Key result
Patients with multiple morphologies of left ventricular outflow tract VT had a trend toward more frequent recurrences after ablation compared to those with a single morphology (70% vs 22%; P=0.07).
Why the study?
Does the presence of multiple VT morphologies indicate a scar-related reentrant mechanism with different ablation outcomes compared to single morphology VT in patients without overt structural heart disease?
Observational (n=54)
Does the presence of multiple VT morphologies indicate a scar-related reentrant mechanism with different ablation outcomes compared to single morphology VT in patients without overt structural heart disease?
Absolute Event Rate: 70% vs 22%
p-value: p=0.07
In patients without overt structural heart disease, multiple morphologies of LVOT VT suggest a scar-related reentrant mechanism that is more difficult to ablate and has a higher recurrence rate than single morphology idiopathic VT.
Authors
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Multiple morphologies may signal higher ablation recurrence risk; leaves open scar-related reentry in idiopathic LVOT VT.
Nagashima et al. (2013) conducted an observational in Sustained outflow tract ventricular tachycardia without overt structural heart disease (n=54). Multiple morphologies (MM) of inducible left ventricular outflow tract VT vs. Single VT morphology (SM) was evaluated on Recurrences of ventricular tachycardia (p=0.07). Patients with multiple morphologies of left ventricular outflow tract VT had a trend toward more frequent recurrences after ablation compared to those with a single morphology (70% vs 22%; P=0.07).