anatomy 18 - Clinical view electrocardiogram Simply a...

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- Clinical view: electrocardiogram o Simply a recording of heart electrical activity o If you know how to read them, it’s a wonderful diagnostic tool o 70 bpm = avg when you’re sitting You’re going through a cycle (from beginning of a heart beat to the end of it- including relaxation) = 8/10 of a second o Graph of a typical healthy heart baseline (straight line), represents heart relaxtion its not beating, there is no current going through it o body is designed by nature to survive 120 years o heart spends a lot of the cycle relaxed P wave Atrial depolarization / atrial contraction QRS complex Ventricular depolarization / ventricular contraction T wave Ventricular repolarization o (atrial repolarization occurs simultaneously with ventricular depolarization, so it doesn’t show up on the graph) - Hole in the heart = fossa ovalis did not close completely after birth - Heart cycle o Begin process with the heart relaxed
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