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PMSC12004 - Advanced Electrophysiology And Coronary Care Study Set Exam
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PMSC12004 - AdvancedElectrophysiology And Coronary Care
Study Set Exam
Anatomical Location of Heart - Answer thoracic cavity, medially between lungs called
mediastinum
heart is seperated by from mediastinal structures by pericardium
dorsal surface lies near vertebrate
anterior surface deep into sternum and coastal cartilage
aorta and pulmonary trunk are attached to superior surface
Composition of heart - Answer Endocardium
Myocardium
Epicardium
Endocardium - Answer innermost layer contains purkinje fibers which transmits action
potential
lines inner surfaces of heart chambers including heart valves
2 layers- inner layer: lines heart chambers made of endothelial cells. second layer:
subendocardial connective tissue, continuous with connective tissue of myocardium
Myocardium - Answer muscle layer made of cardiomyocytes correlates to contractile
function. made up in walls of all four chambers. thicker in ventricles & thinner in atria.
Main function is facilitate contraction & relaxation of heart walls to relieve & pump blood
into systemic circulation. Myocardial cells provide scaffold for heart chambers &
conduct electrical stimuli
Epicardium - Answer outermost layer, visceral layer of serious pericardium which
protects heart, provides signal from embryonic heart formation and maturation,
secretes factors for cardiomyocyte proliferation and survival, helps with heart injury
response and regeneration
Blood flow heart to lungs - Answer Blood flows into right atrium from Superior & Inferior
Vena Cava. Right ventricle receives blood from right atrium through tricuspid valve.
high to low pressure gradient moves blood to pulmonary trunk. Pulmonary trunk
branches into left and right pulmonary arteries that take blood to lungs.
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