Cardiopulmonary review Flashcards
network of progressively smaller vessels that carry oxygenated blood to the myocardium
coronary arteries
valve between Right atria and Right ventricle
tricuspid
valve between Left atria and Left ventricle
mitral (bicuspid)
valve between Left ventricle and aorta
aortic
valve between Right ventricle and pulmonary artery
pulmonary valve
vein that returns blood from lower body and viscera to Right atrium
inferior vena cava
veins that carry oxygenated blood from Right and Left lungs to Left atrium
pulmonary veins
vein that returns venous blood from head, neck, arms to Right atrium
superior vena cava
arteries that carry deoxygenated blood from Right ventricle to Left and Right lungs
pulmonary arteries
lowest part of heart formed by inferolateral part of Left ventricle; at level of 5th intercostal space
apex
upper border of heart involving Left atrium, part of Right atrium, parts of great vessels; at level of 2nd intercostal space
base
thick contractile middle layer of muscle cells; forms bulk of heart wall
myocardium
double-walled connective tissue sac that surrounds outside of heart and great vessels
pericardium
body’ largest artery; arch, thoracic, abdominal
aorta
valve function
maintain unidirectional blood flow
normal pacemaker of heart
SA node
innervation to heart
vagus (parasympathetic), sympathetic nerves
sympathetic effects on heart
Name the neurotransmitters
increased rate, increased force of contraction
epinephrine and norepinephrine
parasympathetic influence on heart (via vagus nerve)
Name the neurotransmitter
slow HR-through influence on SA node
acetylcholine
closure of mitral and tricuspid valves
S1 (lub)
closure of aortic and pulmonary valves (dub)
S2
normal in healthy young children; abnormal in adults (may be associated with heart failure)
AKA?
S3
ventricular gallop
4th heart sound: may be associated with HTN, stenosis, hypertensive heart disease or MI
AKA?
S4
atrial gallop
at least 140 mmHg SBP OR at least 90 mmHg DBP
Stage 2 hypertension
130-139 mmHg SBP OR at least 80-89 mmHg DBP
Stage 1 hypertension
120-129 mmHg SBP AND <80 mmHg DBP
elevated BP
<120 mmHg SBP AND <80 mm Hg DBP
Normal BP
greater than 180 mmHg SBP and/or greater than 120 mmHg DBP
Hypertensive crisis
refers to tension in ventricular wall at end of diastole; reflects venous filling pressure that fills left ventricle during diastole
preload
refers to forces that impede flow of blood out of heart- primarily the pressure in the peripheral vasculature, compliance of the aorta, and mass and viscosity of blood
afterload
atrial systole
contraction of right and left atria pushing blood into ventricles
atrial diastole
period between atrial contractions when atria are repolarizing
ventricular systole
contraction of right and left ventricles pushing blood into pulmonary arteries and aorta
ventricular diastole
period between ventricular contractions when ventricles are repolarizing
stroke volume
refers to volume of blood ejected by each contraction of left ventricle; normal ranges from 60-80 ml–depends on age, sex, activity
cardiac output
amount of blood pumped from left or right ventricle per minute; equal to product of stroke volume and heart rate.
normal CO for adult male at rest=4.5-5.0 L/min (your text has slightly wider range), women slightly less
Can increase to 25 L/min during exercise
amount of blood that returns to Right atrium per minute
CV is closed loop, so this amount returning must equal CO when averaged over time
venous return
reflexes by which BP is maintained; these detect changes in pressure
baroreceptor
forced expiration against a closed glottis; sets off reflexes
Valsalva
moderate, bothersome angina
2 on anginal pain scale