Download Electrocardiography: - Lower Merion School District

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

page
1
page
2
page
3
page
4
page
5
page
6
Document related concepts
no text concepts found
Transcript 
Electrocardiography:
ECGs or EKGs
Electrocardiograph
• Records electrical activity of cardiac
muscle
• Graph showing all action potentials
generated by nodal & contractile cells
Reading an EKG
• EKGs have 3 deflections (waves)
– 1st: P wave: ~ 0.08s; occurs from
depolarization from SA node through atria
2nd: QRS complex: ~ 0.08s; occurs from
depolarization of ventricles, right before
ventricular systole
– 3rd: T wave: ~.16s; occurs from repolarization
of ventricles
Uses of EKGs
• Detecting arrhythmias (irregular heart
beats)
– Tachycardia: significantly increased heart rate
– Brachycardia: significantly decreased heart
rate
Related documents