![]() ![]() Instead, other areas along the lower electrical pathway take over the pacemaking role. Ventricular tachycardia is a condition in which the SA node no longer controls the beating of the ventricles. Ventricular Arrhythmias Ventricular Tachycardia If it begins above the ventricles, it is called supraventricular tachycardia. If it begins in the ventricles, it is called ventricular tachycardia. The many forms of tachycardia depend on where the fast heart rate begins. Tachycardia is a very fast heart rate of more than 100 beats per minute. This damage might be related to heart disease, aging, inherited or congenital defects, or it might be caused by certain medicines-including those used to control arrhythmias and high blood pressure. It may be caused by one of two sources: The central nervous system does not signal that the heart needs to pump more, or the SA node may be damaged. It happens when the electrical impulse that signals the heart to contract is not formed in your heart’s natural pacemaker, the sinoatrial node (SA node), or is not sent to the heart’s lower chambers (the ventricles) through the proper channels.īradycardia most often affects elderly people, but it may affect even the very young. Bradycardiaīradycardia is a very slow heart rate of less than 60 beats per minute. The irregular beats can either be too slow (bradycardia) or too fast (tachycardia). Supraventricular arrhythmias occur in the area above the ventricles, usually in the upper chambers of the heart, called the atria. Ventricular arrhythmias occur in the lower chambers of the heart, called the ventricles. ![]()
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