TY - JOUR T1 - Inappropriate tachycardia at rest as a consequence of atrial preference pacing algorithm JO - Revista Portuguesa de Cardiologia (English edition) T2 - AU - Akdemir,Baris SN - 21742049 M3 - 10.1016/j.repce.2020.05.018 DO - 10.1016/j.repce.2020.05.018 UR - https://revportcardiol.org/en-inappropriate-tachycardia-at-rest-as-articulo-S2174204920304177 AB - A 34-year-old female with a past medical history of sick sinus syndrome which requiring placement of single chamber (atrial) permanent pacemaker (Medtronic, Minneapolis, MN, USA). One year after pacemaker implantation, the patient reported exercise intolerance and palpitation at rest. Device interrogation during clinic visit revealed 99% atrial pacing and high atrial rate episodes. What is the mechanism for high atrial rate episodes? Atrial preference pacing (algorithm is a promising method for preventing atrial tachyarrhythmia in patients with an implanted pacemaker. However, instead of using nominal search interval settings, which may not benefit patients, we should individually tailor the programming, identifying the most effective search interval and be aware of possible pro-arrhythmic effects. ER -