AA is generally the abbreviation for Associate of Arts degree. This is the degree given by many two-year colleges, often called Community Colleges (which used to be called Junior Colleges). Some also award the AS-- Associate in Science degree. Typically, an Associate's degree is the equivalent of a year, or in some cases a year and a half, of courses at a four-year college, and there are many students who transfer their Associate's degree credits so that they can complete a four-year degree.
Although it may seem difficult, lowering your breathing speed will help to lower your heart rate. Take a breath for 5-8 seconds, hold it for 3-5 seconds, and then exhale slowly for a count of 5-8 seconds.
If someone has been a chain-smoker in the past, it would take a lot of time to heal. It takes different time for different parts of body to cure. In 15 years, your risk of coronary heart disease and heart attack in similar to that of people who have never smoked. In 20 minutes, blood pressure and pulse rate decrease. In 24 hours, your risk of having a heart attack decreases.