Final Vocab Flashcards
conduction system
coordinates the contractions of the atria and ventricles
myocardium
muscular tissue of the heart
ischemia
insufficient blood supply
autothythmicity
property of conduction tissue that enables the heart to initiate its own electrical stimulation
pulmonary edema
when fluid accumulates in the blood
arteriosclerosis
aging disease where there is a hardening and narrowing of the arteries
atheriosclerosis
type of arteriosclerosis where fatty deposits accumulate within the walls of the arteries
angina pectoris
clinical condition characterized by chest pain caused by insufficient coronary blood flow
myocardial infarction
occurs when an area of heart muscle is deprived of blood flow
congestion
the accumulation of blood in the heart, lungs and tissues
chronic heart failure (CHF)
a failure or the heart to adequately pump enough blood to supply the tissues and organs with oxygen and other nutrients
preload
the amount of blood returning to the heart
afterload
the force of ventricular contraction that the heart must generate in order to overcome vascular resistance and eject blood out of the left ventricle
thiazide diuretics
block the reabsorption of sodium in the distal tubules of the kidney nephrons
loop diuretics
organic acids; site of action is the thick ascending limb of the loop of Henle in the kidney nephrons; most potent
aldosterone antagonists
weak diuretics that act on the collecting ducts of the nephron
bradykinin
endogenous vasodilator
anuria
kidneys have stopped making urine
edema
accumulation of fluid in other tissues
nephritis
infection or inflammation in the renal tissues, which reduces renal function
oliguria
decreased urine volume
uremia
an accumulation of nitrogenous waste products in the blood due to impaired renal filtration
antidiuretic hormone
substance that regulates water balance in the body by controlling water loss in the urine
vaptans
drugs that remove water through interactions with vasopressin (ADH) receptors
conivaptan
ADH receptor antagonist that conserves sodium and water
hypertension
blood pressure (BP) in the arterial system is abnormally high
secondary hypertension
hypertension with an unknown cause
renin inhibitors
drugs that reduce the activity of angiotensin II and RAA activation
ACE inhibitors
block the enzymatic conversion of angiotensin I to angiotensin II, decrease the release of aldosterone and ADH; can cause hypotension and tachycardia
ARBs
block the binding of angiotensin II to the angiotensin-1 receptor
malignant hypertension
BP is extremely high and there is vascular inflammation and necrosis of blood vessels
thromboembolism
clots that become jammed in blood vessels
coagulation
process of normal blood clot formation
hemostasis
the balance between clot formation and clot breakdown that occurs throughout the day
thrombophlebitis
inflammation of the walls of the veins
fibrinolytic drugs
dissolve preformed blood clots
hypolipidemic/antilipemic drugs
drugs that lower fats
plaque
accumulated fat
stable plaque
has a cholesterol core with a fibrous cap and may contain calcium that hardens as it builds up within the cell
unstable plaque
has a cholesterol core but is more dangerous because it had a thin cap that can erode, rupture, and break away; this can form a clot
coronary artery disease (CAD)
narrowing of small arteries that supply blood and oxygen to the heart
transient ischemic attach
a brief interruption of blood flow to the brain
aneurysm
abnormal widening of a portion of an artery due to weakness in the wall of the blood vessel
peripheral artery disease (PAD)
obstruction of blood flow in the large arteries of the arms and legs
low-density lipoprotein
“bad cholesterol;” formed from apoprotein B-100 and cholesterol
very-low-density lipoprotein
precursor to LDL
high-density lipoprotein
good cholesterol
triglycerides
main form of fat from diet; provide your body with energy
chylomicrons
very large lipoproteins produced by the intestine to transport dietary cholesterol and triglycerides
primary hyperlipidemias
significant elevations in lipid levels that occur as a result of genetic disorders
secondary hyperlipidemias
significant elevations in lipid levels that occur as a result of diet, drugs or disease
bile acid sequestrants
break down fats ingested in the diet into absorbable forms
HMG-CoA enzyme inhibitors
treatment of primary hyperlipidemias and to slow the progression of atherosclerosis
rhabdomyolysis
the rapid breakdown of skeletal muscles due to muscle injury