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Physiology
Test 2 High Yield
61
Physiology
Graduate
02/12/2009

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Term
sinus tachycardia
Definition
shorter R-R interval; due to fever, hyperthyroidism, and sympathetic stimulation
Term
sinus bradycardia
Definition
R-R intervals are much loner; vagal stimulation
Term
SA Block
Definition
Cessation of P waves and leads to sinus arrest
Term
sinus arrest
Definition
no p waves, slower rate because of av nodes fires less than SA
Term
abnormal pacemaker on L
Definition
p wave inverted, rate depends on how fast pacemaker is firing
Term
2:1 2nd degree heart block
Definition
2 p waves prior to 1 QRS complex
Term
3:1 2nd degree heart block
Definition
3 paves prior to 1 QRS complex
Term
stoke adams syndrome
Definition
fainting during 3rd degree heart block
Term
ectopic
Definition
ischemia, calcification of myocardium, toxins, drugs, caffeine and nicotine are all causes of this pacemaker
Term
bigeminal pulse
Definition
2 pulses are close together because heart beats are two times closer to each other
Term
pulse deficit
Definition
deficit in # of radial pulses felt in comparison to the # of actual contractoins
Term
premature atrial contraction
Definition
inverted p wave, RR inverals shorten after first 2 normal waves
Term
premature ventricular contraction
Definition
deadly "No P waves" lareger amplitude of QRS complex due to MI or ischemia and may go through fibrillation
Term
Paroxysmal Tachycardia
Definition
events that appear quickly and disappear quickly and can be more dangerous than PVC
Term
atrial
Definition
in this type of tachycardia, there are distorted p waves
Term
ventricular
Definition
in this type of tachycardia there are no p waves and signs of premature beats
Term
atrial flutter
Definition
multiple # of p waves preceeding 1 normal QRS complex
Term
atrial fibrillation
Definition
distorted p wave preceeding normal QRS complex
Term
ventricular fibrillation
Definition
in this type of fibrillation, it is very life threatening and there is no blood in or out
Term
hemodynamics
Definition
complication with blood is every portion of body; requires different flow at different times
Term
65%
Definition
what is the total percentage of blood in the venous system
Term
MABP
Definition
this is responsible for pushing blood into the arterial system ; =1/3 systole+ 2/3 diastole or diastolic + 1/3 (Psystole- Pdiastole)
Term
turbulent, laminar
Definition
this type of blood flow occurs when Reynolds number is > 2000; <2000?
Term
hematocrit
Definition
% of blood consisted in cells in men it is 42% and in women it is 38%
Term
increase
Definition
if a person who suddenly develops emboli the more pathways close, what will happen to the resistance
Term
conductance
Definition
how much fluid will pass through; if you increase the diameter of the tube you increase the _____ by the power of 4
Term
continuous flow
Definition
if you smomoth out blood flow through the vasculature system, you change the pulsatile flow into??
Term
parasympathetics; sympathetics
Definition
this system has no effect on the vasculature system while this system does
Term
delayed compliance
Definition
if there is an initial increase in volume and pressure but then a gradual decrease in pressuredue to intrinisic behavior this is referred to as"
Term
diastolic
Definition
we are more concerned with a drastic decrease in what type of blood pressure because it needs to be able to get blood to the organs
Term
pulse pressure
Definition
the difference between systole and diastole (120-80= 40)
Term
systolic
Definition
this pressure increases when stroke volume and vascular elasticity increase
Term
diastolic
Definition
this pressure decreases by a a decrease in total peripheral resistance, HR, and SV
Term
arteriosclerosus
Definition
this occurs when there is a los of arterial compliance; increase in pulse pressure, systolic pressure; diastolic pressure can decrease or it can remain the same
Term
patent ductus arteriosus
Definition
blood circulates between the lung and the left ventricle and causes a decrease in diastolic pressure in this condition
Term
aortic regurgitation
Definition
in this condition, diastolic pressure decreases and is associated with the water hammer pulse
Term
pulses paradoxus
Definition
this occurs in the respiratory system and the pulse decreases instead of increases due to cardiac tamponade
Term
weak pulse
Definition
this type of pulse is due to an increase in vascular spasm
Term
water hammer pulse
Definition
this is a high pulse then a no pulse sequence and is seen in patients with aortic regurgitation
Term
increase
Definition
if you have more Na+ there will be more volume retained which will do what to blood pressure
Term
circulatory filling pressure
Definition
a decrease in this leads to less venous return
Term
angiotensin
Definition
used to treat a decrease in blood pressure but not effective enough to restore it
Term
hydrostatic pressure
Definition
this type of pressure can decrease vasculature P and BP but increase the volume in the interstitial space leading to edema
Term
oncontic force
Definition
this force is due to leg protein molecules in cells which will hold H20 inside the cell
Term
volume loading HT
Definition
this type of hypertension is defined as an incerase in BP & Co which leades to renal failure; Aldosterone--> increases Na+--> which increases absorption-->increases BP & V
Term
vasoconstructive HT
Definition
this tyep of hypertension is due to an increase in peripheral resistance and the most common is essential hypertension
Term
peripheral circulation
Definition
centrally controlled by CNS; locally control of blood flow in certain areas
Term
smooth muscle
Definition
no troponin and fast Na+ channels so it needs lots of Ca++; Ca++ becomes available from ECF and sarcoplasmic reticulum
Term
pharmacomechanical coupling
Definition
major excitiation-contraction coupling of vascular smooth muscle; initiated by AcH, serotonin, adenosisne, NO, CO2, K+, H+ and prostaglandin
Term
auto-regulation
Definition
form of local blood flow control; blood flow remains constant in spite of variable perfusion pressures
Term
myogenic mechanism
Definition
increase in perfusion pressure, strecthes muscle and it contracts blood
Term
shear stress
Definition
NO gets released and controls blood flow
Term
tissue hypercapnia
Definition
incraese in CO2 which causes the need to increase bloood flow and wash out extra CO2
Term
active hypermia
Definition
increase in blood flow with the increase in tissue activity mediated by K+ phosphate
Term
reactive hypermia
Definition
increase blood flow, in response to occluded area
Term
barrow receptors
Definition
detect high and low pressure in the body
Term
chemo receptors
Definition
detect O2 and CO@ levels in the body to regulate pH
Term
sympathetic vasoconstriction
Definition
constriction everywhere;constriction of veins changes volume no P
Term
vasomotor center
Definition
located in the pons (lower 3rd) and upper medulla
Term
transplanted heart
Definition
can increase HR by SA node firing due to adrenaline from the adrenal medulla
Term
Higher arterial pressure
Definition
in ____ ____ ___ there is an increase in filtration, and as BP increases renal output also increase
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