Chapter 16 - Cardiovascular Emergencies

Question 1

Automaticity

Answer 1

Allows a cardiac muscle cell to contract spontaneously without a stimulus from a nerve source.

Question 2

Crackles (Rales)

Answer 2

Abnormal lung sounds characterized by discontinuous clicking or rattling sounds. They can sound like salt dropped onto a hot pan or like cellophane being crumpled.

Question 3

Ischemia

Answer 3

A lack of oxygen that deprives tissues of necessary nutrients, resulting from partial or complete blockage of blood flow; potentially reversible because permanent injury has not yet occurred.

Question 4

Infarction

Answer 4

Death of a body tissue, usually caused by interruption of its blood supply.