Tricuspid regurgitation secondary to mitral valve disease: tricuspid annulus function as guide to tricuspid valve repair

Annular remodelling predicts outcome in isolated severe tricuspid regurgitation: a registry-based echocardiographic analysis

AIMS

Depending on volume status, secondary tricuspid regurgitation (sTR) has a strong dynamic component. In contrast, associated structural dilatation of the tricuspid annulus and the right heart chambers may be less volume dependent. This study aimed to assess the prognostic value of right heart remodelling in isolated severe sTR (isoTR).

METHODS AND RESULTS

A total of 36 000 patients from the longitudinal echocardiographic database of our tertiary centre were screened for severe isoTR [vena contracta (VC) ≥ 7 mm] in the absence of atrial fibrillation (AF), other valve disease, and/or reduced systolic left ventricular function. Echocardiographic examinations were re-read, focusing on right ventricular (RV) parameters and on quantitative and qualitative parameters of isoTR. All-cause mortality was defined as the primary endpoint. Two hundred and sixteen patients fulfilled the inclusion criteria. Severe TR was predominant; only few were classified in the new grades massive [n = 23 (10%)] and torrential TR [n = 4 (2%)]. During a median follow-up of 35 months (20-53), all-cause mortality was 31% (n = 67). Multivariate Cox regression analysis revealed no association of VC, effective regurgitant orifice area, or regurgitant volume with all-cause mortality. However, indexed RV end-diastolic diameter (P < 0.001), indexed right atrial dimensions (P = 0.019), and particularly tricuspid valve (TV) annulus diameter diastole index (P = 0.002) and TV annulus diameter systole index (P = 0.001) were significantly associated with outcome.

CONCLUSION

Severe isolated TR in the absence of AF is a rare finding with a grim prognosis. Tricuspid annular diameter dimensions rather than quantitative measures of TR proved to be of significant prognostic value indicating a continuous remodelling leading to a 'point of no return' with a dismal outcome.

Effect of concomitant tricuspid annuloplasty on postoperative wound complications in heart failure patients undergoing mitral valve repair

Tricuspid valve repair (TVR) combined with mitral valve surgery (MVS) has been a controversial issue. It is not clear whether the combined surgery has any influence on the occurrence of postoperative complications. The aim of this study was to compare the occurrence of complications including wound infection, wound bleeding, and mortality after MVS combined with or without TVR. By meta-analysis, a total of 1576 papers were collected from 3 databases, and 7 of them were included. We provided the necessary data of 7 included studies such as the authors, publication date, country, surgical approach and case number, patient age, and so on. Statistical analysis was carried out with RevMan 5.3 software. We found that patients with heart failure accepting MVS combined with or without TVR, performed no statistically significant difference in postoperative wound infection (OR: 0.88; 95% CI: 0.29, 2.62; P = 0.81), wound bleeding (OR: 0.74; 95% CI: 0.3, 1.48; P = 0.39), and mortality (OR: 1.05; 95% CI: 0.42, 2.61; P = 0.92). In conclusion, current evidence indicated that the combined surgery had no additional risk of postoperative complications, and might be an effective alternative surgical approach to mitral valve diseases accompany with tricuspid regurgitation. However, for the limited case size, it was required to support the findings with a large number of cases in further studies.

Incremental value of tricuspid annular enlargement to progressive tricuspid regurgitation in patients with longstanding persistent atrial fibrillation

Tricuspid annular enlargement in patients with atrial fibrillation (AF) can induce tricuspid regurgitation (TR). However, risk factors associated with TR progression in patients with AF have not been defined. This study aimed to clarify an association between tricuspid annular diameter (TAD) and TR progression in patients with longstanding persistent AF. We retrospectively analyzed data from 228 patients who had longstanding persistent AF for > 1 year and mild or less TR on baseline echocardiograms. We defined significant TR as moderate or greater TR, graded according to the jet area and vena contracta. The optimal cut-off value of the TAD index (TADI), based on body surface area for predicting progression to significant TR, was estimated using receiver operating characteristic (ROC) curves. The independence and incremental value of the TADI were evaluated using multivariate Cox proportional hazard regression analysis and likelihood ratio tests. Over a median follow-up of 3.7 years, 55 (24.1%) patients developed significant TR. The optimal cut-off value of 21.1 mm/m2 for the TADI at baseline and ROC curves predicted TR progression with 70.4% sensitivity and 86% specificity. Furthermore, TADI was an independent predictor of TR progression (hazard ratio, 1.32; 95% confidence interval, 1.17-1.49, P < 0.001) and had a significant incremental value that exceeded that of models constructed using clinical parameters. In conclusion, TADI was significantly associated with TR progression and was an independent predictor of TR progression in longstanding persistent AF.

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.

Incidence of and Risk Factors for the Development of Significant Tricuspid Regurgitation after Isolated Aortic Valve Replacement

Background

The late progression of tricuspid regurgitation (TR) after mitral valve surgery is well known. However, few reports have described the progression of TR after aortic valve surgery. We investigated the incidence of and risk factors for the development of significant TR after isolated aortic valve replacement (AVR).

Methods

This study analyzed patients with less than moderate TR who underwent isolated AVR at Seoul National University Hospital from January 1990 to December 2018. Significant TR was defined as moderate or higher. Echocardiographic follow-up was performed in all patients. The Fine-Gray model was used to identify clinical risk factors for the development of significant TR.

Results

In total, 583 patients (61.7±14.2 years old) were included. Operative mortality occurred in 9 patients (1.5%), and the overall survival rates at 10, 20, and 25 years were 91.1%, 83.2%, and 78.9%, respectively. Sixteen patients (2.7%) developed significant TR during the follow-up period (13 moderate; 3 severe). The cumulative incidence of significant TR at 10, 20, and 25 years was 0.77%, 3.83%, and 6.42%, respectively. No patients underwent reoperation or reintervention of the tricuspid valve. Hemodialysis or peritoneal dialysis for chronic kidney disease (hazard ratio [HR], 5.188; 95% confidence interval [CI], 1.154-23.322) and preoperative mild TR (HR, 5.919; 95% CI, 2.059-17.017) were associated with the development of significant TR in the multivariable analysis.

Conclusion

TR progression after isolated AVR in patients with less than moderate TR is rare. Preoperative mild TR and hemodialysis or peritoneal dialysis for chronic kidney disease were significant risk factors for the development of TR.

Prognostic Predictors of Tricuspid Regurgitation Worsening after Mitral Regurgitation Surgery with Mild Tricuspid Regurgitation

We aimed to investigate the prevalence and predictors of postoperative tricuspid regurgitation (TR) worsening in patients with mitral regurgitation (MR) and concomitant ≤mild TR. A total of 620 patients underwent surgery for MR from 2013 to 2017. Of these, 260 had ≤mild preoperative TR and no concomitant tricuspid valve surgery and were enrolled in this single-center retrospective study. The primary endpoint was postoperative worsening of ≥moderate TR. The primary endpoint occurred in 28 of 260 patients (11%) during the follow-up period [median: 4.1 years (interquartile range: 2.9-6.1 years)]. In the multivariable analysis, age, female sex, and left atrial volume index (LAVI) were significant predictors of the primary outcome during intermediate-term follow-up (age: hazard ratio [HR] 1.05 per 1-year increment, 95% confidence interval [CI] 1.02-1.10, p = 0.003; female sex: HR 3.53, 95% CI 1.61-7.72, p = 0.002; LAVI: HR 1.17 per 10-mL/m² increment, 95% CI 1.07-1.26, p < 0.001). The optimal LAVI cut-off value for predicting postoperative TR worsening was 79 mL/m² (area under the curve: 0.69). A high LAVI (>79 mL/m²) was significantly associated with a low rate of freedom from postoperative TR worsening compared with a low LAVI (≤79 mL/m²) (82.6% vs. 93.9% at 5 years, respectively; log-rank p = 0.008). In patients with ≤mild preoperative TR and no concomitant tricuspid surgery, the rate of postoperative TR worsening was 11% during intermediate-term follow-up. LA enlargement in patients with MR and ≤mild preoperative TR was significantly associated with postoperative TR worsening.

Prognostic implication of right ventricular dysfunction and tricuspid regurgitation following transcatheter aortic valve replacement

OBJECTIVES

Right ventricular (RV) dysfunction and tricuspid regurgitation (TR) are associated with adverse outcomes in severe aortic stenosis (AS) patients. Our aim was to evaluate the association between ≥moderate TR and RV dysfunction on long-term mortality following transcatheter aortic valve replacement (TAVR).

METHODS

A retrospective analysis of the Israeli multicenter TAVR registry among 4,344 consecutive patients, with all-cause mortality as the main outcome measure.

RESULTS

Echocardiographic assessment of TR grade and RV dysfunction was available for 3,733 and 1,850 patients, of whom ≥moderate TR and RV dysfunction was noted for 478(13%) and 78(4%), respectively. The mean follow-up time was 2.9 ± 2.3 years. In univariate models, ≥Moderate TR and ≥moderate RV dysfunction were associated with increased long-term mortality (HR 1.45, 95% CI 1.24-1.69, p < .001 and HR 1.73, 95% CI 1.21-2.47, p = 0.003, respectively). These finding did not remained significant after adjusting to echocardiographic parameters. A subset of patients with no improvement in RV function had the highest long-term mortality risk (HR 3.3, 95% CI 1.95-5.7, p < .001).

CONCLUSION

When adjusted to multiple echocardiographic characteristics baseline ≥Moderate TR and ≥moderate RV dysfunction were not associated with long-term mortality following TAVR. Persistent RV dysfunction following TAVR was associated with the highest risk for mortality.

Outcome of consistent guideline-based tricuspid management in patients undergoing degenerative mitral regurgitation correction

Objectives

Despite coherent guidelines, management of functional tricuspid regurgitation (FTR) consequences on outcome in the context of degenerative mitral regurgitation (DMR) remains controversial due to lacking series of large magnitude with rigorous application of tricuspid guidelines and strict long-term echocardiographic follow-up. Thus, we aimed at gathering such a cohort to examine outcomes of patients undergoing DMR surgery following tricuspid surgery guidelines.

Methods

All consecutive patients with isolated DMR 2005-2015 operated on with baseline FTR assessment and tricuspid annulus diameter measurement were identified. Operative complications, postoperative tricuspid regurgitation incidence, and survival were assessed overall and stratified by guideline-based tricuspid annuloplasty (TA) indication (severe FTR or tricuspid annulus diameter ≥40 mm).

Results

Among 441 patients with DMR undergoing mitral repair (66 ± 13 years, 30% female, ejection fraction 66 ± 10%, systolic pulmonary artery pressures 39 ± 12 mm Hg) followed 6 [3-9] years, patients with TA (n = 234, 53%) had generally similar presentation versus without TA (n = 207, 47%; all P ≥ .2) except for more atrial fibrillation and larger left ventricle (both P ≥ .0003). Patients with TA showed longer bypass time, more maze procedures (all P ≤ .001), but hospital stay, renal-failure, pacemaker implantation, and operative mortality (overall 0.9%) were comparable (all P ≥ .2). Postoperative incidence of moderate/severe FTR (0% at 1 year) became over time greater among patients without TA (5-year 8% [4%-13%] vs 3% [1%-11%] and 10-year 10% [6%-16%] vs 4% [1%-16%], P = .01). Survival (95% confidence interval) throughout follow-up was 85% (77%-89%) at 10 years, with hazard ratio 0.57 (0.29-1.10), P = .09. for patients with TA versus without.

Conclusions

In this large surgical DMR cohort, guideline-based FTR management was safe and effective. While long-term mortality did not reach significance, postoperative incidence of moderate/severe FTR, overall low, was nevertheless greater in patients who did not appear to require TA at surgery and linked to tricuspid annular dimension. Thus, future multicenter prospective cohorts with long-term follow-up are warranted to re-examine thresholds for TA performance and impact on survival.

Association between computed tomography-derived tricuspid annular dimensions and prognosis: insights from whole-beat computed tomography assessment

Aims

Tricuspid regurgitation (TR) has been associated with outcome in patients treated with transcatheter aortic valve implantation (TAVI). Tricuspid annulus (TA) dimensions are associated with TR. However, the TA is highly dynamic during the cardiac cycle, and the interaction between the TA dimensions, TR, and patient prognosis has never been evaluated. This study aimed to characterize the dynamics of the TA along with the cardiac cycle and its association with prognosis in patients undergoing TAVI.

Methods and results

Patients with severe aortic stenosis who underwent whole-beat computed tomography (n = 393, mean age 80 ± 7 years, 53% male) were included. The ratio between anterior-posterior (AP) and septal-lateral (SL) diameter of the TA was calculated at end-systole (ES), mid-diastole (MD), and end-diastole (ED) to characterize the TA shape throughout the cardiac cycle. The primary endpoint was all-cause mortality. During a median follow-up of 3.6 (1.7–5.5) years, 146 patients died. While all the TA parameters at ES and MD were not associated with all-cause mortality, a low AP/SL ratio at ED (more circular geometry) was independently related with all-cause mortality (hazard ratio: 4.717, 95% confidence interval: 1.481–15.152; P = 0.009). In addition, a more circular TA shape at ED (AP/SL ratio < 1.20) was also associated with more right atrial and ventricular dilation, more frequently significant TR, and a higher prevalence of atrial fibrillation.

Conclusion

Circular remodelling of the TA shape at ED is associated with more right atrial and ventricular dilation, and a higher long-term mortality after TAVI. The evaluation of the TA shape at ED may be a useful parameter in the risk stratification of patients undergoing TAVI.

Natural Course of Nonsevere Secondary Tricuspid Regurgitation

BACKGROUND

Secondary tricuspid regurgitation (sTR) is frequent in patients with heart failure with reduced ejection fraction and is associated with adverse outcomes despite guideline-directed therapy. However, little is known about the natural course of nonsevere sTR and its relation to cardiac remodeling and outcomes. The aims of this study were therefore to investigate the natural course of sTR progression using quantitative measurements, to assess the prognostic impact on long-term mortality, and to identify risk factors associated with progressive sTR.

METHODS

A total of 216 patients with heart failure with reduced ejection fraction receiving guideline-directed therapy were included in this long-term observational study. Progression of sTR was quantitatively defined as an increase of 0.2 cm² in effective regurgitant orifice area or 15 mL in regurgitant volume, with transition to at least moderate sTR. Kaplan-Meier and Cox regression analyses were applied to assess survival during a 5-year follow-up period.

RESULTS

Among patients with nonsevere sTR at baseline, 62 (29%) experienced sTR progression. Progressive sTR was accompanied by larger left and right atrial volumes (P = .02 and P < .02, respectively) and a higher prevalence of atrial fibrillation (P < .04). During a median follow-up period of 60 months (interquartile range, 37-60 months), 82 patients died. Progression of sTR conveyed a higher risk for long-term mortality (hazard ratio, 1.77; 95% CI, 1.1-2.83; P < .02), even after multivariate adjustment for bootstrap-selected (adjusted hazard ratio, 1.70; 95% CI, 1.06-2.74; P < .03) and clinical confounder (adjusted hazard ratio, 1.80; 95% CI, 1.07-3.05; P < .03) models.

CONCLUSIONS

The incidence of progressive sTR despite guideline-directed therapy is associated with adverse cardiac and valvular remodeling as well as a significantly higher long-term mortality. Biatrial enlargement as well as atrial fibrillation are associated with the development of subsequent progressive sTR and may help identify patients at risk for sTR progression, potentially creating a window of opportunity for closer follow-up and newly arising minimally invasive transcatheter repair therapies.

Mechanical and Structural Evaluation of Tricuspid Bicuspidization in a Porcine Model

INTRODUCTION

Tricuspid regurgitation (TR) affects approximately 1.6 million Americans and is associated with just a 63.9% 1-year survival rate in its moderate to severe forms due to its asymptomatic nature and late diagnosis and surgical referral. As a result, industrial fervor has begun to broach this topic, with several percutaneous treatment devices currently under development. As much remains unknown about the tricuspid apparatus, the mechanics of these procedures remain unquantified. In this study, a testing apparatus and technique for the evaluation of percutaneous tricuspid valve (TV) bicuspidization were developed for the evaluation of these parameters in twelve porcine hearts.

METHODS

The passive relaxed myocardial state and the active contracted state were each induced in six porcine hearts and the bicuspidization experiment was run twice, the second time after induction of TR. TV annular area, cinching force, static leakage through the TV annulus, and annular ellipticity were quantified and compared among the groups.

RESULTS

The use of phenol was effective to induce functional TR by increased annular area. Cinching force was not found to differ between any of the testing states, but the bicuspidization experiment was able to reduce the TR annular area to that of its healthy counterpart in addition to reducing static leakage through the TV annulus. Despite appropriately reducing the area, bicuspidization was found to induce a more circular TV annular shape.

CONCLUSION

Taken together, these results provide a first mechanical analysis of the TV bicuspidization mechanism and may serve as a point of reference for future clinical animal studies.

Echocardiography and Correction of Mitral Regurgitation: An Unbreakable Link

Background: Degenerative mitral valve (MV) disease causing mitral regurgitation (MR) is the most common organic valve pathology and is classified based on leaflet motion. MV repair is indicated as the preferred technique (Class I indication) when the results are expected to be durable. Therefore, a detailed and systematic evaluation of MV apparatus is pivotal in allowing the proper surgical planning, as well as the screening for trans catheter-based treatment when surgery is not indicated. Aim: The aim of the present review is to describe the crucial role of both Transthoracic Echocardiography (TTE) and Transesophageal Echocardiography (TEE) in the decisional process and the guidance of MV repair procedures. TTE is the main investigation and the first approach used to make diagnosis of MR, to assess the severity and to describe the underlying mechanism, while TEE, especially with 3D echocardiography, has been shown to be useful for clarifying complicated valvular anatomy, assessing the surgical result and detecting complications. The surgical treatment of MR takes advantage of ultrasound evaluation of MV apparatus at any stage of the process, thus making the link between surgery and echocardiography unbreakable throughout the perioperative phase.

Preliminary evaluation of autologous pericardium ring for tricuspid Annuloplasty: a two-year follow-up study

Objective

To evaluate the effectiveness of autologous pericardium ring in tricuspid annuloplasty surgery for the treatment of tricuspid regurgitation (TR).

Methods

From December 2010 to December 2012, a total of 107 patients with secondary TR underwent tricuspid annuloplasty. The patients were divided into three groups: autologous pericardium ring group (n = 38), Edwards-MC3 ring group (n = 35), and DeVega group (n = 34). The patients were followed-up for two years. The survival rates and free from hospital readmission rates were measured and analyzed. The patients also received transthoracic echocardiography (TTE) in order to obtain TR regurgitant jet area to right atrial area (S_TR/S_TA), diastolic tricuspid annuloplasty diameter (DTAD), right atrial diameter (RAD), and right ventricular diameter (RVD).

Results

One patient from DeVega group and one patient from autologous pericardium ring died from low cardiac output syndrome during the perioperative period. In the two-year follow-up period, each group has one instance of death for unclear reasons. One month after operation, the S_TR/S_TA, DTAD, RAD, and RVD values in all groups were significantly lower than the pre-operation values (P < 0.05). During the two year follow-up period, DTAD values of patients from DeVega group increased significantly as compared to the values at one month post operation (P<0.05), which is different from the other two groups in which DTAD values remained stable (P>0.05). In both pericardium ring group and Edwards-MC3 group, S_TR/S_RA, remained stable (P>0.05) during the follow-up period, whereas S_TR/S_RA of the DeVega group had showed a tendency of increase (although statistically insignificant, P>0.05). There was no significant difference in the survival rates among three study groups (P > 0.05), but the rate of free from hospital readmission in the DeVega group was significantly lower than those in the other two groups (P < 0.05) during the two-year follow-up period.

Conclusions

Autologous pericardium tissue based ring annuloplasty demonstrated remarkable clinical utility for treating tricuspid regurgitation. It shows similar beneficial results to Edwards-MC3 annuloplasty within a short-term follow-up period, and outperforms the widely used DeVega annuloplasty. Autologous pericardium tissue annuloplasty represents a promising technique for tricuspid annuloplasty and holds great potential for treating tricuspid valve dysfunctions.

Normal Reference Values and Reproducibility of Tricuspid Annulus Dimensions Using Cardiovascular Magnetic Resonance

Tricuspid annular (TA) dilation is a key process in functional tricuspid regurgitation, but normal TA dimensions using cardiovascular magnetic resonance have not been established. We measured TA diameters in 66 healthy volunteers, aged 38 ± 11 years, during 3 different phases of the cardiac cycle (end-systole, early diastole, and end-diastole) and in 2 routinely acquired cardiovascular magnetic resonance imaging planes (4-chamber [4C] and right ventricular inflow-outflow [RVIO]). Three readers independently measured each value and 1 reader repeated measurements 1 month apart. The upper limit of normal (ULN) was calculated as 1.96 standard deviations above the mean. We assessed inter- and intraobserver reliability using the intraclass correlation coefficient (ICC) and Bland-Altman analysis. We found the TA diameter largest during early diastole in the 4C view with an ULN of 43 mm (22 mm/m²). Men had larger absolute TA diameters (36 mm, 95% CI 27 to 44 mm) than women (30 mm, 95% CI 23 to 37 mm) but not after indexing for body surface area (both 18 mm/m²). In the RVIO view, the largest TA diameter occurred during early diastole with a ULN value of 46 mm (27 mm/m²). In this view, females had a larger indexed TA than men (21 mm/m² vs 17 mm/m²). Reproducibility of measurements was excellent in all cardiac phases with an inter-rater ICC between 0.90 to 0.96 and an intrarater ICC 0.89 to 0.96. In conclusion, we have provided normative data regarding TA dimensions in routinely acquired 4C and RVIO views, and these values are larger than the current thresholds of annular dilation measured by echocardiography. Gender differences with the TA diameter in the RVIO view may be an important finding with consideration of future tricuspid devices.

Right-Sided Heart Structural and Functional Remodeling in Mitral Regurgitation Secondary to Mitral Valve Prolapse

Preoperative evaluation of the mitral valve but also of tricuspid valve and right ventricular (RV) function is mandatory in primary mitral regurgitation (MR) secondary to mitral valve prolapse (MVP). Tricuspid annulus (TA) diameter plays a pivotal role in the surgical decision to perform preventive combined tricuspid valve annuloplasty. Cardiac magnetic resonance (CMR) is the gold standard for the assessment of RV size and function. Based on 70 consecutive patients (17 women; mean age 64 ± 12) with severe MR secondary to MVP referred for CMR, we sought to assess RV geometry and function and TA dimensions and to study the interaction between TA dilatation and right-sided cardiac chambers. Frequency of RV dilatation, RV systolic dysfunction, and TA dilatation (TA diameter ≥ 40 or 21 mm/m²) were 11%, 51%, and 49%, respectively. Left ventricular (LV) end-diastolic volume index was the only independent predictor of RV dilatation. Presence of symptoms, larger LV end-diastolic volume index, and LV ejection fraction <60% were independently associated with RV dysfunction. Absolute TA diameter was 36 ± 6 mm and TA diameter index was 20 ± 3 mm/m². Reproducibility TA diameter measurement was excellent (coefficient of variation ≤10%). TR velocity >220 cm/s (odds ratio = 20.17; [3.57 to 113.90]; p = 0.001 and right atrial volume index ≥ 38 ml/m² (odds ratio = 13.44; [3.57 to 50.54]; p = 0.0001) were independent predictors of TA diameter ≥40 or 21 mm/m². CMR provides accurate right-sided cardiac chambers assessment and may help surgical planning of concomitant tricuspid valve annuloplasty before mitral valve repair in severe MR secondary to MVP. In conclusion, TA dilatation, RV enlargement, and dysfunction are related to pulmonary pressure and left-sided cardiac chambers enlargement, reflecting the long-standing consequences of severe MR.

Three-dimensional Tricuspid Area. A New Criterion to Improve Patient Selection for Annuloplasty in Tricuspid Regurgitation

INTRODUCTION AND OBJECTIVES

Late functional tricuspid regurgitation after rheumatic left-sided valve surgery is an important predictor of poor prognosis. This study investigated the usefulness and accuracy of 3-dimensional transthoracic echocardiography tricuspid area compared with conventional 2-dimensional diameter (2DD) for assessing significant tricuspid annulus dilatation, providing cutoff values that could be used in clinical practice to improve patient selection for surgery.

METHODS

We prospectively included 109 patients with rheumatic heart disease in the absence of previous valve replacement. Tricuspid regurgitation was divided into 3 groups: mild, moderate, and severe. Optimal 3-dimensional area (3DA) and 2DD cutoff points for identification of significant tricuspid annulus dilatation were obtained and compared with current guideline thresholds. Predictive factors for 3DA dilatation were also assessed.

RESULTS

Optimal cutoff points for both absolute and adjusted to body surface area (BSA) tricuspid annulus dilatation were identified (3DA: 10.4 cm², 6.5 cm²/m²; 2DD: 35 mm, 21 mm/m²); 3DA/BSA had the best diagnostic performance (AUC=0.83). Three-dimensional transthoracic echocardiography tricuspid area helped to reclassify surgical indication in 14% of patients with mild tricuspid regurgitation (95%CI, 1%-15%; P=.03) and 37% with moderate tricuspid regurgitation (95%CI, 22%-37%; P<.0001), whereas 3DA/BSA changed surgery criteria in cases of mild tricuspid regurgitation (17%; 95%CI, 3%-17%; P=.01) compared with 2DD/BSA. On multivariable analysis, right and left atrial volumes and basal right ventricle diameter were independently correlated with 3DA.

CONCLUSIONS

The current 40 mm threshold underestimates tricuspid annulus dilatation. Although 21 mm/m² seems to be a reasonable criterion, the combination with 3DA assessment improves patient selection for surgery.

Intraoperative method based on tricuspid annular circumference in patients with mild or no tricuspid regurgitation during left-sided cardiac valve surgery for the prophylactic tricuspid annuloplasty

Background

During left-sided cardiac valve surgery in patients with mild or no tricuspid regurgitation (TR), the tricuspid valve exploration plays a vital role in the decision-making of concomitant tricuspid annuloplasty. Currently lack of an appropriate standard to define tricuspid annular dilatation is a challenge. The aim of this study is to introduce and evaluate an alternative intraoperative method for Tricuspid Valve annuloplasty based on annular circumference that could trace the extent of annular dilatation and predict TR-progression, which can also guide the surgeons to intraoperative decision.

Methods

From January 2011 to December 2011, 131 patients (73 females, 58 males, and mean age 54±10.8) were selected for the study underwent left-sided cardiac valve surgery at Anzhen Hospital, all the subjects preoperatively diagnosed with non-significant TR. The enrolled subjects were followed-up over 5years for TR-progression. Tricuspid annular circumference (TAC) measurement was performed via special sizer for each patient, and the obtained values divided on the subject's body surface area (BSA) to achieve the tricuspid annular circumference index (TACI). The endpoint was set as the TR-progression by more than two grades, or a final TR grade ≥3+.

Results

The mean follow up period was 68±3.8 months (range, 60-77 months). In univariate, multivariate and logistic regression analysis three variables were noticed to be associated with TR progression, female gender (P<0.002), body mass index (BMI) (P<0.021), and intraoperatively measured TACI (P<0.001). But in multiple regression the TACI (OR 0.812; 95% CI: 0.748-0.883; P<0.001) was the single parameter which significantly related to TR-progression. Based on the receiver-operator curve (ROC), it was likely to derive an optimal cut-off 80.2 mm/m² which could predict the postoperative development of TR with acceptable sensitivity and specificity 69%, 89%.

Conclusions

Patients with mild or no TR undergoing left-sided valve surgery, intraoperative measurement of the TAC proved to be an ideal method to judge the tricuspid-annulus, it is capable to predict TR-progression. For prophylactic tricuspid repair a presumed TACI of 80.2 mm/m² is recommended as an indicative threshold.

[Management of multiple valve disease]

Polyvalvular disease is not a rare condition, the lack of specific data for each situation does not allow perfoming standardized management and guidelines. We want to present by this review available data on the management of polyvalvular disease, taking into account different possible associations between the valve lesions.

State-of-the-Art Review of Echocardiographic Imaging in the Evaluation and Treatment of Functional Tricuspid Regurgitation

Functional or secondary tricuspid regurgitation (TR) is the most common cause of severe TR in the Western world. The presence of functional TR, either isolated or in combination with left heart disease, is associated with unfavorable natural history. Surgical mortality for isolated tricuspid valve interventions remains higher than for any other single valve surgery, and surgical options for repair do not have consistent long-term durability. In addition, as more patients undergo transcatheter left valve interventions, developing transcatheter solutions for functional TR has gained greater momentum. Numerous transcatheter devices are currently in early clinical trials. All patients require an assessment of valve morphology and function, and transcatheter devices typically require intraprocedural guidance by echocardiography. The following review will describe tricuspid anatomy, define echocardiographic views for evaluating tricuspid valve morphology and function, and discuss imaging requirements for the current transcatheter devices under development for the treatment of functional TR.

Severe tricuspid regurgitation after mitral valve surgery: the risk factors and results of the aggressive application of prophylactic tricuspid valve repair

Purpose

This study aimed to examine the risk factors for severe postoperative tricuspid regurgitation (TR) in patients undergoing mitral valve surgery. We also studied the effects of prophylactic tricuspid valve repair (TVR) on severe postoperative TR.

Methods

We retrospectively studied 125 patients without severe TR who underwent mitral valve surgery from 1987 to 2006. Patients did not undergo TVR before 1998 (the early period, n = 54). In 1998 (the late period, n = 71), patients with a preoperative tricuspid annular diameter of ≥35 mm underwent TVR using an annuloplasty ring (n = 52).

Results

In the analysis of the early period, the rates of freedom from severe TR at 10 and 20 years after surgery were 76 and 59 %, respectively. A multivariate analysis identified moderate preoperative TR as a significant risk factor for severe TR. In the late period, none of the 52 patients who underwent TVR developed severe TR. However, 4/19 patients who did not undergo TVR developed severe TR, and all of these four patients had a preoperative tricuspid annular diameter of ≤35 mm.

Conclusions

Moderate preoperative TR is a significant risk factor for severe postoperative TR in patients undergoing mitral valve surgery. The aggressive application of TVR can prevent severe postoperative TR; however, tricuspid annular dilatation might not be a good indicator for TVR.

Tricuspid Annular Size and Regurgitation Progression After Surgical Repair for Degenerative Mitral Regurgitation

The late worsening of nonsevere tricuspid regurgitation (TR) after mitral valve surgery is a relevant clinical problem that can lead to high-risk reoperation. Although tricuspid annulus (TA) dilatation has been proposed for prophylactic annuloplasty to prevent TR worsening, prospective data in degenerative mitral regurgitation (MR) are lacking. The aim of this prospective cohort study was to evaluate TA dimension to predict TR progression after valve repair for degenerative MR. Clinical and echocardiographic evaluation of 706 patients with degenerative MR and no significant TR was obtained preoperatively and at follow-up after isolated mitral valve repair. Together with standard cardiac chamber and valve analysis, 3-dimensional (3D) transesophageal echocardiography was performed to evaluate TA, including the anteroposterior and septolateral diameters. After a mean follow-up of 24 ± 15 months (range 6 to 60), 2 patients died while 14 developed severe MR. Compared with preoperative values, TR decreased (≤1 degree) in 227 patients, was unchanged in 437, and increased (≥1 degree) in 39 patients, with the development of significant TR (3 to 4 degree) in 3 patients. Receiver-operating characteristic curve analysis did not identify significant TA values predicting postoperative TR worsening. On multivariate regression analysis, recurrent MR and pulmonary hypertension at follow-up emerged as significant positive predictors of TR progression. Newly developed significant TR is a rare event after successful repair of degenerative MR. Although more accurate than conventional 2D measurement, 3D analysis of TA does not predict early to midterm subsequent TR progression.

Comparison of 2-Dimensional, 3-Dimensional, and Surgical Measurements of the Tricuspid Annulus Size: Clinical Implications

BACKGROUND

Associated tricuspid annuloplasty is recommended during left-heart valve surgery when the tricuspid annulus (TA) is dilated but methodology for the measurement of TA size and thresholds for TA enlargement are not clearly defined.

METHODS AND RESULTS

Measurement of the TA diameter (TAD) was prospectively performed using 2-dimensional transthoracic echocardiography (2D-TTE) in 282 patients in 4 different views (parasternal long axis, parasternal short axis, apical 4-chamber [A4C], and subcostal). TAD was also measured using 3D-transesophageal echocardiography in 183 patients (long axis), peroperatively in 120 patients who underwent a tricuspid valve surgery and using TTE (A4C) in 66 healthy volunteers. TAD was significantly different between the 4 2D-TTE views (3.85±0.58, 3.87±0.61, 4.02±0.69, and 3.92±0.65 cm, respectively; P<0.0001) but differences were small and the A4C was the most feasible (76%, 65%, 92%, and 73%, respectively; P<0.0001) and offered the highest reproducibility. TAD measured in A4C view was smaller than when measured by 3D-transesophageal echocardiography (3.90±0.63 versus 4.33±0.62 cm; P<0.0001) but correlation was excellent (r=0.84; P<0.0001) with a systematic 4-mm underestimation. In contrast, 2D-TTE measurements were significantly smaller and only modestly correlated to surgical measurements (4.11±0.61 versus 4.37±0.75 cm; P<0.0001; r=0.57; P<0.0001) which were poorly reproducible. In healthy volunteers, we suggested 42 mm or 23 mm/m(2) as pathological values for the TAD in A4C.

CONCLUSIONS

Measurements of the TAD using 2D-TTE in A4C were highly feasible and reproducible and despite being systematically smaller than 3D measurements, accurately reflected the degree of TA enlargement as assessed using 3D transesophageal echocardiography. We proposed the thresholds that may be used in future prospective studies to demonstrate whether a preventive strategy would improve the outcome.

Two and three dimensional echocardiography for pre-operative assessment of mitral valve regurgitation

Mitral regurgitation may develop when the leaflets or any other portion of the apparatus becomes abnormal. As the repair techniques for mitral valve disease evolved, so has the need for detailed and accurate imaging of the mitral valve prior to surgery in order to better define the mechanism of valve dysfunction and the severity of regurgitation. In patients with significant mitral valve disease who require surgical intervention, multiplane transesophageal echocardiogram (TEE) is invaluable for surgical planning. However, a comprehensive TEE in a patient with complex mitral valve disease requires great experience and skill. There is evidence to suggest that 3D echocardiography can overcome some of the limitations of 2D multiplane TEE and thus is crucial in evaluation of patients undergoing mitral valve surgery. In the following sections, we review some of the crucial 2D and 3D echo images necessary for evaluation of MR based on the Carpentier classification.

The tricuspid valve in adult congenital heart disease

The tricuspid valve is frequently affected in adults with congenital heart disease but is also frequently overlooked. Disease of this valve can occur primarily or develop secondary to changes in the right ventricle caused by other disease states. The embryology and anatomy of the tricuspid valve are important to understanding pathogenesis of valve dysfunction in congenital heart disease. Clinical findings can be subtle. Multimodality imaging may be necessary to fully assess the cause and impact of tricuspid valve lesions. More research is needed in pathophysiology, imaging, and treatment in this area.

Management of tricuspid regurgitation

Secondary tricuspid regurgitation is the most frequent type of tricuspid insufficiency in western countries. Its surgical treatment is still an object of debate both in terms of timing and surgical techniques. Until recently, the avoidance of surgery for tricuspid repair was commonly accepted in patients with less than severe secondary tricuspid regurgitation undergoing left-sided valve surgery. More recently, compelling evidence in favour of a more aggressive surgical approach in this setting has emerged. The surgical technique should be tailored to the stage of disease. Ring annuloplasty is more durable than suture annuloplasty and represents the method of choice in the presence of isolated annular dilatation. In patients in whom the dilatation of the tricuspid annulus is combined with significant leaflet tethering, annuloplasty alone is unlikely to be durable and additional procedures have been proposed in order to achieve a more durable repair. In this review, pathophysiology, surgical indications, techniques of repair and outcomes of secondary tricuspid regurgitation will be discussed. We will also focus on the challenging issue of significant tricuspid regurgitation occurring late after left-sided valve surgery. Finally, the current and future role of percutaneous tricuspid valve technologies will be briefly described.

Prevalence and impact of preoperative moderate/severe tricuspid regurgitation on patients undergoing transcatheter aortic valve replacement

OBJECTIVES

Significant tricuspid regurgitation (TR) is a marker for late-stage myocardial and valvular heart disease. Whether preoperative TR affects clinical outcomes of patients undergoing transcatheter aortic valve replacement (TAVR) has never been investigated. This study sought to identify the impact of moderate and severe TR on outcomes after TAVR.

METHODS

All patients undergoing TAVR from January 2007 to August 2012 at St. Paul's Hospital, Vancouver, Canada, (n = 518) were dichotomized according to the severity of preoperative TR (moderate/severe vs. none/mild). All clinical outcomes were defined according to the valve academic research consortium-2 definitions.

RESULTS

At baseline, moderate or severe TR was reported in 79 patients (15.2%). At 30 days, moderate/severe TR had improved in 12 patients (15.2%), was unchanged in 46 patients (58.3%), and worsened in 7 patients (8.9%). Of those with none/mild TR at baseline, 35 (7.9%) patients had moderate TR at 30-day follow-up. Two-year all-cause (38.4% vs. 20.0%, Log-rank test, P = 0.001) and cardiac mortality (12.9% vs. 4.6%, Log-rank test, P = 0.004) as estimated by Kaplan-Meier analysis were considerably higher in patients with significant TR. However, significant TR did not emerge as independent risk factor for 2-year all-cause mortality (adjusted OR: 1.55, 95% confidence interval (CI): 0.91-2.64, P = 0.105). Pre-specified subgroups showed an interaction between TR and left ventricular systolic function (Pinteraction  = 0.047). Indeed, moderate/severe TR was significantly related to mortality only in patients with left ventricular ejection fraction (LVEF) > 40% (adjusted OR: 2.01, CI: 1.05-3.84, P = 0.036). In patients with LVEF ≤ 40%, TR had no significant impact on all-cause mortality (adjusted OR: 1.04, CI: 0.34-3.16, P = 0.946). No significant interactions were identified regarding patients with perioperative moderate/severe mitral regurgitation (Pinteraction  = 0.829) and patients with baseline systolic pulmonary artery pressure ≥ 60 mm Hg (Pinteraction  = 0.669).

CONCLUSIONS

In patients undergoing TAVR, significant preoperative TR was present in 15% of patients and associated with more comorbidities. Despite being associated with a doubling of mortality rate, after a robust adjustment, significant TR was not an independent predictor of 2-year mortality. However, a significant interaction between TR and left ventricular systolic function was found. The response of TR to TAVR was extremely variable.

Short- and long-term outcomes of surgery for severe tricuspid regurgitation

INTRODUCTION AND OBJECTIVES

There is little data available for Spain on the outcomes of surgical treatment for severe tricuspid regurgitation. The aim of this study was to analyze clinical and echocardiographic outcomes in a series of patients who received surgical treatment for severe tricuspid regurgitation and to compare outcomes according to the operative approach to valve repair or replacement.

METHODS

Retrospective study in 119 consecutive patients with severe tricuspid regurgitation undergoing valve surgery between April 1996 and February 2010.

RESULTS

A total of 61 ringless and 23 ring annuloplasties were performed and 11 bioprostheses and 24 mechanical prostheses were implanted. Perioperative mortality was 18.5% and was associated with age and cardiopulmonary bypass time. During clinical follow-up (median, 41 [interquartile range, 24-89] months), 2 reoperations were required in the ring annuloplasty and mechanical prosthesis groups; prosthetic thrombosis was diagnosed in 4 patients in the latter group. Total mortality after follow-up was 29.9% and was associated with age>70 years and extracorporeal circulation time. The emergence of new severe tricuspid regurgitation was associated with age and ringless annuloplasty (P=.04).

CONCLUSIONS

Ringless repair was significantly associated with recurrence of severe tricuspid regurgitation. The use of mechanical prostheses was associated with a high rate of thrombosis. No significant differences in perioperative or total mortality were found between the different methods used for repair or valve replacement.

Direct injury to right coronary artery in patients undergoing tricuspid annuloplasty

BACKGROUND

Direct injury to the right coronary artery as a result of reparative operation on the tricuspid valve is a rare, probably underdiagnosed, but serious complication, which often involves dramatic clinical consequences. So far, only five cases have been described in the literature.

METHODS

We describe our single-center experience of this complication, and review and analyze relevant clinical and anatomic considerations related to this entity. Cases previously reported in the literature were also reviewed.

RESULTS

We describe four cases of direct injury to the right coronary artery in patients undergoing tricuspid annuloplasty (DeVega annuloplasty, 3; ring annuloplasty, 1) in our institution since 2005. All patients had right ventricular dilatation and severely dilated tricuspid annulus. Right coronary artery occlusion always occurred between the right marginal artery and the crux of the heart. Patients presented with hemodynamic or electrical instability. Coronary flow could be restored in 2 patients (percutaneously 1; surgically 1), both of whom finally survived, while it was not technically possible in the other 2 (1 died).

CONCLUSIONS

Occlusion of the right coronary artery in patients undergoing tricuspid annuloplasty is a rare complication that may occur if great annulus dilatation is present, thus altering both normal annular geometry and the relationship between the right coronary artery and the tricuspid annulus, particularly when DeVega annuloplasty is performed. Such an entity should be considered in the immediate postoperative period in an unstable patient, especially when complementary tests support this diagnosis. Prompt recognition and treatment can positively affect the patient's outcome, most often by means of an emergency revascularization strategy.