18. Cardiovascular System: the Heart

Normal heart sounds and heart murmurs

Heart Physiology: Mechanical Events

Heart Sounds | S1 S2 S3 S4 

 Angina pectoris is not associated with specific heart sounds or murmurs. An incompetent cardiac valve produces a swishing sound on auscultation. 

 Cardiac tamponade often muffles cardiac sound so that no heart sounds can be heard. An incompetent cardiac valve produces a swishing sound on auscultation. 

 Many types of altered heart sounds can be associated with a myocardial infarction, but none are specific. An incompetent cardiac valve produces a swishing sound on auscultation. 

 A doctor puts his stethoscope on a patient's chest over the location of the heart and hears an abnormal swishing sound. Which of the following conditions is the best diagnosis for the patient's condition? 

Cardiac Cycle : volume changes

Cardiac Cycle - pressure changes

The Cardiac Cycle

 The first heart sound (the the “lup” of “lub-dup”) is generated by the closure of the atrioventricular valves. The second heart sound (the “dup”  sound) is caused by closure of the semilunar valves.  

 The second heart sound (the “dup” of “lub-dup”) is caused by the __________. 

Smart Art Video: Cardiac Cycle

Heart Sounds and Heart Murmurs

Auscultating Heart Sounds

Cardiac Cycle

 the changes in blood volume in all chambers of the heart 

 The cardiac cycle refers to the mechanical events occurring during one heartbeat. 

 the number of times the heart beats in one minute 

 the changes in pressure gradients in all chambers of the heart 

 the movement of impulse from the SA node to all regions of the heart wall 

 the closing and opening of the heart valves during each heartbeat 

 The cardiac cycle includes all of the following events EXCEPT __________. 

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1. Introduction to A&P

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14. Autonomic Nervous System

15. Special Senses

16. Endocrine System

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19. Cardiovascular System: Blood Vessels

20. Lymphatic System

21. Immune System

22. Respiratory System

23. Digestive System

24. Nutrition, Metabolism, Energy Balance

25. Urinary System

26. Fluid and Electrolyte Balance, Acid Base Balance

27. Reproductive System

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Excitation: Contraction Coupling

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Heart Physiology: Electrical Events

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Heart Anatomy: Pathway of Blood

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Heart Anatomy: Gross Anatomy

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Heart Anatomy: Microscopic Anatomy

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