. Author manuscript; available in PMC: 2013 Sep 1.

Published in final edited form as: J Child Neurol. 2012 Jun 29;27(9):1187–1192. doi: 10.1177/0883073812448461

Table 2.

Electrocardiogram Criteria in Adult Subjects

Electrocardiogram Feature	Criteria
Right atrial enlargement	P wave >2.5 mV in leads II, III, or aVF
Left atrial enlargement	P wave> 0.12 sec in leads II, III, or aVF, or P wave> 0.04 sec and −1mV (negative deflection) in V₁
Right ventricular hypertrophy	R wave >6mV or rsR′ >0mV in V₁, or S wave >7 mV in V₅ or V₆, or R wave in V1 + S wave in V₆ >10mV
Left ventricular hypertrophy	R wave > 11mV in aVL, or R wave > 25mV in V₅ or V₆, or R wave in V₆ + S wave in V₁ >35mV, or S wave in V₃ + R wave in aVL >24 mV in men and >20 mV in women
Bundle branch block	Same as pediatric
Right axis deviation	>90 degrees
Left axis deviation	>−30 degrees
Intraventricular conduction delay	Same as pediatric
Nonspecific ST-T changes	Same as pediatric
Strain	Same as pediatric