Calcium, Vitamin D & Vitamin K2
Vitamin K1: Phytonadione
Vitamin K2: Menaquinone (various forms, MK-n)
Randomised studies suggest that calcium supplements without coadministered vitamin D are associated with an increased incidence of myocardial infarction. 
One study indicates that intake of ordinary doses of vitamin D supplements seems to be associated with decreases in total mortality rates and the study's summary relative risk did not change according to the addition of calcium supplements in the intervention.
After extensive databases had been constructed for the vitamin K1- and vitamin K2-content of various food items, population-based studies were initiated to correlate vitamin K intake with cardiovascular disease. In a first survey, Geleijnse et al. demonstrated that vitamin K2 intake is inversely correlated with cardiovascular disease and mortality. Remarkably, no association was found with the intake of vitamin K1.
Long-chain menaquinones (MK-7 and higher) turned out to have the most beneficial effects on cardiovascular disease, with a mortality risk reduction of 9% for each 10 µg/day of extra intake.
MK-7 induced more complete carboxylation of osteocalcin, and hematologists should be aware that preparations supplying 50 ug/d or more of MK-7 may interfere with oral anticoagulant treatment in a clinically relevant way.
Note; There are two main types of blood thinners: 1) Anticoagulants, such as heparin or warfarin (also called Coumadin), work on chemical reactions in your body to lengthen the time it takes to form a blood clot. 2) Antiplatelet drugs, such as aspirin, prevent blood cells called platelets from clumping together to form a clot.
According do Dr. Stephen Sinatra, vitamin K2 can be administered with aspirin but not with Coumadin as it is a vitamin K2 antagonist. 
- Calcium should be combined with Vitamin D and Vitamin K2 (especially MK-7) to prevent CHD
- Care should be taken when dosing Vitamin K2 MK-7 when combined with an anticoagulant
- It seems possible to administer Vitamin K2 MK-7 together with baby aspirin according to Dr. Stephen Sinatra
- Effect of calcium supplements on risk of myocardial infarction and cardiovascular events: meta-analysis, BMJ 2010;341:c3691 doi:10.1136/bmj.c3691, http://www.bmj.com/content/bmj/341/bmj.c3691.full.pdf
- Vitamin D Supplementation and Total Mortality - A Meta-analysis of Randomized Controlled Trials, Arch Intern Med. 2007;167(16):1730-1737. doi:10.1001/archinte.167.16.1730, http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/413032
- Vitamin K: the effect on health beyond coagulation – an overview, Cees Vermeer, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3321262
- Dietary Intake of Menaquinone (Vitamin K2) Is Associated with a Reduced Risk of Coronary Heart Disease: The Rotterdam Study, http://jn.nutrition.org/content/134/11/3100.full.pdf
- Vitamin K–containing dietary supplements: comparison of synthetic vitamin K1 and natto-derived menaquinone-7, www.bloodjournal.org/content/bloodjournal/109/8/3279.full.pdf
- Blood Thinners - Also called: Anti-platelet drugs, Anticoagulants,https://medlineplus.gov/bloodthinners.html
- Supplements for Heart Health: What the Latest Science Means for You, Dr. Stephen Sinatra | https://www.drsinatra.com/supplements-for-heart-health-what-the-latest-science-means-for-you