PHCY 502_ Class 9_ Cardiovascular
System Part 3 - Arrhythmias Study
Set Exam
Cardiac ablation - Answer a procedure in which parts of heart tissue are scarred in
order to prevent abnormal electrical signals leading to arrhythmias
Dysrhythmia - Answer abnormal heart rhythm
Palpitation - Answer a noticeable strong, fast, or irregular heart beat, or noticing a
skipped heartbeat
Tachycardia - Answer an unusually fast heart rate (usually >100 BPM)
Conduction (cardiac) - Answer the process by which heat or electricity is directly
transmitted through a substance when there is a difference of electrical potential
between adjoining regions (e.g. atria and ventricles)
Depolarization - Answer cell potential becoming more positive, increasing the likelihood
of an action potential firing
Repolarization - Answer cell potential becoming more negative, decreasing the
likelihood of an action potential firing
Mural thrombus - Answer an organizing blood clot which forms in the walls of vessels or
endocardium of the heart
Action Potential - Answer a characteristic and rapid change in cell wall potential that
leads to propagation of cellular signaling
Asystole - Answer cessation of electrical and mechanical activity of the heart (no heart
beat)
Cardioversion - Answer a procedure in which electricity or medications are used to
convert a fast heart rate or other cardiac arrhythmia to normal sinus rhythm
Automaticity (cardiac) - Answer the property of cardiac cells to spontaneously and
autonomously fire action potentials
Defibrillation - Answer administration of a controlled electric shock to the heart to
restore a normal heart rhythm
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