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Questions and Answers
What is the primary purpose of electrocardiography?
What is the primary purpose of electrocardiography?
- To record the heart's electrical activity through repeated cardiac cycles (correct)
- To measure the overall magnitude of the heart's electrical potential
- To monitor inadequate coronary artery blood flow
- To detect changes in the normal ECG pattern
Which cardiac abnormalities can lead to changes in the normal ECG pattern?
Which cardiac abnormalities can lead to changes in the normal ECG pattern?
- Cardiac murmurs, myocardial infarction, and myocardial ischemia
- Cardiac rhythm disturbances, inadequate coronary artery blood flow, and electrolyte disturbances (correct)
- Aortic valve stenosis, ventricular tachycardia, and atrial fibrillation
- Pulmonary embolism, pericarditis, and hypertrophic cardiomyopathy
What do the electrodes in electrocardiography detect?
What do the electrodes in electrocardiography detect?
- The blood flow through coronary arteries
- Small electrical changes resulting from cardiac muscle depolarization followed by repolarization during each cardiac cycle (correct)
- The heart rate and rhythm
- The overall voltage of the heart's electrical potential
How are ECG signals recorded in a conventional 12-lead ECG?
How are ECG signals recorded in a conventional 12-lead ECG?
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"ECG" usually refers to which type of ECG?
"ECG" usually refers to which type of ECG?
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