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anatomy > Conduction system > Flashcards

Conduction system Flashcards

1
Q

❤️ conduction system

A

network : nodes, cells & signals > controls > heart beat

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2
Q

2 types : cell > controls hb

A
  1. conducting cell
  2. muscle cell
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3
Q

conducting cell

A

carry electrical signal

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4
Q

muscle cell

A

controls > ❤️ contraction

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5
Q

Automaticity

A

HR can begin / maintain rhythmic activity w/o aids : nervous system

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6
Q

Excitability

A

cardiac muscle > accepts / responds > electrical impulse

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7
Q

conductivity

A

cardiac cell > transfer electrical impulse > neighboring cardiac cell

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8
Q

contractility

A

❤️ responds > electrical impulses by contacting

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9
Q

how does electrical conduction perform w/ rest ?

A

electrical conduction system keep up a steady, even HR.
helps your ❤️ speeds up when you need more blood / oxygen or slow down when it is time to rest

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10
Q

part : conduction system

A

contains special cells / node > control your HB

  1. sinoatrial node (SA Node)
  2. bachmanns bundle (BMB)
  3. Atrioventricular node (AVB)
  4. bundle : his (B:H) / atrioventricular bundle ( AVB)
  5. RT BB
  6. LT BB
  7. Purkinje Fiber (PF)
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11
Q

Another name for sinoatria node
( SA Node)

A

pacemaker

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12
Q

sinoatria node

A

sends electrical impulse > start HB

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13
Q

sinoatria node location

A

upper part : ❤️ RT atrium, it at edge : atrium near SVC

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14
Q

sinoatria node fires electrical impulses:

A

60-100 time per min ( normal HR)

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15
Q

autonomic nervous system

A

controls how fast / slowly > SA node sends electrical signal

  • nervous system directs hormones > controls HR based on WYD
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16
Q

sympathetic nervous system

A

( fight / flight)

makes > SA node works faster, ^ HR

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17
Q

parasympathetic nervous system

A

(rest/digest)

makes > SA node works slower / decrease HR

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18
Q

bachmann bundle (BMB)

A

cardiac impulse > carried both atria by internal tract

19
Q

BMB responsible for

A

bringing “ depolarization wave” across LT atrium

20
Q

Atrioventricular node ( AV node )

A

delays > SA node electrical signal
by consistent amount : time.
( fraction : sec ) each time

21
Q

SA node delay ensure

A

atria = empty : blood before before contraction stop

22
Q

atria located

A

upper chamber

23
Q

aria receives blood from … and empty …

A

body / ventricle

24
Q

AV node located

A

Posterior portion : interatrial septum

lies > subendocarial > medial wall : Rt atrium > Lt : ostium : coronary sinus & immediately posterior > basal attachment : septum cusps : TV

25
Q

another name for Bundle : His
( bundle branches)

A

Atrioventricular bundle (AVB)

26
Q

Bundle : His
( bundle branches) receives electrical signal to … & firing rate :

A

AV node & 40-60 BMP

27
Q

B:H has how many branches

A

2

  1. RT BB
  2. LT BB
28
Q

RT BB

A

sends electrical signal > PF > RT vent

29
Q

LT BB

A

sends electrical signal > PF > LT Vent

30
Q

Purkinje fiber sends electrical signal very … & firing rate :

A

quickly & 20 -40

31
Q

Depolarization : ❤️

A

orderly passage : electrical current sequentially > ❤️ muscle, changing it, cell by cell > resting polarized state > depolarized state until entire ❤️ > depolarized

32
Q

repolarization

A

stage : action potential > cells experience > decrease : voltage due > efflux : potassium (K) ions along it electrochemical gradient

  • phase occurs after cell reaches > highest voltage > depolarization
33
Q

P - wave Impulses initiated by

A

sinoatria node ( SA node) > spread over atria

34
Q

what does P wave represents ?

A

Electrical activity associated w / spread : impulse over atria

35
Q

Another name for P wave

A

wave : depolarization / activity : atria

36
Q

QRS complex

A

wave : depolarization spread > SA node over > BB ( HIS) & Purkinje system > activate both vents simultaneously

37
Q

P-R interval is measured at

A

beginning: P wave & beginning : QRS complex

38
Q

P-R interval indicates

A

time > elapses b/w activation : SA node & AV node

39
Q

J-point

A

point where QRS complex joint ST segment

40
Q

J-point represents

A

Approximate end : depolarization & end : repolarization

41
Q

T wave represents

A

Ventricle repolarization

42
Q

U wave represents

A

Depolarization : PF

43
Q
A

anatomy (10 decks)

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