Silicon
Rationale:
Silcon has positive cardivascular effects. Also once I started drinking more beer (which is the highest and most bioavailable source of silicon you can get your hands on) nocturnal urination decreased considerably.
https://www.ncbi.nlm.nih.gov/pubmed/24839984
http://www.medhelp.org/posts/Success-Stories/Bad-Case-of-Varicose-Veins---Cured-with-Supplements/show/1407006
http://www.eidon.com/silicaresearch/
Maybe this interacts with Vitamin K https://badmaevtradition.com/sites/default/files/documents/MK-7%20And%20Cardiovascular%20Health.pdf
Copper
Rationale:
Copper has such wide ranging positive effects on the cardiovascular system that I'd be surprised if it didn't have some role.
http://wholehealthsource.blogspot.co.uk/2010/04/copper-and-cardiovascular-disease.html
http://www.karger.com/Article/PDF/000354523