Challenges and future perspectives of transcatheter tricuspid valve interventions: adopt old strategies or adapt to new opportunities?

Transcatheter annuloplasty with the K-Clip system for tricuspid regurgitation: one-year results from the TriStar study

BACKGROUND

Despite the fact that morbidity and mortality rates significantly increase with tricuspid regurgitation (TR) severity, limited treatment options are available for treating severe TR.

AIMS

The single-arm, multicentre, prospective Confirmatory Clinical Study of Treating Tricuspid Regurgitation With K-Clip TM Transcatheter Annuloplasty System (TriStar) evaluated the 1-year outcomes of the novel transcatheter K-Clip annuloplasty system in treating secondary TR.

METHODS

Between May 2022 and October 2022, patients with ≥severe secondary TR despite optimal medical therapy at 11 centres in China were deemed candidates for transcatheter tricuspid repair by the local Heart Team and a multidisciplinary screening committee. Echocardiographic parameters, clinical and quality-of-life measures, and major adverse events were collected at 1 year.

RESULTS

Ninety-six patients were enrolled (mean age 72.6±7.0 years, 60.4% female, mean TRI-SCORE 5.4±2.1). The technical success rate was 97.9%. At 1 year, echocardiographic follow-up showed an average reduction in the annular septolateral diameter of 11.3% (41.9 mm vs 37.1 mm; p<0.01), compared with baseline, with marked right ventricular remodelling. A total of 82.5% of patients had ≤moderate TR, and 97.7% had a ≥1 grade reduction. Patients experienced significant clinical improvements in New York Heart Association Functional Class I/II (32.6% to 96.5%; p<0.001), the 6-minute walk distance increased by 31.9±71.8 m (p<0.001), and the overall Kansas City Cardiomyopathy Questionnaire score increased by 7.6±17.7 points (p<0.001). Neither cardiovascular death nor reintervention were recorded at the 30-day or 1-year follow-up, while severe bleeding requiring further treatment was noted in 5 patients at 1 year. The Kaplan-Meier estimates of survival and freedom from heart failure rehospitalisation were 97.8% and 95.1%, respectively, at 1 year.

CONCLUSIONS

The 1-year experience using the K-Clip tricuspid annuloplasty system demonstrated high survival and low rehospitalisation rates with durable TR reduction and clinical benefits in functional status and quality-of-life outcomes.

Transcatheter Tricuspid Annuloplasty in Tricuspid Regurgitation Patients With Right Ventricular-Pulmonary Arterial Uncoupling

BACKGROUND

There is limited evidence regarding evidence of transcatheter tricuspid annuloplasty using K-Clip (Huihe Medical Technology) in tricuspid regurgitation (TR) patients with right ventricular-pulmonary arterial (RV-PA) uncoupling.

OBJECTIVES

This study sought to explore the role of transcatheter tricuspid annuloplasty in patients with RV-PA uncoupling.

METHODS

This was a retrospective observational study, including patients who underwent transcatheter annular repair successfully using the K-Clip device with RV-PA uncoupling at 9 centers in China. RV-PA uncoupling was characterized by a tricuspid annular plane systolic excursion/pulmonary artery systolic pressure (PASP) ratio <0.55. Baseline information, imaging results, and their subsequent follow-up data were collected.

RESULTS

All 81 patients (29 men, 72.6 ± 6.9 years of age) underwent successful intervention were enrolled in this study. During 30 days and 6 months follow-up, patients showed significant improvement in tricuspid annular plane systolic excursion/PASP rate (baseline vs 30 days: 0.40 ± 0.07 vs 0.50 ± 0.18; P < 0.001; baseline vs 6 months: 0.40 ± 0.07 vs 0.44 ± 0.11; P = 0.007) and decline in PASP comparing to those at baseline; patients with RV-PA uncoupling showed sustained improvement in TR status with significant improvement in life quality (NYHA functional class, Kansas City Cardiomyopathy Questionnaire scores); 3 noncardiovascular deaths were documented, and the rate of adverse events during follow-up was acceptable.

CONCLUSIONS

Transcatheter tricuspid annuloplasty showed a significant and durable improvement in TR in patients with RV-PA uncoupling. Significant improvement and decline are observed in RV-PA ratio and PASP, respectively. All-cause mortality and adverse event rates were acceptable, with sustained improvements in quality of life.

Outcomes of K-Clip Implantation for Functional Tricuspid Regurgitation Accompanied with Persistent Atrial Fibrillation

Background: Atrial fibrillation (AF) has been identified as a risk factor for functional tricuspid regurgitation (FTR) in the absence of other known etiologies, although limited interventional options are available. K-Clip™, a novel transcatheter tricuspid annuloplasty device, is a clip-based annular plication approach for FTR. To date, no studies have investigated the short-term outcomes of K-Clip™ for patients with severe FTR associated with AF. Therefore, the aim of this study was to explore the feasibility and effectiveness of transcatheter annular repair with K-Clip™ for FTR in patients with persistent AF. Methods: Patients with FTR and persistent AF who underwent transcatheter annular repair with K-Clip™ at nine centers in China during the inclusion period were included (This study derived from Confirmatory Clinical Study of Treating Tricuspid Regurgitation With K-Clip™ Transcatheter Annuloplasty System [TriStar study}). Baseline data, imaging results, and follow-up data were collected. Results: All 52 patients (23 men, 74.02 ± 7.03 years) received successful intervention, and the mean operation time and radian exposure were 2.64 ± 1.09 h and 133.33 ± 743.06 mGy, respectively. No death cases and a low major adverse event occurrence rate were reported in 30 days. A significant decrease in FTR was documented, and TR remained severe in only two patients (3.8%). The regurgitation volume decreased significantly, accompanied by a notable reduction in the effective regurgitation orifice area and tricuspid annulus diameter, which subsequently led to the reversal of right heart remodeling. Furthermore, a decrease in pulmonary artery systolic pressure and an increase in cardiac output were documented. Conclusions: Transcatheter annular repair with K-Clip™ showed favorable short-term prognosis and significant improvement in FTR in patients with severe FTR associated with persistent AF. K-Clip™ could be a novel option for that group of patients.

2024 update in heart failure

In the last years, major progress has occurred in heart failure (HF) management. The 2023 ESC focused update of the 2021 HF guidelines introduced new key recommendations based on the results of the last years of science. First, two drugs, sodium-glucose co-transporter-2 (SGLT2) inhibitors and finerenone, a novel nonsteroidal, selective mineralocorticoid receptor antagonist (MRA), are recommended for the prevention of HF in patients with diabetic chronic kidney disease (CKD). Second, SGLT2 inhibitors are now recommended for the treatment of HF across the entire left ventricular ejection fraction spectrum. The benefits of quadruple therapy in patients with HF with reduced ejection fraction (HFrEF) are well established. Its rapid and early up-titration along with a close follow-up with frequent clinical and laboratory re-assessment after an episode of acute HF (the so-called 'high-intensity care' strategy) was associated with better outcomes in the STRONG-HF trial. Patients experiencing an episode of worsening HF might require a fifth drug, vericiguat. In the STEP-HFpEF-DM and STEP-HFpEF trials, semaglutide 2.4 mg once weekly administered for 1 year decreased body weight and significantly improved quality of life and the 6 min walk distance in obese patients with HF with preserved ejection fraction (HFpEF) with or without a history of diabetes. Further data on safety and efficacy, including also hard endpoints, are needed to support the addition of acetazolamide or hydrochlorothiazide to a standard diuretic regimen in patients hospitalized due to acute HF. In the meantime, PUSH-AHF supported the use of natriuresis-guided diuretic therapy. Further options and most recent evidence for the treatment of HF, including specific drugs for cardiomyopathies (i.e., mavacamten in hypertrophic cardiomyopathy and tafamidis in transthyretin cardiac amyloidosis), device therapies, cardiac contractility modulation and percutaneous treatment of valvulopathies, with the recent finding from the TRILUMINATE Pivotal trial, are also reviewed in this article.

Mitral regurgitation evolution after transcatheter tricuspid valve interventions-a sub-analysis of the TriValve registry

AIMS

Transcatheter tricuspid valve interventions (TTVI) are increasingly used to treat patients with significant tricuspid regurgitation (TR). The evolution of concurrent mitral regurgitation (MR) severity after TTVI is currently unknown and may be pivotal for clinical decision-making. The aim of this study was to assess the evolution of MR after TTVI and to identify predictors of MR worsening and improvement.

METHODS AND RESULTS

This analysis is a substudy of the TriValve Registry, an international registry designed to collect data on TTVI. This substudy included all patients with echocardiographic data on MR evolution and excluded those with a concomitant tricuspid and mitral transcatheter valve intervention or with a history of mitral valve intervention. The co-primary outcomes were MR improvement and worsening at two timepoints: pre-discharge and 2-month follow-up. This analysis included 359 patients with severe TR, mostly (80%) treated with tricuspid transcatheter edge-to-edge repair (T-TEER). MR improvement was found in 106 (29.5%) and 99 (34%) patients, while MR worsening was observed in 34 (9.5%) and 33 (11%) patients at pre-discharge and 2-month follow-up, respectively. Annuloplasty and heterotopic replacement were associated with MR worsening. Independent predictors of MR improvement were: atrial fibrillation, T-TEER, acute procedural success, TR reduction, left ventricular end-diastolic diameter> 60 mm, and beta-blocker therapy. Patients with moderate-to-severe/severe MR following TTVI showed significantly higher death rates.

CONCLUSION

MR degree variation is common after TTVI, with most cases showing improvement. Clinical and procedural characteristics may predict the MR evolution, in particular procedural success and T-TEER play key roles in MR outcomes. TTVI may be beneficial, even in the presence of functional MR.

Advances in the Assessment of Patients With Tricuspid Regurgitation: A State-of-the-Art Review on the Echocardiographic Evaluation Before and After Tricuspid Valve Interventions

Tricuspid regurgitation (TR) can have a significant impact on the health and mortality of a patient. Unfortunately, many patients with advanced right-sided heart failure are not referred for isolated tricuspid valve (TV) surgery in a timely manner. This delayed referral has resulted in a high in-hospital mortality rate and significant undertreatment. Fortunately, transcatheter TV intervention (TTVI) has emerged as a safe and effective alternative to surgery, successfully reducing TR severity and improving patients' quality of life. Current guidelines emphasize the importance of assessing TR severity and its impact on the right heart chambers for selecting the appropriate intervention. However, the echocardiographic assessment of both right chambers and TV anatomy, along with TR severity, poses specific challenges, leading to the underestimation of TR severity. Recently, three-dimensional echocardiography has become crucial to enhance the characterization of TR severity. Moreover, it is essential to evaluate residual TR after TTVI to gauge the intervention's success and predict the patient's prognosis. This review provides a thorough evaluation of the echocardiographic parameters used to assess TR severity before and after TTVI. It presents a critical analysis of the accuracy and reliability of these parameters, highlighting their strengths and limitations to establish standardized diagnostic criteria and treatment protocols for TR, which will inform clinical decision-making and improve patient outcomes.

Key Imaging Factors for Transcatheter Management of Tricuspid Regurgitation: Device and Patient Selection

The growing awareness of tricuspid regurgitation (TR) and the fast-expanding array of devices aiming to percutaneously repair or replace the tricuspid valve have underscored the central role of multi-modality imaging in comprehensively assessing the anatomical and functional characteristics of TR. Accurate phenotyping of TR, the right heart, and pulmonary vasculature via echocardiography, computed tomography, and, occasionally, cardiovascular magnetic resonance and right heart catheterization is deemed crucial in choosing the most suitable treatment strategy for each patient and achieving procedural success. In the first part of the present review, key imaging factors for patient selection will be discussed. In the ensuing sections, an overview of the most commonly used, commercially available systems for transcatheter repair/replacement will be presented, along with their respective selection criteria and information on intraprocedural imaging guidance; these are edge-to-edge repair, orthotopic and heterotopic replacement, and valve-in-valve procedures.

Transcatheter tricuspid valve intervention versus medical therapy for symptomatic tricuspid regurgitation: a meta-analysis of reconstructed time-to-event data

BACKGROUND

Transcatheter tricuspid valve intervention (TTVI) has demonstrated safety and efficacy in treating high-risk patients with tricuspid regurgitation (TR). The authors aimed to perform a meta-analysis based on reconstructed time-to-event data to compare the clinical benefit of TTVI with medical therapy (MED).

METHODS

A systematic literature search was conducted in major databases, including PubMed, Embase, and the Cochrane Library, until 20 October 2023. All studies comparing the outcomes between TTVI and MED were included. The primary outcome was all-cause mortality. The secondary outcomes included heart failure (HF) hospitalization and the composite outcome of all-cause mortality and HF hospitalization.

RESULTS

Five studies covering 3826 patients (1146 received TTVI and 2680 received MED) were identified. At 1-year follow-up, TTVI significantly reduced the risk of all-cause mortality compared with MED [hazard ratio (HR) 0.54, 95% CI: 0.39-0.74, P=0.0001]. There was a trend in favor of TTVI in HF hospitalization, although without significant difference (HR 0.70, 95% CI: 0.42-1.18, P=0.18). TTVI was also associated with a decreased risk of composite outcome (HR 0.57, 95% CI: 0.38-0.86, P=0.007). Reconstructed Kaplan-Meier curves illustrated a 1-year overall survival rate of 83.1% in the TTVI group and 68.8% in the MED group. The subgroup analysis of device types yielded consistent results.

CONCLUSIONS

Compared with MED, TTVI was associated with greater 1-year benefits for patients with symptomatic moderate or greater TR from the aspects of all-cause mortality and HF hospitalization.

TRIVALVE Score: A Risk Score for Mortality/Hospitalization Prediction in Patients Undergoing Transcatheter Tricuspid Valve Intervention

BACKGROUND

Transcatheter tricuspid valve intervention (TTVI) has been increasingly adopted in recent years for the treatment of patients with tricuspid regurgitation (TR). However, no dedicated risk stratification has been established for patients undergoing TTVI.

OBJECTIVES

The aim of the present study was to propose a dedicated risk score for patients affected by severe TR undergoing TTVI.

METHODS

The score was derived from the TRIVALVE (International Multisite Transcatheter Tricuspid Valve Therapies Registry; NCT03416166) registry, according to data availability. A stepwise model approach was used on predictor variables to develop a scoring system for predicting 12-month mortality or rehospitalization using multivariable logistic regression. Internal discrimination, calibration, and validation were assessed using receiver-operating characteristic curve analysis and bootstrapping with 1,000 resamples.

RESULTS

A total of 483 patients were included in the study, with an overall 12-month mortality or rehospitalization rate of 19% (n = 94). The final risk score, ranging from 0 to 4.5, included the following 5 parameters (adjusted for age and gender): 1) atrial fibrillation at baseline; 2) glomerular filtration rate <30 mL/min; 3) elevated gamma-glutamyl transferase/bilirubin levels; 4) signs of right heart failure; and 5) left ventricular ejection fraction <50%. The bias-corrected area under the receiver-operating characteristic curve was 68% (95% CI: 62%-75%). A cutoff value of 2.5 demonstrated sensitivity of 65.4% and specificity of 60.5% for the outcome.

CONCLUSIONS

The present study proposes a dedicated risk score for patients undergoing TTVI, providing an additional and simple tool for heart teams to select the best therapy for patients affected by severe TR.

Tricuspid Regurgitation Complicating Heart Failure: A Novel Clinical Entity

With the escalating incidence of heart failure, accurate diagnosis is paramount for tailored therapeutic interventions. The tricuspid valve, particularly tricuspid regurgitation, once relegated as the "forgotten valve", has gained prominence due to increasing evidence implicating severe tricuspid valve disease in the prognosis of diverse cardiovascular conditions. This review delineates recent significant advancements in imaging modalities, transcatheter interventions, and epidemiological and pathophysiological insights regarding tricuspid regurgitation complicating heart failure. A comprehensive understanding of these innovative concepts and technologies can significantly improve patient outcomes.

Predictors of residual tricuspid regurgitation after interventional therapy: an automated deep-learning CT analysis

Computed tomography (CT) is used as a valuable tool for device selection for interventional therapy in tricuspid regurgitation (TR). We aimed to evaluate predictors of TR reduction using CT and automated deep learning algorithms. Patients with severe to torrential TR and CTs prior to either percutaneous annuloplasty (PA) or tricuspid transcatheter edge-to-edge repair (T-TEER) were enrolled. CTs were analyzed using automated deep learning algorithms to assess tricuspid valve anatomy, right heart morphology, and function. Outcome parameters comprised post-interventional TR ≤ 1 and all-cause mortality. 84 patients with T-TEER (n = 32) or PA treatment (n = 52) were enrolled. Patients with a post-interventional TR ≤ 1 presented lower tenting heights and smaller tenting angles compared to patients with a TR > 1. Tenting height showed the best accuracy for post-interventional TR > 1 with an AUC of 0.756 (95% CI 0.560-0.951) in the T-TEER and 0.658 (95% CI 0.501-0.815) in the PA group, consistent with a suggested threshold of 6.8 mm and 9.2 mm, respectively. Patients with a post-interventional TR ≤ 1 exhibited a mortality of 4% and those with a TR > 1 of 12% during a follow-up of 331 ± 300 and 370 ± 265 days, respectively (p = 0.124). To conclude, tenting is associated with procedural outcomes and should be considered during screening for interventional TR therapy.

Effects of tricuspid transcatheter edge-to-edge repair on tricuspid annulus diameter - Data from the TriValve registry

AIMS

T-TEER is an effective therapy for the treatment of tricuspid regurgitation (TR). However, the effects of leaflets clipping on tricuspid valve annulus (TA) have not been investigated in detail. The aim of this study is to investigate the effects of tricuspid transcatheter edge-to-edge repair (T-TEER) on TA diameter.

METHODS AND RESULTS

The TriValve registry (Transcatheter Tricuspid Valve Therapies, NCT03416166) collected 556 patients from 22 European and North American centres undergoing transcatheter tricuspid valve interventions from 2016 to 2022. Patients undergoing T-TEER with available pre- and post-procedural data on TA diameter measured in the apical 4-chamber view on transthoracic echocardiography were selected for this study. Primary end-point was the reduction of TA diameter after T-TEER. A total of 186 patients were included in the study. In 115 patients (62%) TA diameter was reduced by at least 1 mm as compared to baseline. A significant reduction of TA dimension was observed following T-TEER (mean 2.3 mm [from pre-procedural diameter 46.7 mm to post-procedural diameter 44.4 mm], p < 0.001). In particular, the greatest reduction was observed in those with T-TEER in antero-septal commissure (mean 2.7 mm [from 47.1 mm to 44.4 mm], p < 0.001) as compared to those combining both antero-septal and postero-septal commissures (mean 1.4, from 46.0 mm to 44.6 mm, P = 0.06). A significant reduction of TA dimension was recorded in patients with 1 or 2 clips implanted but not in those patients with ≥3 clips implanted.

CONCLUSIONS

In almost two third of patients T-TEER reduces TA diameter in addition to leaflet approximation.

CONDENSED ABSTRACT

The effects of tricuspid transcatheter edge-to-edge repair (T-TEER) on tricuspid valve annulus (TA) have not been studied in details. This study investigates TA diameter as measured in apical 4-chamber view on transthoracic echocardiography before and after T-TEER. A total of 186 patients from the TriValve registry were included in the study. The study results show that 62% of patients have a TA reduction after T-TEER, especially in those receiving 1 or 2 clips in the antero-septal commissure. These suggest that T-TEER reduces tricuspid regurgitation not only by approximation of leaflets, but also by TA diameter reduction.

Right Atrial Remodeling and Outcome in Patients with Secondary Tricuspid Regurgitation

BACKGROUND

In patients with secondary tricuspid regurgitation (STR), right atrial remodeling (RAR) is a proven marker of disease progression. However, the prognostic value of RAR, assessed by indexed right atrial volume (RAVi) and reservoir strain (RAS), remains to be clarified. Accordingly, the aim of our study is to investigate the association with outcome of RAR in patients with STR.

METHODS

We enrolled 397 patients (44% men, 72.7 ± 13 years old) with mild to severe STR. Complete two-dimensional and speckle-tracking echocardiography analysis of right atrial and right ventricular (RV) size and function were obtained in all patients. The primary end point was the composite of death from any cause and heart failure hospitalization.

RESULTS

After a median follow-up of 15 months (interquartile range, 6-23), the end point was reached by 158 patients (39%). Patients with RAS <13% and RAVi >48 mL/m2 had significantly lower survival rates compared to patients with RAS ≥13% and RAVi ≤48 mL/m2 (log-rank P < .001). On multivariable analysis, RAS <13% (hazard ratio, 2.11; 95% CI, 1.43-3.11; P < .001) and RAVi > 48 mL/m2 (hazard ratio, 1.49; 95% CI, 1.01-2.18; P = .04) remained associated with the combined end point, even after adjusting for RV free-wall longitudinal strain, significant chronic kidney disease, and New York Heart Association class. Secondary tricuspid regurgitation excess mortality increased exponentially with values of 18.2% and 51.3 mL/m2 for RAS and RAVi, respectively. In nested models, the addition of RAS and RAVi provided incremental prognostic value over clinical, conventional echocardiographic parameters of RV size and function and RV free-wall longitudinal strain.

CONCLUSIONS

In patients with STR, RAR was independently associated with mortality and heart failure hospitalization. Assessment of RAR could improve risk stratification of patients with STR, potentially identifying those who may benefit from optimization of medical therapy and a closer follow-up.

Translating Ideas into Commercial Biomaterial Devices: A Path to Improving Healthcare

The medical device industry is undergoing substantial transformations, looking to face the increasing pressures on healthcare systems and fundamental shifts in healthcare delivery. There is an ever-growing emphasis on identifying underserved clinical requirements and enhancing industry-academia partnerships to accelerate innovative solutions. In this context, an analysis of the requirements for translation, highlighting support and funding for innovation to transform an idea for a biomaterial device into a commercially available product, is discussed.

Prediction of Mortality and Heart Failure Hospitalization After Transcatheter Tricuspid Valve Interventions: Validation of TRISCORE

BACKGROUND

Data on the prognostic role of the TRI-SCORE in patients undergoing transcatheter tricuspid valve intervention (TTVI) are limited.

OBJECTIVES

The aim of this study was to evaluate the performance of the TRI-SCORE in predicting outcomes of patients undergoing TTVI.

METHODS

TriValve (Transcatheter Tricuspid Valve Therapies) is a large multicenter multinational registry including patients undergoing TTVI. The TRI-SCORE is a risk model recently proposed to predict in-hospital mortality after tricuspid valve surgery. The TriValve population was stratified based on the TRI-SCORE tertiles. The outcomes of interest were all-cause death and all-cause death or heart failure hospitalization. Procedural complications and changes in NYHA functional class were also reported.

RESULTS

Among the 634 patients included, 223 patients (35.2%) had a TRI-SCORE between 0 and 5, 221 (34.8%) had 6 or 7, and 190 (30%) had ≥8 points. Postprocedural blood transfusion, acute kidney injury, new atrial fibrillation, and in-hospital mortality were more frequent in the highest TRI-SCORE tertile. Postprocedure length of stay increased with a TRI-SCORE increase. A TRI-SCORE ≥8 was associated with an increased risk of 30-day all-cause mortality and all-cause mortality and the composite endpoint assessed at a median follow-up of 186 days (OR: 3.00; 95% CI: 1.38-6.55; HR: 2.17; 95% CI: 1.78-4.13; HR: 2.08, 95% CI: 1.57-2.74, respectively) even after adjustment for procedural success and EuroSCORE II or Society of Thoracic Surgeons Predicted Risk of Mortality. The NYHA functional class improved across all TRI-SCORE values.

CONCLUSIONS

In the TriValve registry, the TRI-SCORE has a suboptimal performance in predicting clinical outcomes. However, a TRISCORE ≥8 is associated with an increased risk of clinical events and a lack of prognostic benefit after successful TTVI.

Temporal trends of frame expansion and paravalvular leak reduction after transcatheter aortic valve replacement with self-expandable prostheses

BACKGROUND

Paravalvular leakage (PVL) is a common finding after transcatheter aortic valve replacement (TAVR) and affects late clinical outcome. It is more frequent with self-expandable (SE) transcatheter-heart-valve (THV). Few is known about SE-THV expansion after implantation. The purpose is to assess SE-THV frame expansion and its possible influence on PVL.

METHODS

We designed a prospective pilot study to assess the time-course of SE-THV frame dimensions and PVL after TAVR. Consecutive patients undergoing TAVR with SE-THV were enrolled. Prosthesis fluoroscopy and echocardiography were prospectively performed immediately after TAVR (T0) and before discharge (T1) to grade PVL. Prosthesis diameters were assessed in 2 fluoroscopic orthogonal views. PVL reduction ≥1+ from T0 to T1 at echocardiography was the primary study endpoint.

RESULTS

Twenty-five patients were enrolled. Mean interval between T0 and T1 evaluations was 5 days. Grade 1 or 2 was present in 76% of patients at T0 and in 68% at T1 (P=0.034). A total of 7 patients (28%) improved PVL ≥1 grade from T0 to T1. Differences between T0 and T1 fluoroscopic diameters were not statistically significant. When comparing the diameter changes according to PVL evolution, patients with PVL improvement (as compared with those without) had significantly larger minimum diameter increase at both annulus/inflow (P=0.016) and outflow/distal edge (P=0.027).

CONCLUSIONS

PVL may improve in the early days after SE-THV and those patients with PVL improvement may have THV frame expansion. Further studies are needed to confirm such preliminary observations and to establish the clinical relevance of this phenomenon.

Contemporary evaluation and treatment of tricuspid regurgitation

Valvular heart disease is a global health burden with substantial mortality. The left-sided valvular diseases have been extensively described using the robust treatment strategies available. By contrast, the right-sided diseases, particularly the tricuspid valve (TV) and associated regurgitation, still have much to be delineated. Worsening tricuspid regurgitation (TR) is associated with increased mortality; the non-invasive management is suboptimal; and surgical approaches carry significant risk. With advances in multimodality imaging, 3D echocardiography, improved understanding of TV anatomy, and pathophysiological mechanisms of primary and secondary regurgitation, as well as favorable data with transcatheter therapies, the field of TV management is rapidly evolving. This review aims to highlight pathophysiological mechanisms of TR, describe echocardiographic approaches to diagnosis and TV interrogation, and outline the latest transcatheter developments.

Tricuspid transcatheter edge-to-edge repair in a 72-year-old patient with a left ventricular assist device and prior mitral edge-to-edge repair: a case report

Background

We report a case of a 72-year-old patient developing a significant tricuspid regurgitation (TR) 6 years after a left ventricular assist device (LVAD) implantation. The aim of this case is to demonstrate the feasibility of transcatheter edge-to-edge repair (TEER) of the tricuspid valve and the excellent clinical benefit in long-term follow-up in an LVAD patient.

Case summary

Our patient presented with recurrent acute heart failure syndrome. After a fulminant myocarditis in 2005, his previous treatment consisted of cardiac resynchronization therapy, TEER of the mitral valve, and LVAD (HeartMate III) implantation. At that point in time, his TR was only mild to moderate. Due to recurrent hospitalization despite optimized heart failure medication, we decided to treat the patient with a tricuspid TEER. His immediate post-interventional result and 1-year follow-up showed an excellent outcome with only minimal TR on transoesophageal echocardiogram.

Discussion

In general, TR improves after LVAD implantation. However, there are two possible pathophysiological mechanisms, which result in an increasing TR: firstly, supporting LV dysfunction may lead to a leftward shift of the interventricular septum with restriction of the tricuspid leaflets. Secondly, the increase of venous preload with LVAD support may result in an annular dilatation with secondary TR, particularly in patients with pre-existing right ventricular dysfunction. According to the data currently available, the unpredictable course of developing TR necessitates regular clinical examination and echocardiographic investigation. Treatment with TEER appears to be feasible and safe, with excellent 1-year results in patients with previously implanted LVADs.

Contemporary Approach to Tricuspid Regurgitation: Knowns, Unknowns, and Future Challenges

Severe tricuspid regurgitation (TR) worsens heart failure and is associated with impaired survival. In daily clinical practice, patients are referred late, and tricuspid valve interventions (surgical or transcatheter) are underutilised, which may lead to irreversible right ventricular damage and increases risk. This article addresses the appropriate timing and modality for an intervention (surgical or transcatheter), and its potential benefits on clinical outcomes. Ongoing randomised controlled trials will provide further insights into the efficacy of transcatheter valve interventions compared with medical treatment.

Epidemiology, pathophysiology, diagnosis and management of chronic right-sided heart failure and tricuspid regurgitation. A clinical consensus statement of the Heart Failure Association (HFA) and the European Association of Percutaneous Cardiovascular Interventions (EAPCI) of the ESC

Right-sided heart failure and tricuspid regurgitation are common and strongly associated with poor quality of life and an increased risk of heart failure hospitalizations and death. While medical therapy for right-sided heart failure is limited, treatment options for tricuspid regurgitation include surgery and, based on recent developments, several transcatheter interventions. However, the patients who might benefit from tricuspid valve interventions are yet unknown, as is the ideal time for these treatments given the paucity of clinical evidence. In this context, it is crucial to elucidate aetiology and pathophysiological mechanisms leading to right-sided heart failure and tricuspid regurgitation in order to recognize when tricuspid regurgitation is a mere bystander and when it can cause or contribute to heart failure progression. Notably, early identification of right heart failure and tricuspid regurgitation may be crucial and optimal management requires knowledge about the different mechanisms and causes, clinical course and presentation, as well as possible treatment options. The aim of this clinical consensus statement is to summarize current knowledge about epidemiology, pathophysiology and treatment of tricuspid regurgitation in right-sided heart failure providing practical suggestions for patient identification and management.

Characteristics and outcomes of patients with atrial versus ventricular secondary tricuspid regurgitation undergoing tricuspid transcatheter edge-to-edge repair - Results from the TriValve registry

AIM

Functional or secondary tricuspid regurgitation (STR) is the most common phenotype of tricuspid regurgitation (TR) with atrial STR (ASTR) and ventricular STR (VSTR) being recently identified as two distinct entities. Data on tricuspid transcatheter edge-to-edge repair (T-TEER) in patients with STR according to phenotype (i.e. ASTR vs. VSTR) are lacking. The aim of this study was to assess characteristics and outcomes of patients with ASTR versus VSTR undergoing T-TEER.

METHODS AND RESULTS

Patients with STR undergoing T-TEER were selected from the Transcatheter Tricuspid Valve Therapies (TriValve) registry. ASTR was defined by (i) left ventricular ejection fraction ≥50%, (ii) atrial fibrillation, and (iii) systolic pulmonary artery pressure <50 mmHg. Patients not matching these criteria were classified as VSTR. Patients with primary TR and cardiac implantable electronic device were excluded. Key endpoints included procedural success and survival at follow-up. A total of 298 patients were enrolled in the study: 65 (22%) with ASTR and 233 (78%) with VSTR. Procedural success was similar in the two groups (80% vs. 83% for ASTR vs. VSTR, p = 0.56) and TEER was effective in reducing TR in both groups (from 97% of patients with baseline TR ≥3+ to 23% in ASTR and to 15% in VSTR, all p = 0.001). At 12-month follow-up, survival was significantly higher in the ASTR versus VSTR cohort (91% vs. 72%, log-rank p = 0.02), with VSTR being an independent predictor of mortality at multivariable analysis (hazard ratio 4.75).

CONCLUSIONS

In a real-world, multicentre registry, T-TEER was effective in reducing TR grade in both ASTR and VSTR. At 12-month follow-up, ASTR showed better survival than VSTR.

Transcatheter mitral valve implantation for native valve disease

Mitral regurgitation is the second most frequent heart valve disease in Europe and the most frequent in the US. Although surgery is the therapy of choice when intervention is indicated, transcatheter mitral valve repair or replacement are alternatives for patients who are not eligible for surgery. However, the development of transcatheter mitral valves is slower than expected. Although several transcatheter heart valves have been developed, only one has been commercialised. Indeed, most of these devices are being evaluated in clinical studies, with promising initial results. In this review, we propose an overview on transcatheter mitral valve replacement for the treatment of native mitral valve disease, from indication to results, including patients with severe annular calcification, and we provide you with a glimpse into the future of these therapies.

Trans-oesophageal echocardiography-guided implantation of a cardiac resynchronization therapy pacemaker and successful ablation of the atrioventricular node after TriClip: case report

Background

Edge-to-edge intervention is the most common trans-catheter procedure performed for isolated severe tricuspid regurgitation in high-surgical-risk patients. However, it creates an obstacle for future right ventricular (RV) procedures such as implantation of cardiac implantable electronic devices (CIEDs). Reports of the management of CIED implantation after tricuspid edge-to-edge therapy are scarce.

Case summary

A 76-year-old woman suffered from severe tricuspid regurgitation with New York Heart Association three symptoms despite optimal medical therapy. After a thorough evaluation, the heart team recommended the TriClip procedure as the treatment of choice. However, 12 months after a successful TriClip procedure, rapid atrial fibrillation needed to be addressed with CIED implantation and atrioventricular (AV) node ablation. Pre-procedural planning included the intended posterior location of the CIED to avoid interference with the implanted clip and future AV node ablation. With an additional left ventricular lead positioned anteriorly to the RV lead, the posterior position of the RV lead was secured. Under peri-procedural trans-oesophageal echocardiography (TEE), the planned procedures were performed successfully.

Discussion

A blind manoeuvring of the RV lead may damage the edge-to-edge tricuspid device. In addition, friction due to an overly close contract between the RV lead and the edge-to-edge device may damage the RV lead. A successful and safe CIED implantation and atrioventricular node ablation can be performed after tricuspid edge-to-edge therapy with careful planning and its precise execution under TEE surveillance.

First-in-human study of the K-Clip™ transcatheter annular repair system for severe functional tricuspid regurgitation

BACKGROUND

Severe TR is associated with impaired prognosis while limited interventional options available. The purpose of this observational first-in-human experience with the K-Clip™ transcatheter tricuspid annular reconstruction system is to investigate its feasibility, safety as well as short-term clinical impact on patients with severe functional tricuspid regurgitation (TR).

METHODS

In this compassionate-use, prospective, multi-center, single-arm study, 15 patients with severe symptomatic functional TR were treated with the K-Clip™ system and followed up at 30 days after discharge. Feasibility endpoints consisted of safety (major clinical cardiovascular events (MACEs), echocardiographic, clinical and functional endpoints.

RESULTS

All the 15 patients (9 males, 72.67 ± 9.42 years of age) successfully received implants and no MACEs were reported throughout the study at 30 days. Between baseline and 30 days, echocardiography showed remarkable reduction of tricuspid annular circumference and area by 14.30% and 25.96%. Improvement of ≥ + 2 grade and ≥ +3 grade TR was presented in 9/15(60.00%) and 4/15(26.67%) respectively while 10/15(66.67%) of patients had ≤ moderate TR. Clinical evaluation indicated that 86.67% of patients were finally in NYHA functional class I or II (p<0.001) and overall Kansas City Cardiomyopathy Questionnaire score improved from 62.28 ± 18.97 to 77.90 ± 11.70 (p = 0.016).

CONCLUSION

Our first-in-human results of the transcatheter tricuspid annular reconstruction using the K-Clip™ system demonstrated initial favorable procedural success, acceptable safety and remarkable TR reduction in consistent with significant clinical improvement. Larger-scaled prospective trials with longer follow-up duration are warranted to further determine whether these promising findings could be promoted to a broader population in the long term.

A multifunctional soft robot for cardiac interventions

In minimally invasive endovascular procedures, surgeons rely on catheters with low dexterity and high aspect ratios to reach an anatomical target. However, the environment inside the beating heart presents a combination of challenges unique to few anatomic locations, making it difficult for interventional tools to maneuver dexterously and apply substantial forces on an intracardiac target. We demonstrate a millimeter-scale soft robotic platform that can deploy and self-stabilize at the entrance to the heart, and guide existing interventional tools toward a target site. In two exemplar intracardiac procedures within the right atrium, the robotic platform provides enough dexterity to reach multiple anatomical targets, enough stability to maintain constant contact on motile targets, and enough mechanical leverage to generate newton-level forces. Because the device addresses ongoing challenges in minimally invasive intracardiac intervention, it may enable the further development of catheter-based interventions.

Right coronary artery kinking after tricuspid valve annuloplasty: a case report

Background

Right coronary artery (RCA) injury is a rare complication of valvular surgery. However, complications should be considered, due to the significant clinical consequences. Identifying the coronary injury type and understanding the underlying pathophysiological mechanisms is essential to managing these complications.

Case summary

The case of a 59-year-old man who underwent conservative mitral valve surgery with tricuspid valve annuloplasty is presented. The early post-operative period was complicated by acute coronary syndrome with inferior persistent ST-segment elevation. A coronary angiogram confirmed critical RCA hazy lesions, raising the suspicion of coronary kinking. To confirm the underlying mechanism for these lesions and determine the best treatment strategy, endocoronary imaging was performed, revealing coronary kinking of the RCA. Based on the persistent acute ischaemia, a long-lasting drug-eluting stent (DES) was implanted in the lower and upper knees of the RCA. After angioplasty, electrocardiography showed regression of the ST-segment elevation. Ten days later, coronary angiography and optical coherence tomography showed good results. The patient recovered from his myocardial infarction.

Discussion

Only a few reports describe the use of endocoronary imaging for diagnosing coronary artery injury after tricuspid annuloplasty. The variety of lesion types that could underlie a single post-operative myocardial infarction makes endocoronary imaging a relevant technique to guide management strategy and optimize DES implantation.

Comparison of procedural characteristics of percutaneous annuloplasty and edge-to-edge repair for the treatment of severe tricuspid regurgitation

Background

In recent years, new interventional therapies for tricuspid regurgitation (TR) demonstrated their effectiveness in reducing TR severity and improving symptoms. Currently, tricuspid transcatheter edge-to-edge repair (T-TEER) and percutaneous annuloplasty are the most widely used techniques in Europe. In this retrospective study, we compared procedural characteristics and learning curves of both TR devices in a real-world cohort.

Material and methods

Eligible patients with severe to torrential TR underwent either percutaneous annuloplasty or T-TEER as recommended by the local heart team. Patients with combined mitral and tricuspid interventions were excluded from the analysis. The study focused on procedural characteristics, TR reduction and learning curves.

Results

A total of 122 patients underwent either percutaneous annuloplasty (n = 64) or T-TEER (n = 58) with a technical and device success rate of 98% and 97%, respectively. Reasons for technical failure included right coronary artery (RCA) dissection prior to percutaneous annuloplasty, and two single leaflet device attachments (SLDA) during T-TEER implantation. The mean improvement of TR severity was 2.4 ± 0.8 degrees after T-TEER and 2.5 ± 0.8 after percutaneous annuloplasty. T-TEER procedures were shorter in terms of both procedure time and radiation exposure, while percutaneous annuloplasty, although taking longer, showed a significant reduction in procedure time over the course of the analysed period.

Conclusion

In summary, both interventional therapies reduce TR severity by approximately two degrees when used in the appropriate anatomy. The learning curve for annuloplasty group showed a significant decrease of procedure times.

ACC/AHA and ESC/EACTS Guidelines for the Management of Valvular Heart Diseases: JACC Guideline Comparison

Valvular heart disease (VHD) is common and poses important challenges from the standpoints of diagnosis and therapeutic management. Clinical practice guidelines have been developed to help health care professionals to overcome these challenges and provide optimal management to patients with VHD. The American College of Cardiology, in collaboration with the American Heart Association, and the European Society of Cardiology, in collaboration with the European Association for Cardio-Thoracic Surgery, recently updated their guidelines on the management of VHD. Although these 2 sets of guidelines are generally concordant, there are some substantial differences between these guidelines, which may have significant implications for clinical practice. This review prepared on behalf of the EuroValve Consortium describes the consistencies and discrepancies between the guidelines and highlights the gaps in these guidelines and the future research perspectives to fill these gaps.

Heterotopic caval valve-in-valve procedure for prosthetic migration: two case reports

Background

Heterotopic bicaval stenting or caval valve implantation (CAVI) either with non-dedicated balloon-expandable Sapien™ valves (Edwards Lifesciences) or with dedicated TricValve™ (Products + Features) has emerged as a safe and effective percutaneous treatment for high-risk patients with severe tricuspid regurgitation (TR). One technical difficulty of CAVI is the lack of native calcified structures to anchor the device, which may lead to paravalvular leak or migration.

Cases summary

We describe two patients with severe TR and high surgical risk who underwent CAVI procedures, both of them complicated with device migration to the right atrium (one inferior vena cava device and one superior vena cava device). Both cases were treated with a caval valve-in-valve procedure, with good technical and clinical results.

Discussion

With the recent development of several percutaneous interventions for high-risk patients with severe TR, the rate of some possible complications is not well established, and neither are the better managing strategies. Device embolization is a rare complication of transcatheter heart interventions but with potential catastrophic consequences. Less invasive strategies such as the valve-in-valve procedure may be preferable in order to avoid the exposure of these patients to complex heart surgeries with extracorporeal circulation.

Acute heart failure and valvular heart disease: A scientific statement of the Heart Failure Association, the Association for Acute CardioVascular Care and the European Association of Percutaneous Cardiovascular Interventions of the European Society of Cardiology

Acute heart failure (AHF) represents a broad spectrum of disease states, resulting from the interaction between an acute precipitant and a patient's underlying cardiac substrate and comorbidities. Valvular heart disease (VHD) is frequently associated with AHF. AHF may result from several precipitants that add an acute haemodynamic stress superimposed on a chronic valvular lesion or may occur as a consequence of a new significant valvular lesion. Regardless of the mechanism, clinical presentation may vary from acute decompensated heart failure to cardiogenic shock. Assessing the severity of VHD as well as the correlation between VHD severity and symptoms may be difficult in patients with AHF because of the rapid variation in loading conditions, concomitant destabilization of the associated comorbidities and the presence of combined valvular lesions. Evidence-based interventions targeting VHD in settings of AHF have yet to be identified, as patients with severe VHD are often excluded from randomized trials in AHF, so results from these trials do not generalize to those with VHD. Furthermore, there are not rigorously conducted randomized controlled trials in the setting of VHD and AHF, most of the data coming from observational studies. Thus, distinct to chronic settings, current guidelines are very elusive when patients with severe VHD present with AHF, and a clear-cut strategy could not be yet defined. Given the paucity of evidence in this subset of AHF patients, the aim of this scientific statement is to describe the epidemiology, pathophysiology, and overall treatment approach for patients with VHD who present with AHF.

Periprocedural, short-term, and long-term outcomes following transcatheter tricuspid valve repair: a systemic review and meta-analysis

BACKGROUND

There has been an increasing use of transcatheter tricuspid valve repair (TTVR) recently. However, the periprocedural, short-term, and long-term outcomes of TTVR remain unclear.

OBJECTIVES

To determine the clinical outcomes in patients with significant tricuspid regurgitation undergoing TTVR.

DESIGN

Systematic review and meta-analysis.

DATA SOURCE AND METHODS

The systematic review and meta-analysis is reported according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. PubMed and EMBASE were searched for clinical trials and observational studies until March 2022. Studies reporting the incidence of clinical outcomes after TTVR were included. The clinical outcomes included periprocedural, short-term (in-hospital or within 30 days), and long-term (>6-month follow-up) outcomes. The primary outcome was all-cause mortality whereas the secondary outcomes included technical success, procedural success, cardiovascular mortality, rehospitalization for heart failure (HHF), major bleeding, and single leaflet device attachment. The incidence of these outcomes across studies was pooled by a random-effects model.

RESULTS

A total of 21 studies with 896 patients were included. A total of 729 (81.4%) patients underwent isolated TTVR while only 167 (18.6%) patients underwent combined mitral and tricuspid valve repair. Over 80% of the patients used coaptation devices while approximately 20% used annuloplasty devices. The median follow-up duration was 365 days. Technical and procedural success was high at 93.9% and 82.1%, respectively. The pooled perioperative, short-term, and long-term all-cause mortality for patients undergoing TTVR was 1.0%, 3.3%, and 14.1%, respectively. The long-term cardiovascular mortality rate was 5.3% while the HHF rate was 21.5%. Major bleeding and single leaflet device attachment were two major complications, accounting for 14.3% and 6.4%, respectively, during long-term follow-up.

CONCLUSION

TTVR is associated with high procedural success and low procedural and short-term mortality. However, all-cause mortality, cardiovascular mortality, and HHF rates remain high during long-term follow-up.

REGISTRATION

PROSPERO (CRD42022310020).

Impact of severe secondary tricuspid regurgitation on rest and exercise hemodynamics of patients with heart failure and a preserved left ventricular ejection fraction

Background

Both secondary tricuspid regurgitation (STR) and heart failure with preserved ejection fraction (HFpEF) are relevant public health problems in the elderly population, presenting with potential overlaps and sharing similar risk factors. However, the impact of severe STR on hemodynamics and cardiorespiratory adaptation to exercise in HFpEF remains to be clarified.

Aim

To explore the impact of STR on exercise hemodynamics and cardiorespiratory adaptation in HFpEF.

Methods

We analyzed invasive hemodynamics and gas-exchange data obtained at rest and during exercise from HFpEF patients with severe STR (HFpEF-STR), compared with 1:1 age-, sex-, and body mass index (BMI)- matched HFpEF patients with mild or no STR (HFpEF-controls).

Results

Twelve HFpEF with atrial-STR (mean age 72 years, 92% females, BMI 28 Kg/m2) and 12 HFpEF-controls patients were analyzed. HFpEF-STR had higher (p < 0.01) right atrial pressure than HFpEF-controls both at rest (10 ± 1 vs. 5 ± 1 mmHg) and during exercise (23 ± 2 vs. 14 ± 2 mmHg). Despite higher pulmonary artery wedge pressure (PAWP) at rest in HFpEF-STR than in HFpEF-controls (17 ± 2 vs. 11 ± 2, p = 0.04), PAWP at peak exercise was no more different (28 ± 2 vs. 29 ± 2). Left ventricular transmural pressure and cardiac output (CO) increased less in HFpEF-STR than in HFpEF-controls (interaction p-value < 0.05). This latter was due to lower stroke volume (SV) values both at rest (48 ± 9 vs. 77 ± 9 mL, p < 0.05) and at peak exercise (54 ± 10 vs. 93 ± 10 mL, p < 0.05). Despite these differences, the two groups of patients laid on the same oxygen consumption isophlets because of the increased peripheral oxygen extraction in HFpEF-STR (p < 0.01). We found an inverse relationship between pulmonary vascular resistance and SV, both at rest and at peak exercise (R 2 = 0.12 and 0.19, respectively).

Conclusions

Severe STR complicating HFpEF impairs SV and CO reserve, leading to pulmonary vascular de-recruitment and relative left heart underfilling, undermining the typical HFpEF pathophysiology.

Heart failure: an update from the last years and a look at the near future

In the last years, major progress occurred in heart failure (HF) management. Quadruple therapy is now mandatory for all the patients with HF with reduced ejection fraction. Whilst verciguat is becoming available across several countries, omecamtiv mecarbil is waiting to be released for clinical use. Concurrent use of potassium-lowering agents may counteract hyperkalaemia and facilitate renin-angiotensin-aldosterone system inhibitor implementations. The results of the EMPagliflozin outcomE tRial in Patients With chrOnic heaRt Failure With Preserved Ejection Fraction (EMPEROR-Preserved) trial were confirmed by the Dapagliflozin in Heart Failure with Mildly Reduced or Preserved Ejection Fraction (DELIVER) trial, and we now have, for the first time, evidence for treatment of also patients with HF with preserved ejection fraction. In a pre-specified meta-analysis of major randomized controlled trials, sodium-glucose co-transporter-2 inhibitors reduced all-cause mortality, cardiovascular (CV) mortality, and HF hospitalization in the patients with HF regardless of left ventricular ejection fraction. Other steps forward have occurred in the treatment of decompensated HF. Acetazolamide in Acute Decompensated Heart Failure with Volume Overload (ADVOR) trial showed that the addition of intravenous acetazolamide to loop diuretics leads to greater decongestion vs. placebo. The addition of hydrochlorothiazide to loop diuretics was evaluated in the CLOROTIC trial. Torasemide did not change outcomes, compared with furosemide, in TRANSFORM-HF. Ferric derisomaltose had an effect on the primary outcome of CV mortality or HF rehospitalizations in IRONMAN (rate ratio 0.82; 95% confidence interval 0.66-1.02; P = 0.070). Further options for the treatment of HF, including device therapies, cardiac contractility modulation, and percutaneous treatment of valvulopathies, are summarized in this article.

Multimodality Imaging in Valvular Structural Interventions

Structural valvular interventions have skyrocketed in the past decade with new devices becoming available and indications for patients who would previously have been deemed inoperable. Furthermore, while echocardiography is the main imaging tool and the first line for patient screening, cardiac magnetic resonance and CT are now essential tools in pre-planning and post-procedural follow-up. This review aims to address imaging modalities and their scope in aortic, mitral and tricuspid structural valvular interventions, including multimodality imaging. Pulmonary valve procedures, which are mostly carried out in patients with congenital problems, are discussed. This article presents a guide on individualised imaging approcahes on each of the available interventional procedures.

Lifetime Management of Aortic Stenosis: Transcatheter Versus Surgical Treatment for Young and Low-Risk Patients

Transcatheter aortic valve replacement is now indicated across all risk categories of patients with symptomatic severe aortic stenosis and has been proposed as first line option for the majority of patients >74 years old. However, median age of patients enrolled in the transcatheter aortic valve replacement low-risk trials is 74 years and transcatheter aortic valve replacement has never been systematically investigated in young low risk patients. Although the long-term data in surgical aortic valve replacement in young patients (age <75) are well known, such data remain lacking in transcatheter aortic valve replacement. In the absence of clear guideline recommendations in patients with challenging anatomies (eg, hostile calcium, bicuspid), it is important to know the potential advantages and disadvantages of each treatment and to consider how they might integrate with each other in the lifetime management of such patients. In this review, we discuss current outstanding issues on the management of severe aortic stenosis from a lifetime management perspective, particularly in terms of initial intervention and future reinterventions.

Hemodynamics of transcatheter tricuspid valve replacement with Lux-Valve

Objective

Transcatheter tricuspid valve intervention (TTVI) has emerged as an alternative treatment option for high-risk and inoperable patients with symptomatic tricuspid regurgitation (TR). However, scarce data in hemodynamic profiles were available on TTVI. In this paper, we attempt to report the hemodynamic profiles of LuX-Valve.

Methods

30 patients from July 2020 to July 2021 were enrolled in this study. The patient was diagnosed with severe symptomatic TR. The clinical, invasive hemodynamic, and echocardiographic data were collected.

Results

The surgical success rate was 100%. The cardiac index and stroke volume increased sharply from 2.42(2.27, 2.85) and 47.8(43.6, 62.0) to 3.04 ± 0.63 and 57.2 ± 14.7, respectively. With the elimination of TR and the increase of forward blood flow of the tricuspid valve, the extravascular lung water [798.0 (673.0, 1147.0) vs. 850.3 ± 376.1, P < 0.01] increased subsequently. The peak right atrium pressure decreased after Lux-Valve implantation (21.0 ± 6.4 vs. 19.4 ± 6.5, P < 0.05). On the contrary, the nadir right atrium pressure increased [10.0(8.0, 15.0) vs. 12.0(10.0, 17.0), P < 0.01]. Notably, the right atrium pressure difference dropped sharply from 9.0(5.0, 13.0) to 5.0(4.0, 8.0) after Lux-Valve implantation. There was no significant change in the pulmonary artery pressure. The right atrium volume decreased from 128(83, 188) to 91(67, 167) mL at 1 month and 107(66,157) mL at 6 months. With the remolding of the right heart chamber, the tricuspid annulus diameter shrank significantly from 42.5 ± 5.6 to 36.6 ± 6.3 mm at 1 month and 36.0 (33.0, 38.0) at 6 months.

Conclusion

Invasive right atrium pressure may act as a potential candidate for TR evaluation and procedural guidance. Elimination of TR by LuX-Valve implantation improves the cardiac output and right atrium pressure and has no significant effect on the pulmonary artery pressure even with the increment of forward blood flow, suggesting the hemodynamic superiority of transcatheter tricuspid valve replacement but needs further study.

Reference ranges of tricuspid annulus geometry in healthy adults using a dedicated three-dimensional echocardiography software package

Background

Tricuspid annulus (TA) sizing is essential for planning percutaneous or surgical tricuspid procedures. According to current guidelines, TA linear dimension should be assessed using two-dimensional echocardiography (2DE). However, TA is a complex three-dimensional (3D) structure.

Aim

Identify the reference values for TA geometry and dynamics and its physiological determinants using a commercially available three-dimensional echocardiography (3DE) software package dedicated to the tricuspid valve (4D AutoTVQ, GE).

Methods

A total of 254 healthy volunteers (113 men, 47 ± 11 years) were evaluated using 2DE and 3DE. TA 3D area, perimeter, diameters, and sphericity index were assessed at mid-systole, early- and end-diastole. Right atrial (RA) and ventricular (RV) end-diastolic and end-systolic volumes were also measured by 3DE.

Results

The feasibility of the 3DE analysis of TA was 90%. TA 3D area, perimeter, and diameters were largest at end-diastole and smallest at mid-systole. Reference values of TA at end-diastole were 9.6 ± 2.1 cm2 for the area, 11.2 ± 1.2 cm for perimeter, and 38 ± 4 mm, 31 ± 4 mm, 33 ± 4 mm, and 34 ± 5 mm for major, minor, 4-chamber and 2-chamber diameters, respectively. TA end-diastolic sphericity index was 81 ± 11%. All TA parameters were correlated with body surface area (BSA) (r from 0.42 to 0.58, p &lt; 0.001). TA 3D area and 4-chamber diameter were significantly larger in men than in women, independent of BSA (p &lt; 0.0001). There was no significant relationship between TA metrics with age, except for the TA minor diameter (r = −0.17, p &lt; 0.05). When measured by 2DE in 4-chamber (29 ± 5 mm) and RV-focused (30 ± 5 mm) views, both TA diameters resulted significantly smaller than the 4-chamber (33 ± 4 mm; p &lt; 0.0001), and the major TA diameters (38 ± 4 mm; p &lt; 0.0001) measured by 3DE. At multivariable linear regression analysis, RA maximal volume was independently associated with both TA 3D area at mid-systole (R2 = 0.511, p &lt; 0.0001) and end-diastole (R2 = 0.506, p &lt; 0.0001), whereas BSA (R2 = 0.526, p &lt; 0.0001) was associated only to mid-systolic TA 3D area.

Conclusions

Reference values for TA metrics should be sex-specific and indexed to BSA. 2DE underestimates actual 3DE TA dimensions. RA maximum volume was the only independent echocardiographic parameter associated with TA 3D area in healthy subjects.