Dual-chamber leadless pacemaker implantation in an 84-year-old woman with ATTR amyloidosis initially failed atrial capture but showed atrial capture at Day 3 and improved pacing thresholds from 3.0 V to 0.5 V over 2 months.
Case Report (n=1)
No
In patients with ATTR amyloidosis undergoing atrial leadless pacemaker implantation, stable current of injury and impedance may predict delayed threshold improvement despite initial capture failure, potentially avoiding risky and unnecessary device repositioning.
Effect estimate: Improvement in pacing threshold from no capture at implantation to 0.5 V at 1.5 ms pulse width at 2 months
ATTR amyloidosis patient with initial atrial capture failure showed delayed threshold improvement over time. Stable current of injury and impedance guided expectant management, avoiding unnecessary device repositioning while achieving successful outcomes.
Takada等（Sun）进行了一项病例报告，涉及一名84岁女性老年患者，患有ATTR心脏淀粉样变性和窦房结功能障碍，反复晕厥和心动过缓（n=1）。评估了双腔无导线起搏器（Aveir DR，雅培）植入后心房起搏捕捉和阈值的改善（植入时无捕捉到2个月时的0.5 V在1.5 ms脉冲宽度下的阈值改善）。在一名84岁患有ATTR淀粉样变性的女性中，双腔无导线起搏器的植入最初未能实现心房捕捉，但在第3天显示心房捕捉，并且在2个月内起搏阈值从3.0 V改善到0.5 V。