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PHCY 502_ Class 9_ Cardiovascular System
Part 3 – Arrhythmias Study Guide.
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
Bradycardia - answer✔an abnormally slow heart rate (usually <60 BPM)
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
PHCY 502_ Class 9_ Cardiovascular System
Part 3 – Arrhythmias Study Guide.
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
Bradycardia - answer✔an abnormally slow heart rate (usually <60 BPM)
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
