Class 6: Cardiovascular Disease Flashcards
(34 cards)
Bradycardia
less than 60
tachycardia
higher than 100
hypertension
high elevated bp that is prolonged 140/90
essential hypertension
elevated bp with no other cause
secondary hypertension
caused by another disease or medical condition
coronary artery disease
build up of plaque in the artery (become hardened and narrowed)
ischemia
inadequate blood supply to an organ
edema
swelling from injury. small blood vessels leak to tissues
plaque
made up of fat, cholesterol, calcium and others in blood
vasodilation
dilation of blood vessels, decrease BP
vasoconstriction
constriction of blood vessels, increase BP
cardiovascular disease
a group of disorders of the heart and blood vessels
- coronary heart disease
- cerebrovascular disease
- peripheral arterial disease
- rheumatic heart disease
- congenital heart disease
- deep vein thrombosis and pulmonary embolism
isolated systolic hypertension
pulse pressure increases
- mild to moderate elevated systolic BP
- normal or subnormal diastolic BP
- occurs primarily in older adults
- aorta and major arteries lose flexibility with age
- heart pumps harder to get blood through
- diastolic stays normal because no system vasoconstriction
secondary hypertension
results from known diseases
- chronic kidney disease
- endocrine gland dysfunction
- pituitary or adrenal tumour
- hyperactive thyroid gland
- in most cases, successful treatment of underlying conditions cures the hypertension
primary (essential) hypertension
- 90-95% of all hypertension cases
- no direct known cause
- many risk factors
- affects the heart, blood vessels and kidneys
cardiac output
stoke volume (amount of blood pumped out of the left ventricle per beat) x heart beats per minute
systemic vascular resistance
force opposing the movement of blood within the blood vessels.
-mechanisms that regulate bp affect cardiac output or systemic vascular resistance
barorecptors
found in carotid arteries. they vasodilator to lower blood pressure by stimulating sympathetic receptors
renin-angiotensin-aldosterone system
cause vasoconstriction in response to low bp
antidiuretic hormone
affects blood volume and high bp
aldosterone
released by adrenal cortex. stimulates kidneys to realize water. increase bp
epinephrine
increase bp, released in blood stream
prevention of hypertension
- decrease fat, sodium, alcohol, stress
- no smoking
- increase physical activity
- manage diabetes
- manage healthy weight
treatment of hypertension
-lifestyle modifications and medication