Electrophysiologic and anatomic changes in the atrioventricular junction of dogs after direct-current shocks through tissue fixation catheters
| Autor: | Saroja Bharati, Maurice Lev, Yinshi Wang, William Shapiro, Melvin M. Scheinman |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
medicine.medical_specialty
Bundle of His Cardiac Catheterization Heart block Electrocardiography Dogs Heart Conduction System Internal medicine Medicine Animals Electroshock medicine.diagnostic_test business.industry Anatomy medicine.disease Atrioventricular node Bundle branches Catheter medicine.anatomical_structure Heart Block Aortic Valve Heart catheterization Cardiology Atrioventricular Node Electrical conduction system of the heart Cardiology and Cardiovascular Medicine business |
| Zdroj: | The American journal of cardiology. 55(1) |
| ISSN: | 0002-9149 |
| Popis: | Barb-tipped fixation electrode catheters were inserted under fluoroscopic control in the region of the atrioventricular (AV) node in 6 dogs. A series of direct-current shocks (20 to 240 J) were delivered from the electrode catheter to a back plate. Serial electrophysiologic studies were performed before and 2 to 3 weeks after delivery of the shocks. In general, low-energy shocks--20 to 180 J--resulted in predominant damage to the approaches to the AV node, the AV node and common bundle, whereas larger shocks created diffuse damage involving the His bundle and bundle branches. Despite histologic damage to the AV junction, only minimal changes in AV conduction were observed. Thus, there is a large safety margin for AV conduction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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