Cardic Output And Circulation

Question 1

What are causes of inadequate LV filling that can lead to decreased CO?

Answer 1

Tachycardia, arrythmias, hypovolemia, valvular stenosis, constrictive pericarditis, tamponade, restrictive cardiomyopathies

Question 2

Causes of inadequate LV ejection that lead to a decrease in CO?

Answer 2

CAD with infarction
Myocarditis
HTN
Aortic stenosis
Mitral regurgitation
Negative inotropes
Metabolic disorders

Question 3

What are 3 ways to measure CO?

Answer 3

Arterial Pulse pressure (least invasive, measures SV on beat to beat basis)
TEE (minimally invasive)
ECHO

Question 4

What are a few non-invasive assessments that indicate adequacy of fluid resuscitation?

Answer 4

Pulse rate and quality, skin temp, cap refil, LOC, UO

Question 5

What is SVO2 and how does it relate to fluid resuscitation. What is the normal value?

Answer 5

65-75
Mixed venous oxygen-shows how well perfused venous is ensuring adequacy of CO

Question 6

How does blood lactate relate to adequacy of circulation?

Answer 6

Increases indicate tissue hypoxia

Question 7

MAP formula

Answer 7

(2 X DBP) + (SBP/3)