Written by Padma Sundareson | 
Medically Reviewed by Dr. Sunil Shroff, MBBS, MS, FRCS (UK), D. Urol (Lond) on Jul 22, 2016

Heart Septum

The heart is divided into two sides by a wall called septum.

The heart is a muscle that beats about hundred thousand times a day. Its main function is to pump blood to the whole body to supply oxygen and nutrients to all the cells. The heart is divided into two sides by a wall called septum. The left side of the heart receives oxygen rich blood from the lungs and pumps it to the body. The right side of the heart receives oxygen-depleted blood from the body and pumps it to the lungs to get it oxygenated. The septum prevents blood mixing from the left side and the right side. The septum can be a thin membranous structure or a thick muscular structure.

The structure separating the upper chambers of the heart is called the “Interatrial septum”. The Interatrial septum develops in several stages during the first and second months after conception. In the fetus, there is communication between the two atria and a large amount of blood passes from the right atrium to the left atrium. This is to prevent stress on the lung muscles which are non functional at that time. Septum primum is the first tissue to act as an Interatrial septum. It does not completely cover the atria. Septum secundum forms to the right and anterior of the septum primum. This is a muscular structure that has a hole in it called the “foramen ovale” to allow continued shunting of blood in the fetus. As the development progresses, the septum primum diminishes and forms a flap over the foramen ovale. At birth, a reversal in the pressure gradient occurs between the atria and the septum primum covers the foramen ovale.

The “Interventricular septum” divides the bottom chambers of the heart. Majority of the septum is a muscular structure. The upper portion of the septum is thin and fibrous and is called the membranous septum.

Cross Sectional View Of the Normal Heart

Atrial Septal Defect (ASD)

References:

  1. http://medind.nic.in/icb/t05/i7/icbt05i7p595.pdf - (http://medind.nic.in/icb/t05/i7/icbt05i7p595.pdf)
  2. CIRCULATORY CHANGES AT BIRTH - (http://mcb.berkeley.edu/courses/mcb135e/fetal.html)
  3. KidsHealth - (http://www.kidshealth.org/)

Comments

Angel_C Tuesday, September 25, 2012

I have VSD since birth [Tetralogy of Fallot] and I'm now 29 years old, I'm aware that I'm not allowed to do any strenuous activities but is yoga allowable for me? I can't afford to go to a doctor. I'm from a 3rd world country in Asia.

motisagar Tuesday, August 30, 2011

HOLE IN HEART IN MY COSION HEART ,I HAVE NO MORE MONEY FOR SURGERY.MY BABY LIE ON BED AND WAITING FOR DEATH.PLEASE SUGGEST ME FOR SOME WELFARE SOSITY ,WHO HEALP MY CHILD.

Man56 Thursday, September 8, 2011

dear friend, why don't u try get BPL [below poverty line]card, once this card made i belive free medicins and treatment avilable at all govt hospitals.

RameshRaju Tuesday, January 8, 2013

get it done in Sathyasai Institute of Medical sciences in Bangalore.. They will do for free..

Kuotkuany Saturday, July 23, 2011

Well and briefly explained; VSD account for upto 25% of all Cardiac Heart Failure, which simply means that 2 out of 1000 lives birth are affected. Isolated complex malformations do happened and lower left sternal edge with/or without parasternal thrill is encountered mostly during examination. Yeah/and ballabalala....

manuheart123 Saturday, December 18, 2010

Ventricular Septal Defect Ventricular Septal Defect is usually symptomless at birth. It usually manifests a few weeks after birth. Small VSD can be asymptomatic, but larger ones can result in heart failure, pulmonary hypertension or growth restriction with recurrent respiratory infections like pneumonia. Other features may be poor weight gain, breathlessness on breast feeding and increased heart rate. If not intervened, it can develop into Eisenmenger Syndrome, which has a very bad outcome. http://heart-consult.com

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