Inappropriate sinus tachycardia during pregnancy

Abstract

The clinical syndrome of inappropriate sinus tachycardia (IST) is a paroxysmal or
persistent acceleration of unexplained origin of sinus rhythm, with heart rates over
100 beats per minute at rest. It is an uncommon arrhythmia and a diagnosis of
exclusion, which always requires ruling out systemic causes. IST during pregnancy
has been associated with high rates of hospitalization and labor induction. There is
currently little literature linking IST to pregnancy. We hope that the publication of
the present case will increase awareness of IST during pregnancy among physicians
at all levels of care, to identify the condition, its consequences on the health of the
binomial and the need for multidisciplinary teams for treatment.