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).
Mentioned in? 1  acebutolol. 2  Adams-Stokes syndrome. 3  arrhythmia. 4  atrial fibrillation. 5  atrioventricular block. 6  beta blocker. 7  beta-adrenergic blocker. 8  beta-adrenergic blocking agent. 9  beta-blocking agent. 10  bradycardia. 11  Brevibloc. 12  cantering rhythm. 13  cardiopathy. 14  digitalin. 15  digitalis. 16  digitalis glycoside. 17  digitoxin. 18  digoxin. 19  esmolol.