Figure 7
From: Percutaneous treatment of patients with heart diseases: selection, guidance and follow-up. A review
Panel A: interatrial septum bowing towards the right atrium during normal breathing; Panel B: bowing of the atrial septum towards the left atrium demonstrating that an adequate Valsalva manoeuvre has been performed; Panel C: microbubbles in the left cavities after Valsalva manoeuvre within three cardiac cycles after the contrast material fills the right atrium, positive for PFO.