1 / 21

Prepeared By Dr: Manal Moussa

Electrocardiogram. Prepeared By Dr: Manal Moussa. Electrocardiogram Definition: ECG is a graphic record of the electrical currents that are generated by the heart. Purposes: The nurse performs a 12- lead ECG to: 1- Provide information about the electrical system of the heart.

cosima
Download Presentation

Prepeared By Dr: Manal Moussa

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Electrocardiogram Prepeared By Dr: Manal Moussa

  2. Electrocardiogram Definition: ECG is a graphic record of the electrical currents that are generated by the heart.

  3. Purposes: The nurse performs a 12- lead ECG to: 1- Provide information about the electrical system of the heart. 2- Record cardiac electrical activity for diagnostic or documentary reasons. 3- Diagnose myocardial infarction. 4- Detect cardiac enlargement. 5- Differentiate between different types of dysrrhythmias. 6- Determine the effects of administered drugs and/or electrolytes on the heart's electrical system.

  4. Conductive system of the heart: *The Sino Atrial node (S.A node) has the highest rate of depolarization in the whole system. It starts each heart beat (pace maker). *From the S.A node, the impulse spreads to the atria through Bachmann's Bundle to the left atrium. *Stimulation of the atria produces the P wave on the ECG. After that a brief delay at the atrioventricular node (A.V node) to allow the atria sufficient time to squeeze additional blood into the ventricles.

  5. *Then the impulse travels to the Bundles of His • down the left and right bundle branches and • terminates in the Purkinje fibers resulting in • contraction of the ventricles. • * The result of electrical stimulation of the • ventricles produces QRS complex on ECG. • *After that the relaxation of the cardiac muscle • occurs which represent T wave in ECG.

  6. -Interpretation of ECG leads: Bipolar limp leads:* Lead I (LI): When the ECG is attached to the right and left arms. It represents the difference in electrical impulse between these two points. Lead II (LII): When the ECG is attached to the right arm and left leg. It represents the difference in electrical impulse between these two points. Lead III (LIII): When the ECG is attached to the left arm and left leg. It representsthe difference in electrical impulse between these two points.

  7. aVR: Located in right arm. Records the changes in electrical current occurring in the part of heart which faces the right shoulder. aVL: Located in left arm. Records the changes in electrical current occurring in the part of heart which faces the left shoulder. aVF: Located in left leg. Records the changes in electrical current occurring in the part of heart which faces the left leg.

  8. Chest or precordial leads: Chest leads: V1-----fourth intercostals space (ICS) at right sternal border. V2-----Fourth ICS at left sternal border. V3-----Midway between V2 and V4. V4-----Fifth ICS at midclavicular line. V5-----Left anterior axillary line at level of V4. V6-----Left midaxillary line at level of V4 horizontally.

  9. Procedure:

  10. V. Documentation: Record in the patient's chart: -Patient's name. -Age. -Diagnosis. -Date. -Time of procedure.

  11. Rule of 300- Divide 300 by the number of boxes between each QRS = rate

  12. THANK YOU

More Related