RESUMO
A new generation of cardiac implantable devices, known as Closed Loop Stimulation pacemakers, are now utilized to reduce episodes of bradycardia, syncope, and tachycardia in pregnant women. The device functions differently than conventional pacemakers by responding to changes in the patient`s cardiac output and heart rate based on physiologic demands and acute mental stress. Increased metabolic demands, including physiologic stress often accompany pregnancy, labor, and delivery. The Certified Registered Nurse Anesthetist providing analgesia and anesthesia for the laboring patient with CLS pacemaker may encounter rapid changes in heart rates, initiation of pacing modes, and hypotension resulting from reduced cardiac outputs. The ability to differentiate and diagnose the causes of hemodynamic changes and provide appropriate interventions is essential to optimize maternal and fetal outcomes. This case report details the anesthetic management of a laboring twenty-five-year-old primigravida with an implantable CLS pacemaker secondary to a history of third degree heart block, cardiac ablation after supraventricular tachycardia, and seizures. The parturient experienced intermittent pacing after neuraxial analgesia. Anticipation of the CLS pacemaker's response to the parturient's physiological and emotional response during the labor process will be discussed including recommendations to optimize maternal and fetal outcomes.