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Exam 3 - Oxygenation, Breast & Lymph Assessment - CACC Nur 112 Questions And Answers
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Exam 3 - Oxygenation, Breast & Lymph Assessment - CACC Nur 112 Questions And Answers
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Exam 3 - Oxygenation, Breast & LymphAssessment - CACC Nur 112 Questions
And Answers
What is stroke volume? - correct answer ✅the volume (amount) of
oxygenated blood ejected from the left ventricle during systole.
(typically about 50-75 mL per contraction)
What could cause a decrease in stroke volume? - correct answer
✅hemorrhage and dehydration
What is cardiac output? - correct answer ✅the amount of blood
pumped by the left ventricle in one minute (typically 4-8 L)
can be determined by using the formula: stroke volume x heart rate.
What is preload? - correct answer ✅The volume of blood left in the left
ventricle at end of each contraction (diastole)
What is afterload? - correct answer ✅The resistance the left ventricle
must overcome to circulate blood.
What is afterload affected by? - correct answer ✅(1) Aortic impedance
(any obstruction in aortic to blood flow)
(2) Blood Viscosity (thickness)
(3) Blood volume
(4) Vascular tone (vessels dilated or constricted?)
,Exam 3 - Oxygenation, Breast & Lymph
Assessment - CACC Nur 112 Questions
And Answers
What is myocardial contractility? What can this affect? - correct answer
✅The ability of the heart muscle to contract and squeeze blood from
the ventricles.
Affects stroke volume and cardiac output.
What is Starling's Law? - correct answer ✅Stretching of heart muscle
(myocardium) causes increased force of contraction (e.g., more blood
going to heart -> heart pumps harder)
In heart failure- this mechanism doesn't work (more blood coming in,
but heart doesn't pump harder)
What is cardiomyopathy? - correct answer ✅disease of the heart
muscle
What is the conduction system? - correct answer ✅It generates and
transmits impulses needed for normal heartbeat.
(The electrical system of the heart)
How does the autonomic nervous system influence the conduction
system? - correct answer ✅It influences the rate of impulse generation
, Exam 3 - Oxygenation, Breast & Lymph
Assessment - CACC Nur 112 Questions
And Answers
and the speed of transmission through the conductive pathway. It also
influences the strength of the atrial and ventricular contractions.
Describe the path of the conductive system - correct answer ✅The
electrical impulse begins in the SA nose (aka the pacemaker) and travels
through the left and right atria, making them contract and expel their
blood volume (BV) into the ventricles. Then the electrical impulse goes
through the "bundle of his" and to the bundle branches that are
throughout the left and right ventricle. This causes the ventricles to
contract and expel their BV out into general circulation.
Define electrocardiogram (EKG/ECG) What does it monitor? - correct
answer ✅It is a measurement of the electrical activity in the heart's
conductive system.
It monitors the regularity and path of the electrical impulse through the
conduction system.
Define normal sinus rhythm - correct answer ✅ECG that is within
normal limits (ensures that impulse begins at SA node and follows as
normal)
what is an alteration in the heart's conductive system called? - correct
answer ✅dysrhythmia
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