Short-term results of substrate mapping and radiofrequency ablation of ischemic ventricular tachycardia using a saline-irrigated catheter
Key result
Substrate mapping and irrigated ablation eliminates target VT in 82% of chronic MI patients.
- n=11
Why the study?
Ventricular tachycardia associated with chronic MI is frequently hemodynamically intolerable and pleomorphic, making traditional mapping contingent on hemodynamic stability challenging and ablation outcomes disappointing.
Population
11 consecutive patients with prior MI and ventricular arrhythmias
Design
Consecutive prospective observational study
Follow-up
Mean 13.1 +/- 1.9 weeks
Authors
Discussion
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Implication
Clinical evaluation demonstrates short-term suppression of ischemic ventricular tachycardia via saline-irrigated catheter ablation, highlighting effective substrate modification in scarred myocardium.
Key Points
- Evaluate the short-term efficacy and procedural safety of electroanatomical substrate mapping and radiofrequency ablation using a saline-irrigated catheter in patients with ischemic ventricular tachycardia.
- Patients with ischemic ventricular tachycardia secondary to myocardial infarction underwent electroanatomical substrate mapping to identify scar border zones.
- Radiofrequency energy was delivered using an open saline-irrigated tip catheter to target critical reentry pathways.
- Saline-irrigated radiofrequency ablation achieved acute procedural termination and non-inducibility of targeted clinical ventricular tachycardia.
- Irrigated tip technology facilitated deeper lesion creation across dense scarred ventricular myocardium with acceptable short-term complication rates.
Study Design
Type
Observational (n=11)
PICO
P
Population
11 consecutive patients with a history of myocardial infarction and ventricular arrhythmias, followed for a mean of 13.1 weeks.
I
Intervention / Comparator
Substrate mapping and radiofrequency ablation using a saline-irrigated catheter
O
Primary Outcome
elimination of target VT
Cite This Study
Reddy et al. (2003) conducted an observational in history of MI and ventricular arrhythmias (n=11). Substrate mapping and radiofrequency ablation using a saline-irrigated catheter was evaluated on elimination of target VT. Substrate mapping and radiofrequency ablation using a saline-irrigated catheter eliminated the target ventricular tachycardia in 82% of patients with chronic myocardial infarction.