please be patient] $\,\angle 1\,$ and $\,\angle 2\,$ are vertical angles, then $\,m\angle 1 = m\angle 2\ $. DEFINITION parallel lines. Two lines are parallel if and only if they lie in the same plane and do not intersect. Parallel lines are studied in more detail in a future section, Parallel Lines. The symbol â$\,\parallel\,$â is used to denote parallel lines.
Types of Rate Control Drugs. There are three types of rate control medications: 1  Beta Blockers, which slow the heart rate and relax the blood vessels. 2  Examples include Atenolol (Tenormin Â®), Carvedilol (Coregâ¢), Metoprolol (Toprol XLâ¢, Lopressor Â®), and Sotalol (Betapace Â®).
Citalopram is a widely prescribed antidepressant in the UK. Heart risk link to SSRI antidepressants confirmed, BBC News reports. The BBC goes on to say that some but not all antidepressant drugs known as SSRIs pose a very small but serious heart risk.italopram is a widely prescribed antidepressant in the UK. Heart risk link to SSRI antidepressants confirmed, BBC News reports. The BBC goes on to say that some but not all antidepressant drugs known as SSRIs pose a very small but serious heart risk.