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).
Common types of drugs used to treat heart failure include: 1  Aldosterone inhibitors. 2  Angiotensin converting enzyme (ACE) inhibitors. 3  Angiotensin II receptor blockers (ARBs).4  Angiotensin Receptor-Neprilysin Inhibitors (ARNIs). 5  Beta-blockers. 6  Blood vessel dilators. 7  Calcium channel blockers. 8  Digoxin.ommon types of drugs used to treat heart failure include: 1  Aldosterone inhibitors. 2  Angiotensin converting enzyme (ACE) inhibitors. 3  Angiotensin II receptor blockers (ARBs).