ABSTRACT Introduction The VDD‐leadless pacemaker aims to maintain high atrioventricular (AV) synchrony, but proper sensing setup is crucial. Methods and Results This case was an elderly woman with an AV block who received a dual‐chamber pacemaker. Due to ventricular pacing failure, a Micra AV2 was implanted. However, postimplantation, high sinus rate, and frequent premature ventricular contractions were noted. Therefore, the auto + A3 threshold function was used in the atrial‐sensing setup. A few days later, the MAM test confirmed good AV synchrony. Conclusion The auto + A3 threshold function equipped in the Micra AV2 may offer to maintain high AV synchrony.

Ryo Ohinata

Naoya Inoue

Shuji Morikawa

Pacing and Clinical Electrophysiology

Pacing and Clinical Electrophysiology (PACE) is the foremost peer-reviewed journal in the field of pacing and implantable cardioversion defibrillation, publishing over 50% of all English language articles in its field, featuring original, review, and didactic papers, and case reports related to daily practice. Articles also include editorials, book reviews, Musings on humane topics relevant to medical practice, electrophysiology (EP) rounds, device rounds, and information concerning the quality of devices used in the practice of the specialty.

PACE - Pacing and Clinical Electrophysiology is the leading peer-reviewed journal in the field of pacing and implantable cardioversion defibrillation, publishing over 50% of all English language articles in this area. The journal features original research, reviews, didactic papers, and case reports relevant to daily practice. Additionally, it includes editorials, book reviews, reflections on humane topics related to medical practice, electrophysiology (EP) rounds, device rounds, and information regarding the quality of devices used in the specialty.

《PACE - Pacing and Clinical Electrophysiology》是心脏起搏和植入式心脏复律除颤领域的顶尖同行评审期刊，发表了该领域超过50%的英文文章。期刊内容包括原创研究、综述、教学论文和与日常实践相关的病例报告。此外，文章还包括社论、书评、与医学实践相关的人文主题思考、电生理（EP）讨论、设备讨论，以及有关该专业使用设备质量的信息。

Category	Quartile
医学	4
医学, 心脏和心血管系统	4
医学, 工程生物医学	4

Utility of the Novel Auto + A3 Threshold Function in Maintaining Atrioventricular Synchrony

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Journal Info

Category	Quartile
ENGINEERING, BIOMEDICAL	3