Angioscan Electronics AngioScan-01, User Manual, Page: 45 / 119

AngioScan Medical Tests 41
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and is used as a symptom of adverse changes when ED exhibits atypical values.
4.1.4.12 %ED - Ejection Duration percent
The ejection duration percent (%ED) is the duration of the systole expressed as a percentage of the
duration of the cardiac cycle
.
This parameter determines the ratio of the duration of the systole and the
diastole in the cardiac cycle. The duration of the systole in healthy individuals should not exceed 40% of
the total duration of the cardiac cycle. The heart muscle is supplied with blood mainly during diastole. If
the duration of systole is increased significantly, it can lead to poor perfusion of the myocardium, which
is a risk factor of heart muscle damage.
4.1.4.13 PD - Pulse Duration
The duration of the pulse wave is determined from the start of the pulse wave until its end. The duration
of the pulse wave corresponds to the pulse rate. The importance of this parameter is described in heart
rate .
4.1.4.14 T1 - Time to 1st Peak
T1 is the time interval from the beginning of the pulse wave to the peak of the early systolic wave (or, the
direct wave).
The parameter does not have an independent diagnostic value. The parameter is used for
the calculation of time intervals.
4.1.4.15 T2 - Time to 2nd Peak
T2 is the time interval from the beginning of the pulse wave to the peak of the late systolic (or, the
reflected) wave. The parameter is used in calculations of the augmentation index.