@asolidrock Basically they slit my pericardium using a new type of catheter that they are trying to gain FDA approval for. I was the fourth person to have this done. Tremendous difference for me.
https://www.tctmd.com/slide/perctuaneous-pericardiotomy-preliminary-findings-pericut-catheter-system-early-feasibility
The link will take you to a PowerPoint Dr Killu did on the surgery results as of March. The registration to see the slides is easy and worthwhile.