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matter of the heart definition, matter of the heart meaning | English dictionary. matter. 2 substance that occupies space and has mass, as distinguished from substance that is mental, spiritual, etc. n the substance or main theme of a book, discussion, debate, etc.
Definition. It is the pressure that is exerted on the walls of the various arteries around the body in between heart beats when the heart is relaxed. It measures the amount of pressure that blood exerts on arteries and vessels while the heart is beating.