Spontaneous Transition of 2:1 Atrioventricular Block to 1:1 Atrioventricular Conduction During Atrioventricular Nodal Reentrant Tachycardia:. Evidence Supporting the Intra-Hisian or Infra-Hisian Area as the Site of Block
| العنوان: | Spontaneous Transition of 2:1 Atrioventricular Block to 1:1 Atrioventricular Conduction During Atrioventricular Nodal Reentrant Tachycardia:. Evidence Supporting the Intra-Hisian or Infra-Hisian Area as the Site of Block |
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| المؤلفون: | Chern En Chiang, Wen Chung Yu, Ching Tai Tai, Mau Song Chang, Shih Ann Chen, Jun Jack Cheng, Yu An Ding, Shih Huang Lee |
| المصدر: | Journal of Cardiovascular Electrophysiology. 14:1337-1341 |
| بيانات النشر: | Wiley, 2003. |
| سنة النشر: | 2003 |
| مصطلحات موضوعية: | Adult, Male, Tachycardia, medicine.medical_specialty, medicine.medical_treatment, Bundle-Branch Block, Catheter ablation, Heart Conduction System, Physiology (medical), Internal medicine, Block (telecommunications), medicine, Humans, Tachycardia, Atrioventricular Nodal Reentry, Aged, Bundle branch block, Left bundle branch block, business.industry, Middle Aged, medicine.disease, Atrioventricular node, Heart Block, medicine.anatomical_structure, Catheter Ablation, cardiovascular system, Cardiology, Female, medicine.symptom, Electrophysiologic Techniques, Cardiac, Cardiology and Cardiovascular Medicine, business, Atrioventricular block, AV nodal reentrant tachycardia |
| الوصف: | Introduction: The incidence of spontaneous transition of 2:1 AV block to 1:1 AV conduction during AV nodal reentrant tachycardia has not been well reported. Among previous studies, controversy also existed about the site of the 2:1 AV block during AV nodal reentrant tachycardia. Methods and Results: In patients with 2:1 AV block during AV nodal reentrant tachycardia, the incidence of spontaneous transition of 2:1 AV block to 1:1 AV conduction and change of electrophysiologic properties during spontaneous transition were analyzed. Among the 20 patients with 2:1 AV block during AV nodal reentrant tachycardia, a His-bundle potential was absent in blocked beats during 2:1 AV block in 8 patients, and the maximal amplitude of the His-bundle potential in the blocked beats was the same as that in the conducted beats in 4 patients and was significantly smaller than that in the conducted beats in 8 patients (0.49 ± 0.25 mV vs 0.16 ± 0.07 mV, P = 0.007). Spontaneous transition of 2:1 AV block to 1:1 AV conduction occurred in 15 (75%) of 20 patients with 2:1 AV block during AV nodal reentrant tachycardia. Spontaneous transition of 2:1 AV block to 1:1 AV conduction was associated with transient right and/or left bundle branch block. The 1:1 AV conduction with transient bundle branch block was associated with significant His-ventricular (HV) interval prolongation (66 ± 19 ms) compared with 2:1 AV block (44 ± 6 ms, P < 0.01) and 1:1 AV conduction without bundle branch block (43 ± 6 ms, P < 0.01). Conclusion: The 2:1 AV block during AV nodal reentrant tachycardia is functional; the level of block is demonstrated to be within or below the His bundle in a majority of patients with 2:1 AV block during AV nodal reentrant tachycardia, and a minority are possibly high in the junction between the AV node and His bundle. (J Cardiovasc Electrophysiol, Vol. 14, pp. 1337-1341, December 2003) |
| تدمد: | 1540-8167 1045-3873 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::286ba2f630452a44455a4857d66ab5a4 https://doi.org/10.1046/j.1540-8167.2003.03198.x |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....286ba2f630452a44455a4857d66ab5a4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15408167 10453873 |
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