Hypertension Flashcards
What are the BP ranges for the three stages of hypertension?
Stage 1: 140-159/90’s
Stage 2: 160-179/100-109
Stage 3: =>180/110
What is the JNC 8 recommendation for those aged over 60?
Treat if over 150/90 (either sys or dia) with a goal to be below those numbers.
What is the JNC 8 recommendation for those aged below 60?
Treat a systolic above 140. (expert opinion)
What are the four major types of antihypertensives?
Diuretics
Beta-blockers
ACE-I/ARB
CCBs
Which of the four major types of antihypertensives is slightly less effective than the rest?
Beta-blocker
What describes a substance that promotes the excretion of urine?
Diuretic
What describes a substance that promotes the renal excretion of Na+?
Natriuretic
What is the site of action for osmotic diuretics?
Proximal tubule and thin descending limb of Henle
What is the site of action for Carbonic anhydrase inhibitors?
Proximal tubule
What is the site of action for Thiazides?
Distal convoluted tubule
What is the site of action for loop diuretics?
Thick ascending limb of Henle
What is the site of action for Na+ channel blockers and spironolactone?
Cortical collecting duct
What is the MOA for Thiazide diuretics?
Inhibits Na+ and Cl- transporter in distal convoluted tubules.
Increases excretion of Na+, Cl-, K+, Mg2+
Decrease Ca2+ excretion
How are thiazides administered and absorbed?
Orally, poorly absorbed
How long is the onset of action for thiazides and what is their t1/2?
1-2 hours (BP effects take several days)
Wide range of t1/2 for different thiazides (generally longer than diuretics)