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Atrial Fibrillation–What It Is And How To Deal With It

Friday, October 16th, 2009

To understand what atrial fibrillation is we first have to understand what is happening with a healthy heart. Though the heart is a complicated organ with a very serious job to do, we can picture the heart quite simply picture two sets of paired chambers, one larger pair sits on top of the lower, smaller pair. The larger chambers are known as atria (or atrium if singular) and the lower chambers are known as ventricles.

The atrium’s job is to collect the blood as it enters the heart and then to push this blood into the ventricle sitting below it which will in turn, expel the blood from the heart under pressure as it starts its journey around the body again. This results in the double-beat of the normal, healthy heart as first the atrium contracts and then the ventricle this is known as the Sinus Rhythm by doctors. How this is all coordinated is the responsibility of a part of the heart located at the top of the right atrium this is known as the Sinus Node or he Sinoatrial Node (the SA Node) this is the heart’s natural pacemaker.The electrical signal travels across the right to the left atrium and ends at the Atrioventricular Node (the AV Node), then the atrium contracts just before the beat of the ventricles.

 

Now atrial fibrillation occurs where the electrical signal bypasses the atrium (hence the atrial term) the atrium doesn t contract properly and instead, it fibrillates and to imagine this, think of a jelly on a plate when it is shook. What causes the electrical signal to bypass the atrium or to deteriorate which also can cause the condition may be damage to the SA Node or some other condition.Regardless of the cause, symptoms can go unnoticed until something serious like a heart attack or stroke occurs. This is why it is important to have regular cardiac screenings which can identify the condition early.

Those with a history of heart problems, rheumatic fever, diabetes or strokes are all in a higher risk category for contracting atrial fibrillation. Symptoms that present themselves may include shortness of breath, intolerance to exercise, palpitations and sometimes even angina. The condition lends itself to treatment with mild instances not requiring any treatment where the patient is not in a high risk group or the symptoms are not creating issues for the patient. First stage treatment includes medication to control the heart rhythm and the use of catheters though open-heart surgery may be required using an operation known as the Maze Procedure.

The Maze procedure consists of making incisions in the atrium and sewing them up again; this allows the atrium to hold blood and contract normally but the electrical signal cannot traverse the incisions that have been made the signal must follow the route which is delineated by the incisions and cannot, therefore, bypass the atrium.Sometimes an artificial pacemaker will need to take the place of the SA Node that is damaged by the disease. The success rate is high with 80% to 100% success rate being reported.

Other Relevant Posts:

 Penn Researchers Describe Cellular Source of …

While studying how the heart is formed, scientists at the University of Pennsylvania School of Medicine serendipitously found a novel cellular source of atrial fibrillation (AF), the most common type of abnormal heart beat. … Professor of Medicine, have identified a population of cells in the atria of the heart and pulmonary veins of humans and mice that appear to be the seat of AF. The finding may lead to a more precise way to treat AF, with reduced side effects.   

Medical Devices Today

More evidence is needed to determine the benefits of using catheter ablation for treating atrial fibrillation, especially in the frail elderly population, according to the Medicare Evidence Development and Coverage Advisory Committee.   

Texas Cardiac Arrhythmia Institute at St. David’s Medical Center 

Texas Cardiac Arrhythmia Institute at St. Davids Medical Center Selected to Conduct Clinical Trial for Device to Treat Atrial Fibrillation 5. Texas Back Institute Leads Way in New Facet Joint Clinical Trial … 

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Atrial fibrillation results in a faster and irregular heart rate. It may also result in palpitations, fatigue and shortness of breath… there may be a rapid and irregular pulse and irregular blood pressure…. 

System helps doctors treat atrial fibrillation

Doctors develop a trained eye to interpret two-dimensional X-rays or ultrasound images. But when cardiologists need to scar the inside of the heart to treat atrial fibrillation, a flat picture may…   

 New Catheter Ablation

Until recently, this technique was not suitable for treating atrial fibrillation, as there are multiple sources of electrical signal disruption associated with this condition, whereas with Tachycardia there is usually only a single …   

Atrial fibrillation: Treat it or pay the price

The most common abnormal heart rhythm is atrial fibrillation and involves the atria, or the heart’s two upper chambers.  


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Causes,Symptoms,Treatment of Atherosclerosis

Saturday, March 28th, 2009

 
Causes of Athersoclerosis

The inner walls of the arteries consist of an innermost layer of surface cells and under these a layer of smooth muscle cells. The changes by atherosclerosis take place under the surface cells and in this muscle layer. The changes consist of: A certain degree of cell growth or tumor where cholesterol and fat develop.

These deposits are called atherosclerotic plaque or atheroma. Atherosclerosis is one of several types of artery thickening and hardening. Another name for this thickening and hardening of arteries is "arteriosclerosis". Often atherosclerosis is also just called arteriosclerosis.

hardening of arteries

The development of hardening of the arteries probably begins by a damage in the inner laers of the surface cells. This damage causes cholesterol and fat to penetrate into the vessel walls and deposit there. This also induces cells to multiply. Later also calcium salts are deposited.

Factors that cause arterial damage and thus atherosclerosis are:

  • High content of cholesterol in the blood.
  • High content of blood fat and especially saturated fat.
  • Inflammation in the blood vessels. A sign of such inflammation is the presence of a substance called c-reactive protein.
  • High amount of oxidation agents in the blood.
  • High blood pressure.
  • High content of low density lipoprotein (LDL) in the blood serum, and low content of high density lipoprotein (HDL) in the blood. Lipoprotein is a combination of a protein molecule and fat or cholesterol. Lipoproteins carry cholesterol or fat from place to place.
  • Diabetes.
  • Age.
  • Smoking.
  • Men have a somewhat higher chance of getting this condition than women.
  • High content of the amino acid homocystein in the blood serum.

Many of these factors are ultimately caused by a bad diet and lack of daily exercise.

 
Symptoms

Since atherosclerosis can affect all body parts, the symptoms will vary. However, general symptoms from the affected body parts are:

  • Decreased performance, easy to tire out.
  • Pain by physical activity, so called anoxic pain.
  • By severe impairment of blood flow, tissue damage or sores can occur.

When the heart is affected, the symptoms will be:

  • General bad condition.
  • Anoxic pain from the heart and surroundings by physical activity, called angina pectoris.
  • Feeling of not getting enough air, or breathing problems.

Atherosclerosis can cause blood clots that close the blood flow. There are several ways this can occur:

  • The atherosclerotic plaque can rupture, making a sore in the inner wall of the vessel. At such a sore blood can coagulate, making a blood clot.
  • The atherosclerotic plaque itself can grow to close a blood vessel.
  • Blood coagulated at an affected area can tear loose, float with the blood stream to another place and prop a blood vessel at the new place.
  • A portion of the plaque itself can tear itself loose and clog another blood vessel.

When the heart is stricken by a blood clot, heart tissue is suddenly destroyed, a condition called heart infarction, causing sudden heart failure or death.

When a blood clot strikes the brain, brain tissue is destroyed or impaired, resulting in a stroke,causing paralysis, decreased consciousness, coma or even death..

Treatment and Prevention

Atherosclerosis can be prevented and to some extend be cured by these measures, of which most are lifestyle adjustments:

  • Eating just a little or moderate amount of fat.
  • Eating just a moderate amount of sugar.
  • The fat eaten should be a blending of different types of unsaturated fat from sources like: Olive oil, rape oil, sunflower oil, soy oil, walnut oil and fish. Then you will get enough of mono-unsaturated fat, omega-3-unsaturated fat, and omega-6-poly-unsaturated fat, but not too much of any of them.
  • Eating much fish and just a little red meat.
  • Eating a good amount of fruit and vegetables each day.
  • Supply of enough vitamins, minerals and anti-oxidants.
  • Only consuming moderate amount of salt.
  • Stop smoking.
  • Getting high blood pressure treated if lifestyle measures do not bring blood pressure down.
  • Daily exercise fitted for one’s own condition.
  • Eliminate stress in the daily life and at the job.
  • Stressing down and getting enough rest.

If  high cholesterol levels  do not respond properly to lifestyle measures, cholesterol lowering medication can be used, such as HMG-CoA reductase inhibitors.

By serious local narrowing of an artery, surgery to clean out or widen the artery is sometimes performed. Sometimes the artery is replaced by a graft taken from another body part or by an artificial vessel. When this is done in the heart, it is called heart bypass surgery.

Alternative treatment to clean out the arteries is an option. There is for example a treatment consisting of using the substance EDTA to carry constituents of plaque away from the arteries. The molecules of this substance have the ability to grip around other molecules, for example cholesterol molecules, and carry them away. There is however a controversy about the effectiveness of this treatment, called chelating therapy.

Published by Heart Wellness Store

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B Vitamins Slow Hardening of Arteries

High-dose B vitamins lower levels of homocysteine and reduce heart disease risk. [[ This is a content summary only. Visit my website for full links, other content, and more!.


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