A summarised booklet of all the cardiovascular lectures in second year veterinary medicine at the RVC. Each summary covers the learning objectives provided by lecturers in a clear and concise manner including helpful diagrams.
Preload →
pressure snatching cardiac muscle ↳ Ca moves in → more voltage
during timing .
cntdnnels ac
Frank starving law → energy of contraction of cardiac muscle 3 .
Depolarisation of K
↳
fibre initial fibre nest
↳ K moves out
relationship a
length at
.
.
between VEDV
→
increased ventricular end diastolic volume Ionic basis of ventricular action p
>
2
µ |g
- 0
e. sv .
↳ increased exposure of myosin heads .
Rapid depola
↳ force
increased one connection .
' '
Venous Return → rate of blood flow back to heart . 9 . Notch → d
4 4
↳ some
Factors -1
→
Affecting Venous Return : -
K
' '
^
Volume of blood 2 . Plateau
2. Distribution of blood ↳ slow inward current → L t
3. Gravity t movement ↳ outward K current .
4 . Venous tone (sympathetic nerve activity) 3 . Repatriation
Reflex Responses : ↳ inward channels deac
-
Hypervotdemird (4 blood volume ) ↳ outward K channel dom
↳ ' '
Arterial barovecepiov mlllex -
Depressor velvet Regulation of Heart Rate by Autonom
↳
decreases sympathetic outflow Parasympathetic : VAGUS NERVE → S
↳ outflow ↳ Acn
increases parasympathetic .
release ↳ at re
↳ ↳ opens fewer
Ariel receptors the channels -
slow
starting forces move fluid into capillary bed
Opposing .
xs fluid which is not reabsorbed →
lymphatic vessels back to Cvs .
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