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.
MEXICAN TEXAS. MEXICAN TEXAS. The Mexican war of independence (1810â21), one of the rebellions that erupted throughout Latin America to overthrow Spanish colonial rule, left Mexico with an array of problems that touched upon events in the far northern Mexican province of Texas.Economically, the country faced devastation in 1821.he Mexican war of independence (1810â21), one of the rebellions that erupted throughout Latin America to overthrow Spanish colonial rule, left Mexico with an array of problems that touched upon events in the far northern Mexican province of Texas. Economically, the country faced devastation in 1821.