{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T21:51:50Z","timestamp":1783029110122,"version":"3.54.6"},"reference-count":13,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2020,10,3]],"date-time":"2020-10-03T00:00:00Z","timestamp":1601683200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2020,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Achieving a favorable pacing threshold with a Micra transcatheter pacing system (Micra\u2010TPS) is needed to reduce battery depletion. In some cases, the threshold increases shortly after the device is implanted, and a higher pacing threshold may be required. This study aims to identify the causes and predictors of the increase in pacing threshold observed shortly after Micra\u2010TPS implantation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The study included 64 consecutive patients who underwent Micra\u2010TPS implantation between 2017 and 2020. The patients were divided into two groups depending on their pacing threshold: the increased pacing threshold (IPT) group (threshold increased by \u22650.5 V\/0.24 ms within 1 month of implantation) and the stable pacing threshold (SPT) group.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Excluding four patients who could not be followed up, of the 60 remaining patients, nine (15%) were in the IPT group and 51 (85%) were in the SPT group. The IPT group had significantly lower implant impedance values and higher implant thresholds than the SPT group (582 \u00b1 59\u00a0vs 755 \u00b1 167 \u03a9 [<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.001] and 1.29 \u00b1 0.87\u00a0vs 0.71 \u00b1 0.40 V\/0.24 ms [<jats:italic>P<\/jats:italic>\u00a0=\u00a0.014]). Implant impedance and threshold may serve as predictors of a threshold increase after implantation (area under the curve: 0.737\u20100.943 and 0.586\u20100.926, respectively).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>An IPT was noted shortly after Micra\u2010TPS implantation owing to micro\u2010dislodgement because of insufficient anchoring of the device to the myocardium. Impedance\u00a0&gt;660 \u03a9 and threshold\u00a0&lt;1.0 V\/0.24 ms may predict an increase in pacing threshold.<\/jats:p><\/jats:sec>","DOI":"10.1111\/pace.14080","type":"journal-article","created":{"date-parts":[[2020,9,24]],"date-time":"2020-09-24T11:42:18Z","timestamp":1600947738000},"page":"1351-1357","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Predictors of increase in pacing threshold after transcatheter pacing system implantation due to micro\u2010dislodgement"],"prefix":"10.1111","volume":"43","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1102-8338","authenticated-orcid":false,"given":"Motoaki","family":"Higuchi","sequence":"first","affiliation":[{"name":"Department of Cardiology Mito Saiseikai General Hospital  Mito Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8661-805X","authenticated-orcid":false,"given":"Yasutoshi","family":"Shinoda","sequence":"additional","affiliation":[{"name":"Department of Cardiology Mito Saiseikai General Hospital  Mito Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomoaki","family":"Hasegawa","sequence":"additional","affiliation":[{"name":"Department of Cardiology Mito Saiseikai General Hospital  Mito Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mayu","family":"Ishibashi","sequence":"additional","affiliation":[{"name":"Department of Cardiology Mito Saiseikai General Hospital  Mito Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norihiro","family":"Yamada","sequence":"additional","affiliation":[{"name":"Department of Cardiology Mito Saiseikai General Hospital  Mito 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