30 RHF Flashcards

1
Q

compare the stroke volume of the RV to the LV

compare the EF of the RV and LV

A

stroke volumes are the same

RV has a lower EF

RV starts with a larger volume so it can produce the same SV as the LV with a lower EF

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2
Q

why does the right ventricle have trouble with increases in pressure and volume

A

the right ventricle is relatively thin

Wall tension = pressure*radius/(2*wall thickness)

the less thick a wall is, the more senstitive it is to pressure/volume(radius) changes

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3
Q

what type of MI causes RV ischemia

which leads are going to have abnormalities?

A

inferior MI

aVF, II, III are the inferior leads

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4
Q

for inferior MIs causing RV failure, how is the patient managed

A

manage hypotension with fluids(only way to keep SV up)

add inotropes if fluids dont improve SV

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5
Q

describe management of acute RV failure NOT involving an inferior MI(different strategy)

A

diuretics are useful to prevent excessive filling of the RV and a detrimental effect on SV

inotropes(mirenon/dobutamine) can be used to maintain SV along with diuretics

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6
Q

symptoms of chronic RV failure

A

dsypnea, fatigue, lethargy

exertional syncope

anorexia

abdominal swelling, edema

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7
Q

cor pulmonale

A

subgroup of RV failure w/lung disease

  • COPD, interstitial lung disease, etc

hypoxemia leads to constriction of vessels in that part of the lung(body wants to shunt it to a better ventilated area); however if the whole lung is diseased, this just makes a lot of HTN for the RV to push against

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8
Q

most common cause of RV failure

A

LV failure!

in LV failure, RV failure is a sign that things are BAAAAD

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