Exam 49: Principles of Electrocardiography

In the case of __________, the patient has general malaise and muscle cramps.The condition may occur if diuretics are used without potassium supplementation.

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

In which direction should arm electrodes be pointed when attached to the patient in preparation for the ECG?

The patient must be placed in the supine position for an ECG, even if the person has the symptoms of dyspnea and orthopnea.

Describe the placement of each precordial lead.

__________ refers to a regular heart rate that ranges from 60 to 90 bpm.

The __________ is a combination of all of the electric events that occur in the heart during a single heartbeat.

The __________ leads use two limbs to record the heart's electrical activity.

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

After electrical stimulation the ventricles contract, emptying oxygen-rich blood into the pulmonary artery.

The P wave is a reflection of atrial repolarization.

Which deflection from the baseline represents the repolarization of the ventricles?

Bradycardia is defined as:

What information should be documented on the ECG strip?

Patients should hold their breath during the brief seconds necessary to record an ECG.

The __________ controls the rate of heart contraction by initiating contractions 60 to 100 times a minute.

The most distal portions of the electrical system of the myocardium are the __________.

Documentation for an ECG should include whether the patient smoked a cigarette within 15 minutes of the procedure.

Summarize the immediate treatment of an MI.Explain why certain medications are administered.

__________ records the electrical activity from midway between the left leg and the left arm to the right arm.