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Electrocardiography

Electrocardiography (ECG) is a noninvasive diagnostic device that shows the heart's electrical activity, beating rate, and rhythm. Originating in the early 1900s, ECG technology has evolved to help detect various heart conditions. During an ECG test, leads are placed on the patient's skin, connecting them to the machine to record electrical impulses. This data is then printed for analysis. ECG serves multiple purposes, from monitoring heart rates during surgery to detecting irregular rhythms and heart attacks. Newer technologies like smartphone ECG apps are also emerging, offering convenient monitoring solutions. Explore the history, workings, and significance of ECG through this informative guide.

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Electrocardiography

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  1. By Michelle Ramsey Electrocardiography

  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 <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/>

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