Heart Valves Flashcards

(46 cards)

1
Q

Where is the tricuspid valve located

A

Between the right atrium and right ventricle

Tip: tricuspid is closer to R in the alphabet

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2
Q

Where is the mitral valve located

A

Between the left atrium and left ventricle

Tip: think mitral follows L for LEFT

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3
Q

What is the mitral valve also known as?

A

Bicuspid valve

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4
Q

Endocardium is located where?

A

It is the inner most layer of the heart

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5
Q

Where is the myocardium located

A

It is the muscular layer of the heart

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6
Q

Where is the pericardium located

A

It is the protective sac that encloses the heart

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7
Q

Where is the pulmonic valve located

A

Between the right ventricle and pulmonary artery

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8
Q

Where is the aortic valve located

A

Between the left ventricle and aorta

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9
Q

What are semi lunar valves?

A

They are the valves located between the ventricles and major arteries…. They are called the pulmonic and aortic valves.

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10
Q

During diastole are the mitral and tricuspid valves constricted or relaxed?

A

They are relaxed.

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11
Q

During systole are the aortic and pulmonic valves constricted or relaxed?

A

They are relaxed.

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12
Q

When you hear diastole what valves must you think of

A

Tricuspid and mitral

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13
Q

When you hear systole, what valves must you think of

A

Aortic and pulmonic

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14
Q

Where are the coronary arteries located

A

On the epicardial layer of the heart

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15
Q

What does the (RCA) right coronary artery supply

A

RCA supplies the right atrium and right ventricle

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16
Q

What does the Cardiac system comprised of

A

Systole and diastole

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17
Q

What is systole

A

Contraction of the atria and ventricles

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18
Q

What is diastole

A

Relaxation of the heart

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19
Q

When do the ventricles and coronary arteries fill with blood

A

During diastole

20
Q

What is stroke volume

A

Amt of blood ( in cc) ejected from the ventricles with each heart beat.

21
Q

What is stroke volume affected by?

A

Pre load, after load, and contractility

22
Q

What is normal stroke volume

A

60-130 cc/ beat

23
Q

What is contractility

A

Extent and velocity of fiber shortening: (calcium involved)

24
Q

What is cardiac output

A

Amt of blood ejected from the heart per minute

25
How is cardiac output determined
HR X SV
26
What is normal CO
4-8 liters/ minute
27
What is blood pressure affected by
Cardiac output and peripheral vascular resistance
28
What are chronotropic effects
Changes in the HR
29
What is positive chronotropic
Increase in HR
30
What is negative chronotropic
Decrease in HR
31
What are inotropic effects
Change in contractility or strength of heart beat..... Can be positive or negative
32
What are the 2 major sub divisions of the autonomic nervous system
Sympathetic and parasympathetic
33
Describe the sympathetic nervous system
It secretes epinephrine and norepinephrine It increases HR,BP, conduction thru AV conduction system, contractility, myocardial oxygen consumption; causes coronary vasodilation
34
Describe the parasympathetic nervous system
It secretes acetylcholine | Slows HR, decreases contractility
35
Ectopic beats
Any tissue in the heart that becomes excited and produces a premature beat.
36
SA NODE ( sino-atrial)
Located in the right atrium near the entrance of the SVC | Chief pacemaker of the heart
37
Where is the AV junction ( atrioventricular) located
Located at base of right atrium in junction between atria and ventricles
38
What are the 3 main functions of the AV junction
1. Slows conduction thru AV node to allow time for atrial kick 2. serves as back up pacemaker at a rate of 40-60 bpm 3. Blocks some of the impulses from being conducted to the ventricles when the atrial rate is rapid.
39
Atrial kick
Last blood being dropped in ventricles
40
What is the bundle of His
Specialized conducting fibers from the AV node that converge into bundle of tissue ( His bundle) Part of the conduction system that Leads into the bundle branches
41
P WAVE
Atrial depolarization... Short
42
PR
Onset of atrial depolarization to the onset of ventricular depolarization
43
QRS
VENTRICULAR DEPOLARIZATION
44
ST
END OF VENTRICULAR DEPOLARIZATION AND START OF REPOLARIZATION
45
T
LATTER PHASE OF VENTRICULAR REPOLARIZATION
46
What are rules of electrical flow of the heart
1. Electrical flow of the heart travels in a right to left and downward direction 2. Flow towards a positive electrode will have a + ( upright) complex 3. Flow away from a + electrode will have a - ( downward) complex