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Aimee - nursing essay

nursing essay
Course

Nursing (NRSG139)

19 Documents
Students shared 19 documents in this course
Academic year: 2021/2022
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This document has been uploaded by a student, just like you, who decided to remain anonymous.
Central Queensland University

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Criteria 1 - Describe the normal anatomy and physiology of the coronary circulation. Link this to the respiratory system in providing oxygenation for the heart muscle cells.

Coronary circulation is a component of the circulatory system, this system distributes blood and provides drainage from the tissue of the heart (Marcus et al, 1990). The heart consists of two coronary arteries which occur within the aorta, within that region are the semilunar valves (Marcus et al, 1990). When diastole occurs, the enhanced aortic pressure on top of the valves pushes blood into the coronary arteries then onwards within the musculature of the heart (Marcus et al, 1990). Deoxygenated blood is then reverted to the chambers of the heart with the assistance of the coronary veins, the majority of these unite in the forming of the coronary venous sinus, which drains into the right artrium (Hoffman & Spaan, 1990). When air enters the lungs through the primary bronchi, the respiratory bronchi make their way to the alveoli (Hoffman & Spaan, 1990). The alveoli are in direct contact with capillaries of the circulatory system, Such intimate contact ensures that oxygen will diffuse from the alveoli into the blood (Hoffman & Spaan, 1990). This provides oxygenation for the heart muscle cells (Hoffman & Spaan, 1990). The anatomical arrangement of capillaries and alveoli emphasizes the structural and functional relationship of the respiratory and circulatory systems (Hoffman & Spaan, 1990).

Marcus, M, Chillian, W, Kanatsuka, H, Dellsperger, K, Eastham, C & Lamping, K. (1990). Understanding the coronary circulation through studies at the microvascular level. American Heart Association , 82 (1) , doi.org/10.1161/01.CIR.82.

Hoffman, J, & Spaan, J. (1990). Pressure-flow relations in coronary circulation. The American Physiological society , 70 (2) , doi.org/10.1152/physrev.1990.70.

Criteria 2 – Describe how atherosclerosis develops, including its risk factors. Discuss the lowered cardiac output after a heart attack, focussing on what this means for heart function.

Atherosclerosis is disorder where the arteries become narrowed and hardened due to the accumulation of plaque also known as fats within the artery wall (Falk, 2006). Atherosclerosis has a risk of developing due to a unhealthy lifestyle, medical conditions, or genes, are all contributing factors (Falk, 2006). Atherosclerosis can occur in any artery within the body but it is most detrimental when it leads to a reduced or blocked blood supply to the heart or to the brain (Falk, 2006). If a blocked blood supply occurs in one of the two main coronary arteries that supply blood to the heart, this results in a heart attack (Falk, 2006). The Reduced cardiac output is a severe medical condition that arises when the heart does not pump enough blood to meet the needs of the body (Falk, 2006). This means for heart function that if the body is not getting enough blood and oxygen to perform normal metabolic functions it can lead to serious health issues, including cardiac failure (Author, 1967). Cardiac failure is a disorder where the heart muscle is damaged and as a result it can no longer pump as adequately as it is required (Author, 1967). The ventricles which are the primary pumping chambers of the heart can change size and thickness, and neither can contract or can’t relax as good as they are required (Author, 1967).

Falk, E. (2006). Pathogenesis of Atherosclerosis, Journal of the American college of cardiology , 47 (8) , doi.org/10.3161/01PSL.52.

Author, C, & Guyton, D. (1967). Regulation of Cardiac Output, The New England Journal of Medicine, 6 (1) , DOI: 10/NEJM

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Aimee - nursing essay

Course: Nursing (NRSG139)

19 Documents
Students shared 19 documents in this course

University: Central Queensland University

Was this document helpful?
Criteria 1 - Describe the normal anatomy and physiology of the coronary circulation. Link
this to the respiratory system in providing oxygenation for the heart muscle cells.
Coronary circulation is a component of the circulatory system, this system distributes blood
and provides drainage from the tissue of the heart (Marcus et al, 1990). The heart consists of
two coronary arteries which occur within the aorta, within that region are the semilunar
valves (Marcus et al, 1990). When diastole occurs, the enhanced aortic pressure on top of the
valves pushes blood into the coronary arteries then onwards within the musculature of the
heart (Marcus et al, 1990). Deoxygenated blood is then reverted to the chambers of the heart
with the assistance of the coronary veins, the majority of these unite in the forming of the
coronary venous sinus, which drains into the right artrium (Hoffman & Spaan, 1990). When
air enters the lungs through the primary bronchi, the respiratory bronchi make their way to
the alveoli (Hoffman & Spaan, 1990). The alveoli are in direct contact with capillaries of the
circulatory system, Such intimate contact ensures that oxygen will diffuse from the alveoli
into the blood (Hoffman & Spaan, 1990). This provides oxygenation for the heart muscle
cells (Hoffman & Spaan, 1990). The anatomical arrangement of capillaries and alveoli
emphasizes the structural and functional relationship of the respiratory and circulatory
systems (Hoffman & Spaan, 1990).
Marcus, M, Chillian, W, Kanatsuka, H, Dellsperger, K, Eastham, C & Lamping, K. (1990).
Understanding the coronary circulation through studies at the microvascular level. American
Heart Association, 82 (1), doi.org/10.1161/01.CIR.82.1.1
Hoffman, J, & Spaan, J. (1990). Pressure-flow relations in coronary circulation. The
American Physiological society, 70 (2), doi.org/10.1152/physrev.1990.70.2.331

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