This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: - 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 At all times, blood is continuously, blood is entering left and right atriums...
View Full Document
This note was uploaded on 03/18/2009 for the course BS 240 taught by Professor Zink during the Spring '09 term at University of the Sciences in Philadelphia.
- Spring '09