Valvular heart disease Flashcards

1
Q

What are the four heart sounds?

A

S1
S2
S3
S4

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2
Q

What is the S1 heart sound?

A

closure of the mitral and tricuspid valve “lub”

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3
Q

What is the S2 heart sound?

A

closure of the aortic and pulmonic valve “dub”

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4
Q

What is the S3 heart sound?

A

suggests congestive heart failure

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5
Q

What is the S4 heart sound?

A

suggests poor ventricular compliance

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6
Q

Where should you listen for the aortic valve sounds?

A

right of sternal border at 2nd ICS

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7
Q

Where should you listen for the pulmonic valve sounds?

A

left of sternal border at 2nd ICS

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8
Q

Where should you listen for the mitral valve sounds?

A

left midclavicular line at 5th ICS

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9
Q

Where should you listen for the tricuspid valve sounds?

A

left of sternal border at 4th ICS

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10
Q

Which valvular diseases are associated with eccentric hypertrophy? (select 2)
a. mitral stenosis
b. mitral regurgitation
c. aortic stenosis
d. aortic regurgitation

A

b. mitral regurgitation
d. aortic regurgitation

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11
Q

The ____________________________ open to let blood flow from the atria to the ventricles

A

atrioventricular valves (mitral and tricuspid)

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12
Q

The ___________ open to let blood flow from the ventricles to the aorta and pulmonary artery respectively

A

semilunar valves (aortic and pulmonary)

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13
Q

Valvular stenosis is a ____________ to forward flow during systole

A

fixed obstruction

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14
Q

Stenosis results in

A

pressure overload–> concentric hypertrophy

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15
Q

Concentric hypertrophy means that the

A

sarcomeres are added in parallel

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16
Q

Valvular regurgitation occurs when the

A

valve is incompetent

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17
Q

Flow re-enters the chamber through the incompetent valve during

A

diastole

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18
Q

Regurgitation results in

A

volume overload–> eccentric hypertrophy

19
Q

Eccentric hypertrophy means that the

A

sarcomeres are added in series

20
Q

Which valves have chordae tendineae?

A

atrioventricular valves (mitral & tricuspid)

21
Q

Following aortic valve replacement for aortic stenosis, the left ventricular end-systolic volume will be:
a. increased due to afterload reduction
b. increased due to decreased transvalvular gradient
c. decreased due to a reduction in impedance to ventricular ejection
d. unchanged

A

c. decreased due to a reduction in impedance to ventricular ejection

22
Q

The smaller the aortic valve orifice, the more

A

pressure the ventricle must produce to eject its stroke volume

23
Q

Normal aortic valve orifice size is

A

2.5-2.5 cm2

24
Q

Severe aortic stenosis is

A

<0.8 cm2

25
Q

Etiologies of aortic stenosis include

A

a bicuspid aortic valve (most common)
rheumatic fever
infective endocarditis

26
Q

Compensatory mechanisms for aortic stenosis include

A

increased thickness of the LV wall
decreased compliance
smaller chamber radius

27
Q

The classic presentation of aortic stenosis includes

A

syncope
angina
dyspnea

28
Q

___________ should be avoided in the patient with severe aortic stenosis due to risk of CV collapse

A

spinal anesthesia

29
Q

In the patient with severe aortic stenosis, chest compressions during CPR are often

A

ineffective due to the high transvalvular pressure gradient required

30
Q

The arterial waveform of aortic stenosis may show

A

pulsus tardus and pulsus parvus

31
Q

Anesthetic goals for aortic stenosis for HR, heart rhythm, preload, afterload, contractility, and PVR.

A

Full, slow, constricted
heart rate–> avoid tachycardia
heart rhythm–> NSR (maintain atrial kick)
preload–> increase
afterload–> maintain or increase
contractility–> maintain
pulmonary vascular resistance–> normal

32
Q

A mean transvalvular pressure gradient (LV to aorta) of ________________- is also diagnostic for severe AS

A

> 40 mmHg

33
Q

______________ occurs in up to 90% of patients with severe aortic stenosis.

A

Acquired von Willebrand disease–> b/c the von Willebrand molecule is damaged when it passes through the stenotic valve

34
Q

What should be given if LV dysfunction occurs in the aortic stenosis patient?

A

inotropes to maintain contractility

35
Q

Aortic insufficiency leads to

A

volume overload & eccentric hypertrophy

36
Q

Aortic insufficiency can be an ______________ or ___________ problem

A

acute or chronic

37
Q

The arterial waveform of aortic insufficiency shows

A

an increased pulse pressure with bisferiens pulse (biphasic peaks)

38
Q

Before initiating cardiopulmonary bypass in the patient with aortic regurgitation,

A

cardioplegia must be injected retrograde (through the coronary sinus) or directly into each coronary ostia

39
Q

Anesthetic goals for aortic insufficiency for heart rate, heart rhythm, preload, afterload, contractility, and pulmonary vascular resistance are:

A

full, fast, and forward
heart rate–> elevate
heart rhythm–> NSR
preload–> maintain or increased
afterload–> decrease
contractility–> maintain
pulmonary vascular resistance–> maintain

40
Q

Acute aortic insufficiency leads to

A

rapid CV instability
left ventricular failure can result from acute dilation leading to increased wall tension and impaired contractility

41
Q

Acute AI is usually caused by

A

endocarditis
can also result from aortic root dissection from aneurysm or trauma

42
Q

Conditions associated with chronic AI include

A

valvular calcification
Marfan syndrome
Ehler-Danlos syndrome
ankylosing spondylitis

43
Q

Etiologies of aortic regurgitation include

A

incompetent valve or dilation of the aortic root or its supporting structures

44
Q

Conditions that increase the regurgitant volume include:

A
  1. bradycardia (longer diastolic filling time)
  2. increased SVR (increased aorta-LV pressure gradient)
  3. large valve orifice (larger area for the blood to return through)