Add selected constant from slicer to table

I need some help.  I work with medical data.  I have created a _ChooseOrgan table to select the appropriate Organ (Column=OrganChoices) (Heart, Lung, Kidney, etc).  Then I created a measure for the choice selected

SelectedOrgan = SELECTEDVALUE(_ChooseOrgan[OrganChoices])

We are in the process of restructuring our data.  But currently, I have a very wide table with separate columns for each organ and its respective data/metrics (Kidney Date, Kidney Value, Heart Date, Heart Value, etc).  What I want to do is pass the SelectedOrgan choice (a single value from the slicer) to the data table in a new column as a constant.  Then, I could create new columns in my data table based on a switch statement like this example

SelectedIntent = SWITCH(True(),
[Selected Organ]="Heart",v_Organ[HeartOrIntent],
[Selected Organ]="Liver",v_Organ[LiverOrIntent],
[Selected Organ]="Intestine",v_Organ[IntestineOrIntent],
BLANK())

But I cannot get the slicer choice in the data table.  Please, please give me a helpful tip!