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Normal EKG P wave: Atrial depolarization PR interval: < 0.20 sec

Normal EKG P wave: Atrial depolarization PR interval: < 0.20 sec QRS complex: ventricular depolarization QRS interval < 0.10 sec SA 0.10 – 0.12 supraventricular > 0.12 sec ventricular. Sinus Bradycardia. Sinus tachycardia. Pathophysiology: none. It’s a sign of something else.

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Normal EKG P wave: Atrial depolarization PR interval: < 0.20 sec

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  1. Normal EKG • P wave: Atrial depolarization • PR interval: < 0.20 sec • QRS complex: ventricular depolarization • QRS interval • < 0.10 sec SA • 0.10 – 0.12 supraventricular • > 0.12 sec ventricular

  2. Sinus Bradycardia

  3. Sinus tachycardia • Pathophysiology: none. It’s a sign of something else. • Criteria: • Rate > 100 bpm • Rhythm: sinus • PR: < 0.20 • QRS: normal • Fever, exercise, hypovolemia, adrenergic stimulation.

  4. Sinus Tachycardia

  5. Sinus Arrhythmia

  6. Atrial Fibrillation/Flutter • Pathophysiology: Atrial impulses faster that SA. Reentry pathway • Criteria: • Rate: depends on atrial conduction • Rhythm: irregularly irregular • PR: cant diagnose. No P waves • QRS: narrow • CAD, CHF, vavular disease, hypoxia, drugs

  7. Atrial Fibrillation

  8. Atrial Flutter

  9. PSVT • Pathophysiology: Reentry • Criteria: • Rate: > 150 bpm • Rhythm: regular • PR interval: cant see P waves • QRS: Narrow. • Accessory conduction pathway, CAD, COPD, CHF

  10. Paroxysmal Supraventricular Tach

  11. Multifocal Atrial Tach • Pathophysiology: Increased areas of automaticity. • Criteria: • Rate: greater than 120 bpm • Rhythm: irregular • PR: variable (3 or more P waves) • QRS: narrow • COPD

  12. Multifocal Atrial Tachycardia

  13. 1st degree block • Pathophysiology: slowed conduction • Criteria • Rate: slow < 60 bpm • Rhythm: regular • PR: > 0.20 second • QRS: narrow • Drugs (av nodal blockers, β-blockers, Ca+2 channel blockers, inferior MI.

  14. 1st degree heart block

  15. 2nd degree block I • Pathophysiology: AV node • Criteria • Rate: Regular or < 60 bpm • Rhythm: Regular with pause • PR: Progressive lengthing • QRS: narrow (until dropped) • Drugs, parasympathetic tone, RCA

  16. 2nd degree type I - mobitz 1 - wenckebach

  17. 2nd degree block II • Pathophysiology: Below the AV node • Criteria • Rate: Different between atrial and ventricular • Rhythm: Atrial – regular, vent – irregular • PR: normal • QRS: narrow (dropped beat) • ACS (LCA)

  18. 2nd degree heart block type II – mobitz 2

  19. 3rd degree block • Pathophysiology: no impulses from Atria • Criteria • Rate: Atrial – 60, ventricular – 40 • Rhythm: regular • PR: none • QRS: narrow or wide • ACS (LCA)

  20. 3rd degree heart block – complete heart block

  21. Premature Ventricular Contraction - PVC

  22. Multi focal PVC

  23. Bigeminy

  24. Couplets and Triplets

  25. R on T phenomenon

  26. Ventricular Tachycardia

  27. Ventriucular Fibrillation

  28. Asystole

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