1. Electrocardiography By Michelle Ramsey

2. What is it?  A diagnostic device  Shows the hearts electrical activity  Noninvasive  Shows the hearts beating rate  Heart beat regularity

3. History  Early 1900s  Einthoven  Submerging limbs into salt water  Nobel Peace Prize

4. How It Works  3-12 pads placed on skin  Leads connect the patient to the ECG machine  Records electrical impulses  Results printed out for a hardcopy and displayed on the devices screen

5. Leads  Connect the patient to the ECG machine  Range from about 3-12  May be placed commonly on the right/left arm, right/left leg, intercostal space, mid-clavicular line, mid-axillary line, anterior axillary line

6. Why?  Cardiac murmurs  Seizures  Monitoring during surgery  Monitoring critically ill patients  Slow/fast heart rates  Detect past and future heart attacks  Irregular heart rhythm

7. Newer Technology

8. References  [1] A Basic Overview.  [2] A Normal ECG.  [3] Rhythm Recognition  [4] How An ECG Reads Electrical Activity  [5] ECG At Your Healthcare Provider http://www.umm.edu/ency/article/003868.htm  [6] iPhone and ECG http://techcrunch.com/2010/12/30/iphonecg-iphone-heart-