Showing posts with label ecg. Show all posts
Showing posts with label ecg. Show all posts

Wednesday, April 10, 2013

Electrocardiography (ECG)

Introduction

  • The ECG is a basic investigation that is widely used in medicine
  • You are guided through a module based on your objectives.
  • This package teaches you the important fundamentals of recording a 12-lead ECG and labeling the ECG.
  • Numerous patient cases are provided for evaluation while your understanding of material will be tested at the end of the module

Normal activation of the heart

  • The resting potential is maintained by ionic gradients across the cells with a higher sodium concentration outside and higher potassium concentration inside
  • Following a stimulus, a rapid inward movement of sodium occurs causing a loss of the negative internal potential. This is called as depolarization.
  • This is followed by repolarization, a slower process than depolarization where the potassium moves out of the cell

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