- Basics of ECG Interpretation11 Topics
- Normal ECG Parameters
- ECG Interpretation of Chamber Enlargement4 Topics
- Dysrhythmias
- Bradycardia
- Heart Block3 Topics
- Sick Sinus Syndrome
- Tachycardia8 Topics
- Hyperkalemia
- Myocardial Hypoxia/Ischemia
- Low Amplitude QRS Complex
- Wide QRS Complex
- Bundle Branch Block
- Differentials for ECG Abnormalities
Lesson 6, Topic 1
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Heart block refers to a group of disorders characterized by variable conduction from the atria to the ventricles.
Heart block can be classified as
- 1st degree heart block – prolonged conduction across the atrio-ventricular node
- 2nd degree heart block – failure of SA impulse to activate the ventricular myocardium
- 3rd degree heart block – no conduction through AV node, and ventricular activation is due to an automatic subsidiary pacemaker focus (escape focus)
