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1. Objective:To study the morphological changes of atrioventricular junction area (atrioventricular node and atrioventricular bundle) on the myocardial ischemia model of rat.

2. Methods The structures of rabbit atrioventricular node tissue were observed by semi-thin and ultra-thin sections under light microscope.

3. Results The cell type of atrioventricular node in fetus hearts were composed of light, dark and transitional cells.

4. Objective : To investigate the aging changes of atrioventricular node ( AVN ) and His bundle.

5. Care should be taken to avoid injury of atrioventricular node and coronary vessels.

6. Conclusion In patients with dual atrioventricular node pathways and a documented but noninducible PSVT, catheter ablation of slow-pathway is highly effective in preventing the tachycardia.

7. Comparative studies between the sinus node and the atrioventricular node have revealed relatively few histological differences.

8. Objective To study the ultrastructure of the atrioventricular node in normal adult human heart.

9. Methods HE staining was applied on the frozen sections of adult rat heart to identify the sinoatrial node (SAN), atrioventricular node (AVN),(sentencedict.com) and posterior nodal extension (PNE).

10. Results: Adrenergic fibers largely exist in adult cardiac conduction system, which mainly located in atrionector, little in atrioventricular node, and less in atrioventricular bundle.

11. Objective: To observe the effect of experimental myocardial lesion on dehydrogenase in rat atrioventricular node area and to discuss the mechanism of arrhythmia induced by myocardial lesion.

12. Conclusion The results suggest that dle effect of parasympathetic nerve activity on atrioventricular node function is larger than that of sinoatrial node.

13. It is characterized by sinoatrial node dysfunction and often includes atrioventricular node disease and bundle branch block.

14. The present results suggest that the parasympathetic fibers in the atrioventricular node and the bundle of His originate from the cholinergic neurons in the interatrial septum.

15. There is this specially adapted system of muscle and nerve tissue in the heart—the sinoatrial (SA) node, the atrioventricular node, and the Purkinje fibers—which sets the rhythm of the heart.http://sentencedict.com

16. Ohjective: To study the morphological aspects corresponding to the complex electrophysiological signs of dual (multi) -pathway and reentry of the atrioventricular node (AVN) area.

17. Conduction block. A block of your heart's electrical pathways can occur in or near the atrioventricular node, which lies on the pathway between your atria and your ventricles.

18. However, another kind of SSS associated with sinus node and atrioventricular node dysfunction, characterized by long P-R interval, has not yet been reported in the literature.

19. Objective To evaluate the safety and efficacy of the procedure with atrioventricular node ablation and pacemaker implantation in patients with refractory atrial flutter and atrial fibrillation.

20. The ultra-structures and the connection patterns of the conduction relevant cells in different layers of the rabbit atrioventricular node were investigated.

21. Objective To investigate cell type and size of fetus atrioventricular node.

22. Results: Compared with myocardial, the levels of SDH and LDH in atrioventricular node area in model group and control group were lower.