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ECG Dysrhythmias

ECG Dysrhythmias. Updated March 2006: D. Tucker, RPh, BCPS. Overview. ECG waveforms Normal sinus rhythm Asystole Bradycardia Ventricular fibrillation Ventricular tachycardia. ECG Rhythm Strip. Electrocardiogram or ECG is used to measure the activity of the heart

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ECG Dysrhythmias

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  1. ECG Dysrhythmias Updated March 2006: D. Tucker, RPh, BCPS

  2. Overview • ECG waveforms • Normal sinus rhythm • Asystole • Bradycardia • Ventricular fibrillation • Ventricular tachycardia

  3. ECG Rhythm Strip • Electrocardiogram or ECG is used to measure the activity of the heart • ECG is used to represent the conduction of electrical impulses from the atria to the ventricles • ECG is used to characterize rhythms and conduction abnormalities of the heart

  4. ECG Waveforms

  5. ECG Waveforms healthcentral.org

  6. Normal Sinus Rhythm • Normal impulse conduction through the heart • Normal sinus rhythm (NSR) is the standard against which all other rhythms are compared • NRS contains no ectopic or aberrant beats

  7. ECG Rhythms • Normal sinus rhythm healthcentral.org

  8. ECG Rhythms • Asystole • Bradycardia • Ventricular fibrillation • Ventricular tachycardia healthcentral.org

  9. Asystole • Asystole is a cardiac standstill, i.e., flatline • Asystole is the absence of electrical activity in the venticles • Asystole usually results from a prolonged period of cardiac arrest without resuscitation • Asystole usually means the patient’s life has ended

  10. ECG Rhythms • Ventricular asystole healthcentral.org

  11. Bradycardia • Bradycardia is when the heart is < 60 beats/minute or when the heart rate is slower than expected • Sinus bradycardia usually occurs as a response to a reduced demand for blood flow • Signs and symptoms might include: • Chest pain, shortness of breath • Hypotension, pulmonary edema, congestive heart failure

  12. ECG Rhythms • Sinus bradycardia healthcentral.org

  13. Ventricular Fibrillation • Ventricular fibrillation (VF) occurs as a result of electrical impulses coming from multiple ectopic pacemaker in the ventricles • VF results in no cardiac output as a result of producing no effective ventricular contractions • With VF the ventricular muscle quivers instead of contracting

  14. ECG Rhythms • Ventricular fibrillation healthcentral.org

  15. Ventricular Tachycardia • Ventricular tachycardia (VT) is a result of 3 or more ventricular contractions occur earlier than expected resulting in a ventricular rate of >10 beats/minute • VT usually preceeds VF • Causes of VT include myocardial ischemia, heart failure, drug toxicity from procainamide, quinidine, or cocaine

  16. ECG Rhythms • Ventricular tachycardia healthcentral.org

  17. Name TheseECG Rhythms C A D E B healthcentral.org

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