Criteria of de Luna et al for Pathologic R Waves in Leads V1 and V2 Associated with a Lateral Myocardial Infarction

 

Patient selection: acute lateral myocardial infarction

 

Parameters:

(1) amplitude of R wave in V1 in mm

(2) amplitude of S wave in V1 in mm

(3) duration of R wave in V1 in milliseconds

 

ratio for the amplitude of R to S waves in V1 =

= (amplitude of R wave) / (amplitude of S wave)

 

Features associated with pathologic R waves:

(1) ratio of R to S wave amplitudes in V1 >= 0.5

(2) amplitude of R wave in V1 > 3 mm

 

"Classic" criteria for pathologic R waves in a lateral AMI:

(1) ratio of R to S wave amplitudes in V1 >= 1

(2) duration of R wave in V1 >= 40 ms (milliseconds)