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Electrocardiology
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Basics of ECG Interpretation11 Topics
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Normal ECG Parameters
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ECG Interpretation of Chamber Enlargement4 Topics
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Dysrhythmias
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Bradycardia
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Heart Block3 Topics
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Sick Sinus Syndrome
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Tachycardia8 Topics
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Hyperkalemia
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Myocardial Hypoxia/Ischemia
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Low Amplitude QRS Complex
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Wide QRS Complex
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Bundle Branch Block
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Differentials for ECG Abnormalities
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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)