{"id":11748,"date":"2025-07-26T03:28:10","date_gmt":"2025-07-26T01:28:10","guid":{"rendered":"https:\/\/valintermed.com\/?p=11748"},"modified":"2025-07-26T03:28:10","modified_gmt":"2025-07-26T01:28:10","slug":"neadekvatnaya-sinusovaya-tahikardiya-ist","status":"publish","type":"post","link":"https:\/\/valintermed.com\/en\/medlibrary\/inadequate-sinus-tachyarrhythmia\/","title":{"rendered":"Inappropriate sinus tachycardia (IST)"},"content":{"rendered":"
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Inappropriate sinus tachycardia (IST) is a condition characterized by an abnormally elevated heart rate exceeding 100 beats per minute in the absence of other structural heart disease. It is a functional disorder that is most often seen in young women and can occur both under physical exertion and at rest. The underlying mechanism for IST is hyperactivity of the sinus node, resulting in increased automaticity and decreased sensitivity to neurogenic influences. Patients may experience symptoms of autonomic dysfunction such as palpitations, shortness of breath, dizziness, and sweating. Although the condition may be subjectively severe, it is most often not life-threatening and requires a comprehensive approach to management.<\/p>\n

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