In Sokolow-Lyon criteria for LVH, which combination of voltages defines LVH?

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Multiple Choice

In Sokolow-Lyon criteria for LVH, which combination of voltages defines LVH?

Voltage criteria for LVH on the ECG rely on a specific sum of voltages in particular leads. In Sokolow-Lyon LVH, LVH is present when the S wave in V1 plus the R wave in V5 or V6 adds up to more than 35 mm. This pattern reflects increased left ventricular mass: the left-sided leads (V5/V6) show a tall R wave, while V1 shows a deep S wave, and adding them together crosses the threshold. Therefore, the correct combination is S in V1 plus R in V5 or V6 greater than 35 mm. The other options don’t fit because they use the wrong lead for the S or R component or the wrong total voltage threshold for this criterion.

Voltage criteria for LVH on the ECG rely on a specific sum of voltages in particular leads. In Sokolow-Lyon LVH, LVH is present when the S wave in V1 plus the R wave in V5 or V6 adds up to more than 35 mm. This pattern reflects increased left ventricular mass: the left-sided leads (V5/V6) show a tall R wave, while V1 shows a deep S wave, and adding them together crosses the threshold. Therefore, the correct combination is S in V1 plus R in V5 or V6 greater than 35 mm. The other options don’t fit because they use the wrong lead for the S or R component or the wrong total voltage threshold for this criterion.

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