Cardiovascular Pharmacology Concepts

Richard E. Klabunde, Ph.D.

Tutorial - Pharmacologic Treatment of Arterial Hypertension

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Pathophysiology of Arterial (Systemic) Hypertension

1. What is hypertension?  click here

2. What is the difference between essential and secondary hypertension?  click here

3. What are several different causes of secondary hypertension?  click here

4. How do changes in cardiac output and systemic vascular resistance influence mean arterial pressure?  click here

5. How do changes in blood volume affect arterial pressure?  click here

6. What are systolic and diastolic aortic pressures?  click here

7. What factors determine central venous pressure?  click here

8. How do autonomic nerves regulate arterial pressure?  click here

9. How do arterial baroreceptors regulate arterial pressure?   click here

10. What roles do the following humoral factors play in the regulation of arterial pressure?
        a.    angiotensin II
        b.    aldosterone
        c.    vasopressin (antidiuretic hormone)
        d.    atrial natriuretic peptide

11. How do each of the following cause hypertension?  click here
        a.    renal artery stenosis

        b.    chronic renal disease

        c.    primary hyperaldosteronism

        d.    stress

        e.    sleep apnea

        f.     hyper- or hypothyroidism

        g.    pheochromocytoma

        h.    preeclampsia

        i.     aortic coarctation

Antihypertensive Drugs

1. How do drugs that dilate blood vessels, reduce blood volume, or reduce cardiac output lead to a decrease in arterial pressure?  click here

2. How do diuretics decrease blood volume?  click here

3. What are the differences between thiazide, loop, and potassium-sparing diuretics in terms of their site of action in the kidney and their overall efficacy in lowering blood pressure?  click here

4. By what mechanisms do each of the following mechanistic classes of drugs lower arterial pressure? What specific drugs (generic names) are FDA-approved in each of these classes?
       -  alpha-adrenoceptor antagonists (alpha-blockers)
       -  angiotensin converting enzyme inhibitors (ACE inhibitors)
       -  angiotensin receptor blockers (ARBs)
       -  beta-blockers
       -  centrally acting sympatholytics
       -  calcium-channel blockers
       -  direct acting arterial dilators
       -  ganglionic blockers
       -  nitrodilators
       -  potassium-channel openers

5. From the above list of drugs, which ones can cause orthostatic hypotension and reflex tachycardia?
    

 Revised 08/29/06 

DISCLAIMER: These materials are for educational purposes only, and are not a source of medical decision-making advice.

© 2005-2008Ed  Richard E. Klabunde, all rights reserved.