Describe pathophysiology of tetralogy of fallots, Biology

Describe Pathophysiology of tetralogy of fallots ?

The PS causes concentric hypertrophy of right ventricle without enlargement. The right ventricular pressure are equal to or higher than left ventricular / aortic systolic pressure to maintain forward blood flow to lungs. Hence an increase in PS results in right to left shunt across large unrestrictive VSD, which is non - turbulent and silent on auscultation. The pulmonary stenosis results in an ejection systolic murmur (ESM), the intensity of which is directly proportional to pulmonary blood flow across the valve. Cyanosis is thus directly proportional and ESM is inversely proportional to the severity of PS. The PS causes a delayed and soft pulmonary component of second sound, which is inaudible in most patients. Hence on bedside examination second sound is single since only aortic component is audible. The VSD, by decompressing the right ventricle, limits the severity of right ventricular hypertrophy unlike in pure PS, The left parasternal impulse is, therefore, mild and generally without thrill. The hypercyanotic spells (also known as 'Cyanotic spells' or 'tet' spells)

Posted Date: 5/6/2013 3:08:52 AM | Location : United States







Related Discussions:- Describe pathophysiology of tetralogy of fallots, Assignment Help, Ask Question on Describe pathophysiology of tetralogy of fallots, Get Answer, Expert's Help, Describe pathophysiology of tetralogy of fallots Discussions

Write discussion on Describe pathophysiology of tetralogy of fallots
Your posts are moderated
Related Questions
Q. What is phosphorylation? What are various biological processes in which phosphorylation plays a critical role? Phosphorylation is the name given to procedure of the addition

Q. Is a viral infection treated with the same kind of drug that treats bacterial infections? The Antibacterial drugs, potent against a great variety of bacteria, are not effect

Explain Composition of Malt Yeast Peptone Glucose Medium? Malt Extract - 3.0 gm Yeast Extract - 3.0 gm Peptone - 5.0 gm Glucose - 10.0 gm Agar - 15.0 gm Distille

Determine the solubility of micronutrient cations The solubility of micronutrient cations is at a maximum at low pH values. As the pH increases the ions of these elements first

Q. What is the basic importance of water for enzymatic activity? Ans. Biological catalysts, Enzymes, relay on water to reach their substrates and attach to them. There is


Define Recommended Dietary Allowances for Vitamin D? The recommendations of vitamin D are expressed as IU. 1 IU is defined as the activity contained in 0.025 mcg of cholecalci

State the term - Symbolic representation Symbolic representation is the representation of both the external and internal world through symbols and has been discussed in relatio

Q. What is the commercial importance of algae? Numerous algae have high nutritional value and are commercialized and consumed as human food they are very popular food in the or

Define Basic Calculations during the practical work in Laboratory? Some basic mathematical formulas and conversion factors are given herewith to help you in your calculations d