" This definition provides a much clearer picture of the wide range of services encompassed in telemedicine. It seems that the pace of technology is so rapid that what may be new and innovative one day becomes routine the next day, and by the following week, is considered ineffective or outdated. This seems to be the case with terminology also. The term telemedicine has been replaced by the more inclusive term "telehealth". Thede (2002) describes telehealth as "the use of electronic communication networks to transmit data or information that focuses on health promotion, disease prevention, diagnosis, consultation, education, and/or therapy." The term telemedicine, however, continues to be used widely and interchangeably throughout the literature. .
Evolution of Telemedicine.
Telemedicine began approximately 50 years ago. The first mention of telemedicine in medical literature can be found in references to transmission of radiological images by telephone in 1948 (McCarty & Clancy, 2002). The early roots of telemedicine came from the manned space flight program where scientists sought methods to monitor, diagnose and treat astronauts. The modern-day portable cardiac monitor and defibrillator are a byproduct of that scientific research (Bahshur, Reardon & Shannon, 2000). .
In the 1980's, federal funds for demonstration projects were eliminated and telemedicine essentially disappeared from the scene (McCarty & Clancy, 2002). A rebirth of telemedicine occurred in the 1990's with the advancement of the Internet, and increased federal, state, and military support (McCarty & Clancy, 2002). In the past few years the development of telemedicine has increased significantly. Health care organizations have implemented numerous programs for clinical and non-clinical purposes (Jen-Hwa-Hu & Yam-Keung Chau, 1999). Most authorities agree the increasing innovations in computers, networks technologies and other equipment are responsible for the rebirth of telemedicine applications (Roine, Ohinmaa & Hailey, 2001).