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EKG TECHNICIAN > Quiz 3 > Flashcards

Quiz 3 Flashcards

1
Q

Conduction system

A

The cardiac conduction system is a group of specialized cardiac muscle cells in the walls of the heart that send signals to the heart muscle causing it to contract

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2
Q

Circulatory system

A

Organs of transport of different fluids that have the task of bringing to the cells the elements necessary for their livelihood

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3
Q

QRS Complex

A

When the ventricles contract or depolarization of the ventricles

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4
Q

P wave

A

First wave in the cardiac cycle; represents atria depolarization and the spread of the electrical impulse throughout the left and right atria

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5
Q

T wave

A

Waveform that follows the QRS complex

And represents ventricular repolarization

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6
Q

Conduction system

A

A system of pathways in the heart composed of specialized (pacemaker ) cells

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7
Q

R wave

A

On an EKG the first positive deflection in the QRS complex
Representing ventricular depolarization; I’m pacing, R wave refers to the entire QRS complex, denoting an intrinsic ventricular event

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8
Q

Repolarization

A

Movement of the ions across a cell membrane in which the inside of the cell is restored to its negative charge

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9
Q

Sinoatrial node (function)

A

Primary pacemaker; initiates impulse that is normal conductes throughout the left and right atria

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10
Q

Sinoatrial node ( location)

A

Right atrial wall just inferior to opening of superior vena cava

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11
Q

Purkinje Fibers (location)

A

Ventricular myocardium

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12
Q

Coronary system (circulation)

A

Coronary circulation is the circulation of blood in the blood vessels of the heart muscle

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13
Q

AV node is also known as the ?

A

Gatekeeper ( holds back)

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14
Q

What 3 systems work together to make the heart beat efficiently ?

A

Coronary conduction and circulatory

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15
Q

Atrioventricular node (av node)

A

A group of cells that conduct an electrical impulse through the heart located in the floor of the right atrium

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16
Q

Atrioventricular node ( time lapse from sa node )

A

0.03

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17
Q

Sinoatrial node ( intrinsic pacemaker (beats per minute))

A

60-100

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18
Q

Sinoatrial node ( time lapse from SA node )

A

0 seconds

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19
Q

Atrioventricular bundle

A

Bundle of His

20
Q

Bundle of His ( intrinsic pacemaker) (beats per minute)

A

40-60 beats per min

21
Q

Right and left bundle branches ( function)

A

Receives impulse from bundle of His and relays it to the Purkinje Fibers

22
Q

Right and left bundle branches (location)

A

Interventricular septum

23
Q

Right and left bundle branches ( intrinsic pacemaker (beats/minute)

A

40-60 beats per min

24
Q

Right and left bundle branches ( time lapse from sa node )

A

0.17 seconds

25
Q

Atrioventricular node (function)

A

Receives impulse from SA node and delays relay of the impulse to the bundle of His, allowing time for the atria to empty there contents into the ventricles before the onset of ventricular contraction

26
Q

Atrioventricular node ( intrinsic pacemaker( beats per min)

A

40-60 beats a minute

27
Q

Atrioventricular node ( location)

A

Floor of the right atrium immediately behind the tricuspid valve and near the opening of the coronary sinus

28
Q

Electrolytes

A

Elements of compounds that break into charged particles (ions) when melted or dissolved in water or another solvent (important for the heart)

29
Q

Electrical conduction system

A

This process allows blood to be pumped throughout the body
Transmits signals generated usually by the SA node to cause contraction of the heart muscle. The pacemaking signal generated in the sinoatrial node travels through the right atrium to the atrioventricular node along the bundle of His and through the heart muscle. This signal stimulates contraction first of then right and left atrium, and then the right and left ventricles

30
Q

Bundle of His

A

Fibers located in the upper portion of the interventricular septum that receive an electrical impulse from the AV node and conduct the impulse to the right and left bundle branches

31
Q

Depolarization

A

Contracting phase

32
Q

SA node is also known as ?

A

The pacemaker

33
Q

What is the hearts natural pacemaker ?

A

SA node

34
Q

Purkinje Fibers

A

Fibers found in both ventricles that conduct an electrical impulse through the heart

35
Q

PR interval

A

P wave plus the PR segment; reflects depolarization of the right and left atria (p wave) and the spread of the impulse through the AV node, AV bundle right and left bundle branches and the Purkinje fibers (PR segment)

36
Q

Polarized state

A

Period after repolarization of a myocardial cell( also called the resting state) when the outside of the cell is posturing and the interior of the cell is negative

37
Q

Myocardial cells

A

Working cells of the myocardium that contain contractile filaments and form the muscular layer of the atrial walls and the thicker muscular layer of the ventricular walls

38
Q

Depolarization

A

Movement of ions across a cell membrane, causing the inside of the cell to become more poaitive; an electrical event expected to result in contraction

39
Q

AV bundle

A

The bundle of His

40
Q

Purkinje fibers and what do they do ?

A

Conduct electricity into the ventricular wall ( don’t carry blood)

41
Q

Purkinje Fibers (time lapse from SA node ( seconds))

A

0.20to 0.22 seconds

42
Q

Purkinje fibers ( intrinsic pace maker ( beats per min))

A

20 to 40 beats per minute

43
Q

Purkinje Fibers ( function)

A

Receives impulse from bundle branches and relays it to ventricular myocardium

44
Q

Bundle of His ? Time lapse from SA node )

A

0.04 seconds

45
Q

Bundle His (location)

A

Superior portion of interventricular septum

46
Q

Bundle of His (function)

A

Receives impulse from AV node and relays it to right and left bundle branches

47
Q

Sinoatrial node

A

Normal pacemaker of the heart that normally discharges at a Ruth mix rate of 60to 100 beats per minute

EKG TECHNICIAN (1 decks)

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