Atrial tachycardia is an unusually fast heartbeat that originates in the atria, or upper chambers, of the heart. It is a type of supraventricular tachycardia (SVT). This means it begins above the ...
Multifocal atrial tachycardia (MAT) is a type of irregular heartbeat in which the heart beats faster than it should. It’s one of many types of heart arrhythmias or irregular heart rhythms. When your ...