exam 3- presntations and videos Flashcards
(115 cards)
heart
what is it
how much moves
Hollow, cones shaped organ, necessary for life
Moves more then 1800 gallons of blood/day
pericardium
atria/ventricals
encases the heart and anchors it to surrounding structures-fits snuggly to prevent overflowing
Atria -top
Ventricles –bottom of heart
heart beat
systole
diastole
One heart beat = contraction and relaxation of heart—aka cardiac cycle
Systole contraction-ventircles are contracting/atria filling-5o ml of blood remaining
Diastole atria are contracting and ventricles are relaxing filling
stroke volume
how often
Stroke Volume: Difference between the end diastolic volume and the end systolic volume -
70—80 tomes a minute
cardiac output
what is
what indicator of
what happens if not pumping correctly
HR X Stroke Volume
Indicator of: amount of blood pumped into ventricles in one minute—how well heart is functioning as a pump-how well heart is working//
if not pumping correctly, cardiac output and tissue perfusion are decreased
ischemia
necrosis
I-depreivation of oxygen, body tissues do not get enough blood/
/N- one step further, tissues will start to die as a Result of not enough oxygen in blood
preload
frank starling mechaniism
Preload: new rubber band-stretch and release which will snap back into place and shape-overstretching will become relaxed and lose ability to recoil –overstretching cardiac muscle fibers eventually leads to ineffective contraction
Frank Starling Mechanism: -repeatedly stretch past a certain point it will eventually lose elasticity-cant snap back into oringal shape/size
compliance
afterload
Compliance: take a lot of force/work to inflate at first. As it stretches more often it becomes more complaint and expands easily with less force as time goes on
Afterload: force ventricles must overcome to eject blood volume
s/s of low potassium level
leg cramps
heart fluttering
Diagnostic Tests cardiac
Cardiac Cath - npo,allergies to iodine, assess aspirin, vs
CT Scan-iodine allergy, npc 4 hr
Echocardiogram
Electrocardiogram
Lipids -low fat meal then no food for 8-12 hrs
Dobutamine Stress Test -npo , discontinue beta blockers, ace
Treadmill Stress Test -comfortbael clothes, npo and no smoking
TEE-npo, vs
pt assessment cardiac
History—
Personal and family history
Diet history
Socioeconomic factors
Current health problems -perceived or actual
Functional history
risk factors for cardiac
Smoking
Obesity
Physical inactivity
age related changes cardiac
e/c
valves-cause
co/bp/contr
efficiency and contractiblity decreases-leads to decresaded ardiac output.
Valves become more thicker/ rigid causing increased BP.
Older adults have decreased cardiac output, INC blood pressure, Decreased contractility
Patient Physical Assessment
cardiac
what looking at
General appearance
Skin color/temperature
Extremities
Capillary refill
Edema
Blood pressure//Heart Rate
normal hr
school age
adult
athlete
Pediatric/School Aged 70-110
Adult 60-100
Athletes may have lower heart rate
heart failure
what kind of problem
results in what
cardiac output
Filling & pump/Contracting problem…
results in metabolic needs of the body are not met due to not enough blood being pumped—
cardiac output falls leading to decreased tissue perfusion and vascular congestion/Congestive heart failure
impaired myocardial function
most at risk for hf
causes of heart failure
coronary heart disease/MI-most risk
cardiomyopathy
rhematic fever
ineffective endocarditis
increase cardiac output
causes of heart failure
hypertension
2.Valve disorder
- anemia
- Congenital heart defects
acute noncardaic conditions
causes of heart failure
Volume overload
2.hyperthyroidim
- fever/infection
- Pulmonary emboli
Incidence, prevalence & Risk factors
incidence
prevelance
risk factors
life exp
risk for
Incidence and prevalence increase with age
Prevalence & Mortality: African Americans have higher risk
Risk factors: impaired myocardial function- mi, hypertension
Life expectancy: dependent on underlying cause, and how quickly its treatment
Risk for sudden cardiac death increased
systolic vs diabolic failure
manifestations
S-Weakness, fatigue, and decreased exercise tolerance.
D-Shortness of breath, tachypnea, and respiratory crackles
left sided heart failure
culprit
coronary heart disease and hypertension
when Left ventricle function fails
what falls
backwards effect
backs where
Cardiac output falls
Backward effects pressure in left ventricle/atrium increase which….
Backs up into the pulmonary system inc congestion and pressure
lef sided hf manifestations
fatigue/activity intolerance/dizziness
dyspnea,
SOB ,
cough,
orthopnea(SOB when laying flat),
congested lung sounds