In reading EKG, or ECG, outputs, there are many different types of dangerous systoles: deadly beating patterns of the heart. The four major deadly heart behaviors 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: the atrial fibrilation. This irregular heart beat consists of a quivering or 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 enough blood, even though the ventricles are pumping correctly, because there is very little blood getting into the them. Ventricle fibrilation is the same type of behavior seen in atria fibrilation but 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 ocurrs when the ventricles are acting without signal from the atria, and instead 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 similar to 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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