GLOSSARY
A
ACE angiotensin-converting enzyme.
action potential voltage changes generated across the membrane
of a nerve or muscle cells when the cell is activated through
a variety of stimuli (electrical, chemical, or mechanical). acute coronary syndrome this syndrome defines patients with
acute chest pain caused by myocardial infarction or unstable
angina. adventitia the outer most lining of the vessel wall. afterload arterial impedance, restriction to blood flow delivered
from the left ventricle; force against which the myocardium
contracts in systole; a major determinant of wall stress. aggregation platelet clumping.
aldosterone a hormone produced by the adrenal glands. allograft a graft between animals of the same species, but of
different genotype. aneurysm a ballooning of the wall of an artery or the heart
caused by severe weakening of the walls of the artery or the
heart muscle. angina chest pain caused by temporary lack of blood to an area
of heart muscle cells, usually caused by severe obstruction
of the artery supplying blood to the segment of cells. angina pectoris short duration, recurrent chest pain or pressure
often accompanied by feelings of suffocation and impending
doom; most frequently associated with lack of blood and
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