Atrial Flutter Ablation With Contact Therapy Cool Path Ablation System Along With EnSite Velocity Contact System

This will be a prospective, multi-center and non-randomized study. All enrolled patients who
meet the eligibility criteria will receive ablation therapy for typical atrial flutter using
the Contact Therapy™ Cool Path™ Cardiac Ablation System. Historical data from published (PMA
P060019 Cool Path) , reported (IDE G090109 Cool Path Duo) and published literature on Atrial
Flutter RF ablation studies is used to determine performance goals for primary study
endpoints and derive the sample size. In addition, the following analyses will be performed
in the study

1. Validation of ECI against conventional methods of assessing tip tissue contact and

2. Ancillary analysis to assess the relationship between the ECI and study outcomes.
Subjects will undergo two follow up visits at day 10 and month 3 post procedure. The
following assessments will be performed during these visits:

- ECG

- Query regarding adverse events since the last visit

- Assessment of anti-arrhythmic and anti-coagulation medication

- Query regarding recurrence or repeat ablation for typical atrial flutter

Inclusion Criteria:

- A signed written Informed Consent

- Presence of typical atrial flutter (cavo-tricuspid isthmus dependent)

- If subjects are receiving antiarrhythmic drug therapy (Class I or Class III AAD) for
an arrhythmia other than typical atrial flutter, then they need to be controlled on
their medication for at least 3 months. If a subject had typical atrial flutter before
starting the AAD(s) (Class I or Class III) and then subsequently had another
arrhythmia (i.e. atrial fibrillation), then the 3 month AAD criteria will not apply.

- One documented occurrence of the study arrhythmia documented by ECG, Holter, telemetry
strip, or transtelephonic monitor within the past 6 months

- In good physical health

- 18 years of age or older

- Agree to comply with follow-up visits and evaluation

Exclusion Criteria:

- Prior typical atrial flutter ablation treatment

- Pregnancy

- Atypical flutter or scar flutter (non isthmus dependent)

- Significant coronary heart disease or heart failure; that is unstable angina pectoris
and/or uncontrolled congestive heart failure (NYHA Class III or IV) at the time of
enrollment

- A recent myocardial infarction within 3 months of the intended procedure date

- Permanent coronary sinus pacing lead

- Clinically significant tricuspid valvular disease requiring surgery and/or a
prosthetic tricuspid heart valve.

- Evidence of intracardiac thrombus or a history of clotting disorders

- Participation in another investigational study

- Cardiac surgery within 1 month prior to the intended procedure date

- Allergy or contraindication to Heparin