Welcome to the forum.
Have you asked your doctor these questions? He/she would be the best person to comment about
such. I've never heard of this device, but took some time to look online. Interesting technique. The literature I read seems to indicate that over time that the tissue of the heart grows over the device. There is another device, also installed by catheter, that also, over time, has tissue grow over it.
If this is the case, it would seem unlikely that the device would shift if modestly subject to the cases you describe. Nevertheless, your doctor should be asked these questions and adjustments to your lifestyle, if applicable, should be made on the doctors recommendations.
While researching, I found a link to a site discussing injuries and illnesses to sports players. One, quite far down on the page, concerned a Hockey Player that had a stroke due to an uncorrected hole in the heart. It was suggested in the article that a device similar to what you describe will be used to repair the hole. It was also suggested that he will likely be returning to the sport. If that was the case, there are few sports that inflict as much physical abuse on its participants as Hockey. undisclosedinjury.blogspot.com/2014_02_01_archive.html