Pneumococcal infections are caused by Streptococcus pneumoniae, a gram-positive, catalase-negative organism commonly referred to as pneumococcus.
Blood pressure is a measure of the changing fluid pressure within the circulatory system. It varies. from a peak pressure produced by contraction of the left ventricle, to a low pressure, which is. maintained by closure of the aortic valve and elastic recoil of the arterial system. The peak.
Low blood pressure is good in most cases. But low blood pressure can sometimes... Read more. Hypotension is low blood pressure. Your blood pushes against your arteries with each heartbeat. And the pushing of the blood against the artery walls is called blood pressure. Low blood pressure is good in most cases. But low blood pressure can sometimes make you feel tired or dizzy. In those cases, hypotension can be a sign of an underlying condition that should be treated. Blood pressure is measured when your heart beats, and in the periods of rest between heartbeats.