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Heart

The heart is a major organ of the body that is found in the circulatory system. It pumps blood throughout the blood vessels. Questions related to the heart should be put here.

8,781 Questions

Why may a person's body reject a heart transplant?

The person's white blood cells would attack it and kill it because it thinks it is a foreign disease or foreign object, and tries to save the body.

From the left ventricle the blood enters which vessel?

The ventricle on the right side of your heart pumps blood from your heart to your lungs. After your body's organs and tissues have used the oxygen in your blood, the vena cavae carry the oxygen-poor blood back to the right atrium of your heart.

What is pharmacologic management of ventricular fibrillation?

Patients who experience ventricular fibrillation (which is disorganized electrical activity occuring within the lower chambers of the heart) are resuscitated via defibrillation. Defibrillation consists of an electric shock usually delivered via conductive pads or paddles. It essentially resets all the cells of the heart in hopes that when electrical activity resumes, it will be organized and able to pump blood.

Untreated, all ventricular fibrillation is fatal, and patients who are at known risk for experiencing this arrythmia can be provided with an implanted cardioverter defibrillator, or ICD. This is a device which is placed under the skin of the upper torso and connected to the heart with a wire. It contains a computer which will monitor the patient's heart at all times and deliver a shock if recognizes ventricular fibrillation or a related rhythm called ventricular tachycardia.

There are also certain drugs, such as amiodarone and lidocaine, which can be given to a patient at known risk for ventricular fibrillation in order to make it less likely. These drugs usually work by making the cell membranes of the cells of the heart more electrically stable. Many of the same drugs can also be given if defibrillation is initially unsuccessful in order to help make it more effective.

It should be noted that there is a very short window of time to treat ventricular fibrillation (permenant brain damage begins to occur approximately 4-6 minutes after the onset of the arrythmia), and the prognosis for these patients is generally very poor if they are not defibrillated immediately and transferred to a critical care setting.

Can coughing cause heart problems?

Coughing in and of itself does not cause a heart condition, but it may be a symptom of a heart condition. Lack of breath can sometimes be caused by a congestive heart, or other serious health problems. If you have a chronic, unexplained cough (e.g. not from a cold or choking) you should see your doctor.

Keep a one way flow through the heart?

It is important for blood to flow in one direction in the heart because blood can't flow backwards because it has oxygen rich blood and poor oxygen rich blood and these to types of blood cannot mix :)

Why can you feel your heart beat when you exercise?

Its because you have a thin frame, I have it too.

But if you find it strange, go to your doctor, there is possibility that you may have dilation of the major aorta.

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What is valve repair?

A valve job is where they turn or resurface the valves in your cylinder head to promote sealing. The head(s) have to come off & they grind the seats as well. The cam opens/closes the valves to let in fuel/let out exhaust.

What does the function of the heart valves?

Heart valves control the flow of blood into, out of, and within the chambers of the heart. The main function is to let blood flow in one direction only, ensuring that blood does not flow backwards.

What direction does the blood flow through the pulmonary artery?

What is the main pulmonary artery? * Arteries are vessels that carry blood away from the heart. The main pulmonary artery extends from the right ventricle and branches into left and right pulmonary arteries. The left and right pulmonary arteries extend to the left lung and right lung. Function: * Carries de-oxygenated blood from the right ventricle to the lungs. http://biology.about.com/library/organs/heart/blpulmartery.htm :D im doin biology toooo!!!

Which organ directly work with heart?

All of your organs are involved with the heart. The heart pumps blood to all the organs in your body.

What are the vessels that nourish the heart?

Veins take blood to the heart, arteries take blood away from the heart.
The vessels that carry blood to the heart are called veins. Those that supply the body with blood from the heart are called arteries.

Examples are the jugular veins that return blood from the head, and the carotid arteries that supply blood to the head.

What ideas is at the heart of the ricardian system?

Economic growth will sooner or later slow down or stop altogether

What carries blood to the heart and away in the body?

The left ventricle pumps blood into the aorta and that takes it out to the body

Does a heart disease have a medical treatment for it?

coronary heart disease is caused by a blocked artery or vein in your heart, mainly due to fat deposits. so if the disease is severe, it may result in a heart attack and a surgery is needed. for that, you can have 2 ways : one is the stent, where you insert a hollow pipe like structure into the blocked vessel, and push back the plaque. or, by the bypass surgery, where you replace the blocked vein with that of an extra vein, that is present in your lower leg. inn less severe cases, it can also be cured by medications like aspirin, etc.

Oxygenated blood returns to the heart through what vessels?

Right and left pulmonary veins into the left ventricle and out through the aorta.
Through the pulmonary vein - the only vein in the body to carry oxygenated blood.

How does the heart make blood circulate throughout the body?

It turns from oxygenated blood to deoxygenated blood.

The tissues absorb the oxygen that your red blood cells carry through diffusion through the capillary membranes. When the oxygen is gone, the blood is considered "deoxygenated."

What divides heart into to sides?

the wall that divides heart cavity down middle is... septum...this is the TRUE answer... I hope thi helped you=}.

How do you get a hole in your heart?

It depends on the size of the hole and whether it can repair on its own. Some people with these disorders don't need surgery but some do. The only way to know is to see a specialist. If one is cynotic (turning blue) or passing out or feeling faint these are not good signs. Wish you the best!

What is the amount of blood pushed out out of a ventricle with each contraction?

stroke volume (SV) is the volume of blood pumped from one ventricle of the heart with each beat. It is calculated by subtracting the volume of blood in the ventricle at the end of a beat (called end-systolic volume) from the volume of blood just prior to the beat (called end-diastolic volume). The term stroke volume applies equally to both left and right ventricles of the heart. These two stroke volumes are generally equal, both approximately 70 ml in a healthy 70-kg man.

Stroke volume is an important determinant of cardiac output, which is the product of stroke volume and heart rate. Because stroke volume decreases in certain conditions and disease states, stroke volume itself correlates with cardiac function.

What happens to the blood when the left ventricle contracts?

Contraction of the left ventricle results in the blood being pumped out into the Aorta (through the Aortic Valve) where it is then sent to all the body's arteries.

The mitral valve prevents blood flowing into the left atrium when the ventricle contracts.

What type of fluid is pericardial fluid?

it is called pericadial fluid and it is composed of lactate dehydrogenase (LDH), lymphocytes, and some protein.

What is Tricuspid valve stenosis?

usually doesn't require treatment. However, if there is damage to other valves in the heart as well, then surgical repair or replacement must be considered.

What are the fibrous structures in the heart that prevent prolapse of the cuspid valves?

Chordae tendineae - attached to the valves between both atria and ventricles... these structures are attached to papillary muscles in the bottom of the ventricles. these contract when the valves contract, this keeps the blood from going back up into the atria.

What is the same between the DNA in your brain cells to the DNA in your heart cells?

The DNA in brain cells and in heart cells are completely identical. Both types of cell come originally form stem cells, and therefore contain the exact same genetic material. The only difference between brain and heart cells is how they use that DNA code.