Antihypertensive Agents Flashcards
ACE inhibitors
Captopril, enalapril enalaprilat perindopril
AT1receptor blocker (ARB)
Valsartan
Calcium channel blockers dihydropiridine
Nifedipine and amlodipine
Selective Alpha 1 adrenoreceptor antagonist
Doxazosin
Selective alpha 1 and non selective beta adrenoreceptor antagonist
Labetalol and carvedilol
Beta adrenoreceptor antagonist
2.metoprolol, bisoprolol 3-nebivolol
Selective central alpha 2 adrenoreceptor agonist
Methyldopa
Central alpha 2 and imidazolin I1 receptor agonists
Clonidine
Selective imidazolin I1 receptor agonists (SIRA)
Moxonidine
NO modulators
Sodium nitroprusside and glyceril trinitrate
Factors determining BP
CMV, Circulating blood volume,TPR
CMV=
SV *HR
SV is dependent on
Contractility,Preload and afterload
Major BP regulator system
ANS,RAAS,local chemicalediators I’m the endothelium
Vasomotor centre control
CMV and vascular tone
BP can be increased by
Increased Preload,afterload and CMV
Preload and afterload can be increased by
Stimulation of postsynaptic as alpha 1 adrenoreceptor
If drug induced reduction in vascular tone, compensatory mechanism is
Increase HR
If drug induced reduction in CMV, compensatory mechanism is
Vasoconstriction
——system is slower than ANS in regulation of BP
RAAS
RAAS system increase BP by
Vasoconstriction and increasing circulating blood volume
Activators of Renin
Decrease in blood pressure, decreased blood flow in renal, decreased na in distal tubules, sympathetic nervous system stimulation
Angiotensin in AT 1 receptor cause
Increase in ROS,Inc in SNS,Inc Vasoconstriction,Inc in synthesis of ADH and Inc in ventricular hypertrophy
Angiotensin 2 in AT2RECETOPR
Inc in NO,Inc in Na excretion,reduced endothelial hypoxic injury, decrease BP inhibits vascular growth