"Sinus tachycardia" is a medical condition characterized by an increase in heart rate that exceeds the normal range. This condition may be caused by a variety of factors, including stress, anxiety, or physical exertion. There are several synonyms for this condition, including "supraventricular tachycardia," "tachyarrhythmia," and "fast heart rate." Other terms used to describe this condition include "excessive sinus tachycardia" and "inappropriate sinus tachycardia." Regardless of the name used, patients experiencing these symptoms should seek medical attention immediately to prevent potential long-term complications and manage symptoms. There are also various treatments available for this condition, depending on the underlying cause and severity of symptoms.