MEDSCI 142
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| show | -high pressure -away from heart -small outlets
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| Veins in circuit | show 🗑
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| show | -connect two capillary beds -hepatic
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| show | -bring oxygen to organs via aorta -high pressure & resistance -1pump=5L/min at rest
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| Pulmonary circuit | show 🗑
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| show | appendage increasing volume of atrium
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| oxgen in heart | show 🗑
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| Flow of blood around the body | show 🗑
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| Ventricular inlet valves | show 🗑
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| Ventricular outlet valves | show 🗑
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| show | *double-walled bag that heart is enclosed in *visceral &parietal
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| show | *innerwall adheres to heart*forms outer space=epicardium
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| show | *tough fibrous outer wall
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| Pericardium space | show 🗑
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| show | *maintains size of openings *electrical insulator
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| Conduction system step 1 | show 🗑
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| conduction system step 2 | show 🗑
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| Conduction system step 3 | show 🗑
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| Elastic artery | show 🗑
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| elastic artery during diastole | show 🗑
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| elastic artery systole | show 🗑
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| Muscular artery | show 🗑
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| Arteriole | show 🗑
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| Capillary | show 🗑
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| Venule | show 🗑
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| vein | show 🗑
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| Atrial contraction | show 🗑
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| show | *ventricle contracts and causes pressure inside to rise *first beat *inlet & outlet closed
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| Ventricular ejection | show 🗑
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| Isovolumetric ventricular Relaxation | show 🗑
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| Cardiac cycle | show 🗑
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| show | *arise from aorta *supply myocardium *small muscular *critical-supply heart with blood
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| what is the name for the disease where the blood runs low on oxygen? | show 🗑
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| show | Angina
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| Infarction? | show 🗑
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| show | -cardiac muscle
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| show | *mitral valves don't close properly *due to stretching of fibrous rings *blood flows back into atrium
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| show | *unkwown cause *muscles weak & slow to contract *mostly LV-high BP *LV dilates *ratio still 3:1 LV:RV *fibrous ring stretches *mitral valve no longer meets
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| show | *LA pressure rises due to regurgitation *hissing noise of heart beats dues to back flow
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| show | *dyspnoea
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| show | *pressure in atrium rises-rise in capillary P-leaky capillaries-water logged lungs-difficulty breathing(dysponoea)
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| mitral regurgitation effects on system | show 🗑
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| Viscous cycle | show 🗑
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| show | Heart rate (Beats per time) X Stroke Volume (volume ejected each contraction)
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| Cardiac Output | show 🗑
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| Cardiac reserve | show 🗑
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| show | Volume of blood returning to heart per minute (vol/min)
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| Stroke volume | show 🗑
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| show | the more the heart is filled during diastole the greater the force of contraction in systole
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| show | *3 factors *pre-load *contraction *afterload
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| show | *stretch of heart *myocardium's response to stretch *more stretch=more force *starlings law
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| show | *strength of individual muscle contractions at any given preload *effected by inotropic agents
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| show | Inotropic agent
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| show | -SV incr -constant preload -promote Ca2+ influx -strengthens F of next contraction -
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| -ve inotropic agent | show 🗑
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| Afterload | show 🗑
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| show | *critical in maintaining C.O & BP *rhythmic palpitations *controlled by excitatory signals within heart
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| show | *heart continues to beat when removed from body
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| show | (1) sino Atrial Node (2)AV node (3)AV bundle (4)R&L bundle branches (5) purkinje fibres
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| Purkinje Fibres | show 🗑
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| refractory period | show 🗑
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| show | electrocardiogram
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| show | -APs generated detected at bodies surface -composite record of AP from all fibres during beat
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| show | -combined AP of all areas of heart -gives measurable parameters
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| show | *atrial depol *large=damage to aorta, large atria
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| QRS wave | show 🗑
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| T wave | show 🗑
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| show | *parasympathetic *sympathetic
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| show | *vagus *slows HR *incr vagal nerve action *slows depol
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| show | *norepinephrine released from SA node *B-receptors activate-speed up depol. *incr HR *incr ca entry *incr contractions *incr SV
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| Blood Pressure | show 🗑
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| Diffusion | show 🗑
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| Arterioles & BP | show 🗑
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| show | filtration + reabsorption
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| show | (1)blood hydrostatic pressure- P of water in plasma on cap. walls
(2)Interstitial fluid osmotic pressure- small, tiny amount s of protein in interstitial fluid
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| show | *driving force of exchange in capillary beds -Bp high=filtration -Bp low=absorption
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| show | (1) blood colloid osmotic pressure- large components not freely filtered
(2)interstitial fluid hydrostatic pressure- opposed blood hydrostatic pressure
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| BP during systole | show 🗑
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| BP during Diastole | show 🗑
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| show | roughly 1/3 between diastole & systole P
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| BP= | show 🗑
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| show | -total peripheral resistance -effected by: *R small changes cause big changes in TPR *viscosity *blood vessel length
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| show | *high-dehydrated=polycytemia
*low-anaemia=haemorrhage
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