Heart pearls! » aberrancy http://www.heartpearls.com For all cardiology enthusiasts! Bonjour! Click on the title above to go to site index so that you can browse the articles! Sun, 18 Jul 2010 07:59:48 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 ECG- Supraventricular tachycardia with aberrancy- features to distinguish from ventricular tachycardia http://www.heartpearls.com/2009/06/what-are-the-main-features-of-supraventricular-tachycardia-with-aberrancy-that-helps-to-distinguish-if-from-ventricular-tachycardia.html http://www.heartpearls.com/2009/06/what-are-the-main-features-of-supraventricular-tachycardia-with-aberrancy-that-helps-to-distinguish-if-from-ventricular-tachycardia.html#comments Tue, 02 Jun 2009 13:53:21 +0000 Dr Jayachandran Thejus MD http://www.heartpearls.com/?p=197
  • RBBB pattern (rsR’ in v1 or qrS in v6).
  • Initial part of the complex is similar to a sinus rhythm complex.
  • Similar complexes seen earlier when patient was in sinus rhythm and then was clearly diagnosed as aberrant conduction.
  • Complex ending a short RR interval after a long RR interval (preceding long RR- short RR sequence; second in a row phenomenon; Ashman phenomenon).
  • The suspected complexes are all having preceding P waves.
  • RBBB and LBBB patterns seen- more likely to be alternating BBB due to varying aberrancy rather than ventricular tachycardias from both ventricles.
    • ]]>     http://www.heartpearls.com/2009/06/what-are-the-main-features-of-supraventricular-tachycardia-with-aberrancy-that-helps-to-distinguish-if-from-ventricular-tachycardia.html/feed 0     Can you rely on AV dissociation to differentiate ventricular tachycardia from supraventricular tachyarrhythmia with aberration? http://www.heartpearls.com/2009/06/can-you-rely-on-av-dissociation-to-differentiate-ventricular-tachycardia-from-supraventricular-tachyarrhythmia-with-aberration.html http://www.heartpearls.com/2009/06/can-you-rely-on-av-dissociation-to-differentiate-ventricular-tachycardia-from-supraventricular-tachyarrhythmia-with-aberration.html#comments Tue, 02 Jun 2009 13:35:31 +0000 Dr Jayachandran Thejus MD http://www.heartpearls.com/?p=194 No, because-

    1. AV dissociation is not present in many VTs- due to retrograde conduction of ventricular tachycardia through the AV node to cause atrial activation.

    2. It may not be always possible to identify P waves on top of the VT. This is more common than appreciated.

    3. There may not be P waves- patient may be in atrial fibrillation along with VT!

    4. Sometimes junctional tachyarrhythmias may conduct down with aberrancy, but may not conduct up into the atria. So dissociated P waves will be present.

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