Acute and long-term (2-years) clinical outcomes of the CoreValve 31mm in large aortic annuli: A multicenter study

Guilherme F Attizzani, Yohei Ohno, Azeem Latib, Anna Sonia Petronio, Cristina Giannini, Federica Ettori, Salvatore Curello, Francesco Bedogni, Denise Todaro, Nedy Brambilla, Giuseppe Bruschi, Paola Colombo, Patrizia Presbitero, Rosario Fiorilli, Arnaldo Poli, Paola Martina, Antonio Colombo, Marco Barbanti, Corrado Tamburino

Research output: Contribution to journalArticlepeer-review


INTRODUCTION: Little is known about the early and late performance of the 31mm CoreValve Revalving System (CRS, Medtronic Inc., Galway, Ireland). Our aim was to compare acute and long-term results of the 31mm CRS with other valve sizes.

METHODS: Consecutive patients undergoing transcatheter aortic valve implantation (TAVI) with CRS in nine Italian centers were prospectively included and dichotomized according to prosthesis size in two different groups, as follows: 31mm and other valve sizes (i.e., 23, 26, and 29mm combined). End points were defined according to Valve Academic Research Consortium definitions. Propensity score matching was performed.

RESULTS: In total, 2069 patients (n=169 [8%] in the 31mm group and n=1900 [92%] in the other valve sizes group) were included. After propensity matching, the implantation of the 31mm valve was associated with lower rates of procedural- (91.3% vs. 98.1%, p=0.030) and device-success (88.5% vs. 97.1%, p=0.016), longer procedural time (120 [80-180] min. vs. 90 [60-120] min., p<0.001), and higher rates of implantation of a second valve (10.6% vs. 2.9%, respectively, p=0.027). The rates of permanent pacemaker implantation in the 31mm group were higher but not statistically different from other valve sizes (41.7% vs. 30.9%, respectively, p=0.149). Significant improvement, without between-group differences, was observed in NYHA functional class. Cardiovascular death was lower in the 31mm valve group through 2-years (3.8% vs. 13.5%, respectively, p=0.014).

CONCLUSIONS: The acute performance of the 31mm CRS was worse than other valve sizes but no negative impact was observed in long-term outcomes.

Original languageEnglish
Pages (from-to)543-549
Number of pages7
JournalInternational Journal of Cardiology
Publication statusPublished - Jan 15 2017


  • Aged
  • Aged, 80 and over
  • Analysis of Variance
  • Aortic Valve/physiopathology
  • Aortic Valve Stenosis/diagnostic imaging
  • Bioprosthesis
  • Cohort Studies
  • Female
  • Follow-Up Studies
  • Heart Valve Prosthesis
  • Humans
  • Italy
  • Kaplan-Meier Estimate
  • Male
  • Propensity Score
  • Prospective Studies
  • Prosthesis Design
  • Prosthesis Failure
  • Risk Assessment
  • Severity of Illness Index
  • Statistics, Nonparametric
  • Survival Analysis
  • Time Factors
  • Transcatheter Aortic Valve Replacement/methods
  • Treatment Outcome


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