Match the term coronary circulation with the most closely related descriptions given below: Vein to the left atrium Covers outer surface of the heart Supplies blood to heart muscle Lines inner surface of fibrous pericardium Slow heart rate Functional syncytium Muscular wall of the heart Relaxation phase of the cardiac cycle Vein to the right atrium Contraction phase of the cardiac cycle Introduction: The heart supplies blood to all parts of the body through two circulations—pulmonary and systemic. The systemic circulation ensures a supply of blood to all the body organs except the lungs. The pulmonary circulation takes place between the heart and the lungs. In this way, the blood is oxygenated and returns to the heart. There is another kind of blood circulation, known as coronary circulation.

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Chapter 21, Problem 4RFT

Summary Introduction

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Match the term coronary circulation with the most closely related descriptions given below:

Vein to the left atrium

Covers outer surface of the heart

Supplies blood to heart muscle

Lines inner surface of fibrous pericardium

Slow heart rate

Functional syncytium

Muscular wall of the heart

Relaxation phase of the cardiac cycle

Vein to the right atrium

Contraction phase of the cardiac cycle

Introduction:

The heart supplies blood to all parts of the body through two circulations—pulmonary and systemic. The systemic circulation ensures a supply of blood to all the body organs except the lungs. The pulmonary circulation takes place between the heart and the lungs. In this way, the blood is oxygenated and returns to the heart. There is another kind of blood circulation, known as coronary circulation.

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1) unoxygenated blood leaves the right ventricle via the .................. to get to the lungs?

(i)List the major blood vessels and their origins involved in coronary circulation.(ii) At what stage or phase of the heart’s activities does the heart tissues becomes perfused with oxygenated blood? (iii) Define myocardial infarction.(iv) Explain the typical signs associated with acute myocardial infarction. (v) Outline/State which arteries of the heart are most commonly affected/occluded.(vi) Explain why occlusions lead to infarct in the heart.

3. (1) List the major blood vessels and their origins involved in coronary circulation. (ii) At what stage or phase of the heart's activities does the heart tissues becomes perfused with oxygenated blood? (iii) Define myocardial infarction. (iv) Explain the typical signs associated with acute myocardial infarction. (v) Outline/State which arteries of the heart are most commonly affected/occluded. Page 1 of 2 (vi) Explain why occlusions lead to infarct in the heart. (vii) What is creatine phosphokinase (CPK) and why are elevated CPK levels in the blood suggestive of a myocardial infarction? (viii) What is cor pulmonale? (ix) Describe the main clinical findings (with cor pulmonale) on examination. Explain your answer.