Electrocardiogram (EKG, ECG)

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Introduction: As the heart undergoes depolarization and repolarization, the electrical currents that are generated spread not only within the heart, but also throughout the body.  This electrical activity generated by the heart is generally measured by an array of electrodes placed on the body surface and the resulting tracing is called an electrocardiogram (ECG, or EKG).  A "typical" ECG tracing is shown below.  The different waves that comprise the ECG represent the sequence of depolarization and repolarization of the atria and ventricles. 

Directions:
Go to  http://www.oucom.ohiou.edu/CVPhysiology/A009.htm
Read the information given on how to read a ECG.

Activity: The following examples are possible ECG readings. Predict what abnormality may cause:

  1. Increase in P-Q interval

  2. Increase in QRS duration

  3. Upside P

  4. Flattened or prolonged T interval

  5. What would a EKG look like if the patient was undergoing ventricular fibrillation

  6. What would a EKG look like if the patient was undergoing Tachycardia

  7. What would a EKG look like if the patient was undergoing Brachycardia

  8. What would a EKG look like if the patient was undergoing atrial flutter