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Chapter 10
exploring Medical language 7th edition. Understand be Understood
104
Medical
Undergraduate 1
11/05/2010

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Term
tricuspid valve
Definition
located between the right atrium and right ventricle.
Term
mitral valve
Definition
located between the left atrium and left ventricle.
Term
semilunar valves
Definition
pulmonary and aortic valves located between the right ventricle and the pulmonary artery and between the left ventricle and the aorta.
Term
pericardium
Definition
two layer sac consisting of an external fibrous and an internal serous layer. The serous layer secretes a fluid that facilitates movement of the heart. This layer also covers the heart and is called the epicardium.
Term
epicardium (3 layers of the heart)
Definition
covers the heart
Term
myocardium (3 layers of the heart)
Definition
middle, thick muscle layer.
Term
endocardium (3 layers of the heart)
Definition
inner lining of the heart.
Term
blood vessels
Definition
tubelike structures that carry blood throughout the body
Term
arteries
Definition
blood vessels that carry blood away from the heart. All arteries, with the exception of the pulmonary artery, carry oxygen and other nutrients from the heart to the body cells. The pulmonary artery in contrast carries carbon dioxide and other waste products from the heart to the lungs.
Term
arterioles
Definition
smallest arteries
Term
aorta
Definition
largest artery in the body, originates at the left ventricle and descending through the thorax and abdomen.
Term
veins
Definition
carry blood back to the heart. All veins (except pulmonary) carry blood containing carbon dioxide and other waste products. Pulmonary veins carry oxygenated blood from the lungs to the heart.
Term
venules
Definition
smallest veins
Term
venae cavae
Definition
largest veins in the body . Inferior venae cava carries blood to the heart from parts below the diaphragm. Superior vena cava returns the blood to the hear from the upper part of the blood.
Term
capillaries
Definition
microscopic blood vessels that connect arterioles with cenules. Materials are passed between the blood and tissue through the capillary walls.
Term
blood
Definition
composed of plasma and formed elements, such as erythrocytes, leukocytes and thrombocytes.
Term
plasma
Definition
clear, straw colored liquid portion of blood in which cells are suspended. Plasma is 90% water and comprises approx. 55% of the total blood volume
Term
erythrocytes (cells)
Definition
red blood cells that carry oxygen. These cells develop in bone marrow.
Term
leukocytes
Definition
white blood cells that combat infection and respond to inflammation. There are 5 types of white blood cells.
Term
platelets
Definition
one of the formed elements in the blood that is responsible for aiding in the clotting process.
Term
serum
Definition
clear, watery fluid portion of the blood that remains after a clot has formed.
Term
lymph
Definition
transparent, colorless, tissue gluid that on entering that lymphatic system is called lymph. Flows to the heart (similar to blood plasma)
Term
lymphatic vessels
Definition
similar to veins, lymphatic vessels transport lymph from body tissues to the chest, where it enters the cardiovascular system. The vessels begin as capillaries spread throughout the body then merge into larger tubes that eventually become ducts in the chest. Provide a one way flow for lymph gathered from the tissues to ducts in the chest, where lymph enters through veins into the circulatory system.
Term
lymph nodes
Definition
small, spherical bodies composed of lymphoid tissue. May be singular or grouped together along the path of the lymph vessels. Nodes filter lymph to keep substances such as bacteria and other foreign agents from entering the blood. They also produce lymphocytes.
Term
spleen
Definition
located in the left side of the abdominal cavity between the stomach and the diaphragm. In adulthood, the spleen is the largest lymphatic organ in the body. Blood rather than lymph flows through the spleen. Blood is cleansed of microorganisms in the spleen. Spleen stores blood and destroys worn out red blood cells.
Term
thymus gland
Definition
one of the primary lymphatic organs, it is located anterior to the ascending aorta and posterior to the sternum between the lungs. It plays an important role in the development of the body's immune system, particularly from infancy to puberty. Around puberty the thymus gland atrophies so that most of the gland is connective tissue.
Term
angi/o
Definition
vessel
Term
aort/o
Definition
aorta
Term
arteri/o
Definition
artery
Term
atri/o
Definition
atrium
Term
cardi/o
Definition
heart
Term
lymphaden/o
Definition
lymph/node
Term
lymph/o
Definition
lymph, lymph tissue
Term
myel/o
Definition
bone marrow
Term
phleb/o, ven/o
Definition
vein
Term
ather/o
Definition
yellowish, fatty plaque
Term
ather/o
Definition
yellowish, fatty plaque
Term
eth/o
Definition
sound
Term
electr/o
Definition
electricity, electrical activity
Term
isch/o
Definition
deficiency, blockage
Term
therm/o
Definition
heat
Term
thromb/o
Definition
clot
Term
ac
Definition
pertaining to
Term
apheresis
Definition
removal
Term
graph
Definition
instrument used to record, record
Term
odynia
Definition
pain
Term
penia
Definition
abnormal reduction in number
Term
poiesis
Definition
formation
Term
sclerosis
Definition
hardening
Term
acute coronary syndrome
Definition
sudden symptoms of insufficient blood supply to the heart indicating unstable angina or acute myocardial infarction.
Term
aneurysm
Definition
ballooning of a weakened portion of an arterial wall
Term
angina pectoris
Definition
chest pain, which may radiate to the left arm, jaw that occurs when there is an insufficint supply of blood to the heart muscle.
Term
arrhythmia
Definition
any disturbance or abnormality in the heart's normal rhythmic pattern
Term
atrial fibrillation
Definition
a cardiac arrhythmia characterized by chaotic, rapid electrical impulses in the atria. The atria quiver instead of contracting, causing irregular ventricular response and the ejection of a reduced amount of blood. The blood that remains in the atria becomes static, increasing the risk of clot formation, which may lead to a stroke. Two types of AFib, are paroxysmal atrial fibrillation (PAF) which is intermittent, and chronic atrial fibrillation, which is sustained.
Term
cardiac tamponade
Definition
acute compression of the heart caused by fluid accumulation in the pericardinal cavity.
Term
coarctation of the aorta
Definition
congenital cardiac condition characterized by a narrowing of the aorta.
Term
congenital heart disease
Definition
heart abnormality present at birth.
Term
congestive heart failure
Definition
inability of the heart to pump enough blood through the body to supply the tissues and organs with nutrients and oxygen.
Term
coronary artery disease
Definition
a condition that reduces the flow of blood through the coronary arteries to the myocardium, denying the myocardinal tissue of sufficient oxygen and nutrients to function fully, most often caused by coronary atherosclerosis.
Term
coronary occlusion
Definition
obstruction of an artery of the heart, usually from atherosclerosis. Coronary occlusion can lead to acute myocardinal infarction.
Term
deep vein thrombosis
Definition
condition of thrombus in a deep vein of the body. Most often occurs in the lower extremities. A clot can break off and travel to the lungs, causing a pulmonary embolism.
Term
hypertension heart disease
Definition
disorder of the heart brought about by persistent high blood pressure.
Term
intermittent claudication
Definition
pain and discomfort in calf muscles while walking, a condition seen in occlusive artery disease
Term
mitral valve stenosis
Definition
a narrowing of a mitral valve from scarring, usually caused by episodes of rheumatic fever.
Term
myocardinal infarction
Definition
death (necrosis) of a portion of the myocardium caused by lack of oxygen resulting from an interrupted blood supply (heart attack)
Term
peripheral arterial disease
Definition
disease of the arteries, other than those of the heart and brain, that affects blood circulation, such as atherosclerosis and Raynaud disease. The most common symptom of peripheral atherosclerosis is intermittent claudication.
Term
rheumatic heart disease
Definition
damage to the heart muscle or heart valves caused by one or more episodes of rheumatic fever.
Term
varicose veins
Definition
distended or tortuous veins usually found in the lower extremities.
Term
anemia
Definition
reduction in the amount of hemoglobin in the red blood cells. Anemia may be caused by blood loss or decrease in the production or increase in the destruction of red blood cells.
Term
embolus
Definition
blood clot or foreign material such as air or fat, that enters the blood stream and moves until it lodges at another point in the circulation.
Term
hemophilia
Definition
inherited bleeding disease most commonly caused by a deficiency of the coagulation factor VIII.
Term
leukemia
Definition
malignant disease characterized by excessive increase in abnormal white blood cells formed in the bone marrow.
Term
Hodgkin disease
Definition
malignant disorder of the lymphatic tissue characterized by progressive enlargement of the lymph nodes, usually beginning in the cervical nodes.
Term
infectious mononucleosis
Definition
acute infection cause by epstein barr virus characterized by swollen lymph nodes, sore throat, fatigue and fever. The disease affects most young people and is usually transmitted by saliva.
Term
aneurysmectomy
Definition
surgical excision of an aneurysm
Term
atrial fibrillation ablation
Definition
a procedure in which abnormal cells that trigger atrial fibrillation are destroyed by using radiofrquency energy.
Term
cardiac pacemaker
Definition
battery powered apparatus implanted under the skin with leads placed on the heart or in the chamber of the heart.
Term
coronary artery bypass graft
Definition
surgical technique to bring a new blood supply to heart muscle by detouring around blocked arteries.
Term
coronary stent
Definition
a supportive scaffold device implanted in the coronary artery, used to prevent closure of the artery after angioplasty or atherectomy.
Term
embolectomy
Definition
surigcal removal of an embolus or clot (usually with a balloon catheter)
Term
femoropopilteal bypass
Definition
surgery to establish an alternate route from femoral artery to popliteal artery to bypass an obstruction.
Term
implantable cardiac defibillator
Definition
a device implanted in the body that continuously monitors the heart rhythm. If life threatening arrhythmias occur, the device delivers an electric shock to convert the arrhythmia back to normal rhythm.
Term
intracoronary thrombolytic therapy
Definition
an injection of an intravenous medication to dissolve blood clots in coronary blood vessels.
Term
percutaneous transluminal coronary angioplasty
Definition
procedure in which a balloon is passed through a blood vessel into a coronary artery to the area where plaque is formed. Inflation of the balloon compresses the plaque against the vessel wall, expanding the inner diameterof the blood vessels, which allows the blood to circulate more freely. (balloon angioplasty)
Term
bone marrow aspiration
Definition
a syringe is used to aspirate a sample of the liquid portion of the bone marrow, usually from ilium, for study, used to diagnose, stage and monitor disease and condition of the blood cells.
Term
bone marrow biopsy
Definition
a needle puncture to obtain a sample of bone marrow, usually from the ilium, for study, used to diagnose, stage and monitor disease and condition of the blood cells.
Term
bone marrow transplant
Definition
infusion of normal bone marrow cells from a donor with matching cells and tissue to recipient with a certain type of leukemia or anemia.
Term
digital subtraction angiography
Definition
process of digital radiographic imaging of the blood vessels that subtracts or removes structures not being sudied.
Term
Doppler ultrasound
Definition
a study that uses sound for detection of blood flow within the vessels, used to assess intermittent claudication, deep vein thrombosis, and other blood flow abnormalities.
Term
single photon emission computed tomography
Definition
a nuclear medicine scan that visualizes the heart from several different angles. A tracer substance such as sestamibi or thallium is injected intravenously. The SPECT scanner creates images from the tracer absorbed by the body tissues. Used to assess damage to cardiac tissue.
Term
thalium test
Definition
a nuclear med test used to diagnose coronary artery disease and assess recascularization after coronary artery bypass surgery. Thallium (radioactive isotope) is injected into the body intravenously a radiation detector is placed over the heart and images are recorded.
Term
transesophageal echocardiogram
Definition
an ultrasound test that examines cardiaac function and structure by using an ultrasound probe placed in the esophagus, which provides views of the heart structures.
Term
hypercholesterolemia
Definition
excessive amounts of fats in the blood
Term
hyperlipidemia
Definition
excessive amounts of fats in the blood.
Term
hypertriglyceridemia
Definition
excessive amount of triglycerides in the blood; associated with an increased risk of cardiovascular disease.
Term
lipids
Definition
fats and fatlike substances that serve as a source of fuel in the body and are an important constituent of cell structure.
Term
lumen
Definition
space within a tubular part or organ, such as the space within a blood vessel.
Term
occlude
Definition
to close tightly to block
Term
systole
Definition
phase in the cardiac cycle in which the ventricles contract numer of a blood pressure reading
Term
vasoconstrictor
Definition
agent or nerve that enlares the blood vessels
Term
vasodilator
Definition
agent or nerve that enlarges the blood vessels.
Term
venipuncture
Definition
puncture of a vein to remove blood, instill a medication or start an intravenous infusion.
Term
dyscrasia
Definition
abnormal or pathologic condition of the blood
Term
phagocytosis
Definition
a process in which some of the white blood cells destroy the invading microorganism and old cells.
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