Abbott Ventricular Tachycardia PAS

Inclusion Criteria:

1. Patient or legally acceptable representative or parent/guardian (as applicable) mustprovide written informed consent prior to any clinical investigation-relatedprocedure

2. Subjects who have recurrent, drug-refractory, sustained MMVT with non-ischemicstructural heart disease and a clinical decision has been made to use FlexAbility SEfor an ablation procedure prior to enrollment in the research study

3. Refractory (i.e. not effective, not tolerated or not desired) to at least one ClassI/III anti-arrhythmic medication for treatment of MMVT

4. Implanted with a market released ICD or CRT-D prior to the Index Ablation Procedure

5. Able and willing to comply with all study requirements

Exclusion Criteria:

1. Documented or known intracardiac thrombus or myxoma

2. Active systemic infection

3. History of atriotomy or ventriculotomy within 4 weeks prior to the Index AblationProcedure

4. Patients with prosthetic valves as the catheter may damage the prosthesis

5. Unable to receive heparin or an acceptable alternative to achieve adequateanticoagulation