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  • catheter ablation
  • Tintera J, Porod V, Cihak R , Mlcochova H, Rolencova E, Fendrych P, Kautzner J . Assessment of pulmonary venous stenosis after radiofrequency catheter ablation for atrial fibrillation by magnetic resonance angiography: a comparison of linear and cross-sectional area measurements. (ikem.cz)
  • 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)
  • 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)
  • occurs
  • However, mapping studies in animal models provide evidence that transverse conduction across the CT occurs in normal hearts (15,16) . (onlinejacc.org)
  • propafenone
  • Kingma JH, Suttorp MJ (1992) Acute pharmacologie conversion of AF and flutter: the role of flecainide, propafenone and verapamil. (springer.com)
  • intervals
  • The conduction ratio is variable, and the intervals between the conducted P waves and the QRS complexes vary, as well, reflecting changing refractoriness of the AV node. (ecgguru.com)
  • During shorter coupling intervals, split electrograms and a marked alteration of the activation sequence of its second component were found, indicating a functional conduction block. (onlinejacc.org)
  • The atrial flutter waves are regular and on an electrocardiogram (ECG, EKG) are seen as P waves in a regular 'saw tooth' pattern (small P waves in succession with short or no intervals between each wave). (medicinenet.com)