Ablation, also known as catheter ablation, is a treatment that aims to control or correct certain types of abnormal heart rhythms. It uses either heat (radiofrequency ablation) or freezing (cryoablation) on the area of your heart thatâs causing the abnormal heart rhythm (or arrhythmia). This treatment creates scar tissue which: breaks abnormal circuits in the heart; destroys areas of the heart muscle which are triggering arrhythmias.
Medical Definition of RHODOPSIN. : a red photosensitive pigment in the retinal rods of marine fishes and most higher vertebrates that is important in vision in dim light, is quickly bleached by light to a mixture of opsin and retinal, and is regenerated in the darkâcalled also visual purple. a red photosensitive pigment in the retinal rods of the eye of most vertebrates that is important in vision in dim light âcalled also visual purple. ADVERTISEMENT.
visual pigment Photosensitive pigment contained in the outer segments of both rods and cones. The chemical composition of the pigment in both cells is almost the same, there is only a slight difference in the protein opsin. The pigment in the rods is called rhodopsin.