NSG 322 - Med Surg Exam 5 Study Guide.
NSG 322 - Med Surg Exam 5 Study Guide/NSG 322 - Med Surg Exam 5 Study Guide.
Chapter 32 – Hypertension
Direct relationship between hypertension and cardiovascular disease
•	Affects 33% of adults in U.S.
•	Additional 30% have prehypertension
•	High priority health concern identified in Healthy People 2020
Factors Influencing BP: Blood pressure = cardiac output x systemic vascular resistance o Sympathetic nervous system (SNS)
o Activation increases HR and cardiac contractility, vasoconstriction, renin increases CO and SVR o Baroreceptors: sensitive to stretching; send impulses to sympathetic vasomotor center; carotids,
o Vascular Endothelium: produces vasoactive substances to maintain low arterial tone o Endocrine System:
Epinephrine and norepinephrine from adrenal medulla Aldosterone from adrenal cortex
ADH from posterior pituitary