**4.5 Pava criteria using the measurement of the R-wave peak time (RWPT) in lead II**

An R-wave peak time, with the interval from QRS onset to first change in polarity (R or S peak) in lead II ≥ 50 ms, independent of whether the complex is positive or

**Figure 4.** *The R-wave peak time (RWPT) in lead II.*

*Electrocardiographic Differential Diagnosis of Narrow QRS and Wide QRS Complex… DOI: http://dx.doi.org/10.5772/intechopen.102568*

**Figure 5.** *Vereckei aVR algorithm.*

negative, has been reported to have a sensitivity of 93% and specificity of 99% for identifying VT (**Figure 4**) [50–64, 70].
