Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

EKG > Ch. 2 Key Terms > Flashcards

Ch. 2 Key Terms Flashcards

1
Q

Action potential

A

Change in electrical potential of the heart muscle when it’s stimulated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Aorta

A

Largest artery in the body
Transports oxygenated blood from the left ventricle to the entire body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Aortic semilunar valve

A

Located in the aorta and prevents backflow of blood into the left ventricle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Atrioventricular (AV) node

A

Delays the electrical impulse to allow the atria to complete their contraction (atrial kick)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Atrium (plural: atria)

A

Top two chambers of the heart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Automaticity

A

Ability of the heart to initiate an electrical impulse without being stimulated by an independent source

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

AV bundle

A

The Bundle of His

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Bachmann’s bundle

A

Structure that relays the electrical impulse from the SA node to the left atrium in a normal heart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Bundle branches

A

Left and right Bundle Branches of the Bundle of His that conduct impulses down either side of the interventricular septum to the left and right ventricles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Bundle of His (AV bundle)

A

Next to AV node
Provides transfer of the electrical impulse from the atria to the ventricles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Cardiac cycle

A

Contraction and relaxation of the heart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Chordae tendineae

A

Structures that connect the atrioventricular (tricuspid and mitral) valves to the papillary muscles and prevent them from opening in the wrong direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Complexes

A

Atrial or ventricular depolarizations as they appear on the ECG
Complete ECG waveforms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Conductivity

A

Ability of the heart cells to receive and transmit and electrical impulse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Contractility

A

The ability of the heart muscle cells to shorten in response to an electrical stimulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Coronary circulation

A

Circulation of blood to and from the heart muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Deoxygenated blood

A

Blood that has little or minimum oxygen (oxygen-poor blood)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Depolarization

A

Electrical activation of the cells of the heart that initiates contraction of the heart muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Diastole

A

Phase of the cardiac cycle when the heart is expanding and refilling
Aka the relaxation phase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Excitability

A

Ability of the heart muscle cells to respond to an impulse or stimulus
Aka irritability

21
Q

Interval

A

Period of time between two activities of the heart

22
Q

Interventricular septum

A

Partition or wall (septum) that divides the right and left ventricles

23
Q

Ischemia

A

Sudden loss/reduction of blood supply (oxygen) to a region of the heart tissue
Occurs due to the presence of atherosclerotic plaque, blood clot, emboli, or vascular spasms (Prinzmetal’s angina)

24
Q

Isoelectric

A

Period when the electrical tracing of the ECG is at zero or a straight line, no positive or negative deflections are seen

25
Q

Left atrium

A

Left upper chamber of the heart that receives oxygenated blood from the lungs

26
Q

Left ventricle

A

Left lower chamber of the heart, which pumps oxygenated blood throughout the body
Biggest and strongest chamber (workhorse of the heart) bc of this role

27
Q

Mitral (bicuspid) valve

A

Valve with two cusps or leaflets located between the left atrium and left ventricle
Prevents backflow of blood into the atrium

28
Q

Myocardial

A

Pertaining to the heart (cardia) muscle (myo)

29
Q

Oxygenated blood

A

Blood having oxygen (oxygen-rich blood)

30
Q

Papillary muscles

A

Muscles in the ventricle that anchor the chordae tendineae and atrioventricular valves

31
Q

Parasympathetic

A

Branch of the autonomic nervous system that helps slow the heart rate

32
Q

Pericardium

A

Two-layered sac of tissue enclosing the heart

33
Q

Polarization

A

State of cellular rest in which the inside is negatively charged, and the outside is positively charged

34
Q

Pulmonary artery

A

Large artery that transports deoxygenated blood from the right ventricle to the lungs
Only artery in the body that carries deoxygenated blood

35
Q

Pulmonary circulation

A

Transportation of blood to and from the lungs
Blood is oxygenated in the lungs during this

36
Q

Pulmonary semilunar valve

A

Valve found in pulmonary artery that prevents backflow of blood into the right ventricle during pulmonary circulation

37
Q

Pulmonary veins

A

Transport oxygenated blood back into the left atrium of the heart
Only veins in the body that carry oxygenated blood

38
Q

Purkinje fibers

A

Fibers within the heart that distribute electrical impulses from cell to cell throughout the ventricles

39
Q

Purkinje network

A

Spreads the electrical impulses throughout the ventricle by means of the Purkinje fibers

40
Q

Repolarization

A

Return of heart muscle cells to their resting electrical state, causing the heart muscle to relax

41
Q

Right atrium

A

Right upper chamber of the heart
Receives deoxygenated blood from the body

42
Q

Right ventricle

A

Right lower chamber of the heart
Pumps deoxygenated blood into the lungs

43
Q

Segment

A

Portion/part of the electrical tracing produced by the heart

44
Q

Semilunar valve

A

Valve with half-moon-shaped cusps that open and close, allowing blood to travel only one way
Located in pulmonary artery and aorta

45
Q

Sinoatrial (SA) node

A

In the area of specialized cells in the upper right atrium that initiate the heartbeat

46
Q

Sympathetic

A

Branch of the autonomic nervous system that causes an increase in the heart rate

47
Q

Systemic circulation

A

Pathways for pumping blood throughout the body and back to the heart

48
Q

Tricuspid valve

A

Valve located between the right atrium and right ventricle
Prevents backflow of blood into the right atrium

49
Q

Vena cava (plural: venae cavae)

A

Largest vein in the body, which provides a pathway for deoxygenated blood to travel from the body to the right atrium
Upper portion: superior vena cava; Blood comes from head arms, and upper body
Lower portion: inferior vena cava; Blood comes from the lower body and legs

EKG (19 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions