In the Sokolow-Lyon criterion, which measurement sum is used?

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Multiple Choice

In the Sokolow-Lyon criterion, which measurement sum is used?

Explanation:
Voltage criteria for left ventricular hypertrophy rely on the idea that a enlarged left ventricle produces stronger electrical forces visible in the ECG as a deep S wave in the right precordial lead and a tall R wave in the lateral leads. The Sokolow-Lyon criterion specifically uses the S wave amplitude in V1 plus the R wave amplitude in V5 or V6, and if that sum is 35 mm or greater, LVH is suggested. That matches the option described here: S in V1 plus R in V5/V6 ≥ 35 mm. The other patterns don’t reflect this exact pair or the same threshold, so they aren’t the Sokolow-Lyon measurement criterion.

Voltage criteria for left ventricular hypertrophy rely on the idea that a enlarged left ventricle produces stronger electrical forces visible in the ECG as a deep S wave in the right precordial lead and a tall R wave in the lateral leads. The Sokolow-Lyon criterion specifically uses the S wave amplitude in V1 plus the R wave amplitude in V5 or V6, and if that sum is 35 mm or greater, LVH is suggested. That matches the option described here: S in V1 plus R in V5/V6 ≥ 35 mm. The other patterns don’t reflect this exact pair or the same threshold, so they aren’t the Sokolow-Lyon measurement criterion.

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