Chapter 07 Basic Electrocardiogram Monitoring - Terms

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1

Angina

A severe constricting pain or sensation in the chest that may radiate to shoulder or arm; related to coronary artery disease

2

Cardiogram

The tracing that depicts the heart's electrical activity

3

Depolarization

Process by which cardiac muscle cells change from a more negatively charged to a more positively charged intracellular state

4

Dysrhythmia

A disorder of the formation or conduction of the electrical impulses in the heart that alters the heart rate or rhythm or both

5

Hemodynamic

Factor affecting the force and flow of circulating blood

6

Myocardial infarction

Death of heart tissue resulting from lack of oxygenated blood flow

7

Myocardial ischemia

Insufficient oxygenation of the tissues of the heart muscle

8

Normal sinus rhythm

A pacing impulse that begins in the sinus node and travels normally down the electrical conduction pathways

9

Oscilloscope

The screen on which ECG patterns appear

10

Repolarization

Cardiac muscle cells return to a more negatively charged intracellular condition (their resting state)

11

Thrombus

A collection of platelets, fibrin, and clotting factors that attaches to the interior wall of a vein and may result in occlusion of a vessel