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Ventilation-perfusion mismatch resulting from iatrogenic pulmonary vein stenosis after radiofrequency ablation: a

Ka Kit Wong1, Simon M Gruenewald, George Larcos

  • 1Centre for Biomedical Imaging and Research, Department of Nuclear Medicine and Ultrasound, University of Sydney, Westmead Hospital, Sydney 2145, New South Wales, Australia. kakit41@gmail.com

Clinical Cardiology
|October 10, 2009
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Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...