Definitions Flashcards
What is primary hypertension?
Essential hypertension, affects 93% of adults causes unknown contributing factors are environmental and genetic
Idiopathic no identification causes,
What is secondary hypertension?
Secondary to aortic artery stiffing with age 5% of all hypertension causes identified
What are the types of secondary hypertension?
Chronic kidney disease, renovascular, hypertension, hypothyroidism, hyper parathyroidism (elevated calcium), pheochromocytoma , sleep, apnea primary aldosteronism (hypok)
What does blood pressure depend on?
Strength of the heart pump blood
Resistance of blood vessels
Total volume of blood
BP=
Cardiac output CO x peripheral resistance PVR
Where are beta-1 receptors and what do they do?
In the heart and kidneys
Regulate heart rate, and contractility impacts CO
Blocking, beta-1, receptors, cause decreased cardiac output and PR
This reduces blood pressure
What do alpha-1 receptors do?
During the arterials and venules produce vasoconstriction
What do beta two receptors do
Cause vasodilation
Where are baroreceptors and what do they do?
Aortic arch in carotids
They since changes in blood pressure and signal brain for blood vessels, constrict
Increase his heart rate in contractility increases blood pressure
RAAS REGULATES?
Sodium, potassium, and fluid balance in the body
What is renin?
Produced by the kidneys. Is released in response to changes in blood pressure caused by reduce renal perfusion.
What does renin convert?
Angiotensin to angiotensin one
What is angiotensin one converted to
Oh, it is converted to angiotensin two by a converting enzyme ace
What does angiotensin two do
Vasoconstrict
Increases blood pressure
Release of aldosterone from the renal gland
What does aldosterone do?
Retention of sodium and water