It is the abnormal leaking of blood backwards from the left ventricle, through the mitral valve, into the left atrium, when the left ventricle contracts, i.e. there is regurgitation of blood back into the left atrium. MI is the most common form of valvular heart disease.t is the abnormal leaking of blood backwards from the left ventricle, through the mitral valve, into the left atrium, when the left ventricle contracts, i.e. there is regurgitation of blood back into the left atrium. MI is the most common form of valvular heart disease.
Illinois is the most populous of the states and North Dakota the least. A 2012 report from the United States Census put the population of the Midwest at 65,377,684. The Midwest is divided by the Census Bureau into two divisions. The East North Central Division includes Illinois, Indiana, Michigan, Ohio and Wisconsin, all of which are also part of the Great Lakes region.
The United States is composed of many regions, areas with a common physical or cultural aspect. While there is no official designations regarding which states do or do not fit within each region, there are some generally accepted guidelines. Also, one particular state may be part of several different regions. For instance, you can assign Kansas as a Midwestern state and just as easily call it a Central state, just as you could call Oregon a Pacific state, a Northwestern state, or a Western state. A List of the Various Regions of the United States. Atlantic States: The states that border the Atlantic Ocean from Maine in the north to Florida in the South. Does not include the states bordering the Gulf of Mexico, even though it is part of the Atlantic Ocean.