[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-444794-105":59,"doc-detail-444794-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","tachycardia-termination-without-global-propagation-is-the-pacing-site-in-or-out","Tachycardia Termination Without Global Propagation - Is the Pacing Site In or Out?","","Ventricular tachycardia termination by pacing with non-global capture provides a criterion for identifying a critical component of the re-entrant circuit, independent of whether concealed entrainment is demonstrated at that site. This phenomenon is often seen nearly by chance, yet it can also be intentionally reproduced by delivering a single extrastimulus during active tachycardia. The case report frames how pacing response informs whether the pacing site lies within or outside the circuit.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/tachycardia-termination-without-global-propagation-is-the-pacing-site-in-or-out/444794/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/tachycardia-termination-without-global-propagation-is-the-pacing-site-in-or-out/444794.png","ImageObject",300,407,{"name":92,"@type":93},"Guten tag","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does non-global capture indicate during ventricular tachycardia pacing?","Question",{"text":112,"@type":113},"Termination with non-global capture indicates a critical component of the re-entrant circuit, even if concealed entrainment is not demonstrated at that pacing site.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How can tachycardia termination by non-global capture be intentionally demonstrated?",{"text":117,"@type":113},"By introducing a single extrastimulus during tachycardia, rather than relying on chance occurrence.",{"name":119,"@type":110,"acceptedAnswer":120},"What was the clinical context of the case presented?",{"text":121,"@type":113},"A 72-year-old man referred for catheter ablation of incessant ventricular tachycardia had a prior myocardial infarction, coronary bypass, and mitral valve replacement; the VT was mapped during tachycardia.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},444794,1792165932,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":19,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":52,"preview_page_count":4},687212321768,"https://ap-avatar.wpscdn.com/avatar/a0010bdbe886d2fe77?x-image-process=image/resize,m_fixed,w_180,h_180&k=1789897067658708522","J Innov Cardiac Rhythm Manage. 2025;16(12):6525–6528  \nDOI: 10. 19102/icrm.2025.16123  \nVENTRICULAR TACHYCARDIA  \nIMAGES IN CARDIAC EP  \nCASE REPORT  \nTachycardia Termination Without Global Propagation: Is the Pacing Site In or Out?  \nOZCAN OZEKE, md, 1 DURSUN ARAS, md,2 and SERKAN TOPALOGLU, md 1  \n1Department of Cardiology, University of Health Sciences, Ankara Bilkent City Hospital, Ankara, Turkey  \n2Department of Cardiology, İstanbul Medipol University, Istanbul, Turkey  \nABSTRACT. Ventricular tachycardia termination by pacing with non-global capture is a specific criterion for identifying a critical component of the re-entrant circuit, regardless of whether concealed entrainment can be demonstrated at that site.It is usually observed almost by chance, but it can also be intentionally demonstrated by introducing a single extrastimulus during tachycardia.  \nKEYWORDS. Non-global capture, tachycardia termination without global propagation, ventricular tachycardia.  \nISSN 2156-3977 (print) ISSN 2156-3993 (online) CC BY 4.0 license  \n© 2025 Innovations in Cardiac Rhythm Management  \nCase presentation  \nA 72-year-old man was referred for catheter ablation of incessant ventricular tachycardia (VT). He had experienceda myocardial infarction 12 years earlier and had previously undergone coronary bypass and mitral valve replacement surgery. An electrocardiogram revealed sustained monomorphic VT characterized by a QRS morphology with a right bundle branch block pattern and a superior axis; the tachycardia cycle length was 430 ms (Figure 1) . The clinical VT was spontaneously induced and was hemodynamically tolerated and mapped (Video 1) . During the tachycardia, a series of single ventricular extrastimuli was delivered from the putative diastolic potential region. Based on the response to ventricular entrainment attempts (Figure 2), we questioned whether the pacing site was in or out of the re-entrant circuit.  \nDiscussion  \nIn the setting of structural heart disease, VT is typically associated with a re-entrant mechanism.1–4 Successful catheter ablation of VT depends on identifying the critical  \nThe authors report no conflicts of interest for the published content. No funding information was provided. ORCID ID, O.O., 0000-0002-4770-8159.  \nManuscript received July 24, 2025. Final version accepted September 11, 2025.  \nAddress correspondence to: Ozcan Ozeke, MD, Salık Bilimleri Üniversitesi, Ankara Bilkent ehir Hastanesi, Kardiyoloji Klinigi, Bilkent, Ankara 06800, [Turkey. Email: ozcanozeke@gmail.com](Turkey. Email: ozcanozeke@gmail.com).  \ntissues that sustain the arrhythmia.5 Four mapping techniques consistently play a role in successful VT ablation: activation mapping, entrainment mapping, pace mapping, and substrate mapping. Entrainment mapping, or continuous resetting of a re-entrant tachycardia, provides a powerful tool for distinguishing between focal andre-entrant VT, as well as identifying critical circuit components such as the entrance, critical isthmus (CI), and exit sites.1,6–12 The detection of the ideal site for ablation within a central CI is a mid-diastolic potential during VT that exhibits concealed fusion with a post-pacing interval equal to the tachycardia cycle length.13 Thus, entrainment mapping helps to identify the CI, but it is not always feasible and, in some cases, terminates VT,14 as occurred in the current tracing. Indeed, local capture of the CI without global ventricular capture (non-global capture [NGC]) can terminate VT by resulting in a bidirectional block (orthodromic or non-orthodromic capture) within the CI.15–18 However, termination might also occur due to a rate-dependent block in the slow-conduction zone during pacing,4,19,20 and catheter contact at a critical endocardial site can interrupt postinfarction VT.21 The stimulus–QRS (S–QRS) interval was significantly shorter at sites where mechanical trauma affected the re-entrant circuit compared with sites having concealed entrainment.21 Therefo","cbCaivUNZdo2KceN","https://ap.wps.com/l/cbCaivUNZdo2KceN","pdf",453831,"English","# Case presentation\n## Discussion\n## Figures and clinical tracing context","[{\"question\":\"What does non-global capture indicate during ventricular tachycardia pacing?\",\"answer\":\"Termination with non-global capture indicates a critical component of the re-entrant circuit, even if concealed entrainment is not demonstrated at that pacing site.\"},{\"question\":\"How can tachycardia termination by non-global capture be intentionally demonstrated?\",\"answer\":\"By introducing a single extrastimulus during tachycardia, rather than relying on chance occurrence.\"},{\"question\":\"What was the clinical context of the case presented?\",\"answer\":\"A 72-year-old man referred for catheter ablation of incessant ventricular tachycardia had a prior myocardial infarction, coronary bypass, and mitral valve replacement; the VT was mapped during tachycardia.\"}]","Tachycardia Termination Without Global Propagation - Is the Pacing Site In or Out? | PDF",1790709292]