ECG Review Part 1

What is the leading cause of death among both men and women in the United States?

• Stroke

• Coronary artery disease (CAD)

• Diabetes

• Cancer

What can early detection of coronary artery disease be accomplished with?

• General physical examination

• Specialized cardiac testing

• Blood pressure monitoring

• Regular exercise

What is the procedure for recording electrical changes in the heart called?

• Echocardiography

• Angiography

• Electrocardiography

• Radiography

What can be sensed throughout the body that is created by the heart's cardiac conduction system?

• Electrical charges

• Blood flow

• Muscle contractions

• Hormone levels

What are electrodes placed on specific areas of the skin used to detect?

• Blood pressure

• Cardiac electrical charges

• Body temperature

• Oxygen levels

What is the purpose of transmitting cardiac electrical charges to a computer?

• To measure blood sugar levels

• To amplify the signal and record it on paper (ECG)

• To monitor respiratory rate

• To check for muscle strength

What does an upward or downward deflection from the horizontal baseline on an electrocardiogram represent?

• Electrical charge

• Heart rate

• Blood pressure

• Oxygen level

What is the term used for movement away from the baseline on an electrocardiogram?

• Amplitude

• Deflection or wave

• Frequency

• Cycle

What do waves or deflections that go up (positive) or down (negative) from the baseline represent on an electrocardiogram?

• Heart rate

• Blood pressure

• Amplitude or voltage

• Oxygen saturation

What determines the size of deflection in an electrocardiogram (ECG)?

• The speed of the electrical impulse

• The strength or voltage of the electrical impulse

• The duration of the electrical impulse

• The frequency of the electrical impulse