test 2 Flashcards
main function of heart
pump blood
function of lungs
oxygenate
circulation
movement of blood thru heart thru blood vessels. heart pumps and pushes thru body
perfusion
continuous supply of blood flow thru capillaries bed delivering nutrients nutrients and oxygen in body. it also picks up waste such as CO2 and brings it back to body
only oxygenated vein
pulmonary vein
only deoxygenated artery
pulmonary artery
blood flow thru heart
vena cava- right atrium-tricuspid- right ventricle- pulmonary valve- pulmonary artery- lungs- pulmonary veins- left atrium- bicuspid valve- left ventricle- aorta valve- aorta
base
top of heart
apex
bottom of heart. strongest muscle. pushes blood out
capillaries
let o2 out and take co2 in. let nutrients out and bring in waste
A fib
atria not creating good beat. bad circulation
pericardium
2 layers with serous fluid. membrane encloses heart. shields against infection
pericardial fluid
keeps heart from rubbing against pericardium. causes pain
pericardium fluid
shock absorber
too much pericardium fluid
Cardiac temponade
electrolytes involved in heart beating effectively, if thrown off, imbalance occurs
magnesium, calcium, potassium
myocardium
strong heart muscle. never rests
epicardium
outer smooth membrane that lays on top
endocardium
inner lining of heart
widow maker
left descending artery. main artery for heart. if blocked, results in MI that typically goes undetected
connects capillaries
veinus and arterial system
risk factor for blockage
high cholesterol
coronary circulation
oxygenates heart itself
cardiopulmonary circulation
circulation that occurs between the heart and lungs
congestion on right side
edema. backup in body
backup on left side
goes into lungs causing abnormal sounds, congestion, SOB, inability to breathe, dyspnea, low pulse ox
thrombus
clot
embolus
moving clot
SA node
where conduction starts
called pacemaker
avg HR 60-100 beats
AV node
if conduction doesn’t start in SA, It comes here
HR 40-60 beats/ min
what happens if AV node is diseased
man made structure put in
auto meticity
spontaneous rthym where atrias beat then ventricles beat
conduction order
SA node- AV node- bundle branch- splits and goes to both ventricles- purkinge fibers (causes ventricular beat)
controls heart rate and contracting
autonomic nervous system
if we need faster heart rate, stronger, more oxygen, or more blood flow
ANS sympathetic
slows heart rate back down with vagus nerve
parasympathetic
baroreceptors
detect pressure changes in aortic arch, and carotid artery. could cause increase or decrease in HR
Chemoreceptor
detect change in blood pH, such as o2 levels and co2 levels
can also increase/decrease HR
dilates or contracts vessels
what does stress cause to be released increasing HR, causing vasoconstriction, blood clots capillary issues
catecholamines
factors influencing cardiovascular function
developmental stage, environment, lifestyle, medications, pathophysiological conditions
baby aspirin can be prescribed for
preventing strokes and heart attacks
heart failure
ineffective pump
cardiomyopathy
heart is enlarged. cant work properly. irreversible
cardiac ischemia
not enough oxygen . can lead to necrosis, crushing pain (agina pectoris). wont lead to death but can cause other problems
coronary artery disease
buildup of plaque. can decrease blood flow. narrowing leads to high HR
CAD sound in carotid artery (neck)
bruit
dysrhythmias
any alteration in HR or rthym. could lead to MI or cause clots
heart valve stenosis
valve narrows. possible murmurs and extra sounds
peripheral vascular disease
inadequate blood flow. some places can appear pale. hair loss can occur
venous peripheral vascular disease
blood cant flow back
edema, skin is brownish, stashish ulcers
orthostatic hypertension
blood pressure drops from lying to standing
arrthymia
no heart beat
labs for cardio assessment
cholesterol, lipid panels, electrolytes, CRP- inflammation
diagnostic test that looks at valves
TEE
5 lead EKG color order
right top- white
right bottom- green
left top- black
left bottom- red
middle- brown
P wave
SA node
QRS complex
depolarization of ventricle
T wave
ventricle at rest
U wave
only shown if injury
Examples of cardio nursing diagnosis
decreased cardiac output, ineffective tissue perfusion, anxiety, fatigue, activity intolerance
cardio physiological needs
CVA, fatigue, fluid overload, tissue perfusion, cardiac output
cardia safety needs
pain, risk for falls
cardiac interventions
Promote circulation/ Prevent clots
Elevate legs
Ambulate
Range of Motion exercises
TED hose
SCDs
Manage anxiety
Stay calm
Provide clear and precise instructions
medications
dialate blood vessels, increase cardiac output. decrease work load of heart
vasodialators
block epinephrine and norepinephrine. can be used for dysrthymias
beta blockers
block calcium. decrease bp and hr
calcium channel blockers
increase pumping action
intropics
reduces sodium. more urination. some pull K+
diuretics