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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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What does the Electrocardiogram (ECG) record?
The electrical activity of a large mass of atrial and ventricular cells as specific waveforms and complexes.
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.
What does a 'lead' refer to in ECG terms?
Both the actual tracing obtained and the position of the electrode.
Who invented the first practical electrocardiogram (ECG)?
Dr. Willem Einthoven.
What does the P wave represent in an ECG?
Atrial contraction.
What is the significance of the QRS complex in an ECG?
Ventricular contraction.
What does the T wave indicate in an ECG?
Ventricular repolarization.
What are the components of a segment in an ECG?
A line between waveforms.
Define the PR segment in an ECG.
The horizontal line between the end of the P wave and the beginning of the QRS complex.
What does the QT interval represent?
Total ventricular activity: depolarization to repolarization.