Ischemia or ischaemia is a restriction in blood supply to tissues, causing a shortage of oxygen that is needed for cellular metabolism (to keep tissue alive). Ischemia is generally caused by problems with blood vessels, with resultant damage to or dysfunction of tissue.
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And the selection of devices to get those shows and movies from the Internet onto your TV continues to expand. In the last six months or so all of the major players in TV-based streaming -- Roku, Amazon, Google and Apple -- debuted brand-new gadgets. They also continue to sell older ones.