Quiz 3 Concepts Flashcards
What is the pericardium and why is it double-walled>
it is a sac that surrounds and protects the heart
-it is double-walled to make it harder for things to hurt the heart
What is the myocardium?
the muscular wall of the heart, it is responsible for contraction of the heart
What is the endocardium?
the thin layer of endothelial tissue that lines the inner surface of the heart chambers
What is the flow of blood starting at the vena cava?
right atrium –> tricuspid valve–> right ventricle–> pulmonary valve–> pulmonary artery–>pulmonary vein–> left atrium–> mitral valve–> left ventricle–> aortic valve–> aorta
What does S2 indicate?
the closing of the semilunar valves (aortic and pulmonary valves)
-this is the end of systole
Where is S2 heard the loudest?
the base of the heart
What does S1 indicate?
the closing of the mitral and tricuspid valves
-heard the loudest at the apex
What occurs after the pacemaker is initiated?
the impulse travels to the atria to the AV node, it delays, and gives the atria time to contract
What gives information about the activity on the right side of the heart?
jugular veins, they reflect volume changes and filling pressures
With aging, what happens to the heart?
systolic pressure increase
no change in diastolic pressure
What occurs with paroxysmal nocturnal dyspnea?
it is shortness of breath that occurs at night, lying down increases blood volume and the weak heart can’t accomodate
How do you assess for significant risk factors of coronary artery disease?
assess serum cholesterol, elevated BP, blood glucose levels, diabetes, obesity,
What should auscultate if cardiovascular disease is suspected?
each carotid artery to listen for a bruit
How do you avoid compromising arterial blood to the brain?
palpate one carotid artery gently at a time, medially
How does heart failure affect the heart?
it decreases cardiac output and circulation becomes backed up bc the heart can’t pump it
What sound is associated with heart failure?
S3
Where is S4 heard and who does it occur in?
its heard at the end of diastole and ventricles resist filling, mainly occurs in older adults
How do you auscultate the carotid artery for bruits?
applying the bell of the stethoscope over the carotid artery at three levels
-the patient should breath, exhale, and briefly hold it
How does blood move through the veins?
contracting skeletal muscles to milk the blood toward the heart
pressure gradients
the valves
What would occur if skeletal muscle, valves, and lumen didn’t work?
venous stasis
What would occur if somebody stood or sat for a prolonged amount of time?
venous disease because they do not get the milking action that walking causes
What propels the flow of lymph?
contracting skeletal muscles
Where does lymph flow?
from the tissue spaces to the bloodstream
Where are the epitrochlear nodes located and what do they drain?
in the antecubital fossa and they drain the lower arm