Chapter 19 Flashcards
"God is within her, she will not fall; God will help her at the break of the day."
What factors cause Bradycardia?
Calcium Channel Blockers
Increase Potassium Levels
Fitness
Lower Body Temp
Factor that cause Tachycardia are:
Stimulant: Caffeine, Norepinephrine/ Epinephrine
Hormones: T3/T4
Electrolytes: Increased Ca2+ Levels
Physiological: Age, Higher Body Temp
What are the events of the Cardiac Cycle?
Ventricular filling, Isovolumetric Contraction, Ventricular Ejection, Isovolumetric Relaxation.
What disease occurs when ventricles fail to eject blood effectively?
Congestive Heart Failure
What is the Cardiac Output
Cardiac Output: Amount ejected by each ventricle in a minute
What is Cardiac Reserve
The difference between the Max CO and Resting CO.
What increases the rate of Depolarization?
Norepinephrine to Beta 1 receptors
What is the impact of the Vagus Nerve( CN X)
Releases acetylcholine, which decreases the rate of depolarization.
What are the agents called that induce Tachycardia
Positive Chrontoropic/ Isotropic Agents.
What variables affect BP?
CO, Blood Volume, Resistance to flow
3 variables of resistance to flow
Blood viscosity and Volume, Length of Vessel, Vessel Radius
Where are the body’s baroreceptors located?
Aortic Arch and Carotid Sinus
What is the function of the baroreceptors?
Neural, send info to Medulla
What does the medulla in terms of BP?
Control respiratory and heart rates, control Co2 levels
Which types of vein contains valves?
Medium Veins
