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Apparatus and methods to create and maintain an intra-atrial pressure relief opening

  • US 8,882,697 B2
  • Filed: 02/10/2012
  • Issued: 11/11/2014
  • Est. Priority Date: 11/07/2006
  • Status: Active Grant
First Claim
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1. A method for normalizing elevated blood pressure in a heart chamber, the method comprising:

  • penetrating an atrial septum between a right atrium and a left atrium of a heart to create an opening in the atrial septum;

    increasing the opening to a larger size to create an intra-atrial pressure relief opening;

    after the increasing step, treating tissue near the intra-atrial pressure relief opening to slow a natural healing process of the tissue to maintain patency of the intra-atrial pressure relief opening without implanting a stent or valve in the intra-atrial pressure relief opening; and

    permitting blood to flow from the left atrium to the right atrium through the intra-atrial pressure relief opening to reduce left atrial pressure.

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