Table of Contents
ECG MCQs
1. An ECG is a recording of the electrical activity of the heart.
2. The ECG displays the heart’s rhythm (or pulse) and electrical activity.
3. The ECG is used to diagnose heart problems and to monitor the effects of treatment.
4. The ECG traces are usually printed on paper, but they can also be displayed on a computer screen.
5. The ECG traces are read by a doctor, who looks for abnormalities in the heart’s rhythm and electrical activity.
MCQs on Electrocardiography or ECG
An electrocardiogram (ECG) is a graphic record of the electrical activity of the heart. It is produced by attaching electrodes to the skin on the chest and recording the tiny electrical impulses that originate from the heart muscle.
The ECG is a valuable diagnostic tool because it can detect problems with the heart’s electrical activity. It can also help to determine the cause of chest pain, shortness of breath, or other symptoms.
The normal ECG tracing is a flat line. The heart’s electrical activity causes small waves to appear on the ECG tracing. These waves are measured in millimeters (mm) and are called “P-waves,” “Q-waves,” “R-waves,” and “S-waves.”
The P-wave represents the electrical activity that spreads out from the top of the heart and the Q-wave represents the electrical activity that spreads out from the bottom of the heart. The R-wave represents the electrical activity that occurs when the heart’s muscles contract and the S-wave represents the electrical activity that occurs when the heart’s muscles relax.
