What are the differences between Altzeimers and Vascular Dementia?

I have been diagnosed with white matter ischemic disease and have found a scary correlation with the above conditions. Is there any way to slow down any of these conditions?
Thank you for your answers and God Bless You!

Well, vascular dementia is basically a series of small (and sometimes not so small) strokes that over time add up to cause an impairment of memory and function that qualifies as dementia. It can be prevented (or slowed) in all the same ways you can reduce your chances of having a stroke, low cholesterol diet, no smoking, basically whatever is good for the heart is good for the brain.
Alzheimer's disease is something else entirely, we're not sure exactly what causes it, nor exactly how to prevent it (apart from remaining active, which seems to help), the mechanism by which is causes dementia is different as well.

Do you mean Alzheimer's.

Dementia means lost of memory, for your case should be vascular caused due to loss of blood to the white matter of ur brain.

In laymans term, you would need to supply your brain with sufficient blood if not will cause the death of ur brain.
You would have to know what is blocking ur blood supply too, izzit thrombosis?

Anyway, there are commerical drugs out there for alzhemier all in the source link.

They are two different forms of dementia. Vascular dementia is caused by strokes. Alzheimer's is a complex of symptoms including plaque build-up on the neurons, neuron death due to plaque & tangles, tangles of dead neurons, and brain atrophy.
There are drugs to slow the symptoms of Alzheimer's but no cure yet.
Good luck.