Practical 4 Heart function Flashcards
Heart rate horse
30-40/min
heart rate cattle
60-80/min
heart rate small ruminants
60-80/min
heart rate swine
60-80/min
heart rate dog large size
70-100/min
heart rate dog new born
150-200/min
heart rate cat adult
120-160/min
heart rate cat new born
200-250/min
heart rate rabbit
150-200/min
heart rate poultry
140-400/min
What is pulse pressure?
the pressure in arterial system)
Pulse pressure in humans?
40 mmHg / 5.3 kPa
Normal Diastolic pressure in humans?
75-80 mmHg / 10.0-11.0 kPa
Why does edema happend with Ringer’s solution?
Protein free solution pass unhindered trough blood vessel walls to interstices
What is the effect of pharmacological consentrations of epinephrine? And which receptors does it influence?
Vasoconstriction all over body, trough α1 adrenergic receptors)
Equation for effective filtration pressure?
Peff = Pheff – Poeff
Equation for flow rate in the capillaries?
Q = Peff x CFC)
Factors of the diffusion rate?
conc. gradient and transit time of substance, and permability and diffusion area
Method of measuring blood pressure?
Indirect, by auscultatory method, or by digital method
How to determind diastolic pressure?
dissapperance of the tapping sound when releasing the cuff pressure
ISF, what does it depend on?
blood pressure, hydrostatic pressure, oncotic pressure and tissue turgor
Myogen, is it dependent on the CNS?
(Independent)
What happens when you get a local hypoxia?
metatrioles contract due to increased hydrostatic pressure
Is pulse pressure age dependent? Why?
Yes, because systolic increase and diastolic decrease by age
Equation for mean arterial pressure?
Pavarage = (Psystolic + 2xPdiastolic) / 3
How to measure systolic pressure?
First sound when releasing pressure in cuff
How to measure blood pressure by ausculatory method?
by using the Riva-Rocci sphygmomanometer
Effect of prolonged perfusion with ringer’s solution?
oedema
What blood cell type is mainly in mural flow?
white
What effect does verapamil have on the heart muscle
cat+ channels blocked
describe a normal p wave
atrial contraction
list the 4 main effects of epinephrine
chronotropic
bathmotropic
bromotropic
inotropic
what enzyme does strophantine-G inhibit
Na+/K+ atpase
what effect does strophantine- g on the stimulus conduction in the AV node
negative dromotropic effect
what type of channels does verapamil block
ca+
lead 2
right arm and left leg
lead 1
right arm and left arm
lead 3
left arm and left leg
what type of adrenoreceptors does propranolol inhibit
B1 and B2
