from Section 1 - The Basics: for the Obstetrician
Published online by Cambridge University Press: 14 April 2020
A large range of pulmonary and cardiac diseases may affect pregnant patients. The most common causes include acute viral respiratory infections, chronic pulmonary or cardiac conditions and bacterial pneumonia. Asthma is the most common pulmonary disease to complicate pregnancy, and a third of patients experience worsening of asthma control during pregnancy. In patients with chronic obstructive pulmonary disease, cystic fibrosis (CF), non-CF bronchiectasis or interstitial lung disease, and rarely in patients who have a history of lung transplantation, the physiological and biological conditions of pregnancy will not exacerbate the underlying pulmonary disease as much as reduce pulmonary reserve and disease tolerance. Pregnancy is associated with an increased risk of aspiration pneumonitis, pulmonary embolism, cardiomyopathy, acute myocardial infarction and aortic dissection. Often these occur in patients without other known risk factors.
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