Epicardial catheter ablation of ventricular tachycardia in no entry left ventricle: mechanical aortic and mitral valves.
Circ Arrhythm Electrophysiol
; 8(2): 381-9, 2015 Apr.
Article
in En
| MEDLINE
| ID: mdl-25716991
ABSTRACT
BACKGROUND:
In patients with mechanical aortic and mitral valves and left ventricular tachycardia, catheter ablation may be prevented by limited access to the left ventricle. METHODS ANDRESULTS:
In our series of 6 patients, 2 patients underwent direct surgical ablation and 4 underwent epicardial catheter ablation via a pericardial window. All patients had abnormal low voltage areas with fractionated or delayed isolated potentials on the apical epicardium. Most of the ventricular tachycardias were targeted by pace mapping. Sites with a good pace match or abnormal electrograms were ablated using an irrigated radiofrequency ablation catheter. A microscopic pathological evaluation of the resected tissue from 2 of the open-heart ablation patients revealed dense fibrosis on the epicardium compared with the endocardium, supporting the feasibility of an epicardial ablation for the ventricular tachycardia.CONCLUSIONS:
Epicardial catheter ablation of ventricular tachycardia is a potentially useful therapy in patients who have mechanical aortic and mitral valves.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Aortic Valve
/
Pericardium
/
Heart Valve Prosthesis
/
Pericardial Window Techniques
/
Tachycardia, Ventricular
/
Catheter Ablation
/
Heart Valve Prosthesis Implantation
/
Heart Ventricles
/
Mitral Valve
Type of study:
Diagnostic_studies
/
Etiology_studies
/
Observational_studies
Limits:
Aged
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
Circ Arrhythm Electrophysiol
Journal subject:
ANGIOLOGIA
/
CARDIOLOGIA
Year:
2015
Document type:
Article