EKG criteria (precordial leads) for L ventricular hypertrophy.
L axis deviation beyond -15° s often seen.
Increased R wave amplitude in those leads overlying the L ventricle forms the basis for the EKG diagnosis of LVH.
Common theme: increased R wave amplitude in leads overlying the L ventricle and increased S wave amplitude in leads overlying the R ventricle.
** Look at the precordial leads
(more sensitive than limb leads for dx of LVH):
1. R wave
in lead V5 or V6 plus
the S wave
in lead V1 or V2
> 35 mm
2. R wave in lead V5 > 26 mm.
3. R wave in lead V6 > 18 mm.
4. R wave in lead V6 > R wave in lead V5.
- - first criteria has most predictive value
- - These criteria have little value in those < 35 years of age (increased voltage due to thin chest walls)
- - Unreliable in young children.