Sinus rhythms - Normal sinus rhythm (NSR), Bradyarrhythmia and Conduction Blocks - 1st degree AV block, Tachyarrhythmias - Wide-complex tachycardias., Pulseless rhythms - Pulseless electrical activity (PEA), Atrial Dysrhythmias - Atrial fibrillation (aFib), Normal Sinus Rhythm - HR: 60-100 BPM (at rest), Sinus Bradycardia - HR: <60 BPM (at rest), Sinus Tachycardia - HR: >100 BPM (at rest), 1st Degree Heart Block - P-wave may be buried in the preceding T-wave, 2nd Degree AV Block Type I (Mobitz Type I, Wenckebach’s) - Progression occurs until the QRS complex is dropped, 2nd Degree AV Block Type II (Mobitz Type II) - PR interval is > 0.20 seconds and consistent (not gradually getting longer) but drops a beat, 3rd Degree AV Block (complete heart block, CHB) - P-P intervals are normal but do not relate to the QRS complex, Supraventricular Tachycardia (SVT) - Treatment: Vagal maneuvers, Adenosine, synchronized cardioversion, Atrial Fibrillation (aFib), Atrial Flutter, Ventricular Tachycardia (vTach), Pulseless Ventricular Fibrillation (vFib) - Treatment: Defibrillation, epinephrine, amiodarone, lidocaine HCl, Characterized by a chaotic and disorganized wave pattern, Often responsive to electrical defibrillationProlonged PR interval due to delay in AV signal transmission, Progression occurs until the QRS complex is dropped,

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