Brainscape's Knowledge GenomeTM

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


See full index

G2 2017-2018 > Anatomy - Thoracic Cavity: The Heart Part 1 > Flashcards

Anatomy - Thoracic Cavity: The Heart Part 1 Flashcards

1
Q

12 components of the superior mediastinum?

A
  1. SVC2. L/R brachiocephalic veins3. Aortic arch + 3 branches4. Thoracic duct5. Trachea6. Esophagus7. Thymus8. L/R Vagus nerve9. L recurrent laryngeal nerves10. L/R phrenic nerves11. L/R pulmonary arteries12. Ligamentum arteriosum
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

3 components of anterior inferior mediastinum?

A
  1. Thymus2. Lymph nodes3. Connective tissue
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

5 components of middle inferior mediastinum?

A
  1. Pericardium2. Heart3. Roots of great vessels4. Arch of the azygos vein5. Main bronchii
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

8 components of posterior inferior mediastinum?

A
  1. Esophagus2. Thoracic aorta3. Azygos system of veins4. Hemiazygos5. Vagus nerve6. Symphathetic trunks7. Thoracic splanchnic nerves8. Thoracic duct
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the 11 physiological systems?

A
  1. Integumentary2. Skeletal3. Muscular4. Nervous5. Endocrine6. CV7. Lymphatic8. Respiratory9. Digestive10. Urinary11. Reproductive
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Are all 11 physiological systems found in the mediastinum?

A

YUP

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

Anterior border of mediastinum?

A

Sternum

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

Posterior border of mediastinum?

A

Vertebral column

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

Superior border of mediastinum?

A

Thoracic aperture

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

Inferior border of mediastinum?

A

Diaphragm

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

Lateral borders of mediastinum?

A

Lungs

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

In which parts of the mediastinum do we find the same structures?

A

ALL

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

Incidence of CVD?

A

1:5 males and females

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

What is the leading cause of morbidity and mortality in the US and other developed countries? For how long has this been going on?

A

Congenital and acquired heart diseasesSince 1900 (except 1918)

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

How many deaths per year in the US due to some sort of heart disease?

A

1 million

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

What % of sudden deaths are due to heart disease?

A

90%

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

What % of sudden cardiac deaths occur in men?

A

75%

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

Who are the main victims of cardiac deaths?

A

Males between 45 and 64 (90%)

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

Do women die more of breast cancer or heart disease?

A

Heart disease: 1:4 vs 1:9 (develop it)

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

How many Americans have 1 or more types of CVD?

A

Over 60 million

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Does CVD claim more lives each year than the next 6 leading causes of death combined?

A

YUP (almost 10,500 more)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What 5 things did the Greeks think they knew about the heart in 280 B.C.?

A
  1. 4 main vessels: arteries and veins2. Heart has 2 sides3. Right side was the only one to hold blood and did not pump4. Left side contained intelligence5. Valves were present at the root of great vessels
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

When was the heart recognized as a pump?

A

270 B.C.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What 3 variables contribute to the development of heart disease?

A
  1. Aging2. Disease3. Lifestyle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What can red wine reduce the risk of?

A
  1. CVD2. Alzheimer’s3. Cancer
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

How often does the heart beat in an average adult?

A

70 times/min at rest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Does the heart beat faster or slower in marathon runners?

A

Slower: 50 times/min at rest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What quantity of blood does the heart pump every day?

A

1800 gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Is the heart heavier in men or women? By how much?

A

Heavier in men: 300 g vs 250-275 g

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What are the 4 components of the CV system?

A
  1. Heart2. Vascular system 3. Volemia4. Pulmonary microcirculation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Is the vascular system open or closed?

A

CLOSED

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

What is the volemia portion of the CV system?

A

The blood volume that fills up the vascular system at a given pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

What is the pulmonary microcirculation of the CV system?

A

A gas-exchange system between the blood and the surround environment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What are the 2 layers of the pericardial sac?

A
  1. Fibrous pericardium2. Serous pericardium
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

What is the fibrous pericardium?

A

The outermost layer of the pericardium made of tough connective tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What attaches to the fibrous pericardium superiorly, inferiorly, and anteriorly?

A
  1. Superiorly: tunica adventitia of SVC2. Inferiorly: central tendon of diaphragm 3. Anteriorly: posterior surface of the sternum
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

What is the main function of the fibrous pericardium?

A

Protect the heart from sudden over filling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

What are the 2 layers of the serous pericardium? Describe each.

A
  1. Parietal: outer layer lining the inner surface of the fibrous pericardium2. Visceral: inner layer covering the external surface of the heart
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Which other organs have a 2 layers membrane (visceral and parietal)?

A

Lungs (pleura)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

What is another name for the visceral serous pericardium?

A

Epicardium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

Is there a space between the 2 layers of the serous pericardium?

A

Yes, but it’s a potential space with a tiny amount of fluid to lubricate it (secreted by the serous membrane) and does not become a true space unless there is a pathology

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Why are we asked to hold our breath during X-rays?

A

Because the fibrous pericardium is bound to the diaphragm and the heart will not be accurately depicted if we are breathing (aka the diaphragm is moving)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

Which is more common: AP or PA?

A

PA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

What is the potential space between the 2 serous pericardial layers called?

A

Pericardial cavity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

What are 5 possible causes of pericardial pathological conditions?

A
  1. Pericarditis 2. Pericardial effusion3. Cardiac tamponade 4. Cardiomegaly5. Hemopericardium
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

What is pericarditis? 2 possible causes?

A

Inflammation of the pericardium1. Virus2. Bacteria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

What is pericardial effusion?

A

Pericardial cavity becomes a real space with fluid build-up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

What is cardiac tamponade?

A

Heart compression due to pericardial effusion or hemopericardium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

What is hemopericardium? Treatment?

A

Blood fills up pericardial cavityTreatment: pericardiocentesis (draining)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

What does the suffix “-itis” mean?

A

Inflammation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

How do bacteria or viruses reach the pericardial space?

A

Piece of fascia extends from base of the skull to the thorax

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

What is a common cause of bacterial pericarditis? How can this be avoided?

A

Oral surgeryProphylactic antibiotics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

What are 3 potential causes of cardiac tamponade?

A
  1. Ruptured aortic aneurism2. Ruptured myocardial infarct 3. Penetrating injury
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

Can any blood born pathogen have potential access to the pericardial sac?

A

YUP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

What are the 5 signs of cardiac tamponade?

A
  1. Elevated venous pressure 2. Distended neck veins 3. Distant heart sounds4. Patient in variable degrees of shock5. Decreased arterial and pulse pressures
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

What does pathognomic mean?

A

Characteristic for a particular disease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

Is the elevated venous pressure a pathognomic sign of cardiac tamponade?

A

YUP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

Is the decrease arterial and pulse pressures a pathognomic sign of cardiac tamponade? What does this mean?

A

NOPEUnreliable for diagnosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

What is pulse pressure?

A

The difference between the systolic and diastolic pressure readings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

Where exactly is pericardiocentesis performed? Why? Other name for this area?

A

Bare area of the pericardium = Larrey’s area => just inferior to the 5th rib (5th intercostal space) about 1 inch to the left of the sternumNo lung overlying this area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

What is an aneurysm? Vessels in which this is most commonly found? Long-term consequence?

A

Excessive sac-like localized enlargement of a vessel due to vessel weakeningMost commonly found in abdominal aorta and carotid arteries LT consequence: bursting due to gradual worsening of the weakening of the wall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

What is a ruptured myocardial infarct?

A

TBD

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

What does “in extremis” mean?

A

In extreme circumstances; especially: at the point of death

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

How does venous pressure increase during cardiac tamponade?

A

Linearly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

What is jugular venous distention called? When is this observed?

A

Kussmaul’s sign During inspiration, when the venous pressure in the jugulars is supposed to decline

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

What are the 4 signs of pericarditis?

A
  1. Atypical chest pain2. High-pitched friction rub3. Effusion (mimics cardiac tamponade)4. Exudate associated with acute disease
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

To where can the fluid in the pericardial space drain to?

A

Two cardiac sinuses = spaces created by the reflections of the serous pericardium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

Where are the borders of the 2 cardiac sinuses?

A

Where the visceral pericardium extends off the surface of the heart to become continuous with the parietal pericardium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

What are the 2 cardiac sinuses? Where is each located?

A
  1. Oblique pericardial sinus: formed by reflections onto the pulmonary veins: inferior to the level of the pulmonary veins, posterior to the heart2. Transverse pericardial sinus: separates arteries from veins, superior to the level of the pulmonary veins, posterior to the pulmonary trunk/ascending aorta between them and the SVC
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

Are the 2 cardiac sinuses connected?

A

NOPE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

How is one of the cardiac sinuses exploited during bypass surgery?

A

The location of the transverse one is exploited as a surgical clamp is introduced into the space and blood flow of the aorta/pulmonary trunk is stopped momentarily before great vessels are connected to the bypass machine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
72
Q

Describe the heart borders in the anatomical position.

A
  1. Right border: right atrium2. Anterior border: right ventricle3. Left border: left ventricle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
73
Q

Can one see the left atrium from the anterior view of the heart in anatomical position?

A

NOPE (very very small portion)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
74
Q

Why does the heart need its own blood supply instead of just using the blood inside of it?

A

Because its walls are so thick that the blood does not have time to diffuse across the heart tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
75
Q

Are the roots of the great vessels inside the pericardium?

A

YUP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
76
Q

Where do the coronary arteries reside?

A

Grooves, or sulci, on the surface of the heart

77
Q

How were the sulci on the surface of the heart produced?

A

By tissue folding during embryonic development

78
Q

What are the 2 sulci of the surface of the heart? Describe the position of each.

A
  1. Coronary sulcus: between the atria and the ventricles circumscribing the entire heart2. Interventricular sulcus: between the ventricles on both the anterior and posterior surfaces of the heart
79
Q

What is another name for the coronary sulcus?

A

Atrioventricular sulcus

80
Q

What are the 2 coronary arteries?

A

Right and left

81
Q

What arteries does the left coronary artery give rise to? Describe their location.

A
  1. Left anterior descending (LAD) artery: in the interventricular sulcus traveling inferiorly2. Circumflex branch artery: in the atrioventricular sulcus, traveling posteriorly
82
Q

Where is the right coronary artery located? What branches does it give rise to?

A

Located in the atrioventricular sulcus and gives rise to:1. Sinoatrial node branch: traveling superior to SA node near the origin of the right artery2. Right marginal branch: traveling anteriorly and inferiorly along the surface of the right ventricle3. Posterior interventricular branch (PIB) traveling inferiorly in the posterior interventricular sulcus and supplying the AV node

83
Q

Which coronary artery is called the widow maker?

A

LAD

84
Q

What does heart dominance refer to?

A

Refers to which side of the heart is responsible for giving rise to the posterior interventricular arteryMost people (85%) are right heart dominant

85
Q

What are the 4 major branches of the coronary veins? Describe their location and size.

A
  1. Great cardiac vein: LARGE, in the anterior interventricular sulcus 2. Middle cardiac vein: MEDIUM, in the posterior interventricular sulcus 3. Small cardiac vein: SMALL, along the inferior margin of the heart4. Anterior cardiac veins: SMALL, on anterior border of RA and RV
86
Q

Which are more superficial: coronary arteries or veins?

A

Veins

87
Q

Where do all of the cardiac veins drain?

A

All in the coronary sinus of the RA, except for the anterior cardiac veins which drain directly into the RA

88
Q

Where is the coronary sinus located?

A

Runs along the posterior atrioventricular sulcus, medial to the IVC

89
Q

What is another name for the left anterior descending (LAD) artery

A

Anterior interventricular artery

90
Q

Where are marginal branches of the coronary arteries located?

A

Run towards the apex of the heart

91
Q

From which branch does the posterior interventricular branch arise in left heart dominant patients?

A

The circumflex artery

92
Q

Can people be heart co-dominant?

A

YUP, but very rare

93
Q

How to assess whether there is a circulatory issue in the coronary vessels?

A

Angiogram

94
Q

What is angiogram?

A

Imaging technique used to assess the blood flow through any vessel by injecting a contrasting dye into the vessels, which will spread if there is no blockage or clot

95
Q

How are the coronary arteries accessed in an angiogram?

A

Catheter is inserted into the femoral artery and passed in a retrograde manner through the aorta into the coronary arteries (VERY invasive)

96
Q

What is an angiogram of arteries called?

A

Arteriogram

97
Q

What area will be oxygen deprived by a blood clot or plaque that occludes a vessel?

A

The area DISTAL to the blood clot

98
Q

What is it called when a blood clot or plaque blocks coronary artery circulation?

A

Myocardial ischemia

99
Q

What is a major risk factor for myocardial ischemia?

A

High blood cholesterol

100
Q

Who performed the first angiogram of the heart?

A

Werner Theodor Otto Forssman (later became a Nazi)

101
Q

What are the 6 sites of coronary occlusion in order of frequency?

A
  1. Anterior interventricular branch of the left coronary artery (or LAD) (40-50%)2. Right coronary artery (30-40%)3. Circumflex branch of the left coronary artery (15-20%)4. Left coronary artery5. Posterior interventricular branch of the right coronary artery6. Marginal artery branch of the right coronary artery
102
Q

What is a common complication of coronary ischemia? How fast does this occur?

A

Ischemic necrosis of the heart (tissue death)Within 20-30 min after occlusion+ cardiac tamponade

103
Q

What is the clinical presentation of myocardial ischemia?

A
  1. Angina pectoris = pressure, discomfort, or feeling of choking in the left chest that radiates to the left shoulder and arm as well as the neck, jaw/teeth, abdomen, and back (referred pain)2. Shortness of breath3. Nausea/vomiting4. Perspiration5. Weakness, collapse, coma
104
Q

Where does MI usually begin? Why?

A

In the subendorcardium because most poorly perfused region of the ventricular wall

105
Q

What is the patency of vein grafts?

A

7 to 9 years

106
Q

What are the 3 treatments for myocardial ischemia?

A
  1. Coronary artery by-pass surgery2. Percutaneous transluminal angioplasty3. Stents
107
Q

What is another name for coronary artery by-pass surgery?

A

Cabbage

108
Q

Describe coronary artery by-pass surgery.

A

The internal thoracic artery (right or left) or the great saphenous vein (right or left) are used as graft to create an alternate path for blood to flow around the occluded coronary artery.

109
Q

What needs to be done if the great saphenous vein is used during coronary artery by-pass surgery?

A

Reverse the direction of the vein since it has valves OR turn it inside out

110
Q

Where is the great saphenous vein found?

A

The thigh

111
Q

Which has better long-term results: coronary artery by-pass surgery using the great saphenous vein or the internal thoracic artery? Why?

A

Internal thoracic artery, because:1. Arterial grafts so do not have valves2. Better match size 3. Easy to harvest 4. Low vasoconstrictor sensitivity and high vasodilator sensitivity

112
Q

Describe percutaneous transluminal angioplasty.

A

Method in which a deflated balloon catheter is placed in the vessel blockage and inflated to crush the blockage to re-establish circulation

113
Q

What is saphenous vein graft disease? Treatment?

A

Complication after coronary artery by-pass surgery where the vein presents a diffuse and friable plaque and often a thrombusTreatment: stents

114
Q

Describe how stents are used in the coronary arteries. When is this often done?

A

Stent often coated with anticoagulants is inserted using a catheter in the femoral artery and placed at the site of blockage to help the vessel stay patent (usually during the angioplasty intervention)

115
Q

What is a major complication of stents? Who does this often happen to?

A

If the patient has an accident he will bleed very quickly (usually to death) because of the anticoagulants on the stent Elderly who fall a lot or have another type of surgery

116
Q

How are the heart chambers arranged in the anatomical position?

A

Like a cross (counter clockwise starting at 12): LA - LV - RV - RA

117
Q

What is the anterior chamber of the heart?

A

RV

118
Q

What is the posterior chamber of the heart?

A

LA

119
Q

Which heart chamber is most often contused in car accidents?

A

RV

120
Q

What is a contusion?

A

A region of injured tissue or skin in which blood capillaries have been ruptured

121
Q

Diastole?

A

Ventricular relaxation and filling with atrial contraction at the end

122
Q

Systole?

A

Ventricular contraction and emptying

123
Q

When are the atria directly above the ventricles?

A

Oblique cut of the heart

124
Q

What are the 4 components of the RA?

A
  1. Pectinate muscles2. Fossa ovalis3. Cristae terminalis4. Vessels that drain into the RA
125
Q

What are the 4 vessels that drain in the RA? Where are they located?

A
  1. SVC2. IVC3. Coronary sinus4. Anterior cardiac veins Posterior wall
126
Q

Where are the pectinate muscles located in the RA? Function?

A

Horizontal rough inner surface of the anterior wallAllow for atrial contraction

127
Q

What is the thinnest portion between the RA and LA?

A

Fossa ovalis

128
Q

What are the cristae terminalis?

A

Longitudinal smooth raised ridge running superior to inferior on the lateral border of the RA and separates the anterior and posterior walls

129
Q

Other name for pectinate muscles?

A

Musculi pectinati

130
Q

Where is the fossa ovalis located in the RA?

A

Posterior wall

131
Q

What % of coronary circulation returns to the heart via the coronary sinus?

A

95%

132
Q

What are the 4 components of the RV?

A
  1. Tricuspid valve 2. Papillary muscles/chorda tendinae3. Septomarginal trabecula 4. Trabeculae carneae
133
Q

What are the different cusps of the tricuspid valve?

A
  1. Anterior2. Posterior3. Septal
134
Q

By what are the 3 cusps of the tricuspid valve connected to the papillary muscles?

A

Via cordae tendinae

135
Q

What is another name for the septomarginal trabecula?

A

Moderator band

136
Q

Function of septomarginal trabecula?

A

Connects the interventricular septum to the base of the anterior papillary muscles

137
Q

What does the septomarginal trabecula contain? Function?

A

The right bundle of the conducting system of the heart => carries signals for muscle contraction to the papillary muscles

138
Q

What are the trabeculae carneae? Function?

A

Muscular ridges roughening the inner surfaces of the RV wall to help support the walls of the ventricles

139
Q

How do the papillary muscles work?

A

Contract to prevent cusps from prolapsing back into the RA during ventricular contraction => aka they hold the cusps shut (but do not actively close them) to prevent them from leaking when the heart contracts

140
Q

What does failure of the papillary muscles lead to?

A

Valve prolapse, which we hear as a heart murmur

141
Q

What are the 4 components of the LV?

A
  1. Mitral valve 2. Papillary muscles/chorda tendinae3. Septomarginal trabecula 4. Trabeculae carneae
142
Q

Other name for mitral valve?

A

Bicuspid valve

143
Q

What are the different cusps of the mitral valve?

A
  1. Anterior2. Posterior
144
Q

Difference between papillary muscles in RV and LV? Explain why.

A

Not as prominent in LV because the left ventricle wall is thicker, so the papillary muscles are located closer to the mitral valve

145
Q

Difference between muscular wall in RV and LV?

A

Much thicker in LV

146
Q

What is unique about the LA compared to the other heart chambers?

A
  1. It does not sit on the diaphragm (large gap between the 2)2. It rests directly on the esophagus posteriorly (soft vertical bump on LA if you remove the heart) - both are perpendicular to each other
147
Q

What is a common cause of LA enlargement? Explain. How to diagnose? Common symptom?

A

Mitral valve stenosis: blood backs up in LA and causes it to grow larger Diagnosis using PA chest X-ray which will show double shadow of the LA Symptom: trouble swallowing (drink fluids to help)

148
Q

What is the only organ that receives the ENTIRE cardiac output?

A

Lungs

149
Q

Are the 2 pumps of the heart arranged in series or parallel? Implication?

A

Series: the LV must receive the same amount of blood per beat as the RV

150
Q

Only veins in body to carry oxygenated blood?

A

Pulmonary veins

151
Q

What does vein mean?

A

Carries blood to the heart

152
Q

What does artery mean?

A

Carries blood away from the heart

153
Q

Which AV valve is stronger: tricuspid or mitral? Why? Implication?

A

Mitral because it only has 2 cusps and needs to withstand so much more pressure Increase in pressure from LA to LV is 10x higher

154
Q

What are the 2 semilunar valve?

A
  1. Pulmonary valve2. Aortic valve
155
Q

What does the SVC drain?

A

Body above diaphragm, excluding the heart, lumbar azygos, and hemiazygos veins

156
Q

What does the IVC drain?

A

Body below diaphragm

157
Q

What 2 factors propel blood from atria to ventricles?

A
  1. Gravity2. Contraction
158
Q

How do heart valves open and close

A

Respond to differences in BPs on either side of the valves

159
Q

How do the semilunar valves work?

A
  • Ventricular contraction causes their cusps to flatten against great vessel walls - Ventricular relaxation causes blood to backflow and shut them closed
160
Q

Do both atrioventricular valves close at the same time?

A

NOPE, mitral closes slightly before and opens slightly after

161
Q

Do both semilunar valves close at the same time?

A

NOPE, aortic closes slightly before and opens slight after

162
Q

What allows the 4 heart valve closures to be distinctly heard with a stethoscope?

A

The difference in timing of their closing

163
Q

What is the lub sound of the heart?

A

AV valves closing

164
Q

What is the dub sound of the heart?

A

Semilunar valves closing

165
Q

Describe the 5 steps of the cardiac cycle.

A
  1. Beginning of diastole: closure of semilunar valves2. Early diastole: opening of AV valves3. Late diastole: atrial contraction4. Early systole: closure of AV valves5. Systole: ventricular contraction and opening of semilunar valves
166
Q

What plane do ALL the heart valves lie on?

A

Plane of coronary sulcus

167
Q

Are the heart valves heard at the skin level where they are located?

A

NOPE, downstream from the blood flow

168
Q

Where to listen to aortic valve?

A

Right side of sternum below rib 2

169
Q

Where to listen to tricuspid valve?

A

Left side of sternum below rib 5

170
Q

Where to listen to mitral valve?

A

Bare area of the pericardium = just inferior to the 5th rib about 1 inch to the left of the sternum

171
Q

Where to listen to pulmonary valve?

A

Left side of sternum below rib 2

172
Q

Describe the conduction system of the heart.

A

Composed of series of specialized cardiac muscle cells that carry impulses throughout the heart muscle signaling heart chambers to close in proper sequence

173
Q

What are the 6 components of the heart conduction system?

A
  1. Sinoatrial node (SA)2. Internode fibers3. AV node4. Atrioventricular bundle5. R and L bundle branches6. Subendocardial branches of Pujinke fibers
174
Q

What component of the heart conduction system is the pacemaker?

A

SA node

175
Q

Where is the SA node location?

A

RA wall, near SVC entry

176
Q

How do heart cells beat at baseline?

A

At their own rate (with ventricle cells at a lower rate than atrial cells)

177
Q

Describe the pathway of the heart conduction system.

A

Impulse signaling begins at SA node => impulses spread in a wave along cardiac muscle fibers of atria, signaling atria to contract => some impulses travel along the internodal pathway => AV node => impulse delay for fraction of a second => impulses pass through the AV bundle => impulses divide into R and L bundle branches => halfway through septum they become the subendocardial branches of Purjinke fibers => subendocardial branches approach heart apex and arc superiorly to ventricular walls => ventricular myocardial contraction begins at apex in endocardium and then epicardium

178
Q

Other name for AV bundle?

A

Bundle of His

179
Q

Other name for R and L bundle branches?

A

Crura

180
Q

Purpose of impulse delay at AV node?

A

Allows ventricles to fill completely

181
Q

Is the fibrous skeleton between atria and ventricle conducting? Implication?

A

NOPE, so only the impulses that follow the AV node can continue on the pathway

182
Q

What is a heart block? Treatment?

A

Damage to either the AV node or AV bundle causing the ventricles to beat slower than the atria Treatment: pacemaker

183
Q

What would cause the AV node to die?

A

Occlusion of the posterior interventricular artery

184
Q

How does an artificial pacemaker work?

A

2 leads:- One activates the pacemaker- One activates the AV node

185
Q

What does pulmonary edema indicate?

A

Mitral valve stenosis

186
Q

What is cardiopulmonary congestion? What is it a feature of? Symptom?

A

Blood fills up in the lungsFeature of left heart failureSymptom: trouble breathing, especially when they lay down and systemic hypoperfusion

187
Q

What can it mean when a patient intuitively grabs onto something to support them while standing?

A

Left heart failure

188
Q

Signs of right heart failure?

A

SYSTEMIC CONGESTION and PULMONARY HYPOPERFUSION: 1. Cyanotic patients = blue 2. Bilateral jugular vein distention 3. Enlarged liver4. Ascites 5. Pitting edema on legs, ankles, and feet

189
Q

Where does fluid go during systemic hyperperfusion?

A

Serosal cavities:1. Pleura = pleural effusion2. Pericardium = pericardial effusion3. Peritoneal cavity = ascites

G2 2017-2018 (45 decks)

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