Congestive Heart Failure (Definition) 1  Congestive heart failure, otherwise known simply as heart failure, is a condition in which the heart muscle is weakened. 2  Angio: It's possible but very unlikely. 3  Heart failure is a complex set of conditions in which the heart fails to pump a normal amount of blood with each beat.
Chlamydia infection is the most common bacterial STI. In 2013, there were over 1.4 million cases of Chlamydia reported. According to the most recent estimates, 15â24 year-old females continue to have higher rates of Chlamydia than any other age-sex group.
Common STDs. Chlamydia. This most common bacterial STD is found in 20 to 40 percent of teens having sex outside of marriage. Up to 40 percent of all girls between the ages of 15 and 19 are infected -- the highest chlamydia infection rate of any age group.