The Sokolow-Lyon criterion for LVH uses a threshold of what value?

Prepare for the Cleveland Clinic EKG Test with flashcards and multiple choice questions. Gain insights with hints and explanations. Ace your exam today!

Multiple Choice

The Sokolow-Lyon criterion for LVH uses a threshold of what value?

The Sokolow-Lyon criterion for LVH is based on ventricular voltage; it looks at the combined voltage from specific precordial leads. Specifically, you take the S wave in V1 (or V2) and add it to the R wave in V5 (or V6). If that sum reaches about 3.5 mV, which on standard ECG paper corresponds to 35 mm, LVH is suggested. So the threshold is 3.5 mV (often expressed as 35 mm on the tracing), which is why the option equivalent to that value is the correct one in this set.

The Sokolow-Lyon criterion for LVH is based on ventricular voltage; it looks at the combined voltage from specific precordial leads. Specifically, you take the S wave in V1 (or V2) and add it to the R wave in V5 (or V6). If that sum reaches about 3.5 mV, which on standard ECG paper corresponds to 35 mm, LVH is suggested. So the threshold is 3.5 mV (often expressed as 35 mm on the tracing), which is why the option equivalent to that value is the correct one in this set.

More practice questions