Background Minimally invasive surgical procedures (MIS) may offer several advantages over conventional full sternotomy (FS) aortic valve replacement (AVR). A novel class of aortic valve prostheses ...has been developed for rapid-deployment AVR (RDAVR). We report a randomized, multicenter trial comparing the outcomes for MIS-RDAVR with those of conventional FS-AVR. Methods A total of 100 patients with aortic stenosis were enrolled in a prospective, multicenter, randomized comparison trial (CADENCE-MIS). Exclusion criteria included ejection fraction below 25%, AVR requiring concomitant procedures, and recent myocardial infarction or stroke. Patients were randomized to undergo MIS-RDAVR through an upper hemisternotomy (n = 51) or AVR by FS with a conventional stented bioprosthesis (n = 49). Three patients were excluded before the procedure, and 3 more patients who were randomized to undergo RDAVR were excluded because of their anatomy. Procedural, early clinical outcomes, and functional outcomes were assessed for the remaining 94 patients. Hemodynamic performance was assessed by an echocardiography core laboratory. Results Implanted valve sizes were similar between groups (22.9 ± 2.1 vs 23.0 ± 2.1 mm, p = 0.9). MIS-RDAVR was associated with significantly reduced aortic cross-clamp times compared with FS-AVR (41.3 ± 20.3 vs 54.0 ± 20.3 minutes, p < 0.001), although cardiopulmonary bypass times were similar (68.8 ± 29.0 vs 74.4 ± 28.4 minutes, p = 0.21). Early clinical outcomes were similar between the two groups, including quality of life measures. The RDAVR patients had a significantly lower mean transvalvular gradient (8.5 vs 10.3 mm Hg, p = 0.044) and a lower prevalence of patient–prosthesis mismatch (0% vs 15.0%, p = 0.013) 3 months postoperatively compared with the FS-AVR patients. Conclusions RDAVR by the MIS approach is associated with significantly reduced myocardial ischemic time and better valvular hemodynamic function than FS-AVR with a conventional stented bioprosthesis. Rapid deployment valves may facilitate the performance of MIS-AVR.
Genome-wide association studies (GWAS) for atrial fibrillation (AF) have uncovered numerous disease-associated variants. Their underlying molecular mechanisms, especially consequences for mRNA and ...protein expression remain largely elusive. Thus, refined multi-omics approaches are needed for deciphering the underlying molecular networks. Here, we integrate genomics, transcriptomics, and proteomics of human atrial tissue in a cross-sectional study to identify widespread effects of genetic variants on both transcript (cis-eQTL) and protein (cis-pQTL) abundance. We further establish a novel targeted trans-QTL approach based on polygenic risk scores to determine candidates for AF core genes. Using this approach, we identify two trans-eQTLs and five trans-pQTLs for AF GWAS hits, and elucidate the role of the transcription factor NKX2-5 as a link between the GWAS SNP rs9481842 and AF. Altogether, we present an integrative multi-omics method to uncover trans-acting networks in small datasets and provide a rich resource of atrial tissue-specific regulatory variants for transcript and protein levels for cardiovascular disease gene prioritization.
Human embryonic stem cell (hESC) progenies hold great promise as surrogates for human primary cells, particularly if the latter are not available as in the case of cardiomyocytes. However, high ...content experimental platforms are lacking that allow the function of hESC-derived cardiomyocytes to be studied under relatively physiological and standardized conditions. Here we describe a simple and robust protocol for the generation of fibrin-based human engineered heart tissue (hEHT) in a 24-well format using an unselected population of differentiated human embryonic stem cells containing 30-40% α-actinin-positive cardiac myocytes. Human EHTs started to show coherent contractions 5-10 days after casting, reached regular (mean 0.5 Hz) and strong (mean 100 µN) contractions for up to 8 weeks. They displayed a dense network of longitudinally oriented, interconnected and cross-striated cardiomyocytes. Spontaneous hEHT contractions were analyzed by automated video-optical recording and showed chronotropic responses to calcium and the β-adrenergic agonist isoprenaline. The proarrhythmic compounds E-4031, quinidine, procainamide, cisapride, and sertindole exerted robust, concentration-dependent and reversible decreases in relaxation velocity and irregular beating at concentrations that recapitulate findings in hERG channel assays. In conclusion this study establishes hEHT as a simple in vitro model for heart research.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Objectives
We present 1‐year outcomes of the post‐market registry of a next‐generation transcatheter heart valve used for aortic regurgitation (AR).
Background
Transcatheter aortic valve replacement ...(TAVR) is routine in high‐risk patients with aortic stenosis but is not recommended for AR. The JenaValve™ (JenaValve Technology GmbH, Munich, Germany) overcomes technical challenges in AR patients through a leaflet clipping mechanism.
Methods
The JenaValve EvalUation of Long Term Performance and Safety In PaTients with SEvere Aortic Stenosis oR Aortic Insufficiency (JUPITER) Registry is a European study to evaluate safety and effectiveness of this THV. From 2012‐2015, 30 patients with AR were enrolled.
Results
Mean age was 74.4 ± 9.3 years. Procedural success was 96.7% (29/30). One patient was converted to open surgery. No annular rupture or coronary ostia obstruction occurred. Mortality at 30 days was 10.0% (3/30). Combined safety endpoint was met in 13.3% (4/30). Paravalvular regurgitation was not present/trivial in 84.6% (22/26) and mild in 15.4% (4/26). Rate of permanent pacemaker implantation was 3.8% (1/26). One‐year Kaplan‐Meier survival was 79.9%, one‐year combined efficacy was 73.1% (19/30). No further strokes were observed during 1 year of follow‐up.
Conclusions
The JenaValve overcomes technical challenges of TAVR in AR through a clipping mechanism. We report satisfactory outcomes of a multicenter registry using the JenaValve for predominant AR, as rate of THV embolization, residual AR and permanent pacemaker implantation was low. One‐year results using the JenaValve for AR encourage its use for this indication.
Abstract Objectives This analysis reports on the initial German multicenter experience with the JenaValve (JenaValve Technology GmbH, Munich, Germany) transcatheter heart valve for the treatment of ...pure aortic regurgitation. Background Experience with transcatheter aortic valve implantation (TAVI) for severe aortic regurgitation is limited due to the risk of insufficient anchoring of the valve stent within the noncalcified aortic annulus. Methods Transapical TAVI with a JenaValve for the treatment of severe aortic regurgitation was performed in 31 patients (age 73.8 ± 9.1 years) in 9 German centers. All patients were considered high risk for surgery (logistic EuroSCORE European System for Cardiac Operative Risk Evaluation 23.6 ± 14.5%) according to a local heart team consensus. Procedural results and clinical outcomes up to 6 months were analyzed. Results Implantation was successful in 30 of 31 cases (aortic annulus diameter 24.7 ± 1.5 mm); transcatheter heart valve dislodgement necessitated valve-in-valve implantation in 1 patient. Post-procedural aortic regurgitation was none/trace in 28 of 31 and mild in 3 of 31 patients. During follow-up, 2 patients underwent valvular reinterventions (surgical aortic valve replacement for endocarditis, valve-in-valve implantation for increasing paravalvular regurgitation). All-cause mortality was 12.9% and 19.3% at 30 days and 6 months, respectively. In the remaining patients, a significant improvement in New York Heart Association class was observed and persisted up to 6 months after TAVI. Conclusions Aortic regurgitation remains a challenging pathology for TAVI. After initial demonstration of feasibility, this multicenter study revealed the JenaValve transcatheter heart valve as a reasonable option in this subset of patients. However, a significant early noncardiac mortality related to the high-risk population emphasizes the need for careful patient selection.
Objectives This study reports the results of a series of transapical mitral valve-in-valve implantations and aims to offer guidance on technical aspects of the procedure. Background Mitral valve ...reoperations due to failing bioprostheses are associated with high morbidity and mortality. Transcatheter techniques may evolve as complementary approaches to surgery in these high-risk patients. Methods Six patients (age 75 ± 15 years) received transapical implantation of a balloon-expandable pericardial heart valve into a degenerated bioprosthesis (range 27 to 31 mm) in mitral position at our institution. All patients were considered high risk for surgical valve replacement (logistic EuroSCORE: 33 ± 15%) after evaluation by an interdisciplinary heart team. Procedural and clinical outcomes were analyzed. Results Implantation was successful in all patients with reduction of mean transvalvular gradients from 11.3 ± 5.2 mm Hg to 5.5 ± 3.6 mm Hg (p = 0.016) and median regurgitation from grade 3.0 (interquartile range IQR: 2.7 to 3.1) to 0 (IQR: 0 to 1.0, p = 0.033) with trace paravalvular regurgitation remaining in 2 patients. Apical bleeding occurred in 2 patients requiring rethoracotomy in 1 and resuscitation in a second patient, the latter of whom died on postoperative day 6. In the remaining patients, median New York Heart Association functional class improved from 3.0 (IQR: 3.0 to 3.5) to 2.0 (IQR: 1.5 to 2.0, p = 0.048) over a median follow-up of 70 (IQR: 25.5 to 358) days. Conclusions With acceptable results in a high-risk population, transapical mitral valve-in-valve implantation can be considered as a complementary approach to reoperative mitral valve surgery in select patients.
Background
Heyde syndrome (HS) is known as the association of severe aortic stenosis (AS) and recurrent gastrointestinal bleeding (GIB) from angiodysplasia. Data on the prevalence of HS and results ...after TAVI remain scarce.
Methods
2548 consecutive patients who underwent TAVI for the treatment of AS from 2008 to 2017 were evaluated for a history of GIB and the presence of HS. The diagnosis of HS was defined as a clinical triad of severe AS, a history of recurrent GIB, and an endoscopic diagnosis of angiodysplasia. These patients (Heyde) were followed to investigate clinical outcomes, bleeding complications and the recurrence of GIB and were compared to patients with GIB unrelated to HS (Non-Heyde).
Results
A history of GIB prior to TAVI was detected in 190 patients (7.5%). Among them, 47 patients were diagnosed with HS (1.8%). Heyde patients required blood transfusions more frequently compared to Non-Heyde patients during index hospitalization (50.0% vs. 31.9%,
p
= 0.03). Recurrent GIB was detected in 39.8% of Heyde compared to 21.2% of Non-Heyde patients one year after TAVI (
p
= 0.03). In patients diagnosed with HS and recurrent GIB after TAVI, the rate of residual ≥ mild paravalvular leakage (PVL) was higher compared to those without recurrent bleeding (73.3% vs. 38.1%,
p
= 0.05).
Conclusion
A relevant number of patients undergoing TAVI were diagnosed with HS. Recurrent GIB was detected in a significant number of Heyde patients during follow-up. A possible association with residual PVL requires further investigation to improve treatment options and outcomes in patients with HS.
Graphic abstract
Objectives Transcatheter aortic valve implantation (TAVI) has recently been advocated to decrease perioperative risk in high-risk patients. In this propensity-score analysis we compared outcomes ...after TAVI to those after surgical aortic valve replacement (AVR). Methods From June 2009 through June 2010, 82 consecutive patients underwent TAVI via a transapical (n = 60) or transfemoral (n = 22) approach using the Edwards Sapien prosthesis (Edwards Lifesciences, Irvine, Calif). Mean patient age was 81.9 ± 5.2 years, 64.6% were women. Logistic EuroSCORE was 23.6% ± 1.4% and Society of Thoracic Surgeons score was 8.7% ± 1.3%. A group of 82 patients after surgical AVR was retrieved from our database, yielding a control group that was matched to the cases with respect to baseline demographics and typical risk factors. Results Overall mortality did not differ significantly between TAVI and AVR groups at 30 days (7.3% vs 8.6%), 90 days (13.6% vs 11.1%), or 180 days (17.8% vs 16.9%; P = .889). Conversion to surgery was necessary in 2 (2.4%) TAVI cases. Perioperative stroke occurred in 2 (2.4%) cases per group. Pacemakers were implanted for new-onset heart block in 3.7% and 2.4% in the TAVI and AVR groups, respectively ( P = 1.0). TAVI resulted in shorter operative times ( P < .001), shorter ventilation times ( P < .001), and shorter length of stay in the intensive care unit ( P = .008). Duration of hospital stay, however, was not significantly different ( P = .11). Conclusions In our experience, mortality rates are similar after both types of procedure. Patients receiving TAVI benefit from faster postoperative recovery. Until more clinical data become available, the optimal procedure has to be determined for each patient according to individual risk factors.
Objectives
This study aimed to assess the clinical outcome of the bioprosthetic or native aortic scallop intentional laceration to prevent iatrogenic coronary obstruction (BASILICA) technique in a ...single-center patient cohort considered at high or prohibitive risk of transcatheter aortic valve implantation (TAVI)-induced coronary obstruction.
Methods
Between October 2019 and January 2021, a total of 15 consecutive patients (age 81.0 78.1, 84.4 years; 53.3% female; EuroSCORE II 10.6 6.3, 14.8 %) underwent BASILICA procedure prior to TAVI at our institution. Indications for TAVI were degeneration of stented (
n
= 12, 80.0%) or stentless (
n
= 1, 6.7%) bioprosthetic aortic valves, or calcific stenosis of native aortic valves (
n
= 2, 13.3%), respectively. Individual risk of TAVI-induced coronary obstruction was assessed by pre-procedural computed tomography analysis. Procedural and 30-day outcomes were documented in accordance with Valve Academic Research Consortium (VARC)-2 criteria.
Results
BASILICA was attempted for single left coronary cusp in 12 patients (80.0%), for single right coronary cusp in 2 patients (13.3%), and for both cusps in 1 patient (6.7%), respectively. The procedure was feasible in 13 patients (86.7%) resulting in effective prevention of coronary obstruction, whilst TAVI was performed without prior successful bioprosthetic leaflet laceration in two patients (13.3%). In one of these patients (6.7%), additional chimney stenting immediately after TAVI was performed. No all-cause deaths or strokes were documented after 30 days.
Conclusion
The BASILICA technique appears to be a feasible, safe and effective concept to avoid iatrogenic coronary artery obstruction during TAVI in both native and bioprosthetic valves of patients at high or prohibitive risk.
ClinicalTrials.gov Identifier:
NCT04227002 (Hamburg AoRtic Valve cOhoRt).
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