Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats.It is measured by the variation in the beat-to-beat interval.Other terms used include: cycle length variability, RR variability (where R is a point corresponding to the peak of the QRS complex of the ECG wave; and RR is the interval between successive Rs), and heart period variability.ariation in the beat-to-beat interval is a physiological phenomenon. The SA node receives several different inputs and the instantaneous heart rate or RR interval and its variation are the results of these inputs. The main inputs are the sympathetic and the parasympathetic nervous system (PSNS) and humoral factors.
A:Pell grant is a federal grant that is given on need basis to the financially deserving students. Pell grant application process is a simple one that begins with Free Application for Federal Student Aid (FAFSA) form that has to be filled. The form is available online.
The deciding factor in Pell Grant eligibility is accreditation. Pell Grants will only be awarded to students at accredited universities or colleges. Students must also be working toward a bachelorâs degree; Pell Grants are not available for online masters or doctoral programs, even if they are accredited.rants and scholarships are obviously preferable to loans if you are going to seek financial aid. You do not need to pay these monies back, and you can use them for a variety of educational purposes including tuition, books, and living expenses. However, not all grants or scholarships are available at all schools.