Understanding Heart Electrical Activity

The recording of the electrical activity of the heart is a what?

• None of the above.

• Cardiac conduction.

• Electrocardiogram.

• Depolarization.

This refers to a change in electrical charge from negative to positive within the heart cells:

• Cardiac conduction.

• Repolarization.

• Depolarization.

• None of the above.

Depolarization results in the heart muscle relaxing:

• True.

• False.

This refers to a change in electrical charge from positive back to negative:

• Repolarization.

• Cardiac conduction.

• Depolarization.

• All the above.

Each lead provides a view of the heart based on the electrical activity between two or more electrodes:

• True.

• False.

Electrodes contain a special gel to permit electrical conduction from the skin to the lead wire and on the EKG machine:

• True.

• False.

Produces a long record of the heart activity if the patient must be monitored on an EKG machine on an ongoing basis:

• Resting electrode.

• Telemetry.

• None of the above.

• Continuous monitoring.

Ambulatory monitors are usually placed on the patient in a doctor's office and removed after:

• 12-48 hrs.

• 12-24 hrs.

• None of the above.

• 24-48 hrs.

You will rarely perform the posterior EKG:

• False.

• True.

The augmented limb leads measure voltage at a positive pole in comparison to a neutral reference point:

• False.

• True.