The pacemaker may have one to three leads, depending on the type of pacemaker needed to treat your heart problem. There are different types of pacemakers: Single-chamber pacemakers use one lead in the upper chamber (atria) or lower chamber (ventricles) of the right side of the heart.
The MexicanâAmerican War, also known as the Mexican War, the U.S.âMexican War or the Invasion of Mexico, was an armed conflict between the United States of America and the United Mexican States from 1846 to 1848.
Painting of a Mexican-American War battle âThe Warâ â From a Mexican Viewpoint When asked about the Mexican American War; most Americans would probably give a lost and questioning reaction. Most American historians would call this war as âThe Mexican-American Warâ, while Mexicans would refer it as âThe U.S Invasionâ. The difference in referral is based on the different perceptions of the conflict.