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By Michelle Ramsey. Electrocardiography. What is it?. A diagnostic device Shows the hearts electrical activity Noninvasive Shows the hearts beating rate Heart beat regularity. History. Early 1900s Einthoven Submerging limbs into salt water Nobel Peace Prize. How It Works.
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By Michelle Ramsey Electrocardiography
What is it? • A diagnostic device • Shows the hearts electrical activity • Noninvasive • Shows the hearts beating rate • Heart beat regularity
History • Early 1900s • Einthoven • Submerging limbs into salt water • Nobel Peace Prize
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
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
Why? • Cardiac murmurs • Seizures • Monitoring during surgery • Monitoring critically ill patients • Slow/fast heart rates • Detect past and future heart attacks • Irregular heart rhythm
References • [1] A Basic Overview <http://voices.yahoo.com/a-basic-overview-ecg-waveform-1040017.html>. • [2] A Normal ECG <http://www.learntheheart.com/NormalEKG.html>. • [3] Rhythm Recognition <http://learntech.uwe.ac.uk/manacuteill/Default.aspx?pageid=1902> • [4] How An ECG Reads Electrical Activity <http://www.drsegal.com/medstud/ecg/howecg.htm> • [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- monitor/>