Biomedical Engineering Reference
In-Depth Information
Figure 2.2-19 PHYSBE control panel.
Figure 2.2-22 PHYSBE Simulink model: heart volume.
2.2.7.1 Coarctation of the aorta
The affliction characterized by a short constriction of the
aorta is known as a
coarctation.
Such narrowing creates
a pressure difference whereby abnormally high blood
pressure exists before the point of coarctation, and ab-
normally low blood pressure exists after the point of
coarctation. Commonly, this narrowing is situated such
that there is a pressure differential between the upper
body and arms (high blood pressure) and the lower body
and legs (low blood pressure) (Suk, 2001).
Fig. 2.2-23
shows where a coarctation occurs.
The untreated consequences of coarctation of the
aorta are numerous and severe. Without repair, this
condition results in high mortality from complications
such as myocardial infarction, intracranial hemorrhage,
infective endocarditis, coronary artery disease, and aortic
rupture. There is a stunning mortality rate of 90% before
the age of 50 when this condition is left untreated.
Figure 2.2-20 PHYSBE Simulink model.
Figure 2.2-21 PHYSBE Simulink model: heart pressure.
Figure 2.2-23 Coarctation of the aorta, from Suk (2001).
