For informational purposes only. Consult a medical professional for advice. Source: Focus Medica A heart rhythm disorder with heartbeats faster than usual, greater than 100 beats per minute.

Background Inappropriate sinus tachycardia (IST) is characterized by persistent and disproportional elevation of heart rate (HR). Ivabradine has been successfully used in some patients.

Background Inappropriate sinus tachycardia (IST ... reported severe complaints assessed by means of European Heart Rhythm Association score. We did not observe severe side effects during therapy.