Devices and systems for forming chronic stable atrial shunt

A method of forming a shunt between a right atrium and a left atrium of a mammalian heart includes puncturing an atrial septum between the right atrium and the left atrium to form a shunt. An ablation device having a balloon is at least partially advanced through the diverter. The balloon expands and is configured to thermally isolate the atrial septum from blood within the left atrium and the right atrium. Ablation energy is delivered to ablate the atrial septum. 一种在哺乳动物心脏的右心房和左心房之间形成分流器的方法，该方法包括穿刺该右心房和该左心房之间的心房隔膜以形成分流器。将具有球囊的消融装置至少部分地推进穿过该分流器。该球囊膨胀并被构造成将该心房隔膜与该左心房和该右心房内的血液热隔离。递送消融能量以消融该心房隔膜。