In reading EKG, or ECG, output lines, there are many different types of harmful systoles, meaing beating patterns of the heart. The four major deadly heart behaves that are identifiable on ECGs are atrial fibrilation, ventrical fibrilation, ventrical tachycardia, and Torsades de Pointes. Notably, only one the four beat patterns involves just atrial issues, atrial fibrilation. This heart beat consists of a quivering twitching atria that is not effectively pumping any blood into the ventricles. This can lead to death by lack of profusion from the heart. The ventricles simply are not pumping blood, even though the ventricles are pumping correctly, because there is very little blood getting into the ventricles. Ventricle fibrilation is the same type of behavior by the atria but not in the stronger more important ventricle muscles. The quivering here prevents all profusion of blood to the body and lungs because there is no effective pump by the ventricles and the blood pools in the heart. Ventrical tachycardia is when the ventricles are acting without signal from the atria to consistently beat without any rest period between beats. This prevents blood from exiting the heart because there is no time for the ventricles to fill with the succient amount of blood required to sustain life. Finally, Torsades de Pointes is a heart beating pattern that in english means "Twisted Spikes/Peaks". It looks much like a sound wave on soundcloud. This pattern shows the ventricle pumping continuously, but at varying and inconsistent strength. It is non stop beating with either strong or weak pumps, sometimes not beating at all. This is too inconsistent to sustain life by the continuous blood supply needed.
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