ABSITE 16 Critical Care Exam Questions And 100% Correct Answers

ABSITE 16 Critical Care Exam Questions And
100% Correct Answers


cardiac output normal value

4-8

cardiac index normal value

2.5-4 L/min/m2



systemic vascular resistance normal value

700 - 1600 dynes/sec/cm-5

pulmonary capillary wedge pressure normal value

4-12 mmHg

Pulmonary Vascular Resistance (PVR)

20-130 dynes/s/cm-5

central venous pressure normal value

5-9

pulmonary artery pressure normal value

25/10 (+/- 5)

mixed venous oxygen saturation normal value

70-80

MAP =

CO x SVR

CI =

CO/BSA

where does cardiac output go?

,renal = 25%

brain = 15%

heart = 5%

what is cardiac performance determined by (x4)

preload

afterload

contractility

HR

preload

-linearly related to left ventricular end-diastolic pressure and filling pressure

- wedge pressure measures preload




afterload

resistance against the ventricle contracting (SVR)




contractility

the force of contraction




stroke volume

- determined by LVEDV, contractility and afterload

, - LVEDV - LVESV




ejection fraction

stroke volume/LVEDV




EDV (end-diastolic volume)

-determined by preload and distensibility of the ventricle




ESV (end-systolic volume)

- determined by contractility and afterload




cardiac output increased with HR up to ___ but then starts to decrease because ___

- 120-150

- decreased diastolic filling time




How much LVEDV is accounted for by atrial kick

20%

anrep effect