Key result
Idiopathic ventricular arrhythmias originating from the free wall of the right ventricular outflow tract accounted for 9% of cases and could be differentiated from septal origins with 100% specificity using an RR' pattern in inferior leads and an S-wave >3.0 mV in lead V2.
Why the study?
What are the distinct electrocardiographic characteristics that differentiate idiopathic ventricular arrhythmias originating in the free wall of the RVOT from those originating in the septum?
Population
110 patients with idiopathic ventricular tachycardia or premature ventricular contraction who underwent…
Comparison
Ventricular arrhythmia originating in the free… vs Ventricular arrhythmia originating in the RVOT…
Design
Cohort
Authors
Loading...
ECG criteria may aid differentiation of RVOT free wall from septal VA; leaves open prospective validation before routine use.
Observational (n=110)
Yes
What are the distinct electrocardiographic characteristics that differentiate idiopathic ventricular arrhythmias originating in the free wall of the RVOT from those originating in the septum?
Absolute Event Rate: 90% vs 20%
p-value: p=<0.001
Idiopathic ventricular arrhythmias originating from the RVOT free wall have distinct ECG characteristics, such as an RR' pattern in inferior leads and deep S-waves in V2, which can differentiate them from septal origins.
Tada et al. (2004) conducted an observational in Idiopathic ventricular tachycardia or premature ventricular contractions originating from the right ventricular outflow tract (n=110). Free wall RVOT origin (FW-VT/PVC) vs. Septal RVOT origin (Sep-VT/PVC) was evaluated on S wave amplitude of at least 3.0 mV in lead V2 (p=<0.001). Idiopathic ventricular arrhythmias originating from the free wall of the right ventricular outflow tract accounted for 9% of cases and could be differentiated from septal origins with 100% specificity using an RR' pattern in inferior leads and an S-wave >3.0 mV in lead V2.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: