Explain fossn ovalis defect ostium secundum defect, Biology

Assignment Help:

Explain Fossn Ovalis Defect (Ostium Secundum Defect) ?

This is the most common type of atrial septal defect.
The usual approach is through a midline incision and median sternotomy. In young girls, for cosmetic reason, approach through a submammary light thoracotorny or low and minimally invasive midline incision is used. Piece or pericardium is harvested for patch closure of the defect. Ascending aortic and bicaval cannulations are done for cardio pulmonary bypass. The operation is done at 32 to 34°C after aorta is clamped aortic root cardioplegia given.

After snaring SVC and IVC tapes, right atrium is opened parallel to atrioventricular groove. Anatomy of the defect is studied and mitral valve is inspected and tested for incompetence. When the defect is fenestrated, these strands are excised to form a single large defect. Small defects can be directly closed but a patch closure is generally preferred. The pericardial patch is first sutured to the inferior aspect of the defect between inferior vcna cava and left atrium. Great care is taken not to confuse the Eustachian valvc of' IVC with remnant qf the floor of fossa ovalis. Such an error can lead to diversion of IVC to left atrium when the operation is done under circulatory arrest without an IVC cannula. Once the lower part of the patch is anchored, the rest of the patch is sutured to the margins of the defect. Care is taken to avoid injury to the atrio ventricular node situated at the apex of the Koch's triangle.


Related Discussions:- Explain fossn ovalis defect ostium secundum defect

X linked in the calico cat, A calico female has a litter of kitten which in...

A calico female has a litter of kitten which includes several calico females a yellow male a couple of yellow females and two black males what is the likely color of the father and

Is cancer a disease transmitted to the individual offspring, How are mutage...

How are mutagenic agents related to cancer incidence in a population? Is cancer a disease transmitted to the individual offspring? The exposition of a population to mutagenic a

Invertebrates, 1) What are some characteristics that define the lifestyle o...

1) What are some characteristics that define the lifestyle of a parasitic nematode? 2) What are beneficial nematodes? Discuss their significance

Indications for surgery, Indications 1) Symptomatic patient with normal...

Indications 1) Symptomatic patient with normal LV function (ejection fraction 2 0.5 at rest). If they are in class In or IV NYHA, surgery is recommended. In this group of pat

What is the name of the sea anemones and larva of corals, Q. What is the na...

Q. What is the name of the sea anemones and larva of corals? What is the biological importance of that larval stage? Sexual reproduction in sea anemones and corals have a larva

Explain the observation or inference for seliwanoff test, Explain the Obser...

Explain the Observation or Inference for seliwanoff's test? 1. Wine or cherry red colour seen. Wine red colour confirms the presence of a ketose sugar. Note: On overheating

Describe prematurity in coronaw artery disease, Describe Prematurity in cor...

Describe Prematurity in coronaw artery disease ? CAD in Indians tends to be more aggressive and manifests at a younger age. Generally CAD occurring before the age of 55 years i

Objection of cell theory, OBJECTION OF CELL THEORY (REASONS OF DISCARTION) ...

OBJECTION OF CELL THEORY (REASONS OF DISCARTION) (i)       Living organism are composed of various types of cells and their product but members of monera & protista don't have

Explain use of food additives - method of food preservation, Explain Use of...

Explain Use of food Additives - method of food preservation? Food additives may be defined as substances added intentionally to food, generally, in small quantities to improve

Elephentiasis, Elephentiasis It is a disease seen all over the world...

Elephentiasis It is a disease seen all over the world. The adult worm lives in the lymph glands and the lymph vessels of man. As the number of worms increases, they bl

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd