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Doctor insights on: Normal Function Of The Heart

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What is the function of heart valve?

What is the function of heart valve?

To direct flow: A heart valve functions to allow unidirectional blood flow. When chambers of the heart contract, one heart valve will open and one will close; this effectively allows only one low resistance pathway for the blood to follow. If there were no valves, blood would flow backwards from where it just came as well as forwards. This would significantly decrease the effectiveness of the heart as a pump. ...Read more

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What is the structure and function of the heart valve?

What is the structure and function of the heart valve?

Leaflets, flow cont.: Heart valves are made of fibrous tissues that are supported in the case of tricuspid and mitral valves with muscles and apparatus that work as a unit. These generally work as check valves, allowing the flow of blood in one direction only and not backwards. ...Read more

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What is the normal pressure values of the heart?

What is the normal pressure values of the heart?

All in mm of mercury: Right atrium: 2.2 l/min/m². Pressure difference across the aortic valve: 0. Pressure difference across the mitral valve: 0. ...Read more

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What is the normal pacemaker of the heart?

What is the normal pacemaker of the heart?

The sinus node: The sinus node is a group of specialized pacemaker cells that is located in the upper right atrium. These cells react to circulating chemicals, such as adrenaline, and there are nerve connections from the brain that modify the heart rate in response to the body's needs. ...Read more

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What is the function of cardiac muscle?

What is the function of cardiac muscle?

Myocardium: Its function is to rhythmically shorten and then relax so as to provide motive force to pump blood through the vascular system. ...Read more

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What is the function of cardiac muscle?

What is the function of cardiac muscle?

Pump blood: The heart muscle relaxes, and the chamber gets bigger and fills up with blood. The heart muscles squeezes and pumps blood out. (Valved in the heart make sure everything goes forward.) ...Read more

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What part of the heart maintains the beating?

What part of the heart maintains the beating?

Electrical System: The heart has an electrical system that starts the heart beating and coordinates the different parts of the heart to maintain the beating. When this is disrupted it can lead to problems. ...Read more

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What is the function of the bicuspid valve in the heart?

What is the function of the bicuspid valve in the heart?

You mean malfunction: The aortic valve has 3 parts or leaflets. When its called bicuspid it has only 2 leaflets. This can be congenital or aquired. If two of the cusps fuse over time is called functional bicuspid vs congenital. Either way it creates an un natural flow across the valve and over time damage the valve. Most often the valve will need replace depending on age diagnosed.Most congen bicuspids will need repla. ...Read more

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What is the structure and function of myocardium?

What is the structure and function of myocardium?

Heart muscle: Myocardium (heart muscle) is made up of cardiomyocytes. The function is pumping blood. ...Read more

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What is the function of ventricles and coronary arteries?

What is the function of ventricles and coronary arteries?

Heart pump and lube: Ventricles deliver blood to the lungs and rest of your body. Coronaries are the heart vessels that supply oxygen to the heart. ...Read more

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Dr. Gutti Rao Dr. Rao
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Describe the structure and function of myocardium and endocardium.?

Dr. Gutti Rao Dr. Rao
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Describe the structure and function of myocardium and endocardium.?

Endocardium: Endocardium: inner lining of the heart. Heart valves are made up of endocardium. Myocardium: thick muscle mass in the middle of the heart. Function: electrical conductivity and contractility of the heart pericardium or epicardium: outer protective fibrous layer. ...Read more

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Why is the difference between volume flow and rate of flow in pulmonary function test?

Why is the difference between volume flow and rate of flow in pulmonary function test?

PFTs...: In pulmonary function testing, volume flow refers to how much air is inhaled or exhaled whereas the rate of flow tests how fast the air is inhaled or exhaled. ...Read more

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What is the function of pericardium?

Pericardium: We probably don't realize the complete function of pericardium but among others -- we know that pericardium plays a major role in the hemodynamics of the organs -- in this case the heart and the lungs, the fluid exchange and the intrathoracic pressure regulation pertaining to that internal organs -- ad mechanical protection to the heart against trauma, infection, and metastasis --. ...Read more

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What is the function of the pulmonary valve?

What is the function of the pulmonary valve?

Flow direction: Pulmonic valve like all other heart valves, directs the flow from one chamber to another, in this case from the right ventricle to the lungs. It allows the flow to be organized and the timing of flow to be proper. ...Read more

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What is the function of pacemakers?

What is the function of pacemakers?

Devices for rhythm: Pacemakers are medical devices implanted under the skin and connected to leads inserted through veins into the chambers of the heart. By sending out a small electrical impulse the pacemaker can restore heart rhythm. The most common use for a pacemaker is for a very slow heart beat to restore rhythm. They may be either single or double lead pacemakers determined by patient need. ...Read more

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What is the relation of hypertension and decreased cardiac output?

What is the relation of hypertension and decreased cardiac output?

Complicated.: It is an indirect relationship. Hypertension over time can lead to changes in the heart muscle and heart function. It may eventually lead to heart failure. When this ensues the output of the heart can eventually decline and cause serious symptoms. In the earlier stages if hypertension cardiac output actually goes up. ...Read more

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What area of the brain has the greatest effect on visceral functions (e.g. heart rate and hormone production)?

What area of the brain has the greatest effect on visceral functions (e.g. heart rate and hormone production)?

Hormones: Please go online to Yahoo Images or something similar and look for images of the Pituitary Gland. There is usually a small comment with the images. Fell free to contact me again if there are things on the web you don't fully understand. You can of course also discuss these items with your doctor. ...Read more