Lesson 4E, ECG (electrocardiogram)

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10 Terms

1
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What is an ECG?

  • It records the alectrical activity of cardiac muscle

  • Detects electrical currents between charged depolarized and charged repolarized cells

2
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What are the uses of an ECG?

  • Study Cardiac function

  • Identify disorders of myocardium and conduction system

3
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What does the P wave indicate?

Atrial deporlarization

4
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What does the QRS complex indicate?

  • Rapid ventricular depolarization

  • The repolarization of the atrium occurs during this but is overshadowed by the ventricular depolarization

5
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What does the T wave indicate?

  • Ventricular repolarization

  • Ventricles relax

6
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<p>Is this a normal or abnormal ECG?</p>

Is this a normal or abnormal ECG?

It is a normal ECG

7
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<p>Is this a normal or abnormal ECG</p>

Is this a normal or abnormal ECG

Abnormal ECG

8
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<p>What is 1?</p>

What is 1?

P wave

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<p>What is 2?</p>

What is 2?

QRS complex

10
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<p>What is 3?</p>

What is 3?

T wave