Cardiac Lecture 6 Flashcards

1
Q

What percent of people have a PDA that branches off the RCA aka right coronary dominance?

A

75%

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

What percent of people have a PDA that branches off the LCA aka left coronary dominance?

A

15%

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

Is it a higher risk for the PDA to descend from the RCA or LCA?

A

LCA

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

Positive pressure ventilation would result in a _______ filling pressure and _______ CO

A

higher filling pressure- need more volume and/or venous constriction

Higher CO initially, but with prolonged positive pressure ventilation will result in lower CO

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

Aortic stenosis would result in what change to the heart walls? What is the downside?

A

hypertrophy, thick heart wall - harder to fill ventricles (reduced compliance) need to inc Psf to accommodate
- inc slope of phase I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Dilated cardiomyopathy (aortic valve regurgitation) would result in what change to the heart walls?

A

stretched out ventricle, thinner heart wall - high compliance, dec Psf
- dec slope of phase I

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

How are kid ventricles different from adults?

A

less compliant ventricle - can’t accommodate inc venous return so have to inc HR instead
- be careful with volume

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

What causes the first heart sound?

A

AV valves closing (ventricular pressure > atrial) vibration, systole

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

Which heart sound is the longest? What is the pitch?

A

1st (0.14 s) - low pitch

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

How long is the second heart sound? Pitch?

A

0.11 sec, higher pitch

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

What is the cause of the 2nd heart sound? What is unique about S2?

A

pulmonary and aortic valves closing, diastole
- can have splitting during deep inspiration and pulmonic valve stays open longer and closes after aortic valve

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

When is the 4th heart sound heard?

A

when the atrium is doing more work/fuller than normal (mitral stenosis) - unhealthy heart

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

When can the 3rd heart sound be heard?

A

kids and heart failure - low compliance ventricle; walls not stretching enough - turbulence

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

What heart sounds are expected in aortic stenosis?

A

loud murmur during systole

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

What heart sounds are expected in mitral stenosis?

A

murmur during diastole, loudest at the end (atrial contraction)

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

What heart sounds are expected in aortic regurgitation?

A

murmur during diastole - loudest in the beginning and dec

17
Q

What heart sounds are expected in mitral regurgitation?

A

backward flow during systole - systolic murmur loudest at the beginning

18
Q

Where can valves be auscultated?

A

aortic valve - R 2nd ICS
pulmonic valve - L 2nd ICS
tricuspid - L 5th ICS
bicuspid - lateral L 5th ICS

19
Q

What is the acronym for valve auscultation?

A

APTM - all physicians take money

20
Q

What instrument is used to identify heart murmur frequencies that are too low to hear?

A

Phonocardiogram

21
Q

How low can the ear hear?

22
Q

What are the divisions of the mediastinum?

A

Superior
Inferior:
- Anterior
- Middle
- Posterior

23
Q

What do the pericardiacophrenic nerves sense?

A

responsible for sensory perception in the pericardium and diaphragm

24
Q

What is included in the posterior mediastinum?

A

esophagus, thoracic aorta and ducts, vagus nerves, azygos and hemizygous veins

25
Q

What is included in the middle mediastinum?

A

heart, pericardium, ascending aorta, SVC, pulmonary trunk and veins, pericardiacophrenic and nerves, arteries and veins

26
Q

What is a good art line waveform called?

A

defined dicrotic notch

27
Q

A spring (bubble or clot) in the circuit of an art line would cause an _______-dampened waveform

A

over - can also be caused by the gain/amplifier not being turned up enough

28
Q

If the amplifier/gain is turned up too high in the circuit of an art line would cause an _______-dampened waveform

A

under - artifact

29
Q

A connection between the circumflex (LCA) and PDA (RCA) is called an ________

A

anastomosis

30
Q

Coronary blood vessels on the surface of the heart are ______, while the deeper vessels are called _______

A

epicardial - LAD and PDA
(sub)endocardial

31
Q

epicardial blood vessels have _____ pressure than endocardial blood vessels

32
Q

Which blood vessels in the heart are the most likely to have ischemia?

A

subendocardial, left ventricle - blood can move retrograde

33
Q

What could help reduce the amount of backward blood flow during mitral regurgitation?

A

reduce afterload

34
Q

A dilated left ventricle can also be called _________

A

eccentric LVH

35
Q

A hypertrophied left ventricle can also be called _________

A

concentric LVH

36
Q

What are the causes of eccentric LVH?

A
  • aortic/mitral valve regurg
  • ventricular septal defect
  • systolic dysfunction
37
Q

What are the causes of concentric LVH?

A
  • aortic valve stenosis
  • chronic HTN
  • diastolic dysfunction
38
Q

ACE inhibitors are given to

A

slow down scar tissue deposition in ischemic heart tissue

39
Q

Dead heart tissue resulting in nonfunctional muscle and systolic stretch would cause a decrease in ____