There were other applications proposed in the early days of the. Internet, including packet based voice communication (the. precursor of Internet telephony), various models of file and disk. sharing, and early âwormâ programs that showed the concept of. agents (and, of course, viruses). A key concept of the Internet is.
View All. For a long time, normal blood pressure was defined as 120/80 mm Hg (systolic/diastolic). Recently, however, the American Heart Association revised its guidelines about what an optimal blood pressure range is, and when blood pressure is considered too high or too low. While 120/80 used to be considered normal, the new guidelines define three levels of abnormal blood pressure values. 120-139 / 80-89 is now considered to be âprehypertensionâ (or âalmost high blood pressure), and doctors are watching blood pressures in this range more carefully than in the past.
So, saying that someone has an âelevated pulse pressureâ is usually the same as saying that they have an âelevated systolic blood pressure,â which is already known to be an important clinical finding requiring treatment. A person with normal blood pressure (120/80) will have a pulse pressure of 40 (120-80). But that doesnât mean that a person with a pulse pressure of 40 has normal blood pressure. Clearly, a blood pressure of 140/100 is much different than 120/80.