• artery
  • The nodal body cranial to the sinus nodal artery was more subendocardial than the remaining nodal portion, which was separated from the endocardium by the terminal crest. (bmj.com)
  • The very extensive location of the nodal tissue, the cooling effect of the nodal artery, and the interposing thick terminal crest caudal to this artery have implications for nodal ablation or modification with endocardial catheter techniques. (bmj.com)
  • endocardial
  • 5 This high recurrence rate may be due to autonomically related shifts in the site of impulse formation at the time of ablation but there may also be anatomical reasons preventing the ablation of the required mass of nodal tissues by an endocardial approach. (bmj.com)
  • impulse
  • Lower tracing shows first-degree sinoatrial block, in which the time interval from impulse discharge to atrial activation is prolonged and this cannot be discerned on the surface ECG. (ecgwaves.com)
  • compromise
  • Treatment-R-wave synchronized, direct-current (DC) cardioversion under general anaesthesia or deep sedation is the most effective and immediate means of terminating sustained tachycardias, and should be employed when tachycardia is associated with haemodynamic compromise. (enetmd.com)