ST Segment Elevation; ST Segment Depression . General Introduction to ST, T, and U wave abnormalities. Basic Concept: the specificity of ST-T and U wave abnormalities is provided more by the clinical circumstances in which the ECG changes are found than by the particular changes themselves. Thus the term, nonspecific ST-T wave abnormalities, is frequently used when the clinical data are not available to correlate with the ECG findings.
lutein â(usually uncountable, plural luteins) ( 1 organic chemistry) A yellow carotenoid pigment, widely distributed in both plants and animals. 2  E161b when used as a food colouring.  xanthophyll.
Lutein is a yellow plant pigment in the carotenoid family. Yellow and orange vegetables have only trace amounts of lutein; large amounts are found in green vegetables like broccoli, collard greens, kale, and spinach. Lutein is also available as a supplement made from marigold flowers.utein is a natural pigment of the carotenoid family. It is widely found in nature the lutein and its isomer zeaxanthin are the main xanthophylls in marigold flowers and also in vegetables and fruits.