Cardiac Health Problems
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Cardiac Health Problems: An Overview of Heart Diseases, Lecture notes of Pathophysiology
An overview of cardiac health problems, including coronary heart disease, angina pectoris, myocardial infarction, congestive heart failure, cardiac dysrhythmias, inflammatory diseases of the heart, and valvular heart disease. It defines key terms such as preload, afterload, ischemia, automaticity, and cardiac output. The document also discusses risk factors associated with cardiac health problems and includes questions for self-assessment, making it a valuable resource for understanding cardiac health. It also provides links to youtube videos for further study. Useful for medical students and healthcare professionals seeking to deepen their understanding of cardiac health issues and related conditions. It offers a concise yet informative overview of various cardiac diseases, their risk factors, and diagnostic methods, making it a valuable resource for both academic and clinical purposes.
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2024/2025
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Cardiac Health Problems
https://www.youtube.com/watch?v=7NOU4McjtXs
● William Harvey: In the 17th century, English physician William Harvey conducted extensive research and experiments on the cardiovascular system. Through his work, he accurately described the circulation of blood in the body. He demonstrated that the heart acts as a pump, propelling blood through a closed system of arteries and veins. Harvey's work was published in his landmark book "De Motu Cordis" (On the Motion of the Heart) in 1628, which laid the foundation for modern understanding of the cardiovascular system.
Definition Preview
preload
volume of blood returning to heart, creating "stretch" or tension of myocardial fibers at end diastole
angina pectoris
chest pain associated with anaerobic metabolism from decreased
oxygen supply to myocardium https://www.youtube.com/watch?v=-I-NN2PSAU
Ischemia https://www.youtube.com/shorts/9szAz2gkKj
insufficient blood flow leading to decreased oxygen supply to tissues causing anaerobic cellular metabolism rather than aerobic metabolism https://www.youtube.com/watch?v=C0BUPHYQ1h4&t=170s
Automaticity
ability of a cardiac muscle cell to contract independently, without normal stimulation
https://www.youtube.com/watch?v=6LrptveKYus&t=343s
Cardiac output
amount of blood pumped out of left
ventricle each minute;
determined by
Heart Rate x Stroke Volume
https://www.youtube.com /watch?v=vFRkSB46bl
Electrocardiogram (ECG or EKG)
graphic representation of electrical activity of heart
https://www.youtube.com/watch?v=ScZVGHDisa
Intermittent claudication
cramping in lower extremities, especially when walking or with exercise
https://www.youtube.com/watch?v=zU6JgZuqMmk&t=109s
Mitral valve prolapse
mitral valve opens backward toward atrium causing regurgitation of blood from ventricle to atrium
https://www.youtube.com/watch?v=Q84DwBABbY
Myocarditis
an inflammatory disorder of heart muscle that is unrelated to coronary artery disease or myocardial infarction
https://www.youtube.com/watch?v=SCwm5k8ULGk
Regurgitation
a condition in which blood flows backward through a valve that should be closed but cannot close completely because of damage or disease
https://www.youtube.com/watch?v=Q84DwBABbY
Stenosis
a condition in which valves of heart become hardened and blood does not flow through them adequately
https://www.youtube.com /watch?v=dip_4io2_4A