Cornell Index & Product

What are the Cornell index and Cornell product?

Cornell voltage (RaVL + SV3) and Cornell voltage-duration product are ECG criteria used to support screening for left ventricular hypertrophy (LVH).

They are not definitive tests; sensitivity is limited, and echocardiography is commonly used to confirm LVH when clinically needed.

How is it calculated?

• Cornell Voltage = RaVL + SV3 (use absolute wave amplitudes).
• Voltage thresholds: ≥28 mm in men, ≥20 mm in women.
• Cornell Product = (RaVL + SV3 + 8 mm in women) × QRS duration (ms).
• Cornell Product threshold: ≥2440 mm·ms.
• You may enter amplitudes in mm or mV and QRS in ms or seconds; the calculator converts automatically.

Interpretation

• If Cornell Voltage meets the sex-specific threshold, LVH criteria are positive.
• If Cornell Product ≥2440 mm·ms, LVH criteria are positive.
• If either criterion is positive, ECG suggests LVH (screening).
• If both are negative, LVH is not excluded—consider echocardiography if clinically indicated.

How to use the result

This tool supports clinical judgment and should be interpreted within local protocols and patient context. ECG criteria may be influenced by body habitus, lead placement, conduction abnormalities, and calibration.

• Enter wave amplitudes as magnitudes (positive numbers).
• Ensure the ECG calibration is correct (commonly 10 mm/mV).
• If QRS is wide (e.g., bundle branch block), ECG LVH criteria may be less reliable.
• Use echocardiography for confirmation when LVH diagnosis will change management.