Key result
A V2 transition ratio >1.1 predicted a left ventricular outflow tract origin with a sensitivity of 83% and specificity of 88% compared to a right ventricular origin.
Why the study?
Do the V2 transition ratio and V2Rp time accurately distinguish left from right ventricular outflow tract tachycardia in patients with LBBB?
Observational (n=24)
No
Do the V2 transition ratio and V2Rp time accurately distinguish left from right ventricular outflow tract tachycardia in patients with LBBB?
Absolute Event Rate: 1.5% vs 0.18%
p-value: p=0.0004
The V2 transition ratio and V2Rp time are highly sensitive and specific ECG criteria for distinguishing left from right ventricular outflow tract tachycardia origins in patients with LBBB.
No takes yet. Share an insight, caveat, or question.
May aid ECG localization of outflow tract VT; hypothesis-generating and requires prospective validation before practice change.
Ohkubo et al. (2015) conducted an observational in Outflow tract premature ventricular contractions/ventricular tachycardia (n=24). V2 transition ratio vs. Right ventricular outflow tract origin was evaluated on V2 transition ratio (p=0.0004). A V2 transition ratio >1.1 predicted a left ventricular outflow tract origin with a sensitivity of 83% and specificity of 88% compared to a right ventricular origin.
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