Index
Ep Defined | Getting Started | Working in the EP Lab
Right Atrium | Right Ventricle | Left Atrium | Left Ventricule | Cardiac Conduction | Cardiac Cell Properties | Action Potential | Sympathetic or Not | Med Page
Electrograms Defined | Recording Modes | Electrode Spacing | Filters | EGM Interpretation | Arrhythmia Analysis
The Physical Lab | Tools of the Trade
Setting Up | Catheter Placement | Baseline Measurement | SNRT | Conduction Study | Arrhythmia Induction | Pacing Protocols | Ablation | Tilt Table | Secrets to Success
Bradycardia | Atrial Tach | Atrial Flutter | Atrial Fibrillation | AVNRT | AVRT | Ventricular Tachycardia
Surface ECG's | Intracardiac Questions | Med Challenge | Advanced

Cardiac Arrhythmias - Atrial Flutter

Atypical Flutter

• Atypical Flutter is often used to describe any circuit that is not dependant upon the right atrial isthmus.
• Included in this group are scar mediated flutters, upper loop flutters, crista flutters and left atrial flutters.
- Left Atrial (Post AF ablation) 200ms

          Using this definition, the most common atypical flutters are scar mediated flutters found in the right atrium. These flutters utilized atriotomy scars as the zones of critical slow conduction. Another subset of this classification of flutters is the post Fontan surgery flutters that sometimes occur years after surgery when the patient is in their teens. There are also more rare left atrial flutters that most commonly occur after ablation procedures for atrial fib. All of these flutters will be discussed below.

Scar Mediated Right Atrial Flutter

          These flutters utilized atriotomy scars as the zones of critical slow conduction.

Post Fontan Atrial Flutter

          Another subset of this classification of flutters is the post Fontan surgery flutters that sometimes occur years after surgery when the patient is in their teens.

Left Atrial Flutter

          There are also more rare left atrial flutters that most commonly occur after ablation procedures for atrial fib. All of these flutters will be discussed below.


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