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Pulmonary Blood Pressure: A Case Study

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Radiographic features with heart failure will demonstrate changes in cardiac output and pulmonary venous pressure, evident in dilated pulmonary vessels, interstitial, pleural and alveolar fluid leakage, and increased systemic venous pressure with chronic disease (Cremers, Bradshaw & Herfkens, 2010). Based on the pathophysiological process present with Mrs. Smith, some of the following features might be noticeable: Redistributed pulmonary blood flow will be appreciated through an increased (normal 1-2 mm) artery-to-bronchus ratio at the hilar level in the upper and middle lobes; since gravity and positioning (supine versus erect and decubitus) will have an impact, comparison with serial or old films if existing will be helpful (Cremers et al., …show more content…

A large cardiac silhouette and an increased cardiothoracic diameter > 50 % can be indicative of cardiomegaly, though an increase in left ventricular volume beyond 66 % is required to be visible (Chandrasekhar, n.d.; Cremers et al., 2010). In heart failure, unilateral or bilateral (in 70 % of cases) effusion of pleural fluid can be noticed near the costophrenic angle or from the distance to the stomach bubble, based on patient position (Chandrasekhar, n.d.; Cremers et al., 2010). Another radiographic feature which can help assess for presence and evolvement of heart disease, especially with serial x-rays, is the vascular pedicle width, normally < 60 mm, but indicating pathology when at least 85 mm in 80 % of cases: Representing a measure of intravascular volume, 5 mm increase in diameter correspond to one liter increase in circulating blood volume; an increased diameter of the azygos vein also is a sign of fluid overload (Chandrasekhar, n.d.; Cremers et al.,

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