02.05 Hypertensive Vascular Disease Flashcards
Most important risk factor for coronary artery disease and stroke
Hypertension
Extent and velocity of shortening or force of contraction
Contractility
Prime determinant of arterial pressure over the long term
Intravascular volume (TPR)
Maintains pressure homeostasis via pressure, volume and chemoreceptor signals
Autonomic nervous system
Most potent vasoconstrictor
Angiotensin II
Most common cause of secondary hypertension
Renal disease
Due to obstruction of renal artery
Mechanism through activation of RAAS
Deterioration of renal function associated with an ACE-I/ARB/DRB
Renovascular hypertension
Surgery is the only definitive treatment
Primary aldosteronism
Most common congenital cardiovascular cause of hypertension
Coarctation of the aorta
First-line agent
Diuretics
Inhibit NaCl pump in the distal convoluted tubule (inc. na secretion, diuresis, dec. sv, dec. CO)
Hydrochlorothiazide
Very strong diuretic, usually reserved for renal insufficiency
Furosemide
Centrally acting sympathetic agonist
Useful for patients with autonomic neuropathy
Sympatholytic agents (clonidine, methyldopa)
Side effects include orthostatic HPN, somnolence, dry mouth, rebound HPN on withdrawal, secual dysfunction, myocarditis, thrombocytopenia, bradycardia, weakness
Sympatholytic agents
Blocks alpha-adrenergic receptors
Used for phreochromocytoma
Not been shown or proven to reduce CV events
Alpha-blockers (Terasozin)