Criteria for chamber enlargement RA p wave amp >3mm LA bifid p wave and prolonged >.10 secs - ie 2.5 squares (.08 secs in infants) RV - use Davignon charts.
{"Image DocumentName": "Criteria for chamber enlargement", "Image ImageDescription": "RA p wave amp >3mm. LA bifid p wave and prolonged >.10 secs - ie 2.5 squares (.08 secs in infants) RV - use Davignon charts. R in V1>20v (4 squares) >25v in neonates or S in V6 >7v. OR upright T wave in V1 after 72 hours and up to 5 years. Severe RVH- ST and T wave now invert with ST depression, and small Q wave in lead V1. LV R in V6 >25v (5 squares). Severe- ST depression and T wave inversion V6.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}