The normal, healthy heart has its own pacemaker that regulates the rate that the heart beats. However, some hearts don't beat regularly. A pacemaker can sometimes correct the problem. A pacemaker is a small device that sends electrical impulses to the heart muscle to maintain a suitable heart rate and rhythm. A pacemaker may also be used to treat fainting spells (syncope), congestive heart failure, and hypertrophic cardiomyopathy.
The core of the treaty defined the Mexican Cession, the territory that Mexico was obliged to cede to the United States as a result of the war. The Mexican War was the culmination of a series of conflicts between Mexico and the United States.
The Treaty of Guadalupe Hidalgo brought a formal end to the war, and Mexico had to give up land rights. This came to be known as the Mexican Cession. The treaty transferred ownership of present-day California, New Mexico and Arizona and parts of Utah, Nevada and Colorado to the United States. In addition, Mexico relinquished its claim to Texas, and the agreement specified that the Rio Grande River would become the southern boundary of the United States.