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  • human atrial
  • Global right atrial mapping of human atrial flutter: the presence of posteromedial (sinus venosa region) functional block and double potentials: a study in biplane fluoroscopy and intracardiac echocardiography. (cogprints.org)
  • Chronic beta-adrenoceptor blockade and human atrial cell electrophysiology: evidence of pharmacological remodelling. (biomedsearch.com)
  • We aimed to investigate electrophysiological changes in human atrial cells associated with chronic treatment with beta-blockers and other cardiovascular-acting drugs. (biomedsearch.com)
  • tachycardias
  • Atrial electrical activation during atrial tachycardias is mostly regular and by definition at a rate faster than 100 bpm, although occasionally the rate may oscillate and be slower. (clinicaladvisor.com)
  • Atrial tachycardias are the least frequent form of supraventricular tachycardias in the general population. (clinicaladvisor.com)
  • Focal atrial tachycardias are frequently assumed to be due to automaticity although micro-reentry and triggered activity are possible and difficult to demonstrate in practice. (clinicaladvisor.com)
  • Macro-reentrant atrial tachycardias involve the participation of a reentry circuit within the atria. (clinicaladvisor.com)
  • Occasionally incessant atrial tachycardias can present as congestive heart failure secondary to dilated cardiomyopathy. (clinicaladvisor.com)
  • Hemodynamic instability is possible but rather rare during atrial tachycardias. (clinicaladvisor.com)
  • During atrial tachycardias, the P-R interval is usually normal, although in the presence of AV nodal disease the P-R interval could be prolonged. (clinicaladvisor.com)
  • Focal and reentrant atrial tachycardias have overlapping characteristics but may present with different clinical patterns and prevalence among different patient populations. (clinicaladvisor.com)
  • Focal atrial tachycardias are rather infrequent and most commonly seen in normal hearts and younger patients, although they could develop at any age. (clinicaladvisor.com)
  • However, proper interpretation of ECG may be rather difficult in patients with AFL and different types of atrial tachycardias (AT). (hvt-journal.com)
  • right atrial
  • The surgical incision in the lateral free wall opens the right atrium of the donor heart from the inferior vena cava toward the right atrial appendage. (onlinejacc.org)
  • Prevention of recurrent AF with long-term dual-site right atrial pacing has been demonstrated in our previous studies. (onlinejacc.org)
  • There was a significant abbreviation of the P wave duration to 103 ± 17 ms with dual-site pacing compared with sinus rhythm (120 ± 12 ms, p = 0.005) and high right atrial pacing (121 ± 17 ms, p = 0.005). (onlinejacc.org)
  • The effective refractory period at the high right atrium remained unchanged with dual-site atrial pacing compared with single-site high right atrial pacing. (onlinejacc.org)
  • Dual-site right atrial pacing from the high right atrium and coronary sinus ostium can suppress inducible AF or atrial flutter elicited after single-site high right atrial pacing in selected patients. (onlinejacc.org)
  • Acute suppression is more likely in patients with greater dispersion of right atrial refractoriness between these two sites. (onlinejacc.org)
  • entrainment
  • 6. Arribas F, Lopez-Gill M, Cosio F, Nunez A. The upper link of human common atrial flutter circuit: definition by multiple endocardial recordings during entrainment. (cogprints.org)
  • Entrainment from the lateral wall of the right atrium and interatrial septum was used to determine the location of atrial flutter in five patients with a transplanted heart and six patients with a nontransplanted heart. (onlinejacc.org)
  • refractory
  • The difference in the effective refractory period between the high right atrium and the coronary sinus ostium pacing sites was significantly greater (33 ± 12 ms) in patients with suppression of atrial tachyarrhythmia with dual-site atrial pacing compared with patients without suppression (15 ± 13 ms, p = 0.001). (onlinejacc.org)
  • Effective refractory period of the AV node may increase, decrease or remain unchanged and atrial effective refractory period is unchanged. (bioportfolio.com)