HF still... 3 Flashcards Preview

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Flashcards in HF still... 3 Deck (10):
1

NT-proBNP

1. N termius breakdown product of BNP
2. inactive
3. t1/2 of 120 minutes

2

BNP half life

20 minutes

3

elevations of BNP are often due to

HF but can also be due to sepsis of PE

4

clinical, BNP is used to

rule out symptomatic HF

5

in patients with chronic HF, and elevated BNP is

less useful to determine if new dysnpea is from acutre HF decompensation or from some other process (COPD exacerbation)

6

what is more useful, negative or positive BNP?

negative because a low BNP make HF very unlikely as the cause of the symptoms

7

EKG in HF

1. no direct diagnosis of HF
2. infer possibility of HF from other findings, like
a. prior MI (q wave)
b. LVH (increased voltage)
c. diffuse conduction disease from fibrosis or myocardial damage (LBBB)
d. arrhythmia (AFib, ventricular ectopy)

8

EF =

end diastolic - ensystolic volume/ end diastolic volume

%

9

EF is a

gross measure of systolic function

10

examples of EF

1. Normal = (100 ml – 40 ml) / 100 ml = 60%
2. HFrEF = (200 ml – 150 ml) / 200 ml = 25%
3. Dilated AND reduced stroke volume