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 Mexican Cession was the result of a war caused by the Americans attempting to gain Mexico's land. The Treaty of Guadalupe Hidalgo marked the peace. It was in 1848 that the United States gained 500,000 square miles, increasing the size of the U.S by 25%. The Senate ratified the treaty in March of 1848. The states of California, Nevada, Colorado, New Mexico, Utah, most of Arizona were formed from this land.