Chapter 21

Question 1

angina pectoria

Answer 1

chest pain caused by insufficient blood flow to the heart

Question 2

arterioschleroisis

Answer 2

hardening or fibrosis of the arteries

Question 3

atheroschlerosis

Answer 3

accumulation of fatty deposits in the walls of arteries

Question 4

AV

Answer 4

atrioventricular, as in the AV node

Question 5

chronic heart failure (CHF)

Answer 5

heart disease caused by weakness of the contractile force of the myocardium

Question 6

conduction system

Answer 6

specialized cardiac tissue that transmits electrical impulses and regulates the activity of the heart

Question 7

coronary artery disease (CAD)

Answer 7

disease of the coronary arteries that decreases blood flow to the heart

Question 8

depolarization

Answer 8

the decrease in electrical potential across a cell membrane that results in excitation and generation of an action potential

Question 9

electrocardiogram (ECG)

Answer 9

recording of the electrical activity of the heart

Question 10

ischemia

Answer 10

condition of insufficient tissue blood flow

Question 11

myocardial infraction (MI)

Answer 11

sudden death of an area of heart muscle commonly referred to as a heart attack

Question 12

myocardium

Answer 12

the muscular layer of the heart

Question 13

repolarization

Answer 13

return of the electrical potential across a cell membrane to its resting state following depolarizations

Question 14

SA

Answer 14

sinoatrial, as in the SA node