When the depth of the S wave in lead V1 or V2 plus the height of the R wave in lead V5 or V6 is 35 mm or greater, this constitutes voltage criteria for which type of hypertrophy?

The indication of voltage criteria for left ventricular hypertrophy (LVH) is based on the measurement of the S wave in leads V1 or V2 combined with the R wave in leads V5 or V6. Specifically, when the depth of the S wave in either V1 or V2 plus the height of the R wave in V5 or V6 is equal to or greater than 35 mm, this suggests the presence of LVH.

This assessment stems from the physiological adaptations of the heart in response to various stressors or conditions, such as hypertension or aortic stenosis, which can cause the left ventricle to increase in size and thickness. The changes in the electrical vector can be captured effectively through the 12-lead electrocardiogram (ECG) by measuring these specific amplitudes.

On the other hand, right ventricular hypertrophy (RVH) would typically be identified by different criteria and would not result in this specific measurement pattern. Therefore, the combination of the specific leads and the numerical threshold directly correlates with left ventricular hypertrophy, making this the correct identification in the context of the question.