Exam 42: Principles of Electrocardiography

On an ECG recording, five 5-mm boxes are seen between the R waves. What is the patient's heart rate per minute?

The P wave occurs during the contraction of the __________ and shows the beginning cardiac depolarization.

Six-channel ECG strips must be cut and mounted before they are placed in the patient's medical record.

Which of the following artifacts appears as a series of uniform small spikes on the ECG paper?

The first three leads recorded are called the standard, or __________, limb leads, because they each use two limb electrodes to record the heart's electrical activity.

Tachycardia is defined as

If the ECG recording appears as a series of irregular, jagged peaks, the medical assistant should

Which of the following is not an immediate treatment for a heart attack?

ECG paper has horizontal and vertical lines at __________ intervals.

The electrical activity of the heart is initiated in specialized tissue called the __________, which is located in the superior-posterior wall of the right atrium.

What part of the ECG complex represents atrial depolarization?

Which statement is true about lead II?

A diary of daily activities is part of the procedure for performing which of the following?

Lead I records the electrical activity between the right arm and the left arm.

A cardiac __________ is a diagnostic procedure performed to evaluate the patient's myocardial response to measured exercise.

The T wave indicates ventricular recovery, or __________, of the ventricles.

Which of the following leads is placed in the fifth intercostal space, at the left midclavicular line?

The electrodes of the ECG carry cardiac electrical impulses into the machine, where they are magnified by an amplifier.

A cardiac event monitor must be worn at all times, even during bathing, to detect cardiac abnormalities.

Patients with a history of V-fib may be treated with an ICD.