Exploration of Cardiology

ECG criteria	Points
Voltage criteria (any of): 1. R or S in limb leads ≥ 20 mm 2. S in V₁ or V₂ ≥ 30 mm 3. R in V₅ or V₆ ≥ 30 mm	3
ST-T abnormalities: 1. ST-T vector opposite to QRS without digitalis 2. ST-T vector opposite to QRS with digitalis	3 1
Indicates of LA hypertrophy: negative terminal P in V₁ exceeding 1 mm in depth and 40 ms in duration	3
Left axis deviation (QRS of –30 or more)	2
QRS duration ≥ 90 ms	1
Delayed or intrinsic deflection in V₅ or V₆ (> 50 ms)	1
4 points—probable LVH > 5 points—diagnosis of LVH

ECG criteria

Points

Voltage criteria (any of):

1. R or S in limb leads ≥ 20 mm

2. S in V₁ or V₂ ≥ 30 mm

3. R in V₅ or V₆ ≥ 30 mm

ST-T abnormalities:

1. ST-T vector opposite to QRS without digitalis

2. ST-T vector opposite to QRS with digitalis

Indicates of LA hypertrophy: negative terminal P in V₁ exceeding 1 mm in depth and 40 ms in duration

Left axis deviation (QRS of –30 or more)

QRS duration ≥ 90 ms

Delayed or intrinsic deflection in V₅ or V₆ (> 50 ms)

4 points—probable LVH

> 5 points—diagnosis of LVH