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).
In treating heart disease, ACE inhibitors are usually used with other medications. A typical treatment plan often includes an ACE inhibitor, a beta blocker, a long-acting nitrate, and a calcium channel blocker, in combinations that are adjusted to the individual patient's needs. There are fixed-dose combination drugs, such as ACE inhibitor and thiazide combinations.