Q: Which leads have the longest QT interval?
Answer: Leads V2 and V3
QT intervals vary significantly among different EKG leads. Leads V2 and V3 usually has the longest QT measurements. This simultaneously make these leads most favorable as well as unfavorable, as they are more precise giving the longest measurement but at the same time can deceive due to presence of U waves in these leads (particularly in adolescents).
#cardiology
Reference:
Cowan JC, Yusoff K, Moore M, et al. Importance of lead selection in QT interval measurement. Am J Cardiol 1988; 61:83.
No comments:
Post a Comment