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).
â¢ Medicines, such as beta blockers or antiarrhythmics, to help return your heart rate to a normal rhythm. â¢ Medicines, such as digitalis, calcium channel. blockers or amiodarone to help slow your heart rate. â¢ Blood thinners to keep blood clots from forming.