What is high Lewis index on a ekg?

A high Lewis index on an EKG refers to an elevated ratio of the R-wave amplitude in lead V1 to the R-wave amplitude in lead V5. This measurement can indicate right ventricular hypertrophy or other forms of cardiac strain, particularly in the context of pulmonary hypertension or other conditions affecting the right side of the heart. It is important to interpret the Lewis index in conjunction with other clinical findings and EKG parameters for an accurate assessment of cardiac health.