Repeated ventricular bigeminy by trigeminocardiac reflex despite atropine administration during superficial upper lip surgery: A case report.

Background: The trigeminocardiac reflex (TCR) is usually caused by an increased parasympathetic tone when pressure or traction is applied to the surrounding tissue of the trigeminal nerve. However, the inexperienced anesthesiologists may have challenges on the management of TCR patients.

Case Summary: This is the case of an 18-year-old woman diagnosed with hemangioma of the upper lip. During the operation, about 1 h after surgery started, a constant 1:1 premature ventricular complex was detected, and blood pressure was decreased when approaching the deeper part with more strong traction for exposure of the part. Although the management of arrhythmias, such as lidocaine and atropine, was injected, arrhythmia induced by surgical stimulation could not be eliminated completely. As the traction repeated, bradycardia was also repeated, despite injecting additional atropine. Therefore, the anesthesiologist and the surgeon decided to perform the operation only to the extent that the vascular tissue was selectively removed only at the site without the reflex.

Conclusion: With TCR, anesthesiologists should perform appropriate monitoring. In addition to proper drug administration, surgeons should be consulted to cope with stopping the surgery and setting the scope of the surgery even if the site is superficial.