Myocardial Bridge and Atherosclerosis, an Intimal Relationship.

PURPOSE OF REVIEW: This review investigates the relationship between myocardial bridges (MBs), intimal thickening in coronary arteries, and Atherosclerotic cardiovascular disease. It focuses on the role of mechanical forces, such as circumferential strain, in arterial wall remodeling and aims to clarify how MBs affect coronary artery pathology. REVIEW FINDINGS: MBs have been identified as influential in modulating coronary artery intimal thickness, demonstrating a protective effect against thickening within the MB segment and an increase in thickness proximal to the MB. This is attributed to changes in mechanical stress and hemodynamics. Research involving arterial hypertension models and vein graft disease has underscored the importance of circumferential strain in vascular remodeling and intimal hyperplasia. Understanding the complex dynamics between MBs, mechanical strain, and vascular remodeling is crucial for advancing our knowledge of coronary artery disease mechanisms. This could lead to improved management strategies for cardiovascular diseases, highlighting the need for further research into MB-related vascular changes.

Incidence, Predictors, and Outcomes of Paravalvular Regurgitation after TAVR in Sievers Type-1 Bicuspid Aortic Valves.

BACKGROUND: Transcatheter aortic valve replacement (TAVR) in patients with bicuspid aortic valve (BAV) stenosis is technically challenging and is burdened by an increased risk of paravalvular regurgitation (PVR). OBJECTIVES: To identify the incidence, predictors, and clinical outcomes of PVR following TAVR in Sievers type 1 BAV stenosis. METHODS: Consecutive patients with severe Sievers type 1 BAV stenosis undergoing TAVR with current generation transcatheter heart valves (THVs) in 24 international centres were enrolled. PVR was graded as none/trace, mild, moderate, and severe according to echocardiographic criteria. The endpoint of major adverse events (MAE), defined as a composite of all-cause death, stroke, or hospitalization for heart failure, was assessed at the last available follow-up. RESULTS: A total of 946 patients were enrolled. PVR occurred in 423 patients (44.7%): mild, moderate, and severe in 387 (40.9%), 32 (3.4%), and 4 (0.4%) patients, respectively. Independent predictors of moderate or severe PVR were larger virtual raphe ring (VRR) perimeter (ORadj 1.07, 95% CI 1.02-1.13), severe annular or left ventricular outflow tract (LVOT) calcification (ORadj 5.21, 95% CI 1.45-18.77), self-expanding valve (ORadj 9.01, 95% CI 2.09-38.86), and intentional supra-annular THV positioning (ORadj 3.31, 95% CI 1.04-10.54). At a median follow-up of 1.3 [IQR 0.5-2.4] years, moderate or severe PVR was associated with an increased risk of MAE (HRadj 2.52, 95% CI 1.24-5.09). CONCLUSIONS: After TAVR with current-generation THVs in Sievers type 1 BAV stenosis, moderate or severe PVR occurred in about 4% of cases and was associated with an increased risk of MAE during follow-up.

Short-Term Outcomes of ACURATE neo2.

Inferior outcomes with ACURATE neo, a self-expanding transcatheter heart valve (THV) for the treatment of severe aortic stenosis, were mainly driven by higher rates of moderate/severe paravalvular leak (PVL). To overcome this limitation, the next-generation ACURATE neo2 features a 60% larger external sealing skirt. Data on long-term performance are limited; however, clinical evidence suggests improved short-term performance which is comparable to contemporary THVs. This report reviews data on short-term clinical and echocardiographic outcomes of ACURATE neo2. A PubMed search yielded 13 studies, including 5 single arm and 8 nonrandomized comparative studies with other THVs which reported in-hospital or 30-day clinical and echocardiographic outcomes. In-hospital or 30-day all-cause mortality was ≤3.3%, which is comparable to other contemporary THVs. The rates of postprocedural ≧moderate PVL ranged 0.6%-4.7%. In multicenter propensity-matched analyses, neo2 significantly reduced the rate of ≧moderate PVL compared to neo (3.5% vs. 11.3%, p < 0.01), whereas rates were comparable to Evolut Pro/Pro+ (Neo2: 2.0% vs. Pro/Pro+: 3.1%, p = 0.28) and SAPIEN 3 Ultra (Neo2: 0.6% vs. Ultra: 1.1%, p = 0.72). The rate of permanent pacemaker implantation with neo2 was consistently low (3.3%-8.6%) except in one study, and in propensity-matched analyses were significantly lower than Evolut Pro/Pro+ (6.7% vs. 16.7%, p < 0.01), and comparable to SAPIEN 3 Ultra (8.1% vs. 10.3%, p = 0.29). In conclusion, ACURATE neo2 showed better short-term performance by considerably reducing PVL compared to its predecessor, with short-term clinical and echocardiographic outcomes comparable to contemporary THVs.

Comparison of two self-expanding transcatheter heart valves for degenerated surgical bioprostheses: the AVENGER multicentre registry.

BACKGROUND: There is a lack of comparative data on transcatheter aortic valve implantation (TAVI) in degenerated surgical prostheses (valve-in-valve [ViV]). AIMS: We sought to compare outcomes of using two self-expanding transcatheter heart valve (THV) systems for ViV. METHODS: In this retrospective multicentre registry, we included consecutive patients undergoing transfemoral ViV using either the ACURATE neo/neo2 (ACURATE group) or the Evolut R/PRO/PRO+ (EVOLUT group). The primary outcome measure was technical success according to Valve Academic Research Consortium (VARC)-3. Secondary outcomes were 30-day all-cause mortality, device success (VARC-3), coronary obstruction (CO) requiring intervention, rates of severe prosthesis-patient mismatch (PPM), and aortic regurgitation (AR) ≥moderate. Comparisons were made after 1:1 propensity score matching. RESULTS: The study cohort comprised 835 patients from 20 centres (ACURATE n=251; EVOLUT n=584). In the matched cohort (n=468), technical success (ACURATE 92.7% vs EVOLUT 88.9%; p=0.20) and device success (69.7% vs 73.9%; p=0.36) as well as 30-day mortality (2.8% vs 1.6%; p=0.392) were similar between the two groups. The mean gradients and rates of severe PPM, AR ≥moderate, or CO did not differ between the groups. Technical and device success were higher for the ACURATE platform among patients with a true inner diameter (ID) >19 mm, whereas a true ID ≤19 mm was associated with higher device success - but not technical success - among Evolut recipients. CONCLUSIONS: ViV TAVI using either ACURATE or Evolut THVs showed similar procedural outcomes. However, a true ID >19 mm was associated with higher device success among ACURATE recipients, whereas in patients with a true ID ≤19 mm, device success was higher when using Evolut.

Procedural success in transaxillary transcatheter aortic valve implantation according to type of transcatheter heart valve: results from the multicenter TAXI registry.

BACKGROUND: Transaxillary (TAx) transcatheter aortic valve implantation (TAVI) is a preferred alternative access in patients ineligible for transfemoral TAVI. AIMS: This study used the Trans-AXillary Intervention (TAXI) registry to compare procedural success according to different types of transcatheter heart valves (THV). METHODS: For the TAXI registry anonymized data of patients treated with TAx-TAVI were collected from 18 centers. Acute procedural, early and 1-month clinical outcomes were adjudicated in accordance with standardized VARC-3 definitions. RESULTS: From 432 patients, 368 patients (85.3%, SE group) received self-expanding (SE) THV and 64 patients (14.8%, BE group) received balloon-expandable (BE) THV. Imaging revealed lower axillary artery diameters in the SE group (max/min diameter in mm: 8.4/6.6 vs 9.4/6.8 mm; p < 0.001/p = 0.04) but a higher proportion of axillary tortuosity in BE group (62/368, 23.6% vs 26/64, 42.6%; p = 0.004) with steeper aorta-left ventricle (LV) inflow (55° vs 51°; p = 0.002) and left ventricular outflow tract (LVOT)-LV inflow angles (40.0° vs 24.5°; 0.002). TAx-TAVI was more often conducted by right sided axillary artery in the BE group (33/368, 9.0% vs 17/64, 26.6%; p < 0.001). Device success was higher in the SE group (317/368, 86.1% vs 44/64, 68.8%, p = 0.0015). In logistic regression analysis, BE THV were a risk factor for vascular complications and axillary stent implantation. CONCLUSIONS: Both, SE and BE THV can be safely used in TAx-TAVI. However, SE THV were more often used and were associated with a higher rate of device success. While SE THV were associated with lower rates of vascular complications, BE THV were more often used in cases with challenging anatomical circumstances.

Procedural and one-year outcomes following drug-eluting stent and drug-coated balloon combination for the treatment of de novo diffuse coronary artery disease: the HYPER Study.

BACKGROUND: De novo diffuse coronary artery disease (CAD) is a challenging scenario in interventional cardiology with limited treatment option, beside stent implantation. In this context, a hybrid approach, combining the use of drug-eluting stent (DES) and drug-coated balloon (DCB) to treat different segments of the same lesion (e.g. long lesion and/or true bifurcation), might be an interesting and alternative strategy to limit the metal amount. The aim of this study was to evaluate the safety and efficacy of a hybrid approach in addressing percutaneous treatment of de novo diffuse CAD. METHODS: This was a prospective, multicenter study including patients affected by de novo diffuse CAD treated with a hybrid approach from April 2019 to December 2020. Angiographic and clinical data were collected. The primary endpoint was the one-year device-oriented composite endpoint (DOCE, cardiac death, target vessel myocardial infarction and ischemia-driven target lesion revascularization [ID-TLR]). Periprocedural myocardial infarctions and periprocedural success were included among secondary endpoints. RESULTS: One hundred six patients were included, mean age was 68.2±10.2 years and 78.3% were male. De novo diffuse CAD consisted of 52.8% long lesions and 47.2% true bifurcation lesions. Significant increase in the final minimal lumen diameters and significant decrease in the final diameter stenosis were observed when compared to the baseline values in both DES- and DCB-target segments. Procedural success was 96.2%. DOCE at one-year was 3.7%, with all the adverse events characterized by ID-TLR. CONCLUSIONS: Combination of DES and DCB could be a safe and effective treatment option for the treatment of de novo diffuse CAD (NCT03939468).

Comparison of ultrasound- versus fluoroscopy-guidEd femorAl access In tranS-catheter aortic valve replacement In the Era of contempoRary devices: The EASIER registry.

BACKGROUND: Vascular complications (VCs) still represent one of the principal concerns of trans-femoral trans-catheter aortic valve replacement (TF-TAVR). New-generation devices can minimize such complications but the arterial access management is left to the operator's choice. This study aims to describe the rate of VCs in a contemporary cohort of patients undergoing TAVR with new-generation devices and to determine whether an ultrasound-guided (USG) vs. a fluoroscopy-guided (FG) femoral access management has an impact on their prevention. METHODS: This is a prospective, observational, multicenter study. Consecutive patients undergoing TAVR with new-generation devices were analyzed from January 2022 to October 2022 in five tertiary care centers. Femoral accesses were managed according to the operator's preferences. All the patients underwent a pre-discharge peripheral ultrasound control. VCs and bleedings were the main endpoints of interest. RESULTS: A total of 458 consecutive patients were enrolled (274 in the USG group and 184 in the FG group). VCs occurred in 6.5 % of the patients (5.2 % minor and 1.3 % major). There was no difference between the USG and the FG groups in terms of any VCs (7.3 % vs. 5.4 %; p = 0.4), or any VARC-3 bleedings (6.9 % vs 6 %, p = 0.9). At logistic regression analysis, the two guidance strategies did not result as predictors of VCs (odds Ratio 0.8, 95 % Confidence Interval 0.46-1.4; P = 0.4). CONCLUSIONS: In a contemporary cohort of patients undergoing TAVR with new-generation devices, the occurrence of VCs is low and mostly represented by minor VCs. USG and FG modalities did not affect the rate of VCs.

Epidemiology and geographic clustering of Erdheim-Chester disease in Italy and France.

This geoepidemiological study, performed in Italy and France, shows that Erdheim-Chester disease is increasingly diagnosed and cases cluster in specific geographic areas, namely southern Italy and central France. Disease frequency inversely correlates with the Human Development Index.

Ping-pong snaring of a totally dislodged stent across left main ostium: "All is not lost".

Undeployed stent loss is a rare but potentially serious complication of percutaneous coronary intervention. Its management is not assisted by well-defined guidelines, and it is made even more difficult when the dislodged stent is not protected by in situ guidewire. In this work, we present the case of a total stent loss with a crushed device protruding out of the left main. In this hopeless circumstance, an innovative ping-pong technique was used to contralaterally perform a successful stent retrieval.

Transcatheter aortic valve replacement with the self-expanding ACURATE Neo2 in patients with horizontal aorta: Insights from the ITAL-neo registry.

BACKGROUND: Horizontal aorta (HA), defined by an aortic angulation (AA) ≥48°, is associated with worse outcomes particularly after self-expanding (SE) trans-catheter heart valve (THV) implantation. Although the SE ACURATE Neo THV demonstrated favorable procedural success rates in patients with HA, it remains associated with a non-negligible rate of moderate or greater paravalvular leak (PVL). OBJECTIVES: Aim of the study was to assess the performance of ACURATE Neo2 in the setting of HA. METHODS: We performed a multicenter cohort analysis on patients with severe aortic valve stenosis and HA undergoing transcatheter aortic valve replacement (TAVR) with the Neo or Neo2 THV enrolled in the ITAL-neo registry. The primary endpoint was a composite of early safety and clinical efficacy at 30 days according to the Valve Academic Research Consortium-3 (VARC-3). Secondary endpoints included the occurrence of moderate or severe PVL and 90-day clinical outcomes. RESULTS: Among 900 patients included in the ITAL-neo registry, 407 exhibited HA; of these, 300 received a Neo THV and 107 a Neo2 THV. HA, irrespective of the THV implanted, emerged as an independent risk factor for developing ≥ moderate PVL. Technical and device success at 30-day follow-up was comparable between groups. However, Neo2 was associated with a significantly lower rate of ≥moderate PVL vs. Neo: (5% vs. 15%; p < 0.001), which was confirmed also at 90-day follow-up. Additionally, no correlation was found between ≥moderate PVL and AA in the Neo2 group, while PVL degree increased proportionally to the AA in the Neo cohort. CONCLUSION: In patients with HA, the new generation Acurate Neo2 THV was associated with a comparable device success rate and a significantly lower rate of ≥moderate PVL, when compared with its predecessor.

Impact of Complete Revascularization on Development of Heart Failure in Patients With Acute Coronary Syndrome and Multivessel Disease: A Subanalysis of the CORALYS Registry.

Background The impact of complete revascularization (CR) on the development of heart failure (HF) in patients with acute coronary syndrome and multivessel coronary artery disease undergoing percutaneous coronary intervention remains to be elucidated. Methods and Results Consecutive patients with acute coronary syndrome with multivessel coronary artery disease from the CORALYS (Incidence and Predictors of Heart Failure After Acute Coronary Syndrome) registry were included. Incidence of first hospitalization for HF or cardiovascular death was the primary end point. Patients were stratified according to completeness of coronary revascularization. Of 14 699 patients in the CORALYS registry, 5054 presented with multivessel disease. One thousand four hundred seventy-three (29.2%) underwent CR, while 3581 (70.8%) did not. Over 5 years follow-up, CR was associated with a reduced incidence of the primary end point (adjusted hazard ratio [HR], 0.66 [95% CI, 0.51-0.85]), first HF hospitalization (adjusted HR, 0.67 [95% CI, 0.49-0.90]) along with all-cause death and cardiovascular death alone (adjusted HR, 0.74 [95% CI, 0.56-0.97] and HR, 0.56 [95% CI, 0.38-0.84], respectively). The results were consistent in the propensity-score matching population and in inverse probability treatment weighting analysis. The benefit of CR was consistent across acute coronary syndrome presentations (HR, 0.59 [95% CI, 0.39-0.89] for ST-segment elevation myocardial infarction and HR, 0.71 [95% CI, 0.50-0.99] for non-ST-elevation acute coronary syndrome) and in patients with left ventricular ejection fraction >40% (HR, 0.52 [95% CI, 0.37-0.72]), while no benefit was observed in patients with left ventricular ejection fraction ≤40% (HR, 0.77 [95% CI, 0.37-1.10], P for interaction 0.04). Conclusions CR after acute coronary syndrome reduced the risk of first hospitalization for HF and cardiovascular death, as well as first HF hospitalization, and cardiovascular and overall death both in patients with ST-segment elevation myocardial infarction and non-ST-elevation acute coronary syndrome. Registration URL: https://www.clinicaltrials.gov; Unique identifier: NCT04895176.

Incidence, Predictors, and Prognostic Impact of New Permanent Pacemaker Implantation After TAVR With Self-Expanding Valves.

OBJECTIVES: The authors sought to evaluate the incidence, predictors, and outcomes of new permanent pacemaker implantation (PPI) after transcatheter aortic valve replacement (TAVR) with contemporary self-expanding valves (SEV). BACKGROUND: Need for PPI is frequent post-TAVR, but conflicting data exist on new-generation SEV and on the prognostic impact of PPI. METHODS: This study included 3,211 patients enrolled in the multicenter NEOPRO (A Multicenter Comparison of Acurate NEO Versus Evolut PRO Transcatheter Heart Valves) and NEOPRO-2 (A Multicenter Comparison of ACURATE NEO2 Versus Evolut PRO/PRO+ Transcatheter Heart Valves 2) registries (January 2012 to December 2021) who underwent transfemoral TAVR with SEV. Implanted transcatheter heart valves (THV) were Acurate neo (n = 1,090), Acurate neo2 (n = 665), Evolut PRO (n = 1,312), and Evolut PRO+ (n = 144). Incidence and predictors of new PPI and 1-year outcomes were evaluated. RESULTS: New PPI was needed in 362 patients (11.3%) within 30 days after TAVR (8.8%, 7.7%, 15.2%, and 10.4%, respectively, after Acurate neo, Acurate neo2, Evolut PRO, and Evolut PRO+). Independent predictors of new PPI were Society of Thoracic Surgeons Predicted Risk of Mortality score, baseline right bundle branch block and depth of THV implantation, both in patients treated with Acurate neo/neo2 and in those treated with Evolut PRO/PRO+. Predischarge reduction in ejection fraction (EF) was more frequent in patients requiring PPI (P = 0.014). New PPI was associated with higher 1-year mortality (16.9% vs 10.8%; adjusted HR: 1.66; 95% CI: 1.13-2.43; P = 0.010), particularly in patients with baseline EF <40% (P for interaction = 0.049). CONCLUSIONS: New PPI was frequently needed after TAVR with SEV (11.3%) and was associated with higher 1-year mortality, particularly in patients with EF <40%. Baseline right bundle branch block and depth of THV implantation independently predicted the need of PPI.

Incidence, predictors, and prognostic impact of new permanent pacemaker implantation after TAVR with self-expanding valves

OBJECTIVES: The authors sought to evaluate the incidence, predictors, and outcomes of new permanent pacemaker implantation (PPI) after transcatheter aortic valve replacement (TAVR) with contemporary self-expanding valves (SEV). BACKGROUND: Need for PPI is frequent post-TAVR, but conflicting data exist on new-generation SEV and on the prognostic impact of PPI. METHODS: This study included 3,211 patients enrolled in the multicenter NEOPRO (A Multicenter Comparison of Acurate NEO Versus Evolut PRO Transcatheter Heart Valves) and NEOPRO-2 (A Multicenter Comparison of ACURATE NEO2 Versus Evolut PRO/PRO+ Transcatheter Heart Valves 2) registries (January 2012 to December 2021) who underwent transfemoral TAVR with SEV. Implanted transcatheter heart valves (THV) were Acurate neo (n = 1,090), Acurate neo2 (n = 665), Evolut PRO (n = 1,312), and Evolut PRO+ (n = 144). Incidence and predictors of new PPI and 1-year outcomes were evaluated. RESULTS: New PPI was needed in 362 patients (11.3%) within 30 days after TAVR (8.8%, 7.7%, 15.2%, and 10.4%, respectively, after Acurate neo, Acurate neo2, Evolut PRO, and Evolut PRO+). Independent predictors of new PPI were Society of Thoracic Surgeons Predicted Risk of Mortality score, baseline right bundle branch block and depth of THV implantation, both in patients treated with Acurate neo/neo2 and in those treated with Evolut PRO/PRO+. Predischarge reduction in ejection fraction (EF) was more frequent in patients requiring PPI (P = 0.014). New PPI was associated with higher 1-year mortality (16.9% vs 10.8%; adjusted HR: 1.66; 95% CI: 1.13-2.43; P = 0.010), particularly in patients with baseline EF <40% (P for interaction = 0.049). CONCLUSIONS: New PPI was frequently needed after TAVR with SEV (11.3%) and was associated with higher 1-year mortality, particularly in patients with EF <40%. Baseline right bundle branch block and depth of THV implantation independently predicted the need of PPI.

Secondary prevention and follow-up of patients with ACS and not-at-target LDL: An Italian real-world retro-prospective analysis by the inertia group.

Background: In patients with recent ACS, the latest ESC/EAS guidelines for management of dyslipidaemia recommend intensification of LDL-C-lowering therapy. Objective: Report a real-world picture of lipid-lowering therapy prescribed and cholesterol targets achieved in post-ACS patients before and after a specific educational program. Methods: Retrospective data collection prior to the educational course and prospective data collection after the course of consecutive very high-risk patients with ACS admitted in 2020 in 13 Italian cardiology departments, and with a non-target LDL-C level at discharge. Results: Data from 336 patients were included, 229 in the retrospective phase and 107 in the post-course prospective phase. At discharge, statins were prescribed in 98.1% of patients, alone in 62.3% of patients (65% of which at high doses) and in combination with ezetimibe in 35.8% of cases (52% at high doses). A significant reduction was obtained in total and LDL cholesterol (LDL-C) from discharge to the first control visit. Thirty-five percent of patients achieved a target LDL-C <55 mg/dL according to ESC 2019 guidelines. Fifty percent of patients achieved the <55 mg/dL target for LDL-C after a mean of 120 days from the ACS event. Conclusions: Our analysis, though numerically and methodologically limited, suggests that management of cholesterolaemia and achievement of LDL-C targets are largely suboptimal and need significant improvement to comply with the lipid-lowering guidelines for very high CV risk patients. Earlier high intensity statin combination therapy should be encouraged in patients with high residual risk.

Clinical outcomes in women and men with small aortic annuli undergoing transcatheter aortic valve implantation: A multicenter, retrospective, propensity score-matched comparison.

BACKGROUND: Sex-specific characteristics in patients with aortic stenosis and small annuli undergoing transcatheter aortic valve implantation (TAVI) might affect clinical outcomes and hemodynamics. METHODS: TAVI-SMALL 2 international retrospective registry included 1378 patients with severe aortic stenosis and small annuli (annular perimeter <72 mm or area < 400 mm2) treated with transfemoral TAVI at 16 high-volume centers between 2011 and 2020. Women (n = 1233) were compared with men (n = 145). One-to-one propensity score (PS) matching resulted in 99 pairs. Primary endpoint was incidence of all-cause mortality. Incidence of pre-discharge severe prosthesis-patient mismatch (PPM) and its association with all-cause mortality were investigated. Binary logistic and Cox regression were performed to adjust the treatment effect for PS quintiles. RESULTS: Incidence of all-cause mortality at a median follow-up of 377 days did not differ between sex in the overall (10.3 vs. 9.8%, p = 0.842) and PS-matched (8.5 vs. 10.9%, p = 0.586) populations. After PS matching, pre-discharge severe PPM was numerically higher in women vs. men (10.2 vs. 4.3%), even though no evidence of a difference was found (p = 0.275). Within the overall population, women with severe PPM suffered a higher incidence of all-cause mortality when compared to those with less than moderate PPM (log-rank p = 0.024) and less than severe PPM (p = 0.027). CONCLUSIONS: No difference in all-cause mortality at medium-term follow-up was observed between women and men with aortic stenosis and small annuli undergoing TAVI. Incidence of pre-discharge severe PPM was numerically higher in women than men, and it was associated with increased all-cause mortality in women.

Implantation of contemporary transcatheter aortic valves in small aortic annuli: the international multicentre TAVI-SMALL 2 registry.

BACKGROUND: Treatment of aortic stenosis in patients with small annuli is challenging and can result in prosthesis-patient mismatch (PPM). AIMS: We aimed to compare the forward flow haemodynamics and clinical outcomes of contemporary transcatheter valves in patients with small annuli. METHODS: The TAVI-SMALL 2 international retrospective registry included 1,378 patients with severe aortic stenosis and small annuli (annular perimeter <72 mm or area <400 mm2) treated with transfemoral self-expanding (SEV; n=1,092) and balloon-expandable valves (BEV; n=286) in 16 high-volume centres between 2011 and 2020. Analyses comparing SEV versus BEV and supra-annular (SAV; n=920) versus intra-annular valves (IAV; n=458) included inverse probability of treatment weighting (IPTW). The primary endpoints were the predischarge mean aortic gradient and incidence of severe PPM. The secondary endpoint was the incidence of more than mild paravalvular leak (PVL). RESULTS: The predischarge mean aortic gradient was lower after SAV versus IAV (7.8±3.9 vs 12.0±5.1; p<0.001) and SEV versus BEV implantation (8.0±4.1 vs 13.6±4.7; p<0.001). Severe PPM was more common with IAV and BEV when compared to SAV and SEV implantation, respectively, (8.8% vs 3.6%; p=0.007 and 8.7% vs 4.6%; p=0.041). At multivariable logistic regression weighted by IPTW, SAV protected from severe PPM regardless of its definition. More than mild PVL occurred more often with SEV versus BEV (11.6% vs 2.6%; p<0.001). CONCLUSIONS: In small aortic annuli, implantation of SAV and SEV was associated with a more favourable forward haemodynamic profile than after IAV and BEV implantation, respectively. More than mild PVL was more common after SEV than BEV implantation.