NSG 4100 / NSG4100 EXAM 3. NURSING PRACTICE 3 ADULT HEALTH EXAM. QUESTIONS AND ANSWERS.

NSG 4100 EXAM 3
Systole
-when the heart contracts
-Depolarization




Diastole
when the heart Relaxes
-Repolarization




Stroke volume
the volume of blood pumped out by a ventricle with each contraction




Cardiac output
heart rate x stroke volume
-the volume of blood ejected from the left ventricle into the body per min

,Preload
amount of ventricular stretch at the end of diastole (relaxed)




Afterload
the amount of resistance the heart must overcome to open the aortic valve and push
the blood volume out into the systemic circulation




Central venous pressure
venous blood pressure within the right atrium that reflects the filling pressure of the
right ventricle
-Normal CVP: 2-6 mmHg




CVP greater than 6
elevated right ventricular preload (amount of blood in the right ventricle after
relaxation: Diastole)




What can cause an increased CVP?
Hypervolemia
SIADH
Kidney failure

, Right sided HF




What can cause a decreased CVP?
Hypovolemia
Dehydration
Blood loss
Vomiting
Diarrhea
Diuresis




Where does sinus tachycardia originate?
SA node




What can cause tachycardia?
fever
hemorrhage
hyperthyroidism
pain
hypotension
exercise