What causes Aberrancy?

Aberrant conduction occurs when the length of the cardiac cycle is changed without a compensatory change in the length of the refractory period. This is explained by the changes of the refractoriness in the His-Purkinje system related to changes in the RR interval.

What is af Aberrancy?

Atrial fibrillation in the presence of either bundle branch block or pre-excitation (accessory pathway) will result in an irregular wide complex tachycardia that may be mistaken for polymorphic VT. It is important to carefully check the ECG for the typical highly irregular rhythm of atrial fibrilation.

What is an aberration of the heart?

Aberration occurs when the electrical activation of the heart, which is caused by a series of action potentials is conducting improperly, which can be due to: left anterior fascicular block. left posterior fascicular block.

What is atrial tachycardia with Aberrancy?

Atrial tachycardia with aberrant conduction Aberrant conduction is defined as conduction through the atrioventricular node with delay or block, resulting in a broader QRS complex. Aberrant conduction usually manifests as left or right bundle branch block, both of which have characteristic features.

What is SVT with aberrancy?

The term “SVT with aberrancy” tends to throw many providers off so let’s start by defining SVT using the 2015 ACC/AHA/HRS Guidelines as reference. “An umbrella term used to describe tachycardias (atrial and/or ventricular rates in excess of 100 bpm at rest), the mechanism of which involves tissue from the His bundle or above.

What is the treatment for wide complex tachycardia?

As previously stated, short-term management of supraventricular tachycardia ( SVT ) involves intravenous adenosine or calcium channel blockers. In cases of wide-complex tachycardia, hemodynamically stable patients can be treated with intravenous procainamide, propafenone, or flecainide.

What is aberrant conduction?

Aberrant Conduction. A term of art referring to the transmission of electromechanical impulses through variant pathways. Aberrant conduction during supraventricular tachycardia results in a wide-complex tachycardia, and occurs in persons of all age groups.

What is an aberrant beat?

Aberrant Beats Occurring Exclusively as the Second in a Row of Beats. The reason that only the second in a row of beats tends to be aberrant is that it is the only beat that ends a relatively short cycle preceded by a relatively long cycle (see Fig. 20.1).