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NU 300 Exam 5 Questions and Answers
100% Solved | Graded A+
perfusion - ✔✔supplying oxygen to body organs and tissues
oxygenation - ✔✔oxygen needed for cells to live and function properly
what is the coronary artery system's purpose? - ✔✔provides oxygenation
and perfusion to the heart muscle
what MAP is necessary to maintain blood flow? - ✔✔at least 60 for
coronary, between 60-70 for body organs
MAP formula - ✔✔(SBP + 2DBP)/3
systole - ✔✔contraction and emptying of A/V
diastole - ✔✔relaxation and filling of A/V
cardiac output - ✔✔amount of blood pumped from the LV each minute
(normal 3-6 L)
preload - ✔✔*VOLUME* of blood returning from venous and pulmonary
systems
afterload - ✔✔*RESISTANCE* the ventricles must overcome to eject blood
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contractility - ✔✔*FORCE* of contraction (independent of preload)
ejection fraction - ✔✔Vol% of LV ejected with each contraction
arterial system function - ✔✔delivers oxygen and nutrients
venous system function - ✔✔returns blood to right side of heart (delayed by
gravity), can accommodate large shifts in volume, prevent backflow
renin angiotensin-aldosterone system (RAAS) - ✔✔a hormone cascade
pathway that helps regulate blood pressure and blood volume,
INCREASES BP
nonmodifiable risk factors of CV disease - ✔✔age, male, ethnic origin (NA,
alaska natives^^), HX of CV disease, chronic illness (DM, renal and
pulmonary diseases)
modifiable risk factors of CV disease - ✔✔cigarettes, sedentary lifestyle,
obesity (BMI>30), highly competitive, overly concerned about deadlines,
hostile/angry, depression, stress, drug history, allergies, BC, living
situation, income, occupation, veteran
questions in CV assessment/ s/s finding concerning (pointing to CV
disease) - ✔✔pain, dyspnea, fatigue, palpitations, edema, syncope,
extremity pain, cyanosis, rubor, paresthesia, clubbing, HTN, orthostatic
hypotension, paradoxical BP, JVD, bruits
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normal cholesterol - ✔✔<200
normal triglycerides - ✔✔male 40-160
female 35-135
normal HDL - ✔✔male >45
female>55
normal LDL - ✔✔<130
normal INR - ✔✔0.8-1.1
normal PT - ✔✔11-12.5
normal PTT - ✔✔25-35
where do you listen for aortic valve? - ✔✔right sternum 2nd ICS
where do you listen for pulmonary valve? - ✔✔left sternum 2nd ICS
where do you listen for tricuspid valve? - ✔✔left sternum 5th ICS
where do you listen for mitral valve? - ✔✔left midclavicular 5th ICS
what does troponin lab value indicate? - ✔✔injury to myocardial muscle
what does myoglobin lab value indicate? - ✔✔earliest marker, not specific
to cardiac muscle
what are nursing interventions for a patient before a heart catheterization? -
✔✔clear liquids up to 2 hours prior, tests (CXR, CBC, coagulation study, 12
