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 Treatment Treatment is typically focused on resolving the cause of the LVH with the enlargement not permanent in all cases. In some cases the growth can regress with the reduction of blood pressure. LVH may be a factor in determining treatment or diagnosis for other conditions, for example, LVH is used in the staging and risk stratification of Non-ischemic cardiomyopathies such as Fabry's Disease. Patients with LVH may have to participate in more complicated and precise diagnostic procedures, such as Echocardiography or Cardiac MRI. See also Cardiomegaly Primary hyperparathyroidism Ventricular hypertrophy References External links Cardiomegaly