regurg
5 - Coarctation of Aorta
6 - Hypertrophic Cardiomyopathy

Question 8

Widespread ST depression with ST elevation in aVR is most indicative of what?

Answer 8

Widespread ischemia due to LMCA occlusion

Question 9

Widespread ST depression differentials (4)

Answer 9

1 - Infarction (Subendocardial - nSTEMI)
2 - Hypokalemia
3 - Digitalis (sagging STd)
4 - LVH