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What is Atrial Fibrillation The Different Types of Atrial Septal Defect
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It seldom occurs in those under 40 years old, but occurs in up to 5% per cent of those over 80 years of age. It’s favorite age to strike is “my age” late forties to early fifties. I am 52; mine started when I was 51 but could have been happening for months or even years unnoticed.   Atrial Fibrillation (AF) or Afib as I like to call it, is the most common heart rhythm disorder and effects around 1per cent of the population. Its becomes even more common with increasing age.

It seldom occurs in those under 40 years old, but occurs in up to 5% per cent of those over 80 years of age. It’s favorite age to strike is “my age” late forties to early fifties. I am 52; mine started when I was 51 but could have been happening for months or even years unnoticed. It should be said Atrial Fibrillation is an electrical problem in the heart and not a plumbing problem like a normal heart attack or blockage.

Normal Heart Electrical Activity and What Goes Wrong in Atrial Fibrillation.

The heart is basically a large muscular pump that drives blood around the body. To do this correctly, the heart’s chambers, there are four of them, must be precisely controlled electrically so they work together as one pumping unit. The normal heartbeat begins with the sinoatrial or Sinus Node a natural pacemaker located in the top right heart chamber (the right atrium).

This electrical pulse spreads across both top chambers, the atria, causing them to contract. The contraction of the atria moves blood into the two ventricles, which are the main pumping chambers. The electrical signal is delayed by about one tenth of a second by a special structure called the atrioventricular (AV) node, and then spreads quickly across the ventricles to cause them to contract. This extra filling of the ventricles by the atria is not vital, but does serve to “prime the ventricular pump” and improve overall heart function.

These atria, which contain the heart’s natural pacemaker, the SA node, are, the part of the heart involved in Atrial Fibrillation. The ventricles, the muscular part of the heart that actually pumps the blood are electrically isolated from the atria, and the only way the electrical signal can reach them is through the AV node.

Normal heart rhythm is termed sinus rhythm (no, nothing to do with your nose)

Most people have a resting heart rate of between 60 and 80 beats per minute. In Atrial Fibrillation, the atria contract rapidly and irregularly at rates of 400 to 600 beats per minute. As luck (see GOD) would have it, the AV node will not allow that many signals through to the ventricles; only about 1 or 2 out of every 3 Atrial beats passes to the ventricles. Even so the ventricles beat too fast, at rates of 110 to 180 beats per minute. (Mine was over 170!)

The Most Common Symptoms:

Feeling out of breath, reasonable since your heart is beating faster than if you were running a marathon.

Heart palpitations (a sudden pounding, fluttering, or racing feeling in the chest).

Lack of energy; feeling over-tired.

Dizziness (feeling faint or light-headed).

Chest discomfort (pain, pressure, or discomfort in the chest area)

In my case — inability to sleep lying down

The Different Types of Atrial Septal Defect

Artial septal defect is one of the most known congenital heart diseases. This defect occurs in the wall of the septum between the top areas of the hearts chamber that have holes. ASD is present from birth; children who have this disease will not have symptoms and complications until they enter adolescence period.

Artial septal defect may be discovered during check up and physical examination. The main method to detect and confirm ASD is Echocardiography or chest X-ray. This could be treated by an open heart surgery or non-surgical patch which uses a catheter.

The most common type of ASD is the Ostium Secundum Artial Septal Defect. This occurs between the right and left atrium in the center of the septum also called a patent foramen ovale and is extremely small. This comprises 6 to 10 percent of all congenital heart diseases. This defect usually arises from enlarged foramen ovale and excessive absorption of septum primum.

Most people with secundum ASD don’t have significant symptoms in early adulthood. The usual symptoms of this defect are palpitations, syncope and easiness to get tired. A Secundum ASD complication includes artial fibrillation, stroke, flutter, Eisenmenger’s syndrome and hypertension that is unusual before the age of 20s.

The Patent foramen ovale has a little hemodynamic result; it is a trace of the fetal foramen ovale. It is connected to paradoxical embolism, migraine and decompression sickness. There may not be any shunting of blood noted on echocardiography unless the patient coughs.

Ostium Primum Artial Septal Defect is also known as one of the most common types of ASD but is usually called as atrioventricular septal defect that can be found at the lower portion of artial septum. This often has a mitral valve defect which means stretched out hole at the leaflets that forms the mitral valve.

Sinus Venosus Artial Septal Defect is also type of ASD that is located in upper portion of the artial septum. This often has a pulmonary abnormality vein. It is connected to four pulmonary veins, two from the left lung and two from the right lung. With a sinus verosus, ASD might have an abnormality of the right lung pulmonary vein which is also called an anomalous pulmonary vein.

By Aatif Riaz
All rights reserved. Any reproducing of this article must have the author name and all the links intact.


Biography: Aatif Riaz is a professional article writer. He loves to write articles about health

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