Atrial tachycardia is a medical term describing an abnormally fast heart rate originating from the upper chambers of the heart. There are several other terms that can be used synonymously with atrial tachycardia, including supraventricular tachycardia, atrial flutter, and paroxysmal atrial tachycardia. These terms are all used to describe the same condition, but may be used in different contexts or medical specialties. Regardless of the term used, atrial tachycardia is a serious condition that requires prompt medical attention and treatment to prevent potential complications such as stroke or heart failure.