Number of procedures with regard to the performed TAVI volume of a distinct centre in a given year
| TAVI volume in centre | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 |
| <50 procedures, n | 613 (40) | 1234 (61) | 1155 (51) | 1107 (43) | 960 (36) | 765 (31) | 617 (30) |
| 50–99 procedures, n | 236 (3) | 658 (10) | 1875 (26) | 1957 (27) | 1569 (20) | 1930 (25) | 1135 (16) |
| ≥100 procedures, n | 273 (NA*) | 707 (NA) | 1776 (3) | 3459 (7) | 5711 (16) | 6452 (9) | 9807 (20) |
| Total number, n | 1122 (≥44) | 2599 (≥72) | 4806 (80) | 6523 (77) | 8240 (72) | 9147 (65) | 11 559 (66) |
Please note that the numbers of procedures performed per year at a given centre were not constant over the observation period, so that it is possible for a centre to fall into a different volume group in a different year. Number of centres in parentheses.
*NA, not available, exact number censored by the Research Data Center of the Federal Bureau of Statistics (DESTATIS) due to data protection concerns.
TAVI, transcatheter aortic valve implantations.