Hypertension Flashcards
Exam 1/ Ch 30 Cardiovascular (224 cards)
What is the most frequently encountered health issue in primary care?
Hypertension
Hypertension is also known as ….
high blood pressure
If left untreated hypertension can lead to what health conditions?
stroke, heart attack, kidney failure or death
What do the latest guidelines from the American College of Cardiology and the American Heart Association recommend to maintain the blood pressure below for everyone?
130/ 80 mm Hg
For patients whose bp exceeds the target of 130/80 mm Hg what do the guidelines advocate for?
treatment with medication and lifestyle changes
Any factor that increases peripheral vascular resistance, HR or SV raises what?
systemic arterial pressure
Any factor that decreases peripheral vascular resistance, HR, or SV lowers what?
systemic arterial pressure
What can result when systemic arterial pressure is lowered?
reduced tissue perfusion
What are the 4 major control systems in regulating bp?
-the arterial baroreceptor system
-regulation of body fluid volume
-the renin-angiotensin- aldosterone system
-vascular auto-regulation
Where are the arterial baroreceptors located?
the carotid sinus, aorta, and the left ventricle wall
What do the arterial baroreceptors monitor?
arterial pressure and counteract increases in it
The reason baroreceptor control fails in hypertension?
is not well understood
What changes impact systemic arterial pressure?
fluid volume changes
If the kidneys function properly an increase in systemic arterial pressure leads to what?
diuresis or excessive urination and a subsequent decrease in pressure
The kidneys produce what?
renin
What does renin transform angiotensinogen into?
angiotensin II
Angiotensin II is a potent what?
vasoconstrictor
Angiotensin II regulates the release of what?
aldosterone
Aldosterone acts on the kidneys to reabsorb what?
sodium
Sodium retention in the kidneys prevents what? increases what?
fluid loss; blood volume and blood pressure
Normally, when BP is high, renin levels should decrease… however in most individuals with essential hypertension what happens?
Renin levels remain normal
What maintains relatively constant tissue perfusion?
vascular auto-regulation
Although auto-regulation maintains relatively constant tissue perfusion what role does it play in essential hypertension?
causes it, and reasons are unknown how this system operates
What 4 categories is BP classified?
normal, elevated/ prehypertension, stage 1 or stage 2
all categories can be essential or primary or secondary