cardiac conduction system sinoatrial (sa) node atrioventricular (av) node
TRANSCRIPT
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THE CARDIAC CYCLE
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Cardiac Conduction System
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Sinoatrial (SA) node
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Atrioventricular (AV) node
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Antrioventricular (AV) Bundle (Bundle of His)
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Right bundle branch
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Left bundle branch
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Purkinje Fibers
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EKG = ECG = electrocardiogram
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Leads (limb leads)
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P wave
Atrial Depolarization
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QRS complex
Ventricular Depolarization
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T wave
Ventricular Repolarization
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Depolarization
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Repolarization
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Bradycardia
Resting heart rate under 60 bpm
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Tachycardia
Heart rate exceeds 100 bpm
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Fibrillation
Rapid, irregular, and unsynchronized contraction of muscle fibers