Abstract
Renin-angiotensin system is one of the general regulatory mechanisms of blood pressure. The activity of the system depends on the rate of renin secretion, therefore, plasma renin activity (PRA) is one of the main variables that mediates the effect of a number of factors on blood pressure. Consequently, the impact of a particular drug on blood pressure disorders can be evaluated by the PRA changes. In clinical practice, the administered therapeutic dose is of critical nature, and a number of methods are known for its calculation. In the present study, applying bifurcation analysis the range of the administered doses of the nicardipine (antihypertensive drug) are determined. The bifurcation diagrams show how the stability of the renin-angiotensin system depends on the administered dose.
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