1 This can happen when the arteries to the heart become thicker and harder from a buildup of plaque. 2  High blood pressure causes scarred arteries that fill up with plaque and become more prone to blood clots.
To commandeer is to take possession or control of something, or to take control of something for a military or law-enforcement purpose, or to make someone help you.
Definition of directive. : something that serves to direct, guide, and usually impel toward an action or goal; especially, government : an authoritative order or instrument issued by a high-level body or official a presidential directive.