An atrial septal defect (ASD) is an opening or hole in the wall that separates the two upper chambers of the heart.This wall is called the atrial septum. The hole causes oxygen-rich blood to leak from the left side of the heart to the right side.n atrial septal defect (ASD) is an opening or hole in the wall that separates the two upper chambers of the heart.
The Connecticut Compromise (also known as the Great Compromise of 1787 or Sherman's Compromise) was an agreement that large and small states reached during the Constitutional Convention of 1787 that in part defined the legislative structure and representation that each state would have under the United States Constitution.
Three-Fifths Compromise. The Three-Fifths Compromise was a compromise reached between delegates from southern states and those from northern states during the 1787 United States Constitutional Convention. The debate was over whether, and if so, how, slaves would be counted when determining a state's total population for legislative representation and taxing purposes.