Network protocols that use aggressive retransmissions to compensate for packet loss due to congestion can increase congestion, even after the initial load has been reduced to a level that would not normally have induced network congestion. Such networks exhibit two stable states under the same level of load.
Beta blocker. Beta blocker, also written Î²-blocker, is a class of medications that are particularly used to manage cardiac arrhythmias, and to protect the heart from a second heart attack (myocardial infarction) after a first heart attack (secondary prevention).
Alteplase (Activase, tPA) or tenecteplase (TNKase) are examples of clot busting medications that may be used in peripheral arteries to try to restore blood supply. Heart attack: The same approach for heart attack is used as for arterial blood clots.