Angioscan Electronics AngioScan-01, User Manual, Page: 57 / 119

AngioScan Medical Tests 53
© 2014 AngioScan-Electronics LLC
6. To start data recording, click "Record". The duration of the data collection in a pharmacological test is
not limited and can be defined by the operator performing the test.
7. To end the test, click "Stop". Click "Save" to save the test results in the patient database.
4.3.3 Pharmacological test limitations
When conducting a pharmacological test, it is important to visually monitor the pulse waves for the
presence of cardiac arrhythmias. If any significant arrhythmias are present, the heart rate variability
estimate can be unreliable.
An example of test data of a patient with severe arrhythmia.
4.3.4 Pharmacological test results
Pharmacological test index by pulse wave amplitude
Contour analysis results
4.3.4.1 Pharmacological test index by pulse wave amplitude
This parameter is the ratio of the average amplitude of the pulse waves in the time interval after
pharmacological stimulus (the pink area on the pharmacological test graph) to the average amplitude of
the signal in the time interval before the pharmacological stimulus (the blue area on the pharmacological
test graph).
4.3.4.2 Contour analysis results
At the end of a pharmacological test, two sets of contour analysis parameters are computed and
displayed. The first set consists of average values for the time interval before the pharmacological
stimulus (the pink area on the pharmacological test graph), and the second set consist of the average
values for the time interval after the pharmacological stimulus (the blue area on the pharmacological test
graph). By comparing these sets of parameters, one can observe the impact of the pharmacological
stimulus.
The values of these sets of parameters are displayed either as absolute values or as differences between
the two sets (i.e., before and after a pharmacological stimulus).