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Baroreceptor activity affects coronary vascular resistance reflexly. With carotid occlusion, baroreceptor hypotension leads to reflex adrenergic stimulation, increased metabolic activity and secondary vasodilation. When this is prevented by beta blockade, reflex coronary vasoconstriction secondary to carotid hypotension is unmasked. Alpha1 adrenoreceptor stimulation is capable of causing epicardial vasoconstriction in ischaemic myocardium, thereby influencing favourably the transmural distribution of blood flow to the subendocardium during exercise. Activation of chemoreceptors initially causes coronary dilation, a reflex that is mediated by vagi and can be abolished by atropine e.g. Bezold Jarisch reflex.
Pulmonary Valvotomy on Cardio Pulmonary Bypass and use of Cardioplegia : Single aortic cannulation and separate SVC and IVC cannulation arc done. The cavae are snared to
Explain the Food Security? You were introduced to the concept of food security in Unit 2. Food security, we learnt, is access by all people at all times to enough food for an a
Explain Transposition with VSD and Pulmonary Stenosis ? In the early years Rastelli and le Compte operations had 20 to 30 per cent mortality. This has been reduced to 5 per c
explain five kingdoms?
put the following events in the most probable order. A. Dead algae decomposed by bacteria B.excess nitrate and phosphate discharge into rivers C. Fish die of suffocation D.bacteria
what is animal kingdom and what are its functions
What are the valves of the venous system? What is their function? The valves of the venous system are structures within the veins that permit blood to flow only in the normal w
In how many parts Classification of Hydrocolloids Hydrocolloids, based on their solubility, thickening and gelling properties in water, are categorized into two main classes.
Q. What is Streatorrhoea? Streatorrhoea is more common in Crohn's disease due to heal resection. This may favour calcium-fatty acid complex formation and increased excretion. I
Q. What is Atherosclerosis? Atherosclerosis is an arterial lesion characterized by patchy thickening of the intima (innermost coal of artery) comprising of fat and layers of co
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