label: Inappropriate sinus tachycardia
label_lc: inappropriate sinus tachycardia
description: "Inappropriate sinus tachycardia is a nonparoxysmal tachyarrhythmia characterized by an increased resting heart rate (HR) and/or an exaggerated HR response to minimal exertion or a change in body posture. HR is constantly above the physiological range with no appropriate relation to metabolic or physiological demands."