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Peer-reviewedCC BYThe Journal of innovations in cardiac rhythm management

Postextrastimulus Termination of Ventricular Tachycardia: An Indicator of a Good Ablation Site?

  • Meryem Kara1
  • Ozcan Ozeke1
  • Elif Hande Ozcan Cetin1
  • Duygu Kocyigit Burunkaya1
  • Muhammet Genes2
  • Ahmet Korkmaz1
  • Firat Ozcan1
  • Serkan Cay1
  • Dursun Aras3
  • Serkan Topaloglu1
  1. 1Department of Cardiology, University of Health Sciences, Ankara Bilkent City Hospital, Ankara, Turkey.
  2. 2Department of Cardiology, Mehmet Akif İnan Training and Research Hospital, Sanliurfa, Turkey.
  3. 3Department of Cardiology, İstanbul Medipol University, İstanbul, Turkey.
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Abstract

Entrainment mapping, or continuous resetting of a re-entrant tachycardia, provides a powerful tool for distinguishing between focal and re-entrant ventricular tachycardias (VTs) and for identifying critical circuit components, such as the entrance, critical isthmus (CI), and exit sites. However, this technique is not always feasible and, in some cases, may itself terminate VT during the entrainment attempt. Whereas local capture of the CI without global ventricular capture (nonglobal capture [NGC]) can terminate VT by creating a bidirectional block (orthodromic or nonorthodromic capture) within the CI, the VT termination may also occur due to a rate-dependent block in the slow-conduction zone during pacing or as a result of spontaneous or mechanical trauma-related ventricular extrasystoles. Such NGC-related termination does not carry the same mechanistic implications as termination due to NGC. Although this termination is usually observed incidentally, it can also be demonstrated intentionally, eg, by delivering a single extrastimulus during tachycardia, as shown in the present case. Therefore, a careful analysis of the response to entrainment is essential.

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Cite

BibTeXRIS
BibTeX
@article{kara2026postextrastimulus,
  title = {{Postextrastimulus Termination of Ventricular Tachycardia: An Indicator of a Good Ablation Site?}},
  author = {Meryem Kara and Ozcan Ozeke and Elif Hande Ozcan Cetin and Duygu Kocyigit Burunkaya and Muhammet Genes and Ahmet Korkmaz and Firat Ozcan and Serkan Cay and Dursun Aras and Serkan Topaloglu},
  journal = {The Journal of innovations in cardiac rhythm management},
  year = {2026},
  month = jul,
  doi = {10.19102/icrm.2026.17072},
  url = {https://europepmc.org/article/MED/42899018},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Postextrastimulus Termination of Ventricular Tachycardia: An Indicator of a Good Ablation Site?
AU  - Meryem Kara
AU  - Ozcan Ozeke
AU  - Elif Hande Ozcan Cetin
AU  - Duygu Kocyigit Burunkaya
AU  - Muhammet Genes
AU  - Ahmet Korkmaz
AU  - Firat Ozcan
AU  - Serkan Cay
AU  - Dursun Aras
AU  - Serkan Topaloglu
PY  - 2026
DA  - 2026/07/15
JO  - The Journal of innovations in cardiac rhythm management
DO  - 10.19102/icrm.2026.17072
UR  - https://europepmc.org/article/MED/42899018
AB  - Entrainment mapping, or continuous resetting of a re-entrant tachycardia, provides a powerful tool for distinguishing between focal and re-entrant ventricular tachycardias (VTs) and for identifying critical circuit components, such as the entrance, critical isthmus (CI), and exit sites. However, this technique is not always feasible and, in some cases, may itself terminate VT during the entrainment attempt. Whereas local capture of the CI without global ventricular capture (nonglobal capture [NGC]) can terminate VT by creating a bidirectional block (orthodromic or nonorthodromic capture) within the CI, the VT termination may also occur due to a rate-dependent block in the slow-conduction zone during pacing or as a result of spontaneous or mechanical trauma-related ventricular extrasystoles. Such NGC-related termination does not carry the same mechanistic implications as termination due to NGC. Although this termination is usually observed incidentally, it can also be demonstrated intentionally, eg, by delivering a single extrastimulus during tachycardia, as shown in the present case. Therefore, a careful analysis of the response to entrainment is essential.
SN  - 2156-3977
SN  - 2156-3993
ER  -