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).
Metoprolol a beta blocker with heart. Metoprolol is classified as a Beta blocker. Any beta blocker is going to work by blocking the action on the heart. Its main action is to slow the Heart rate down. It is used for high blood pressure and heart disease such as a Myocardial infarction (heart attack), angina or CHF.