Depolarization of ventricles
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Why is your heart more complex than your circulatory
When there is no electrical activity in the heart (asystole), the AED won't start the heart as drugs are required to start the heart. The AED will only re-set the heart from abnormal electrical activity (such as V-Tach or V-Fib).
The brain does not send "electrical pulses" to the heart. Electrical impulses are actually generated within the heart itself (in the SA node), which travel through several intricate pathways from the atria down to the ventricles.
The His-Purkinje system is the part of the heart's electrical system that follows the outer walls of the ventricle.
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