Confirmation Of A's And I's Please
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For more on marking an answer as the "Best Answer", please visit our FAQ.This baffled me too. U will need to understand nervous impulses & depolarisation b4 attempting the heart cycle & ECGs as this is fundamentally what they r based upon. Simply put, action potentials r the movement of ions across membranes creating a difference in the charges on either side of the membrane, resulting in cell excitation. http://www.cvphysiology.com/Arrhythmias/A003.htm This site is a little heavy in places but the more u read, the better u'll understand.
Don't get 2 caught up in it, except 2 recall which ions r involved & in what phase, such as Na+, Ca2+ and K+. Knowing this will assist u when it comes 2 understanding the consequence of chemical imbalances and the indication of certain drugs.