Prosthesis–Patient Mismatch in Small Aortic Annuli: Self-Expandable vs. Balloon-Expandable Transcatheter Aortic Valve Replacement
by
, ,
Jerome Ferrara
1,*,†,‡, 
Alexis Theron
2,‡,
Alizee Porto
2,
Pierre Morera
2,
Paul Luporsi
3,
Nicolas Jaussaud
2,
Vlad Gariboldi
2,4,5,
Frederic Collart
2,4,5,
Thomas Cuisset
1,4,5,§ and
Pierre Deharo
1,4,5,§ 1
Département de Cardiologie, CHU Timone, 13005 Marseille, France
2
Département de Chirurgie Cardiaque, CHU Timone, 13005 Marseille, France
3
Département de Cardiologie, Centre Hospitalier Bastia, 20600 Bastia, France
4
Inserm, Inra, C2VN, Aix-Marseille Université, 13005 Marseille, France
5
Faculté de Médecine, Aix-Marseille Université, 13005 Marseille, France
*
Author to whom correspondence should be addressed.
†
Current address: Service de Cardiologie, CHU Timone, 13005 Marseille, France.
‡
These authors contributed equally to this work.
§
These authors contributed equally to this work.
J. Clin. Med. 2022, 11(7), 1959; https://doi.org/10.3390/jcm11071959
Submission received: 8 February 2022
/
Revised: 15 March 2022
/
Accepted: 29 March 2022
/
Published: 1 April 2022
(This article belongs to the Section Cardiology)
Abstract
:Prosthesis–patient mismatch (PPM) is associated with worse outcomes following surgical aortic valve replacement (SAVR). PPM has been identified in a significant proportion of TAVR, particularly in patients with small aortic annuli. Our objective was to evaluate the hemodynamic performances of balloon-expandable (BE) (Sapiens 3TM) versus two different self-expandable (SE) (Evolut ProTM, Accurate NeoTM) TAVR devices in patients with small aortic annulus defined by a computed tomography aortic annulus area (AAA) between 330 and 440 mm2. We enrolled 131 consecutive patients corresponding to 76 Sapiens 3 23 mm (58.0%), 26 Evolut Pro (19.9%) and 29 Accurate Neo (22.1%). Mean age was 82.5 ± 7.06 years, 22.9% of patients were male and mean Euroscore was 4.0%. Mean AAA was 374 ± 27 mm2 for Sapiens 3, 383 ± 29 mm2 for Corevalve Evolut Pro and 389 ± 25 mm2 for Accurate Neo. BE devices were associated with significantly higher rates of PPM (39.5%) as compared to SE devices (15.4% for Corevalve Evolut Pro and 6.9% for Accurate Neo) (p < 0.0001). Paravalvular leaks ≥ 2/4 were more often observed in SE devices (15.4% for Corevalve Evolut Pro and 17.2% for Accurate Neo) than in BE devices (2.6%) (p = 0.007). In conclusion, SE TAVR devices did achieve better hemodynamic results despite higher rates of paravalvular leaks. Therefore, SE TAVI devices could be considered as first choice in small aortic anatomy.
1. Introduction
Continuous development has improved the results of transcatheter aortic valve replacement (TAVR). Eligible surgical risk classes and volume of TAVR have expanded over years, and this technique has exceeded surgical aortic valve replacement (SAVR) in the US and European countries [1]. While prosthesis–patient mismatch (PPM) has been associated with impairment of long term survival following SAVR [2,3,4,5,6,7], particular attention is required for TAVR, considering that this technique became the first line aortic valve replacement strategy. In large cohorts, despite a lower incidence than in SAVR, PPM has been identified in a significant proportion of TAVR and particularly in patients with small aortic annuli [8,9]. The balloon-expandable (BE) valve and the self-expandable (SE) valve have been proven to be effective in the management of severe symptomatic aortic stenosis with some difference in hemodynamic results [10,11,12]. In this population of patients with small aortic annuli, valvular anatomic characteristics should perhaps dictate the type of valve to be used.
Therefore, our objective was to evaluate the hemodynamic performances of balloon-expandable (BE) versus two different self-expandable (SE) TAVR devices in patients with small aortic annulus defined by a computed tomography (CT) aortic annulus area between 330 and 440 mm2.
2. Materials and Methods
2.1. Study Population and Design
In La Timone Hospital, from June 2019 to April 2021, we prospectively enrolled all patients with a small aortic annulus between 330 and 440 mm2 on cardiac CT undergoing TAVI for severe symptomatic aortic stenosis. TAVR was performed using either a 23-mm Sapiens 3TM (Edwards Lifesciences, Irvine, CA, USA) balloon-expandable (BE) valve, an Accurate NeoTM S or M (Boston Scientific, Marlborough, MA, USA) or a 26- or 29-mm Evolut ProTM (Medtronic, Dublin, Ireland) self-expanding (SE) valve, according to physician preference. This study complied with the provisions of the Declaration of Helsinki and all patients provided written consent. All patients were over 18. The exclusion criteria were patients who did not receive a complete post-procedure echocardiography evaluation because of intraoperative or early postoperative death; incomplete ultrasound data not allowing calculation of the effective orifice area (EOA) of the prosthesis; and missing echocardiography data at 1 month of follow-up. As the patients were treated with commercially available devices (validated in those indications) we did not require an ethical committee for implantation of BE in patients with small aortic annuli. Of note, this study complied with the provisions of the Declaration of Helsinki and all patients provided written consent.
2.2. Procedure
Each patient underwent a multidisciplinary preoperative heart team evaluation combined with a CT scan to validate the indication for the procedure. Transfemoral access was used almost exclusively.
2.3. PPM Definition
According to the Valve Academic Research Consortium (VARC)-3 criteria [13], we defined the severity of PPM according to the indexed EOA (iEOA) of the prosthetic valve and classified PPM severity as: None or mild, >0.85 cm2/m2; moderate, between 0.85 and 0.65 cm2/m2; and severe, <0.65 cm2/m2.
2.4. Paravalvular Leak Definition
Aortic regurgitation (paravalvular leak) was assessed by using colourflow Doppler signal and graded in 5 groups: None or trivial (=0/4), mild (=1/4), mild-to-moderate (=2/4), moderate-to-severe (=3/4), or severe (=4/4).
2.5. Small Aortic Annulus Definition
We took as definition for small annuli the patients who could benefit from the smallest Sapiens 3 valve available in France (i.e., Sapiens 3 23 mm valve) according to the manufacturers’ labeling ranking (330–440 mm2).
2.6. Follow Up
Follow up was done at one month with clinical consultation and echocardiography. During clinical consultation, vital status and NYHA status were checked. We evaluated left ventricular ejection fraction (LVEF), effective orifice area (EOA), indexed EOA, PPM and grade of paravalvular leak.
2.7. Endpoints
The primary study endpoint was the occurrence of moderate or severe PPM at one month. The secondary endpoints were the occurrence of paravalvular leak ≥ 2 at one month and pacemaker implantation during the thirty-first days.
2.8. Statistical Analysis
Statistical analysis was performed using PASW Statistics version 18.0. Continuous variables were reported as means and standard deviation or as medians and range (according to their distribution), and categorical variables were reported as count and percentages. Standard two-sided tests were used to compare continuous characteristics (Student t or Mann–Whitney U tests) or categorical characteristics (chi-square or Fisher exact tests) among patient groups. For all tests, statistical significance was defined as p < 0.05.
3. Results
A total of 143 consecutive patients were included prospectively from between June 2019 and April 2021. Twelve patients were excluded (Figure 1). We finally studied 131 patients corresponding to 76 Sapiens 3TM 23 mm (58.0%), 26 Evolut ProTM (19.9%) and 29 Accurate NeoTM (22.1%). Mean age was 82.5 ± 7.06 years, 22.9% of patients were male and mean Euroscore was 3.9%. Transfemoral TAVR was performed in 99.2% of cases. There was no difference in baseline characteristics between groups (Table 1, Table 2 and Table 3). Mean AAA was non significantly different within the three groups (374 ± 27 mm2 for Sapiens 3383 ± 29 mm2 for Corevalve Evolut Pro and 389 ± 25 mm2 for Accurate Neo; p = 0.06). Postdilatation was performed in seven patients (zero Sapiens 3TM, four Accurate NeoTM and three Evolut ProTM).
3.1. Occurrence of Moderate or Severe PPM at One Month
Primary endpoint occurred for 30/76 patients (39.5%) in the Sapiens 3TM 23 mm group, 4/26 patients (15.4%) in the Evolut ProTM and 2/29 patients (6.9%) in the Accurate NeoTM group with a significant difference between the three groups (p < 0.0001). Interestingly, BE devices were associated with higher rates of moderate PPM (26.3%) with a significant difference (p = 0.008) and severe PPM (13.2%) without significant difference as compared to SE (Figure 2 and Figure 3).
Furthermore, mean gradients were higher in the Sapiens 3TM 23 mm group (13.9 ± 4.81 mmHg) than in the Evolut ProTM group (9.2 ± 3.92 mmHg) and in the Accurate NeoTM group (9.3 ± 3.42 mmHg) with a significant difference (p < 0.0001).
3.2. Occurrence of Paravalvular Leak at One Month and Pacemaker Implantation during the Thirty-First Days
Paravalvular leaks ≥ 2/4 were more often observed in the Evolut ProTM group (4/26; 15.4%) and in the Accurate NeoTM group (5/17; 17.2%) than in the Sapiens 3TM 23 mm group (2/76; 2.6%) with a significant difference between the three groups (p < 0.007) (Figure 2).
Pacemaker implantation during the thirty-first days was the same in the three group (Sapiens 3TM 23 mm 18.4%, Evolut ProTM 15.4%, Accurate NeoTM 17.2%) (p = 0.93) (Table 4).
4. Discussion
The main findings of this study are:
- (1)
- PPM was more often observed with BE TAVR than with SE TAVR and mean gradients were higher with BE TAVR
- (2)
- The majority of paravalvular leaks ≥ 2/4 occurred with SE TAVR compared to BE TAVR
PPM remains an under-explored complication of TAVR, which may be associated with worse clinical outcomes and accelerated structural valve deterioration [14]. Small aortic annuli are at particular risk of PPM, mostly when treated with intra-annular and bulkier devices, due to higher risk of overcrowding of the left ventricle outflow tract [15]. When considering BE TAVR, 23 mm size of the Sapiens 3 valve has been associated with significant incidence of PPM compared to larger sizes [8]. We confirmed that supra-annular TAVR design achieved larger iEOA and better hemodynamics in small aortic annuli, although our data are in favour of overall low risk of PPM. Our results corroborate those from the CHOICE randomized trial, with a more accurate definition of small aortic annulus based on CT and addition of a second SE TAVR device [16]. Hase et al. compared Sapiens 3 and Corevalve and showed that SE TAVR had better hemodynamic performance in small annuli [17]. Recently, studies have questioned the prognostic impact of mismatch in the global population of TAVR. Concerning SE valves, Tang et al. showed that the presence of a severe mismatch did not impact one-year mortality [18]. Conversely, for this type of valve, Leone et al. demonstrated that severe PPM had an impact on the prognosis of patients after TAVR (higher rates of all cause mortality) [19]. However, in light of our results, patients with a small aortic annulus seem to benefit from extensive screening. It will probably participate in the reduction of the occurrence of a mismatch and structural valve deterioration.
Another important finding of our study is the presence of a higher rate of paravalvular leaks with SE valves compared to the two BE TAVR. This finding is supported by the SOLVE TAVI study [12]. In these small anatomies, careful CT analysis could identify high-risk situations for PVL (aortic annuli with important calcifications).
Strength and Limitation
There were several limitations to this study, the most important one being its single center nature with a small study population.
Then, the echocardiography measurements, particularly the LVOT diameter and LVOT VTI assessment, are particularly challenging and may overestimate the incidence of PPM [20]. The use of predicted iEOA could allow to get rid of these echocardiography variabilities [21].
Moreover, our assessment of paravalvular leak in four grades may increase their severity compared to a definition based on five grades [13] which would explain the higher rates of paravalvular leaks in our study.
5. Conclusions
In small aortic annuli, SE TAVR devices did achieve better hemodynamic results despite higher rates of paravalvular leaks. Our work suggests that, in this population, SE TAVR design may be favoured. Indeed, there is a compromise to make in small aortic annuli between PVL and PPM and a special interest should be given to the choice of valve.
Author Contributions
Conceptualization, J.F., A.T., T.C. and P.D.; Data curation, J.F.; Investigation, J.F. and P.L.; Validation, A.P., P.M., P.L., N.J., V.G. and F.C.; Visualization, A.P., P.M., N.J., V.G. and F.C.; Writing—original draft, J.F. and P.D.; Writing—review & editing, A.T., T.C. and P.D. All authors have read and agreed to the published version of the manuscript.
Funding
This research received no external funding.
Institutional Review Board Statement
Ethics committee of the our institution approved the study protocol and publication of data.
Informed Consent Statement
The patients provided informed written consent for the publication.
Conflicts of Interest
TC reports consulting or speaker activities for Edwards, Boston Scientific and Med-tronic. All other authors declare no competing interests.
Abbreviations
| TAVR | transcatheter aortic valve replacement |
| SAVR | surgical aortic valve replacement |
| PPM | prosthesis–patient mismatch |
| BE | balloon-expandable |
| SE | self-expandable |
| CT | computed tomography |
| EOA | effective orifice area |
| LVEF | left ventricular ejection fraction |
| VARC | Valve Academic Research Consortium |
| iEOA | indexed EOA |
| LVOT | left ventricular outflow tract obstruction |
| LVOT VTI | left ventricular outflow tract obstruction velocity time integral |
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Figure 1.
Flow chart.
Figure 2.
Occurrence of moderate or severe PPM at one month according to balloon-expandable (Sapiens 3TM) vs. self-expandable (Evolut ProTM, Accurate NeoTM) TAVR devices.
Figure 2.
Occurrence of moderate or severe PPM at one month according to balloon-expandable (Sapiens 3TM) vs. self-expandable (Evolut ProTM, Accurate NeoTM) TAVR devices.
Figure 3.
Hemodynamic characteristics at 1 month after TAVR according to balloon-expandable (Sapiens 3TM) vs. self-expandable (Evolut ProTM, Accurate NeoTM) TAVR devices.
Figure 3.
Hemodynamic characteristics at 1 month after TAVR according to balloon-expandable (Sapiens 3TM) vs. self-expandable (Evolut ProTM, Accurate NeoTM) TAVR devices.
Table 1.
Patients’ characteristics at the baseline.
| Patient Characteristics at the Baseline | General Population n = 131 | Sapiens 3TM n = 76 | Evolut ProTM n = 26 | Accurate NeoTM n = 29 | p Value |
|---|---|---|---|---|---|
| Age-yr | 82.5 ± 7.06 | 82.45 ± 7.28 | 80.35 ± 6.96 | 84.59 ± 6.10 | 0.52 |
| Male sex–no (%) | 30/131 (22.90%) | 16/76 (21.05%) | 6/26 (23.08%) | 8/29 (27.59%) | 0.78 |
| Body surface–m2 | 1.74 ± 0.25 | 1.76 ± 0.31 | 1.68 ± 0.17 | 1.77 ± 0.20 | 0.63 |
| BMI-kg/m2 | 25.73 ± 4.76 | 25.24 ± 4.33 | 25.83 ± 4.07 | 26.93 ± 6.15 | 0.26 |
| EuroSCORE II | 3.92 ± 2.99 | 4.17 ± 3.05 | 3.52 ± 3.87 | 3.59 ± 1.73 | 0.51 |
| Diabetes mellitus-no./total no. (%) | 28/131 (21.37%) | 17/76 (22.37%) | 5/26 (19.23%) | 6/29 (20.69%) | 0.94 |
| Hypertension-no./total no. (%) | 91/131 (69.47%) | 55/76 (72.37%) | 17/26 (65.38%) | 19/29 (65.52%) | 0.70 |
| Dyslipidemia-no./total no. (%) | 68/131 (51.91%) | 42/76 (55.26%) | 12/26 (46.15%) | 14/29 (48.28%) | 0.79 |
| Dialysis-no./total no. (%) | 4/131 (3.05%) | 2/76 (2.63%) | 1/26 (3.85%) | 1/29 (3.45%) | 0.94 |
| COPD-no./total no. (%) | 17/131 (12.98%) | 10/76 (13.16%) | 2/26 (7.69%) | 5/29 (17.24%) | 0.57 |
| Smoke-no./total no. (%) | 42/131 (32.06%) | 25/76 (32.89%) | 7/26 (26.92%) | 10/29 (34.48%) | 0.81 |
| CAD-no./total no. (%) | 51/131 (38.93%) | 34/76 (44.74%) | 7/26 (26.92%) | 10/29 (34.48%) | 0.27 |
| Atrial fibrillation-no./total no. (%) | 46/131 (35.11%) | 28/76 (36.84%) | 8/26 (30.77%) | 10/29 (34.48%) | 0.85 |
| Cancer-no./total no. (%) | 23/131 (17.56%) | 13/76 (17.11%) | 4/26 (15.38%) | 6/29 (20.69%) | 0.86 |
| NYHA: | 0.31 | ||||
| 54/131 (41.22%) 63/131 (48.09%) 14/131 (10.69%) | 34/76 (44.74%) 32/76 (42.10%) 10/76 (13.16%) | 7/26 (26.92%) 17/26 (65.38%) 2/26 (7.69%) | 13/29 (44.83%) 14/29 (48.28%) 2/29 (6.90%) |
BMI: Body Mass Index; COPD: Chronic Obstructive Pulmonary Disease; CAD: Coronary artery Disease.
Table 2.
Echocardiography data at the baseline and access data.
| Echocardiography Data at the Baseline and Access Data | General Population n = 131 | Sapiens 3TM n = 76 | Evolut ProTM n = 26 | Accurate NeoTM n = 29 | p Value |
|---|---|---|---|---|---|
| LVEF-no./total no. (%) | 60.11 ± 11.82 | 60.83 ± 10.03 | 60.15 ± 10.74 | 63.28 ± 9.35 | 0.45 |
| Mean trans-aortic gradient-mmHg | 54.27 ± 15.37 | 55.18 ± 17.58 | 52.62 ± 11.75 | 53.38 ± 11.83 | 0.72 |
| EOA-cm2 | 0.68 ± 0.17 | 0.68 ± 0.17 | 0.68 ± 0.19 | 0.71 ± 0.17 | 0.66 |
| iEAO–cm2/m2 | 0.40 ± 0.11 | 0.40 ± 0.11 | 0.41 ± 0.10 | 0.40 ± 0.09 | 0.82 |
| Aortic annulus area-no./total no. (%) | 378.69 ± 27.45 | 373.76 ± 27.30 | 383.14 ± 29.00 | 383.76 ± 25.52 | 0.06 |
| Transfemoral access-no./total no. (%) | 128/131 (99.2%) | 75/76 (98.68%) | 26/26 (100%) | 29/29 (100%) | 0.70 |
LVEF: Left Ventricular Ejection Fraction; EOA: Effective Orifice Area; iEAO: indexed Effective Orifice Area.
Table 3.
Echocardiography data at one month.
| Echocardiography Data at One Month | General Population n = 131 | Sapiens 3TM n = 76 | Evolut ProTM n = 26 | Accurate NeoTM n = 29 | p Value |
|---|---|---|---|---|---|
| LVEF-% | 63.30 ± 8.06 | 62.78 ± 7.90 | 63.77 ± 10.16 | 64.24 ± 6.33 | 0.67 |
| Mean trans-aortic gradient-mmHg | 11.98 ± 4.92 | 13.92 ± 4.81 | 9.20 ± 3.92 | 9.31 ± 3.42 | <0.001 |
| EOA-cm2 | 1.83 ± 0.60 | 1.65 ± 0.48 | 1.98 ± 0.72 | 2.17 ± 0.64 | <0.001 |
| iEAO–cm2/m2 | 1.08 ± 0.35 | 0.98 ± 0.30 | 1.20 ± 0.40 | 1.22 ± 0.32 | <0.001 |
| PPM-no./total no. (%) | 36/131 (27.48%) | 30/76 (39.5%) | 4/26 (15.4%) | 2/29 (6.9%) | <0.001 |
| Moderate PPM-no./total no. (%) | 24/131 (18.32%) | 20/76 (26.3%) | 2/26 (7.7%) | 2/29 (6.9%) | 0.008 |
| Severe PPM-no./total no. (%) | 12/131 (9.16%) | 10/76 (13.2%) | 2/26 (7.7%) | 0/29 (0.0%) | 0.06 |
| Paravalvular leak ≥ 2-no./total no. (%) | 11/131 (8.40%) | 2/76 (2.6%) | 4/26 (15.4%) | 5/29 (17.2%) | 0.007 |
LVEF: Left Ventricular Ejection Fraction; EOA: Effective Orifice Area; iEAO: Indexed Effective Orifice Area; PPM: Prosthesis–Patient Mismatch.
Table 4.
Post-procedural complication.
| Post Procedural Complication | General Population n = 131 | Sapiens 3TM n = 76 | Evolut ProTM n = 26 | Accurate NeoTM n = 29 | p Value |
|---|---|---|---|---|---|
| Pacemaker-no./total no. (%) | 23/131 (17.56%) | 14/76 (18.42%) | 4/26 (15.38%) | 5/29 (17.2%) | 0.93 |
| Vascular complication-no./total no. (%) | 11/131 (8.40%) | 8/76 (10.5%) | 2/26 (7.69%) | 1/29 (3.4%) | - |
Bleeding complication-no./total no. (%)
| 9/131 (6.87%) 6/131 (4.58%) 2/131 (1.53%) | 6/76 (7.89%) 6/76 (7.89%) 0/76 (0.00%) | 2/26 (7.69%) 0/26 (0.00%) 2/26 (7.69%) | 1/29 (3.4%) 0/29 (0.00%) 1/29 (3.4%) | - |
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Ferrara, J.; Theron, A.; Porto, A.; Morera, P.; Luporsi, P.; Jaussaud, N.; Gariboldi, V.; Collart, F.; Cuisset, T.; Deharo, P. Prosthesis–Patient Mismatch in Small Aortic Annuli: Self-Expandable vs. Balloon-Expandable Transcatheter Aortic Valve Replacement. J. Clin. Med. 2022, 11, 1959. https://doi.org/10.3390/jcm11071959
AMA Style
Ferrara J, Theron A, Porto A, Morera P, Luporsi P, Jaussaud N, Gariboldi V, Collart F, Cuisset T, Deharo P. Prosthesis–Patient Mismatch in Small Aortic Annuli: Self-Expandable vs. Balloon-Expandable Transcatheter Aortic Valve Replacement. Journal of Clinical Medicine. 2022; 11(7):1959. https://doi.org/10.3390/jcm11071959
Chicago/Turabian StyleFerrara, Jerome, Alexis Theron, Alizee Porto, Pierre Morera, Paul Luporsi, Nicolas Jaussaud, Vlad Gariboldi, Frederic Collart, Thomas Cuisset, and Pierre Deharo. 2022. "Prosthesis–Patient Mismatch in Small Aortic Annuli: Self-Expandable vs. Balloon-Expandable Transcatheter Aortic Valve Replacement" Journal of Clinical Medicine 11, no. 7: 1959. https://doi.org/10.3390/jcm11071959
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