Atrial Tachycardias
Microreentrant and triggered atrial tachs are considered this type
This is the property of the AV node to slow signals from reaching the ventricle
What is decremental conduction?
The tachycardia in which the signal goes down the AV node and retrograde through a bypass tract.
What is orthodromic AVRT
Class II drugs are this type of AA drug
What are beta blockers?
Typical flutter goes around this
What is the tricuspid valve?
This is used to induce automatic atrial tachs
What is catecholamines?
This is the path the signal takes in typical AVNRT
Concealed bypass tracts allow conduction in this (or these) directions.
What is retrograde only?
Sodium Channel Blockers are considered this class of AA drug.
What is class I?
In order to be considered typical flutter, this structure must be utilized in its circuit
What is the CTI?
This is where most right atrial focal tachs come from.
What is the crista terminalis?
This is typically the location of the slow pathway on the tricuspid valve.
What is 4 o'clock?
This bypass tract allows for bidirectional conduction.
What is manifest?
These two classes of AA drugs can increase the potential for Torsades to occur.
What are IA and III?
In addition to mapping, this imaging modality can be utilized to visualize where to ablate for typical flutter.
What is ICE (namely in home view)?
This is the response we would see after ventricular overdrive pacing for focal tachs
What is VAAV response?
These two things are typically required to be seen prior to AVNRT ablation.
What are AH jump and echo beats?
A delta wave is caused by what?
Preexcitation of the ventricles
This drug exhibits properties of all 4 classes of AA drugs
As we are ablating, this indicates that we have a good block formed.
What are split A's>150 ms apart?
This is the unipolar signal we would see if our ablation catheter was on the focus.
What is monophasic QS (all negative)?
This is what a sudden rise in impedance during ablation of AVNRT probably means
A's and V's during AVRT typically look like this.
What is fused?
Digoxin has these 2 effects on cardiac tissue.
What are increased inotropy and parasympathetic activity?
These 2 complementary views are useful in visualizing the CTI.
What are LAO caudal and RAO?