You might look up the symptoms on a website like www.vitamindcouncil.com AND eMedicine
http://emedicine.medscape.com/article/767260-overview. You will see a lot of cardiovascular effects listed!
Most informed docs, internal medicine, pediatrician, endocrinology, rheumatology, (for women, gynecologist), all know that to treat a severe Vit D deficiency -- the gold standard treatment is 50,000 iu/week, not 2,000 iu/day. But other chemistry must be taken into consideration.