Pathophysiology and assessment of patent ductus arteriosus, Biology

Pathophysiology 

If  the ductus arteriosus does not close after birth, the higher pressure in the aorta than in the pulmonary artery causes the blood to flow from the aorta, through the patent ductus into the pulmonary artery thus resulting in left to right shunt. This results in increased work load on the left side of  the heart, increased vascular pressure  in the pulmonary tree and increased blood flow in the ascending aorta. 

Assessment 

The clinical features depend upon the size of  the ductus and the amount of  shunting. The defect is discovered only on routine examination of  a classic "machinery murmur" which occurs during systole as well as diastole. 

The mild symptoms may include growth retardation, dyspnoea on exertion, palpitation, easy fatigability and recurrent  respiratory infection. Other clinical symptoms may include heart rate over 150/minute, gallop rhythm due to rapid filling of the ventricle, bounding pulses due to increased systolic pressure and wide pulse pressure. In severely affected cases congestive heart failure may  be present. 

Radiologic examination and electrocardiogram shows enlargement of  left ventricle and left atrium. The ascending aorta is dilated and there is increased pulmonary vascularity. Echocardiogram  is normal and the cardiac catheterization  if  necessary shows increased pressure in right ventricle and pulmonary artery and oxygenated blood in pulmonary artery.  

Posted Date: 10/26/2012 8:42:18 AM | Location : United States







Related Discussions:- Pathophysiology and assessment of patent ductus arteriosus, Assignment Help, Ask Question on Pathophysiology and assessment of patent ductus arteriosus, Get Answer, Expert's Help, Pathophysiology and assessment of patent ductus arteriosus Discussions

Write discussion on Pathophysiology and assessment of patent ductus arteriosus
Your posts are moderated
Related Questions
Q. Relevance of food packaging? To understand the relevance of food packaging, it is necessary for us to understand how spoilage reduces the availability of food. In the deve

Q. Why is the sun the "motor" of the water cycle? The sun can be considered the motor of the water cycle for the reason that upon its energy the transformation of liquid water


Change of Health Status Over Time Health of a nation can be gauged from the available information on death.Disaggregated data by causes of death is more reflective of the status

Describe Class Echinoidea in animal kingdom? Sand dollars and sea urchins either have flattened disc-like bodies, or are somewhat spherical. While they lack the typical five-ar

Define Components of Total parenteral nutrition? Glucose: Initiated at the rate of 6 mg/kg/min and increased upto 12-1.4 mg/kg/min, but care to be taken to prevent hyperglyce

Type of bacterial food poisoning Infection type: The infection type results from the release of toxin in the bowel by microorganisms taken in foods, e.g., Salmonella or Vibr

Forms of Soil Water Gravitational Water or Ground Water: After a heavy rain or irrigation, much of the water drains or sinks downwards. This is called gravitational water.

Pathogenesis of Viruses Viral diseases An indicated before, viruses cause a number of infectious human diseases from minor ailments like common cold, to fatal disease, lik

What is Atrial Switch operation and Rastelli in Heart dieases? Atrial Switch Operation: (Senning or Mustard procedures) By means of a baffle the systemic venous blood could b