CH 5 Electrocardiogram

Question 1

Graphic representation of electrical activity of the heart

Answer 1

Electrocardiogram

Question 2

A pair of electrodes such as chest lead I, II, MCL

Answer 2

Lead

Question 3

Abnormal heart rhythms

Answer 3

Dysrhythmias

Question 4

Have one positive electrode and one negative electrode

Answer 4

Bipolar Leads

Question 5

(isoelectric line): the straight line seen on an EKG strip; it represents the beginning and end point of all waves

Answer 5

Baseline

Question 6

Wave or waveform recored on an EKG strip refers to movement away from baseline or isoeletric line and is represented as a positive deflection ( above the isoelectric line) or as a negative deflection( below the isoelectric line)

Answer 6

EKG Waveforms

Question 7

Represents depolarization of the left and right atria

Answer 7

P Wave

Question 8

Represents the time interval necessary for the impulse to travels from the SA node through the internodal pathway in the atria and downward to the ventricles. normal intervals are from 0.12 to 0.20

Answer 8

PR Interval

Question 9

Consists of the Q,R and S waves and represents the conduction of the electrical impulse from bundle of His throughout the ventricular muscle, or ventricular depolarization. normal QRS complex 0.12 sec

Answer 9

QRS Complex

Question 10

The time interval during which the ventricles are depolarized and ventricular repolarization begins

Answer 10

ST Segment

Question 11

Represents ventricular repolarization and follows the ST segment

Answer 11

T Wave