There are several sets of criteria used to diagnose LVH via electrocardiography.
 None of them are perfect, though by using multiple criteria sets, the sensitivity and specificity are increased.

The Sokolow-Lyon index:
S in V₁ + R in V₅ or V₆ (whichever is larger) ≥ 35 mm (≥ 7 large squares)
R in aVL ≥ 11 mm
The Cornell voltage criteria for the ECG diagnosis of LVH involve measurement of the sum of the R wave in lead aVL and the S wave in lead V₃.  The Cornell criteria for LVH are:
S in V₃ + R in aVL > 28 mm (men)
S in V₃ + R in aVL > 20 mm (women)
The Romhilt-Estes point score system ("diagnostic" >5 points; "probable" 4 points):
Other voltage-based criteria for LVH include:
Lead I: R wave > 14 mm
Lead aVR: S wave > 15 mm
Lead aVL: R wave > 12 mm
Lead aVF: R wave > 21 mm
Lead V₅: R wave > 26 mm
Lead V₆: R wave > 20 mm
There are several sets of criteria used to diagnose LVH via electrocardiography.  None of them are perfect, though by using multiple criteria sets, the sensitivity and specificity are increased.
The Sokolow-Lyon index:
S in V₁ + R in V₅ or V₆ (whichever is larger) ≥ 35 mm (≥ 7 large squares)
R in aVL ≥ 11 mm
The Cornell voltage criteria for the ECG diagnosis of LVH involve measurement of the sum of the R wave in lead aVL and the S wave in lead V₃.  The Cornell criteria for LVH are:
S in V₃ + R in aVL > 28 mm (men)
S in V₃ + R in aVL > 20 mm (women)
The Romhilt-Estes point score system ("diagnostic" >5 points; "probable" 4 points):
Other voltage-based criteria for LVH include:
Lead I: R wave > 14 mm
Lead aVR: S wave > 15 mm
Lead aVL: R wave > 12 mm
Lead aVF: R wave > 21 mm
Lead V₅: R wave > 26 mm
Lead V₆: R wave > 20 mm
Left ventricular hypertrophy