3 Lead ECG and the ECG Waveform

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This set of flashcards covers key concepts related to the 3 lead ECG and ECG waveform including definitions, historical figures, and the significance of various ECG components.

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10 Terms

1
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What does the Electrocardiogram (ECG) record?

The electrical activity of a large mass of atrial and ventricular cells as specific waveforms and complexes.

2
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What is the purpose of electrodes in an ECG system?

Electrodes contain the conductive media applied to the patient’s skin to record electrical activity.

3
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What does a 'lead' refer to in ECG terms?

Both the actual tracing obtained and the position of the electrode.

4
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Who invented the first practical electrocardiogram (ECG)?

Dr. Willem Einthoven.

5
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What does the P wave represent in an ECG?

Atrial contraction.

6
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What is the significance of the QRS complex in an ECG?

Ventricular contraction.

7
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What does the T wave indicate in an ECG?

Ventricular repolarization.

8
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What are the components of a segment in an ECG?

A line between waveforms.

9
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Define the PR segment in an ECG.

The horizontal line between the end of the P wave and the beginning of the QRS complex.

10
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What does the QT interval represent?

Total ventricular activity: depolarization to repolarization.