Final answer:
The first human implantation of an artificial pacemaker occurred in the 1950s, which was a significant medical advancement.
Step-by-step explanation:
The first human had a pacemaker implanted in the 1950s. The invention of the artificial pacemaker was a significant milestone in medical technology, serving as a device that provides electrical signals to the heart to ensure it contracts and pumps blood effectively. This was amidst a period of remarkable medical advancements which included the development of antipsychotic drugs and the discovery of DNA's double-helix structure. Artificial pacemakers are implanted by cardiologists and can be programmed to deliver electrical impulses to the heart muscle either on demand or continuously. Some modern pacemakers are also equipped with sensors that adapt the heart rate in response to body motion and breathing, especially during exercise.