Indeed, in aortic stenosis, because of the fixed obstruction to blood flow out from the heart, it may be impossible for the heart to increase its output to offset peripheral vasodilation.A third mechanism may sometimes be operative. Due to the hypertrophy of the left ventricle in aortic stenosis, including the consequent inability of the coronary arteries to adequately supply blood to the myocardium (see "Angina" below), abnormal heart rhythms may develop. These can lead to syncope.Finally, in calcific aortic stenosis at least, the calcification in and around the aortic valve can progress and extend to involve the electrical conduction system of the heart. If that occurs, the result may be heart block, a potentially lethal condition of which syncope may be a symptom. Congestive heart failure
Congestive heart failure (CHF) carries a grave prognosis in people with AS. People with CHF attributable to AS have a 2-year mortality rate of 50% if the aortic valve is not replaced. CHF in the setting of AS is due to a combination of left ventricular hypertrophy with fibrosis, systolic dysfunction (a decrease in the ejection fraction) and diastolic dysfunction (elevated filling pressure of the LV). Associated symptoms
In Heydes syndrome, aortic stenosis is associated with gastrointestinal bleeding due to angiodysplasia of the colon. Recent research has shown that the stenosis causes a form of von Willebrand disease by breaking down its associated coagulation factor (factor VIII-associated antigen, also called von Willebrand factor), due to increased turbulence around the stenotic valve.
Other Ugandan doctors were seeking jobs in other countries leaving inadequate or less skilled doctors to stay in Uganda. Preventing overpopulation
Poverty and lack of access to birth control can lead to population increases that put pressure on local economies and access to resources, amplifying other economic inequality and creating increase poverty. Better education for both men and women, and more control of their lives, reduces population growth due to family planning. According to United Nations Population Fund (UNFPA), those who receive better education can earn money for their lives, thereby strengthening economic security. Increasing personal income
The following are strategies used or proposed to increase personal incomes among the poor. Raising farm incomes is described as the core of the antipoverty effort as three-quarters of the poor today are farmers. Estimates show that growth in the agricultural productivity of small farmers is, on average, at least twice as effective in benefiting the poorest half of a countrys population as growth generated in nonagricultural sectors. Income grants
A guaranteed minimum income ensures that every citizen will be able to purchase a desired level of basic needs. A basic income (or negative income tax) is a system of social security, that periodically provides each citizen, rich or poor, with a sum of money that is sufficient to live on. Studies of large cash-transfer programs in Ethiopia, Kenya, and Malawi show that the programs can be effective in increasing consumption, schooling, and nutrition, whether they are tied to such conditions or not.