Key result
In patients with ventricular arrhythmias originating from the right ventricular outflow tract, VPCs from the free wall were significantly more likely to be tachycardia-dependent compared to those from the septum (p<0.05).
Why the study?
Does the VPC-HR relationship differ based on the specific origin (septal vs. free wall) of ventricular arrhythmias in the right ventricular outflow tract?
Observational (n=10)
Does the VPC-HR relationship differ based on the specific origin (septal vs. free wall) of ventricular arrhythmias in the right ventricular outflow tract?
Absolute Event Rate: 100% vs 12.5%
p-value: p=<0.05
The mechanism of right ventricular outflow tract ventricular arrhythmias differs by origin, with free wall origins showing a positive correlation with heart rate (facilitation type) unlike septal origins.
Suggests distinct mechanisms for right ventricular outflow tract arrhythmias based on anatomic origin; leaves open whether this.
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Ohba et al. (1999) conducted an observational in Ventricular arrhythmias originating from right ventricular outflow tract (n=10). Holter monitoring analysis of VPC-HR relationship vs. Septal vs free wall origin was evaluated on Tachycardia-dependent VPC-HR relationship (p=<0.05). In patients with ventricular arrhythmias originating from the right ventricular outflow tract, VPCs from the free wall were significantly more likely to be tachycardia-dependent compared to those from the septum (p<0.05).
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