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Pathophysiology > Chapter 28 > Flashcards

Chapter 28 Flashcards

1
Q

What does the cardiac conduction system?

A

Controls how fast and direction of electrical impulse conduction of heart
-maintains pumping efficiency

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2
Q

**Cardiac conduction system
What cell picks up the electrical nodes of the heartbeat?

A

Myocardial cells

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3
Q

What are the phases of cardiac potentials?

A

Phase 0:Rapid upstroke of action potential
Phase1:Early repolarization
Phase 2: Plateau
Phase 3:Final repolarization period
Phase 4: Diastolic repolarization period

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4
Q

**Cardiac potentials
What is phase 0?

A

Rapid upstroke of action potential: Sodium comes intro myocyte cell

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5
Q

**Cardiac potentials
What is Phase1 ?

A

Early repolarization: potassium comes out of cell

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6
Q

**Cardiac potentials
What is Phase 2?

A

Plateau: Calcium comes in

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7
Q

**Cardiac potentials
What is phase 3?

A

Final repolarization : Potassium comes out

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8
Q

**Cardiac potentials
What is phase 4?

A

Diastolic repolarization period. Resting potential

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9
Q

What is the electrodiagraphy of heart?

A

Graphic representation of heart
- the purpose is to figure out how electricity is being picked up through heart

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10
Q

What is pwave ?

A

atrial depolarization and atrial contraction

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11
Q

What is qrs complex?

A

Ventricular depolarization and ventricular contraction

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12
Q

What is T wave?

A

Ventricular repolarization and ventricular rest

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13
Q

What is dysrhythmia?

A

Abnormal activities in electrical readings of the heart

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14
Q

What is sinus bradycardia?

A

A slow heart rate( less than 60 beats/ per minute)
-P wave precedes each heart rate. Only a few qrs complex

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15
Q

What is sinus tachycardia?

A

A rapid heart rate (Higher than 100 beats/per minute)

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16
Q

What is sinus Arrhythmia?

A

Modification in function of SA node leads to the rhythm of heartbeat to change
-Looks like irregular spaces between beats

17
Q

What is atrial fibrillation?

A

Rapid unorganized activation of atrial which can range from 400 to 600
-Looks like quivering squiggly lines between qrs looks irregular

18
Q

What is atrial flutter?

A

Atria is contracting faster than ventricles.
240 to 340 hb
-Contractions look like butterfly
-Looks like a jaw, jagged

19
Q

what is supraventricular tachycardia ?

A

Cardiac rhythm starts distal tot the bundle of his and contains p wave
could go up to 250hb
Almost like v tack tomb stones because of their big arch

20
Q

What is ventricular fibrillation?

A

Ventricle quivers but does not contract, which means there is no cardiac output
Looks like small quivers

21
Q

What is Asystole?

A

No rhythm at all. Basically dead

Pathophysiology (33 decks)

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