Itamar Medical Ltd.
Endo
PAT
TM
x Device
60
Operation Manual
Figure 47 - AI calculation
Lower AI values (including negative results) reflect better arterial elasticity. AI is usually
increasing with age, and is higher in female. The AI section in the report includes the AI
result relative to large gender matched non-selective population.
Figure 48 – AI result from the report (female example)
7.6.2
Heart rate variability (HRV)
Heart rate variability (HRV) is a measure of heart beat to beat variability in either time or
frequency domain. HRV reflects the status of the autonomic nervous system (ANS) and
particularly the balance between sympathetic and parasympathetic activities. Low HRV has
been described as related to various pathological conditions.
The EndoPAT™ HRV is calculated from the baseline period, based on the European Society
of Cardiology and the North American Society of Pacing Electrophysiology task force
standard. It requires 5.5 complete minutes of base line, and includes all the time and
frequency domain that can be calculated from this short (5minutes) time period. Results are
