Introduction. Beta-blockers, also known as beta-adrenoceptor blocking agents, are medications used to treat conditions such as angina, heart failure and high blood pressure. They decrease the activity of the heart by blocking the action of hormones like adrenaline.
1 The concept of âdemographic changeâ describes a populationâs age structure adjusting to. changes in living conditions. Consequently, changes in thcomposition of a societyâe s age. structure are the result of social shifts. (. 2  cf. . 3  theory of first and second demographic transition.
2056, the population 65 years and over is projected to. become larger than the population under 18 years. This report examines changes in the U.S. population. over the coming decades, with a focus on the baby. boom cohort and its future role in shaping the demo-. graphic composition of the United States.