You probably have mixed up Vitamin K and Potassium:
http://www.livestrong.com/article/345280-potassium-vitamin-k-clotting/
Another article...
http://www.livestrong.com/article/479974-benefit-of-potassium-on-heart-function/
Quote from the above article:
èRecommended Intake
To experience the heart-healthy benefits of potassium intake, adults should consume at least 2,000 mg of potassium per day. However, you may benefit from taking in more potassium if you have a heart condition like high blood pressure i.e. it lowers blood pressure.
Sodium (NaCl sodium chloride) increases blood pressure. Those with high blood pressure are advised not to eat too SALTY food, and use KCl as substitute.
