Dr. Stephen Kopecky, a cardiologist at Mayo Clinic, answers this question: Does aspirin help prevent stroke and heart attacks? This interview originally aired Sept. 15, 2018.
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Preventing heart disease is simple according to National Jewish Health Cardiologist Andrew Freeman, MD. Get his top four ways to prevent heart disease.
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TransMedics’ proprietary Organ Care System (OCS) is the first commercial and portable warm blood perfusion organ transport system. With the OCS, doctors are able to perform “living organ transplants,” where organs are kept warm and functioning in a controlled environment from the time they are recovered to the moment they are placed in the recipient’s body.
The human heart beats up to 3 billion times over an average lifespan. Learn about the anatomy of the heart and how this muscular organ provides life-giving oxygen throughout the body.
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Heart 101 | National Geographic
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Connect with a specialist: http://bit.ly/2zlWc5s
The Heart Center at Nationwide Children’s: http://bit.ly/2zm1qyg
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The anatomy of Hypoplastic Left Heart Syndrome (HLHS): http://bit.ly/2zoOcR4
The Heart Center at Nationwide Children’s Hospital is dedicated to the education of patients and families who require cardiac care. Learning how an anatomically sound or normal heart works can help families understand the more uncommon heart diagnoses children may have.
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Heartbeat and Pulse | Physiology | Biology | FuseSchool
Ever wonder what causes the thump-thump sound of your heartbeat?
It’s all to do with the valves. The sound of your heart beating can be attributed to your valves closing, and always in specific pairs.
Separating the atria from the ventricles are the tricuspid and bicuspid valves.The pulmonary valve and the aortic valve ensure that deoxygenated and oxygenated blood, respectively, leave the heart entirely without any backflow. This beautiful system sees that both the tricuspid and bicuspid valve are closed when the ventricles, both left and right, contract – this contraction forces blood out of the heart, through the pulmonary arteries and aorta.
The first thump that you can feel is the sound of the tricuspid and bicuspid valves closing simultaneously.
So during systole (the first half of your heartbeat) the tricuspid and bicuspid valves are closed, but the pulmonary and aortic valves are open. Once the ventricles relax, the pulmonary and aortic valves close, causing the second thump of a heartbeat. When the pulmonary and aortic valves are closed, the tricuspid and bicuspid valves automatically open.
During diastole, blood (both oxygenated and deoxygenated) fills into the heart.
The average heart rate for a young adult varies, depending on age, physical size, genetics, and activity. It is usually in the range of 60 – 100 heartbeats per minute. The fitter you are, the lower your resting heart rate is likely to be. An athlete may have a resting heart rate closer to 40 beats a minute.
After each heartbeat, a pressure wave passes along your arteries, which causes your arterial walls to bulge, and then contract. These pulses, as they are called, can be felt at various points throughout your body. A strong pulse can be felt at the top of your neck.
Although you cannot quantitatively measure the force of your pulse, you can do so for the overall force exerted against arterial walls by your blood – this is called blood pressure.
Usually your blood pressure is given as two numbers. These numbers represent the forces exerted during systole and diastole, known as systolic pressure and diastolic pressure. The systolic pressure is quoted before the diastolic.
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Get to know your body’s most important muscle — your heart — and learn how to take your own pulse!
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http://www.nhlbi.nih.gov/health/health-topics/topics/hhw/contraction
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Virus Life Cycle | Health | Biology | FuseSchool
In this video we are going to look at what happens when a virus invades a host cell. You should already have an understanding of what viruses are. If you want an introduction to viruses, watch this video first: https://youtu.be/rWkNvIUthBI
CREDITS
Animation & Design: Jean-Pierre Louw (behance.net/Jean-Pierre_Louw)
Narration: Reshenda Wakefield
Script: William Haines
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A heart attack happens when there is a sudden loss of blood flow to part of your heart muscle. It’s often believed a heart attack will cause you to collapse, but this is not always the case. The animation explains what a heart attack is, how it can be treated, and lifestyle changes that can reduce the risk of having another heart attack.
For more information visit: bhf.org.uk/heartattack
View this video to see the heart in 3D animation. We explain the basics and examine how the human heart works.
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Dr. Gregory Nicholson from Midwest Orthopaedics at Rush and Steve Kashul discuss an article concerning how often sports injuries occur. Dr. Nicholson specializes in shoulder and elbow surgery, utilizing state-of-the-art arthroscopic and open surgical techniques to treat sports-related, traumatic, arthritic, and … Continue reading →
035 – Viral Replication
Paul Andersen explains how viruses reproduce using the lytic cycle. He also shows how viruses can pick up new genetic material and how retroviruses (like HIV) can enter into the lytic cycle. He also describes the lysogenic cycle and how it increases the virulence of bacteria.
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nimal Cell Clip Art, n.d. http://www.clker.com/clipart-animal-cell.html.
Cartoon Virus Clip Art, n.d. http://www.clker.com/clipart-cartoon-virus.html.
DNA, n.d. http://openclipart.org/detail/58543/dna-by-kumar35885.
“File:Adult Cholera Patient.jpg.” Wikipedia, the Free Encyclopedia. Accessed December 8, 2013. http://en.wikipedia.org/wiki/File:Adult_cholera_patient.jpg.
“File:Cholera Bacteria SEM.jpg.” Wikipedia, the Free Encyclopedia. Accessed December 8, 2013. http://en.wikipedia.org/wiki/File:Cholera_bacteria_SEM.jpg.
“File:Illu Conducting Passages.svg.” Wikipedia, the Free Encyclopedia. Accessed December 8, 2013. http://en.wikipedia.org/wiki/File:Illu_conducting_passages.svg.
“File:Phage2.JPG.” Wikipedia, the Free Encyclopedia. Accessed December 8, 2013. http://en.wikipedia.org/wiki/File:Phage2.JPG.
“File:PhageExterior.svg.” Wikipedia, the Free Encyclopedia. Accessed December 8, 2013. http://en.wikipedia.org/wiki/File:PhageExterior.svg.
“File:Rhinovirus.PNG.” Wikipedia, the Free Encyclopedia. Accessed December 8, 2013. http://en.wikipedia.org/wiki/File:Rhinovirus.PNG.
Germ 4c, n.d. http://openclipart.org/detail/28434/germ-4c-by-j_alves.
Martin, David. Portrait of Benjamin Franklin. Oil on canvas on panel, 1767. The White House Historical Association. http://commons.wikimedia.org/wiki/File:Benjamin_Franklin_1767.jpg.
Raul654, Translated by. Hiv Gross, [object HTMLTableCellElement]. Originally from GFDL image Image:Hiv gross german.png. http://commons.wikimedia.org/wiki/File:Hiv_gross.png.
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Heart rate monitors work similarly to EKGs in that they measure the electrical activity produced by the heart. Find out how the leads on a heart rate monitor pick up electrical activity with information from a cardiologist in this free video on cardiology and the heart.
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