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We report the case of an 8-year-old boy with left ventricular noncompaction cardiomyopathy (LVNC) and QT prolongation who experienced further prolongation of the QTc during general anesthesia for extraction of a maxillary mesiodens. Pronounced prolongation of the QTc was observed after induction of general anesthesia with thiamylal and during emergence. No notable fluctuations in blood pressure, heart rate, and estimated continuous cardiac output were observed. We considered it likely that the QT prolongation was triggered by thiamylal and increased sympathetic nervous system activity. During general anesthesia for children with LVNC and QT prolongation, it is necessary to monitor intraoperative hemodynamic fluctuations and prepare for the possible occurrence of arrhythmias.

Keywords: Left ventricular noncompaction; General anesthesia; QTc; QT prolongation; Cardiac output
Copyright: © 2023 by the American Dental Society of Anesthesiology

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Article Contents

The Use of Pharyngeal Throat Packs in Dental Anesthesia

Takuro Sanuki DDS, PhD,
 Naotaka Kishimoto DDS, PhD,
 Shota Tsukimoto DDS, PhD, and
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