Normal Sinus Rhythm Originates in the SA node follows appropriate conduction

Normal sinus rhythm originates in the sa node follows

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Normal Sinus Rhythm Originates in the SA node, follows appropriate conduction pathways. Rhythm: Regular Rate: 60-100 bpm Every P has a QRS and every QRS has a P PRI: 0.12-0.20 seconds QRS: 0.08 -0.12 seconds, narrow
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Sinus Tachycardia Originates in the SA node. Rapid rhythm which occurs with increased oxygen demand ( exercise, infection, hypovolemia, hypoxia, MI, and to stimulant drugs). Rhythm: regular/fast Rate: > 100 bpm Every P has a QRS and every QRS has a P PRI: .12 - .20 seconds QRS: normal
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Atrial Problems Atrial Flutter Atrial Fibrillation
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Atrial Flutter Characterized by “saw tooth” atrial activity Conduction ratio to the ventricles 2:1 – 8:1. ( usually 2:1-4:1) Caused by a reentrant circuit located in the right atrium. May occur in COPD, hypoxia, intrinsic cardiac disease, valve disease, pericarditis or post operatively. If >150 bpm, may seriously compromise cardiac output. Treatment is rate control, cardioversion, surgical or catheter ablation. Rate: atrial rate 250-400 (generally 300bpm)
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Atrial Flutter TREATMENT TREAT UNDERLYING CAUSE  IRRITABILITY,  RAPID VENTRICULAR RESPONSE DIGOXIN SLOWS RATE BY ENHANCING AV BLOCK QUINIDINE SUPRESSES ATRIAL ECTOPIC BEATS AMIODARONE CALCIUM CHANNEL & β- BLOCKERS CONSIDER CARDIOVERSION
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51 Atrial Fibrillation Deviation from NSR No organized atrial depolarization (contraction), so no normal P waves (impulses are not originating from the sinus node).
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