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ECG & Dysrhythmias


Automaticity Ability to initiate an impulse spontaneously & continuously.
Excitability Ability to be electrically stimulated.
Conductivity Ability to transmit an impulse along a membrane in an orderly manner.
Contractility Ability to respond mechanically to an impulse.
Depolarization Reduction of a membrane potential to a less negative value. It is caused by the influx of cations, such NA & Ca, through ion channels in the membrane. In many neurons and muscle cells, Depolarization leads to an electris impulse caled an action potentia
Repolarization the re-establishment of polarity, especially The return of cell membrane potential to resting potential after depolarization.
Cardiac cycle Referring to all or any of the events related to the flow or blood pressure that occurs from the beginning of one heartbeat to the beginning of the next. http://en.wikipedia.org/wiki/Cardiac_cycle#Stages_of_the_cardiac_cycle
Sinus rhythm The normal beating of the heart, as measured by an electrocardiogram (ECG).
Created by: 100001804406692