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.
The Mexican Revolution (Spanish: Revolucion revoluciÃ³n) mexicana was a major armed struggle. caâ1910 20 that radically Transformed mexican politics and. societyis Liberation Army of the South (Ejercito EjÃ©rcito libertador Del) sur fought during The Mexican revolution for the redistribution of agricultural. Land zapata and his army and, allies Including Pancho, villa fought for agrarian reform In. mexico