Long-term causes of death in patients with infective endocarditis who undergo medical therapy only or surgical treatment: a nationwide population-based study

Association Between Vegetation Size and Outcome in the Partial Oral Antibiotic Endocarditis Treatment Trial

Step-down oral antibiotic therapy is associated with a non-inferior long-term outcome compared with continued intravenous antibiotic therapy in the treatment of left-sided infective endocarditis. We aimed to analyze whether step-down oral therapy compared with continued intravenous antibiotic therapy is also associated with a non-inferior outcome in patients with large vegetations (vegetation length ≥ 10 mm) or among patients who underwent surgery before step-down oral therapy. We included patients without presence of aortic root abscess at diagnosis from the POET (Partial Oral Antibiotic Endocarditis Treatment) study. Multivariable Cox regression analyses were used to find associations between large vegetation, cardiac surgery, step-down oral therapy, and the primary end point (composite of all-cause mortality, unplanned cardiac surgery, embolic event, or relapse of positive blood cultures during follow-up). A total of 368 patients (age 68 ± 12, 77% men) were included. Patients with large vegetations (n = 124) were more likely to undergo surgery compared with patients with small vegetations (n = 244) (65% vs 20%, p <0.001). During a median 1,406 days of follow-up, 146 patients reached the primary end point. Large vegetations were not associated with the primary end point (hazard ratio 0.74, 95% confidence interval 0.47 to 1.18, p = 0.21). Step-down oral therapy was non-inferior to continued intravenous antibiotic in all subgroups when stratified by the presence of a large vegetation at baseline and early cardiac surgery. Step-down oral therapy is safe in the presence of a large vegetation at diagnosis and among patients who underwent early cardiac surgery.

Clinical Features and Patient Outcomes in Infective Endocarditis with Surgical Indication: A Single-Centre Experience

BACKGROUND

Infective endocarditis (IE) is marked by a heightened risk of embolic events (EEs), uncontrolled infection, or heart failure (HF).

METHODS

Patients with IE and surgical indication were enrolled from October 2015 to December 2018. The primary endpoint consisted of a composite of major adverse events (MAEs) including all-cause death, hospitalizations, and IE relapses. The secondary endpoint was all-cause death.

RESULTS

A total of 102 patients (66 ± 14 years) were enrolled: 50% with IE on prosthesis, 33% with IE-associated heart failure (IE-aHF), and 38.2% with EEs. IE-aHF and EEs were independently associated with MAEs (HR 1.9, 95% CI 1.1-3.4, p = 0.03 and HR 2.1, 95% CI 1.2-3.6, p = 0.01, respectively) and Kaplan-Meier survival curves confirmed a strong difference in MAE-free survival of patients with EEs and IE-aHF (p < 0.01 for both). IE-aHF (HR 4.3, 95% CI 1.4-13, p < 0.01), CRP at admission (HR 5.6, 95% CI 1.4-22.2, p = 0.01), LVEF (HR 0.9, 95% CI 0.9-1, p < 0.05), abscess (HR 3.5, 95% CI 1.2-10.6, p < 0.05), and prosthetic detachment (HR 4.6, 95% CI 1.5-14.1, p < 0.01) were independently associated with the all-cause death endpoint.

CONCLUSIONS

IE-aHF and EEs were independently associated with MAEs. IE-aHF was also independently associated with the secondary endpoint.

The Clinical Challenge of Prosthetic Valve Endocarditis: JACC Focus Seminar 3/4

During the past 6 decades, there have been numerous changes in prosthetic valve endocarditis (PVE), currently affecting an older population and increasing in incidence in patients with transcatheter-implanted valves. Significant microbiologic (molecular biology) and imaging diagnostic (fluorine-18 fluorodeoxyglucose-positron emission tomography/computed tomography) advances have been incorporated into the 2023 Duke-International Society for Cardiovascular Infectious Diseases infective endocarditis diagnostic criteria, thus increasing the diagnostic sensitivity for PVE without sacrificing specificity in validation studies. PVE is a life-threatening disease requiring management by multidisciplinary endocarditis teams in cardiac centers to improve outcomes. Novel surgical options are now available, and an increasing set of patients may avoid surgical intervention despite indication. Selected patients may complete parenteral or oral antimicrobial treatment at home. Finally, patients with prosthetic valves implanted surgically or by the transcatheter approach are candidates for antibiotic prophylaxis before invasive dental procedures.

Conservative Versus Surgical Therapy in Patients With Infective Endocarditis and Surgical Indication-Meta-Analysis of Reconstructed Time-to-Event Data

BACKGROUND

Infective endocarditis represents a life-threatening disease with high mortality rates. A fraction of patients receives exclusively conservative antibiotic treatment due to their comorbidities and high operative risk, despite fulfilling criteria for surgical therapy. The aim of the present study is to compare outcomes in patients with infective endocarditis and indication for surgical therapy in those who underwent or did not undergo valve surgery.

METHODS AND RESULTS

Three databases were systematically assessed. A pooled analysis of Kaplan-Meier-derived reconstructed time-to-event data from studies with longer follow-up comparing conservative and surgical treatment was performed. A landmark analysis to further elucidate the effect of surgical intervention on mortality was carried out. Four studies with 3003 patients and median follow-up time of 7.6 months were included. Overall, patients with an indication for surgery who were surgically treated had a significantly lower risk of mortality compared with patients who received conservative treatment (hazard ratio [HR], 0.27 [95% CI, 0.24-0.31], P<0.001). The survival analysis in the first year showed superior survival for patients who underwent surgery when compared with those who did not at 1 month (87.6% versus 57.6%; HR, 0.31 [95% CI, 0.26-0.37], P<0.01), at 6 months (74.7% versus 34.6%) and at 12 months (73.3% versus 32.7%).

CONCLUSIONS

Based on the findings of this study-level meta-analysis, patients with infective endocarditis and formal indication for surgical intervention who underwent surgery are associated with a lower risk of short- and long-term mortality when compared with conservative treatment.

Ultra-High-Resolution and K-Edge Imaging of Prosthetic Heart Valves With Spectral Photon-Counting CT: A Phantom Study

BACKGROUND AND PURPOSE

The contribution of cardiac computed tomography (CT) for the detection and characterization of prosthetic heart valve (PHV) complications is still limited due mainly to artifacts. Computed tomography systems equipped with photon-counting detectors (PCDs) have the potential to overcome these limitations. Therefore, the aim of the study was to compare image quality of PHV with PCD-CT and dual-energy dual-layer CT (DEDL-CT).

MATERIALS AND METHODS

Two metallic and 3 biological PHVs were placed in a tube containing diluted iodinated contrast inside a thoracic phantom and scanned repeatedly at different angles on a DEDL-CT and PCD-CT. Two small lesions (~2 mm thickness; containing muscle and fat, respectively) were attached to the structure of 4 valves, placed inside the thoracic phantom, with and without an extension ring, and scanned again. Acquisition parameters were matched for the 2 CT systems and used for all scans. Metallic valves were scanned again with parameters adapted for tungsten K-edge imaging. For all valves, different metallic parts were measured on conventional images to assess their thickness and blooming artifacts. In addition, 6 parallelepipeds per metallic valve were drawn, and all voxels with density <3 times the standard deviation of the contrast media were recorded as an estimate of streak artifacts. For subjective analysis, 3 expert readers assessed conventional images of the valves, with and without lesions, and tungsten K-edge images. Conspicuity and sharpness of the different parts of the valve, the lesions, metallic, and blooming artifacts were scored on a 4-point scale. Measurements and scores were compared with the paired t test or Wilcoxon test.

RESULTS

The objective analysis showed that, with PCD-CT, valvular metallic structures were thinner and presented less blooming artifacts. Metallic artifacts were also reduced with PCD-CT (11 [interquartile (IQ) = 6] vs 40 [IQ = 13] % of voxels). Subjective analysis allowed noticing that some structures were visible or clearly visible only with PCD-CT. In addition, PCD-CT yielded better scores for the conspicuity and for the sharpness of all structures (all Ps < 0.006), except for the conspicuity of the leaflets of the mechanical valves, which were well visible with either technique (4 [IQ = 3] for both). Both blooming and streak artifacts were reduced with PCD-CT (P ≤ 0.01). Overall, the use of PCD-CT resulted in better conspicuity and sharpness of the lesions compared with DEDL-CT (both Ps < 0.02). In addition, only with PCD-CT some differences between the 2 lesions were detectable. Adding the extension ring resulted in reduced conspicuity and sharpness with DEDL-CT (P = 0.04 and P = 0.02, respectively) and only in reduced sharpness with PCD-CT (P = 0.04). Tungsten K-edge imaging allowed for the visualization of the only dense structure containing it, the leaflets, and it resulted in images judged having less blooming and metallic artifacts as compared with conventional PCD-CT images (P < 0.01).

CONCLUSIONS

With PCD-CT, objective and subjective image quality of metallic and biological PHVs is improved compared with DEDL-CT. Notwithstanding the improvements in image quality, millimetric lesions attached to the structure of the valves remain a challenge for PCD-CT. Tungsten K-edge imaging allows for even further reduction of artifacts.

NatIonal Danish endocarditis stUdieS - Design and objectives of the NIDUS registry

AIMS

The NatIonal Danish endocarditis stUdieS (NIDUS) registry aims to investigate the mechanisms contributing to the increasing incidence of infective endocarditis (IE) and to discover risk factors associated to the course, treatment and clinical outcomes of the disease.

METHODS

The NIDUS registry was created to investigate a nationwide unselected group of patients hospitalized for IE. The National Danish healthcare registries have been queried for validated IE diagnosis codes (International Classification of Disease, 10th edition [ICD-10]: DI33, DI38, and DI398). Subsequently, a team of 28 healthcare professionals, including experts in endocarditis, will systematically review and evaluate all identified patient records using the modified Duke Criteria and the 2015 European Society of Cardiology modified diagnostic criteria. The registry will contain all cases with definite or possible IE found in primary data sources in Denmark between January 1, 2016, and December 31, 2021. We will gather individual patient data, such as clinical, microbiological, and echocardiographic characteristics, treatment regimens, and clinical outcomes. A digital data collection form will be used to the gathering of data. A sample of approximately 4,300 individual patients will be evaluated using primary data sources.

CONCLUSIONS AND PERSPECTIVES

The NIDUS registry will be the first comprehensive nationwide IE registry, contributing critical knowledge about the course, treatment, and clinical outcomes of the disease. Additionally, it will significantly aid in identifying areas in which future research is needed.

Clinical implementation of partial oral treatment in infective endocarditis: the Danish POETry study

BACKGROUND AND AIMS

In the Partial Oral Treatment of Endocarditis (POET) trial, stabilized patients with left-sided infective endocarditis (IE) were randomized to oral step-down antibiotic therapy (PO) or conventional continued intravenous antibiotic treatment (IV), showing non-inferiority after 6 months. In this study, the first guideline-driven clinical implementation of the oral step-down POET regimen was examined.

METHODS

Patients with IE, caused by Staphylococcus aureus, Enterococcus faecalis, Streptococcus spp. or coagulase-negative staphylococci diagnosed between May 2019 and December 2020 were possible candidates for initiation of oral step-down antibiotic therapy, at the discretion of the treating physician. The composite primary outcome in patients finalizing antibiotic treatment consisted of embolic events, unplanned cardiac surgery, relapse of bacteraemia and all-cause mortality within 6 months.

RESULTS

A total of 562 patients [median age 74 years (IQR, interquartile range, 65-80), 70% males] with IE were possible candidates; PO was given to 240 (43%) patients and IV to 322 (57%) patients. More patients in the IV group had IE caused by S. aureus, or had an intra-cardiac abscess, or a pacemaker and more were surgically treated. The primary outcome occurred in 30 (13%) patients in the PO group and in 59 (18%) patients in the IV group (P = .051); in the PO group, 20 (8%) patients died vs. 46 (14%) patients in the IV group (P = .024). PO-treated patients had a shorter median length of stay [PO 24 days (IQR 17-36) vs. IV 43 days (IQR 32-51), P < .001].

CONCLUSIONS

After clinical implementation of the POET regimen almost half of the possible candidates with IE received oral step-down antibiotic therapy. Patients in the IV group had more serious risk factors for negative outcomes. At 6-month follow-up, there was a numerically but not statistically significant difference towards a lower incidence of the primary outcome, a lower incidence of all-cause mortality and a reduced length of stay in the PO group. Due to the observational design of the study, the lower mortality may to some extent reflect selection bias and unmeasured confounding. Clinical implementation of PO regimens seemed feasible and safe.

Infective Endocarditis Antibiotic Prophylaxis: Review of the Evidence and Guidelines

PURPOSE OF REVIEW

The question of antibiotic prophylaxis and its role in prevention of infective endocarditis (IE) remains controversial, with differing recommendations from international societies. The aim of this review was to compare and contrast current recommendations on antibiotic prophylaxis for IE by the American Heart Association (AHA), the European Society of Cardiology (ESC), and the National Institute for Health and Care Excellence (NICE) and highlight the evidence supporting these recommendations.

RECENT FINDINGS

International guidelines for administration of antibiotic prophylaxis for prevention of IE are largely unchanged since 2009. Studies on the impact of the more restrictive antibiotic prophylaxis recommendations are conflicting, with several studies suggesting lack of adherence to current guidance from the ESC (2015), NICE (2016), and AHA (2021). The question of antibiotic prophylaxis in patients with IE remains controversial, with differing recommendations from international societies. Despite the change in guidelines more than 15 years ago, lack of adherence to current guidelines persists. Due to the lack of high-quality evidence and the conflicting results from observational studies along with the lack of randomized clinical trials, the question of whether to recommend antibiotic prophylaxis or not in certain patient populations remains unanswered and remains largely based on expert consensus opinion.

Recurrence of bacteremia and infective endocarditis according to bacterial species of index endocarditis episode

PURPOSE

In patients surviving infective endocarditis (IE) recurrence of bacteremia or IE is feared. However, knowledge is sparse on the incidence and risk factors for the recurrence of bacteremia or IE.

METHODS

Using Danish nationwide registries (2010-2020), we identified patients with first-time IE which were categorized by bacterial species (Staphylococcus aureus, Enterococcus spp., Streptococcus spp., coagulase-negative staphylococci [CoNS], 'Other' microbiological etiology). Recurrence of bacteremia (including IE episodes) or IE with the same bacterial species was estimated at 12 months and 5 years, considering death as a competing risk. Cox regression models were used to compute adjusted hazard ratios of the recurrence of bacteremia or IE.

RESULTS

We identified 4086 patients with IE; 1374 (33.6%) with S. aureus, 813 (19.9%) with Enterococcus spp., 1366 (33.4%) with Streptococcus spp., 284 (7.0%) with CoNS, and 249 (6.1%) with 'Other'. The overall 12-month incidence of recurrent bacteremia with the same bacterial species was 4.8% and 2.6% with an accompanying IE diagnosis, while this was 7.7% and 4.0%, respectively, with 5 years of follow-up. S. aureus, Enterococcus spp., CoNS, chronic renal failure, and liver disease were associated with an increased rate of recurrent bacteremia or IE with the same bacterial species.

CONCLUSION

Recurrent bacteremia with the same bacterial species within 12 months, occurred in almost 5% and 2.6% for recurrent IE. S. aureus, Enterococcus spp., and CoNS were associated with recurrent infections with the same bacterial species.

Microbiological Etiology in Patients with IE Undergoing Surgery and for Patients with Medical Treatment Only: A Nationwide Study from 2010 to 2020

Microbiological etiology has been associated with surgery for infective endocarditis (IE) during admission, especially Staphylococcus aureus. We aimed to compare patient characteristics, microbiological characteristics, and outcomes by treatment choice (surgery or not). We identified patients with first-time IE between 2010 and 2020 and examined the microbiological etiology of IE according to treatment choice. To identify factors associated with surgery during initial admission, we used the Aalen-Johansen estimator and an adjusted cause-specific Cox model. One-year mortality stratified by microbiological etiology and treatment choice was assessed using unadjusted Kaplan-Meier estimates and an adjusted Cox proportional hazard model. A total of 6255 patients were included, of which 1276 (20.4%) underwent surgery during admission. Patients who underwent surgery were younger (65 vs. 74 years) and less frequently had cerebrovascular disease, cardiovascular disease, diabetes, and chronic kidney disease. Patients with Staphylococcus aureus IE were less likely to undergo surgery during admission (13.6%) compared to all other microbiological etiologies. One-year mortality according to microbiological etiology in patients who underwent surgery was 7.0%, 5.3%, 5.5%, 9.6%, 13.2, and 11.2% compared with 24.2%, 19.1%, 27,6%, 25.2%, 21%, and 16.9% in patients who received medical therapy for Staphylococcus aureus, Streptococcus spp., Enterococcus spp., coagulase-negative Staphylococci, "other microbiological etiologies", and blood culture-negative infective endocarditis, respectively. Patients with IE who underwent surgery differed in terms of microbiology, more often having Streptococci than those who received medical therapy. Contrary to expectations, Staphylococcus aureus was more common among patients who received medical therapy only.

The hidden side of infective endocarditis: Diagnostic and management of 500 consecutive cases in noncardiac surgery centers (2009-2018)

BACKGROUND

We aimed to describe infective endocarditis cases from noncardiac surgery centers, as current knowledge on infective endocarditis is derived mostly from cardiac surgery hospitals.

METHODS

An observational retrospective study (2009-2018) was conducted in 9 noncardiac surgery hospitals in Central Catalonia. All adult patients diagnosed with definitive infective endocarditis were included. Transferred and nontransferred cohorts were compared, and a logistic regression model was used to ascertain the prognostic factors.

RESULTS

Overall, 502 infective endocarditis episodes were included: 183 (36.5%) were transferred to the cardiac surgery center, whereas 319 were not, with (18.7%) and without (45%) surgical indications. Cardiac surgery was performed in 83% of transferred patients. In-hospital (14% vs 23%) and 1-year (20% vs 35%) mortality rates were significantly lower in transferred patients (P < .001). Among the patients not undergoing cardiac surgery despite an indication, 55 (54%) died within 1 year. The multivariate analysis identified the following independent predictive factors for in-hospital mortality: Staphylococcus aureus infective endocarditis (odds ratio: 1.93 [1.08, 3.47]), heart failure (odds ratio: 3.87 [2.28, 6.57]), central nervous system embolism (odds ratio: 2.95 [1.41, 5.14]), and Charlson score (odds ratio: 1.19 [1.09, 1.30]), whereas community acquisition (odds ratio: 0.52 [0.29, 0.93]), cardiac surgery (odds ratio: 0.42 [0.20, 0.87]), but not transfer (odds ratio: 1.23 [0.84, 3.95]) were identified as protective factors. One-year mortality was associated with S. aureus infective endocarditis (odds ratio: 1.82 [1.04, 3.18]), heart failure (odds ratio: 3.74 [2.27, 6.16]), and Charlson score (odds ratio: 1.23 [1.13, 1.33]), whereas cardiac surgery (odds ratio: 0.41 [0.21, 0.79]) was identified as a protective factor.

CONCLUSION

Patients not transferred to a referral cardiac surgery center have a worse prognosis compared to those ultimately transferred, as cardiac surgery is associated with lower mortality rates.

Streptococcal infective endocarditis: clinical features and outcomes according to species

PURPOSE

Infective endocarditis (IE) is frequently caused by streptococcal species, yet clinical features and mortality are poorly investigated. Our aim was to examine patients with streptococcal IE to describe clinical features and outcomes according to streptococcal species.

METHODS

From 2002 to 2012, we investigated patients with IE admitted to two tertiary Danish heart centres. Adult patients with left-sided streptococcal IE were included. Adjusted multivariable logistic regression analyses were performed, to assess the association between streptococcal species and heart valve surgery or 1-year mortality.

RESULTS

Among 915 patients with IE, 284 (31%) patients with streptococcal IE were included [mean age 63.5 years (SD 14.1), 69% men]. The most frequent species were S. mitis/oralis (21%) and S. gallolyticus (17%). Fever (86%) and heart murmur (81%) were common symptoms, while dyspnoea was observed in 46%. Further, 18% of all cases were complicated by a cardiac abscess/pseudoaneurysm and 25% by an embolic event. Heart valve surgery during admission was performed in 55% of all patients, and S. gallolyticus (OR 0.28 [95% CI 0.11-0.69]) was associated with less surgery compared with S. mitis/oralis. In-hospital mortality was 7% and 1-year mortality 15%, without any difference between species.

CONCLUSION

S. mitis/oralis and S. gallolyticus were the most frequent streptococcal species causing IE. Further, S. gallolyticus IE was associated with less heart valve surgery during admission compared with S. mitis/oralis IE. Being aware of specific symptoms, clinical findings, and complications related to different streptococcal species, may help the clinicians in expecting different outcomes.

European survey on valvular heart disease clinical experience from the European Society of Cardiology council on valvular heart disease

Aims

The aim of this survey is to analyze how current recommendations on valvular heart disease (VHD) management have been adopted. Identifying potential discrepancies between recommendations and everyday clinical practice would enable us to better understand and address the remaining challenges in this controversial and complex field.

Methods and results

A total of 33 questions, distributed via email to all European Society of Cardiology (ESC) affiliated countries through the newsletter of the ESC council on VHD, were answered by 689 respondents, mainly from tertiary care settings. The results of this survey showed that VHD patients are mostly managed by tertiary care centres, where multi-disciplinary heart teams are frequently a reality. Cardiac computed tomography (CT) is often used in the preprocedural planning of transcatheter interventions, particularly for sizing and deliverability assessment. Echocardiography represents the most widely used imaging modality in the diagnostic, intra-operative and follow-up phase of VHD patients. Cardiac magnetic resonance (CMR) is still largely underused, also for conditions such as mitral annular disjunction, or for the assessment of left ventricle volumes where it is considered as the gold standard, despite 3D volumes by echocardiography having proved good comparability with CMR. As for endocarditis, despite still underused, transesophageal echocardiography (TEE) represents the approach of choice for the diagnosis of native and prosthesis valve endocarditis (up to 46% of the respondents use it). In this context, positron emission tomography-CT is largely underused.

Conclusion

There is widespread adoption of current recommendation on the evaluation of VHD and these are frequently used to guide patient management. Nonetheless, there are still many discrepancies across centres and countries which need to be addressed with the aim of improving patients' management and outcomes and ultimately positively impacting on healthcare resources.

The clinical pattern differentiates ANCA-positive infective endocarditis patients from ANCA-associated vasculitis patients: a 23 years' retrospective cohort study in China and follow-ups

Objectives

Patients with infective endocarditis (IE) may present rheumatic manifestations concurrent with various autoantibodies and thus mimic antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). This study aims to characterize the specific features in a long-term cohort of ANCA-positive IE patients and to perform comparative analysis with primary AAV patients.

Methods

We performed a retrospective thorough review of 475 consecutive IE patients over 23 years, identifying 22 patients positive for proteinase 3 and/or myeloperoxidase and 36 treatment-naïve AAV patients. The clinical, laboratory, and follow-up data were collected to perform comparative analysis.

Results

Our study illustrated that ANCA-positive IE patients were younger and had a shorter duration than AAV patients. Pulmonary lesions, ENT signs, peripheral neuropath, and proteinuria were more commonly seen in AAV patients, while heart valve involvement, spleen enlargement, and cerebral hemorrhage were more typical for IE patients (all p < 0.05). Besides, ANCA-positive IE patients presented a higher level of PR3-ANCA but lower C3 (both p < 0.05). Hyperleukocytosis and thrombocytopenia were more frequently found in AAV patients (both p < 0.05). No significant difference was noticed in the survival rate.

Conclusions

Our study urges the early differential diagnosis of IE in ANCA-positive patients. It supports the claim that ANCA-positive IE patients and AAV patients do not share the same clinical spectrum. Echocardiography, serological profiles, and evaluation of multi-organ involvement might be required to improve diagnostic accuracy.

Key Points •Early differential diagnosis of ANCA-positive IE from AAV is challenging even for expert rheumatologists. •Our study is so far one of the largest to include 22 ANCA-positive IE patients in one single center and spanning over 23 years. It is also the first study to include both ANCA-positive IE patients and AAV patients in one center. •Our study aides to identify a clinical picture to differentiate ANCA-Positive IE Patients from AAV Patients.

Supplementary Information

The online version contains supplementary material available at 10.1007/s10067-022-06313-w.

Predictors of long-term mortality in left-sided infective endocarditis: an historical cohort study in 414 patients

INTRODUCTION

Very limited data are available on the long-term outcome of infective endocarditis (IE) and its determinants. The aim of this study was to identify the predictors of long-term mortality in patients affected by left sided IE (LSIE).

METHODS

This was an historical retrospective observational study on prospectively collected data from patients with LSIE hospitalized in our Unit (January 2000-December 2017). Multiple variables relevant to history, physical examination, laboratory tests, echocardiography, comorbidities, complications and outcome were analysed by Cox regression to identify predictors of long-term mortality.

RESULTS

414 patients were included, and followed up for a median of 39 months [IQR 11-74]. Median age was 59 years [range 3-89], and most patients were male. Over 50% showed at least one comorbidity. Hyperglycaemia, increased creatinine and an indication for surgery predicted in-hospital mortality, while a prior myocardial infarction, chronic kidney disease (CKD) on hemodialysis and a larger vegetation were independent predictors of 1-year mortality. At multivariate analysis, peripheral arterial disease (p= 0.017), hyperglycemia on admission (p=0.013) and a higher BMI (p=0.009) were independent predictors of long-term mortality in 1-year survivors. At multivariable Cox proportional hazard regression, peripheral arterial disease (p=0.002), hyperglycemia (p=0.041) and CKD on hemodialysis (p=0.025) confirmed to be independently associated with an increased risk of long-term mortality in the overall 414 patient cohort.

CONCLUSIONS

Cardiovascular and metabolic risk signals, specifically peripheral arterial disease and hyperglicemia, affect long-term mortality of LSIE. An active and long-term follow up seems warranted in IE survivors showing these conditions at outset.

Infective endocarditis and outcomes of mitral valve replacement

BACKGROUND

We investigated the long-term outcomes of mitral valve replacement (MVR) in native mitral valve infective endocarditis (IE).

METHODS

Multicentre, population-based cohort register study consisted of 1233 consecutive adult patients treated with first-time MVR in Finland. Mitral valve IE was diagnosed in 170 of these patients. Propensity score matching resulted in 134 pairs with balanced baseline characteristics. The median follow-up was 6.1 years.

RESULTS

Pre-operative native mitral valve IE was associated with an increased hazard of 10-year mortality (38.8% vs 30.5%; HR 2.13; CI 1.17-3.85; P = .013) after MVR. Occurrence of major bleeding was higher in IE patients (26.0%) vs non-IE patients (23.4%) during the 10-year follow-up (HR 2.80; CI 1.01-7.77; P = .048). Hospital admission duration after MVR was longer in IE patients (median 28 vs 11 days; P < .0001). Cumulative ischaemic stroke rate was similar between patient groups (12.1% in IE vs 15.1% in non-IE; P = .493). Re-sternotomy was performed in 13.4% of IE patients and 9.0% of non-IE patients (P = .261).

CONCLUSIONS

Patients with native mitral valve IE have a higher risk of death and major bleeding after MVR than matched patients without IE. Results highlight the importance of complication prevention in these patients.

Surgical aortic valve replacement and infective endocarditis

BACKGROUND

We wanted to investigate the influence of native-valve infective endocarditis (IE) on long-term outcomes of surgical aortic valve replacement (SAVR).

METHODS

Native-valve patients with IE (n = 191) were compared to propensity score-matched patients without IE (n = 191), all treated with SAVR, in a multicentre, population-based cohort register study in Finland. The median follow-up was 6.2 years.

RESULTS

Infective endocarditis as the indication for SAVR was associated with an increased hazard of 10-year mortality (37.1% vs 24.2%; HR 1.83; CI 1.03-3.26; P = .039). Ischaemic stroke was also more frequent in IE patients during 10-year follow-up (15.8% vs 7.5%; HR 3.80; CI 1.42-10.18; P = .008). Major bleeding within first year after SAVR was more frequent in patients with IE (7.0% vs 2.9%; P = .038). Ten-year major bleeding rate was 32.4% in IE vs 24.5% in non-IE groups (P = .174). Aortic valve re-operation rate was 4.3% in IE vs 8.4% in non-IE groups (P = .975). Admission duration after SAVR was longer in IE (median 29 vs 9 days; P < .0001). There was no difference in 30-day mortality after SAVR.

CONCLUSIONS

Patients with native-valve IE have a higher risk of death, ischaemic stroke, and early major bleeding after SAVR than matched patients without IE. Results confirm the high risk for complications of IE patients after SAVR and highlight the importance of vigorous prevention of both stroke and bleeding after SAVR in these patients.

Long-term antibiotic therapy in patients with surgery-indicated not undergoing surgery infective endocarditis

BACKGROUND

To date, there is little information regarding management of patients with infective endocarditis (IE) that did not undergo an indicated surgery. Therefore, we aimed to evaluate prognosis of these patients treated with a long-term antibiotic treatment strategy, including oral long term suppressive antibiotic treatment in five referral centres with a multidisciplinary endocarditis team.

METHODS

This retrospective, multicenter study retrieved individual patient-level data from five referral centres in Spain. Among a total of 1797, 32 consecutive patients with IE were examined (median age 72 years; 78% males) who had not undergone an indicated surgery, but received long-term antibiotic treatment (LTAT) and were followed by a multidisciplinary endocarditis team, between 2011 and 2019. Primary outcomes were infection relapse and mortality during follow-up.

RESULTS

Among 32 patients, 21 had IE associated with prostheses. Of the latter, 8 had an ascending aorta prosthetic graft. In 24 patients, a switch to long-term oral suppressive antibiotic treatment (LOSAT) was considered. The median duration of LOSAT was 277 days. Four patients experienced a relapse during follow-up. One patient died within 60 days, and 12 patients died between 60 days and 3 years. However, only 4 deaths were related to IE.

CONCLUSIONS

The present study results suggest that a LTAT strategy, including LOSAT, might be considered for patients with IE that cannot undergo an indicated surgery. After hospitalization, they should be followed by a multidisciplinary endocarditis team.

Can prosthesis type influence the recurrence of infective endocarditis after surgery for native valve endocarditis? A propensity weighted comparison

OBJECTIVES

Our goal was to investigate whether the incidence of valve-related adverse events might be different depending on the valve substitute after valve replacement for left-sided native valve endocarditis.

METHODS

We assessed the long-term freedom from recurrence, reoperation and survival of 395 patients who had valve replacements for native valve endocarditis (314 mechanical vs 81 biological). Age <18 years, reoperation, prosthetic endocarditis, right valve involvement, valve repair and homograft implants were the main exclusion criteria. The balance between the 2 groups was addressed by weighting the results on the inverse of the propensity score.

RESULTS

After inverse probability of treatment weighting (IPTW), freedom from recurrence of infective endocarditis was not significantly different (mechanical 84.1 ± 3.2% vs 50.6 ± 21.7%; P = 0.29) nor was freedom from reoperation different (mechanical 85.7 ± 3.1% vs biological 50.9 ± 21.9%; P = 0.29). Excluding competing deaths, patients receiving a bioprosthesis had a similar subdistribution hazard of the above end points compared to recipients of a mechanical valve [recurrence IPTW: hazard ratio (HR) 1.631, 95% confidence interval (CI) 0.756-3.516; P = 0.21; reoperation IPTW-HR 1.737, 95% CI 0.780-3.870; P = 0.18]. Mechanical valves were associated with improved long-term survival (34.9 ± 5.8% vs 10.5 ± 7.4% at 30 years; P = 0.0009; in particular: aortic valve subgroup 41.6 ± 9.3% vs 10.1 ± 8.2%; P < 0.0001), although the hazard of cardiovascular mortality did not favour either valve type (IPTW: HR 1.361, 95% CI 0.771-2.404; P = 0.29).

CONCLUSIONS

Our analysis showed a clinical trend in favour of mechanical valves as valve substitutes for native valve endocarditis, especially in the aortic position. In view of long-term freedom from adverse events, the choice of the valve type should be tailored according to patient characteristics and specific clinical conditions.

Evolution of epidemiological characteristics of infective endocarditis in Greece

OBJECTIVE

The clinical profile, management and outcome of infective endocarditis (IE) may be influenced by socioeconomic issues.

METHODS

A nationwide prospective study evaluated IE during the era of deep economic crisis in Greece. Epidemiological data and factors associated with 60-day mortality were analyzed through descriptive statistics, logistic and Cox-regression models.

RESULTS

Among 224 patients (male 72.3%, mean age 62.4 years), Staphylococcus aureus (n = 62; methicillin-resistant S. aureus (MRSA) 33.8%) predominated in the young without impact on mortality (p = 0.593), whilst Enterococci (n = 36) predominated in the elderly. Complications of IE were associated with mortality: heart failure [OR 2.415 (95% CI: 1.159-5.029), p = 0.019], stroke [OR 3.206 (95% CI: 1.190-8.632), p = 0.018] and acute kidney injury [OR 2.283 (95% CI: 1.085-4.805), p = 0.029]. A 60-day survival benefit was solely related to cardiac surgery for IE during hospitalization [HR 0.386 (95% CI: 0.165-0.903), p = 0.028] and compliance with antimicrobial treatment guidelines [HR 0.487 (95% CI: 0.259-0.916), p = 0.026]. Compared with a previous country cohort study, history of rheumatic fever and native valve predisposition had declined, whilst underlying renal disease and right-sided IE had increased (p < 0.0001); HIV infection had emerged (p = 0.002). No difference in rates of surgery and outcome was assessed.

CONCLUSIONS

A country-wide survey of IE highlighted emergence of HIV, right-sided IE and predominance of MRSA in the youth during a severe socioeconomic crisis. Compliance with treatment guidelines promoted survival.

Prevalence of infective endocarditis in patients with positive blood cultures: a Danish nationwide study

AIMS

Increasing attention has been given to the risk of infective endocarditis (IE) in patients with certain blood stream infections (BSIs). Previous studies have been conducted on selected patient cohorts, yet unselected data are sparse. We aimed to investigate the prevalence of IE in BSIs with bacteria typically associated with IE.

METHODS AND RESULTS

By crosslinking nationwide registries from 2010 to 2017, we identified patients with BSIs typically associated with IE: Enterococcus faecalis (E. faecalis), Staphylococcus aureus (S. aureus), Streptococcus spp., and coagulase negative staphylococci (CoNS) and examined the concurrent IE prevalence. A trend test was used to examine temporal changes in the prevalence of IE. In total 69 021, distributed with 15 350, 16 726, 19 251, and 17 694 BSIs were identified in the periods of 2010-2011, 2012-2013, 2014-2015, and 2016-2017, respectively. Patients with E. faecalis had the highest prevalence of IE (16.7%) followed by S. aureus (10.1%), Streptococcus spp. (7.3%), and CoNS (1.6%). Throughout the study period, the prevalence of IE among patients with E. faecalis and Streptococcus spp. increased significantly (P = 0.0005 and P = 0.03, respectively). Male patients had a higher prevalence of IE for E. faecalis, Streptococcus spp., and CoNS compared with females. A significant increase in the prevalence of IE was seen for E. faecalis, Streptococcus spp., and CoNS with increasing age.

CONCLUSION

For E. faecalis BSI, 1 in 6 had IE, for S. aureus BSI 1 in 10 had IE, and for Streptococcus spp. 1 in 14 had IE. Our results suggest that screening for IE seems reasonable in patients with E. faecalis BSI, S. aureus BSI, or Streptococcus spp. BSI.

Risk of reoperative valve surgery for endocarditis associated with drug use

BACKGROUND

We aimed to quantify incidence and operative risks associated with reoperative valve surgeries (RVS) in patients with drug-associated infective endocarditis in a multi-center setting.

METHODS

We formed a registry of patients with drug-associated infective endocarditis who underwent valve surgeries at 8 US centers between 2011 and 2017. Outcomes of first-time valve surgery (FVS) and RVS were compared. Multivariable logistic regression models related RVS to 30-day mortality. Poisson regression models were fitted to evaluate temporal trends in overall case volume and proportions of patients undergoing RVS.

RESULTS

The cohort consisted of 925 patients with drug-associated infective endocarditis who underwent a valve surgery, of which 652 were FVS and 273 were RVS. Patients undergoing FVS had fewer comorbidities than those undergoing RVS. Overall case volume increased from 108 in 2012 to 229 cases in 2017 (P < .001). The proportion of redo valve cases increased from 19% in 2012 to 28% in 2017 (P < .001). The 30-day mortality in RVS was higher compared with FVS (8.1% vs 4.8%; P = .049). An increase in unadjusted mortality rates were observed as the number of prior cardiac surgeries increased, from 4.8% in FVS to 11.8% in ≥3 RVS. Multivariable model demonstrated that RVS was associated with an increased risk of 30-day mortality (odds ratio, 2.22; 95% confidence interval, 1.22-4.06; P = .010).

CONCLUSIONS

An increasing proportion of valve surgery for drug-associated infective endocarditis is for RVS. Despite being young and harboring few comorbidities, the RVS cohort is still susceptible to increased risk of 30-day mortality compared with those undergoing FVS.

Trends in Infective Endocarditis Hospitalizations, Characteristics, and Valve Operations in Patients With Opioid Use Disorders in the United States: 2005-2014

Background To evaluate changes in patient characteristics and outcomes for infective endocarditis (IE) related to opioid use disorder (OUD), we used the National (Nationwide) Inpatient Sample (NIS) to characterize the trend in hospitalizations for patients with IE with and without OUD and those treated medically and surgically. Methods and Results Temporal trends in hospitalization characteristics for patients with IE with and without OUD and those treated medically and surgically were estimated via the NIS data in 2005-2014. Hospitalizations for OUD and IE increased from 119 to 202 and from 12 to 15 cases per 100 000 between 2005 and 2014, respectively. Hospitalizations with OUD among all IE hospitalizations increased from 6.3% in 2005 to 11.6% in 2014. Among all IE hospitalizations, patients being admitted for IE in the setting of OUD were younger compared with the cohort of IE without OUD (aged 37.6±0.21 years versus 60.9±0.16 years). Myocardial infarction, diabetes mellitus, chronic kidney disease, peripheral vascular disease, and heart failure were more common in patients without OUD. The OUD cohort more frequently had liver disease (46.0% versus 10.8%) and immunosuppressed status (4.3% versus 2.1%). Valve operations for IE accounted for 10.2% of all valve operations in 2005, and this increased to 12.7% in 2014. These proportions were similar between OUD (11.4%) and non-OUD (11.1%) cohorts. Operative mortality was lower in patients with OUD (4.3% versus 9.4%, P<0.001). Conclusions IE associated with OUD has a distinct phenotype and has become more prevalent. Surgical outcomes are favorable and operations were performed in similar proportions of patients who had IE with OUD compared with patients who had IE without OUD.

Infective endocarditis: innovations in the management of an old disease

The annual incidence of infective endocarditis (IE) is estimated to be between 15 and 80 cases per million persons in population-based studies. The incidence of IE is markedly increased in patients with valve prostheses (>4 per 1,000) or with prior IE (>10 per 1,000). The interaction between platelets, microorganisms and diseased valvular endothelium is the cause of vegetations and valvular or perivalvular tissue destruction. Owing to its complexity, the diagnosis of IE is facilitated by the use of the standardized Duke-Li classification, which combines two major criteria (microbiology and imaging) with five minor criteria. However, the sensitivity of the Duke-Li classification is suboptimal, particularly in prosthetic IE, and can be improved by the use of PET or radiolabelled leukocyte scintigraphy. Prolonged antibiotic therapy is mandatory. Indications for surgery during acute IE depend on the presence of haemodynamic, septic and embolic complications. The most urgent indications for surgery are related to heart failure. In the past decade, the prevention of IE has been reoriented, with indications for antibiotic prophylaxis now limited to patients at high risk of IE undergoing dental procedures. Guidelines now emphasize the importance of nonspecific oral and cutaneous hygiene in individual patients and during health-care procedures.

Valve regurgitation in patients surviving endocarditis and the subsequent risk of heart failure

BACKGROUND

Significant valve regurgitation is common in patients surviving native valve infective endocarditis (IE), however the associated risk of heart failure (HF) subsequent to hospital discharge after IE is sparsely described.

METHODS

We linked data from the East Danish Endocarditis Registry with administrative registries from 2002 to 2016 and included patients treated medically for IE who were discharged alive. Left-sided valve regurgitation was assessed by echocardiography at IE discharge and examined for longitudinal risk of HF. Multivariable adjusted Cox analysis was used to assess the associated risk of HF in patients with regurgitation (moderate or severe) compared with patients without regurgitation.

RESULTS

We included 192 patients, 87 patients with regurgitation at discharge (30 with aortic regurgitation and 57 with mitral regurgitation) and 105 patients without. The cumulative risk of HF at 5 years of follow-up was 28.7% in patients with regurgitation at IE discharge and 12.4% in patients without regurgitation; the corresponding multivariable adjusted HR was 3.53 (95% CI 1.72 to 7.25). We identified an increased associated risk of HF for patients with aortic regurgitation (HR=2.91, 95% CI 1.14 to 7.43) and mitral regurgitation (HR=3.95, 95% CI 1.80 to 8.67) compared with patients without regurgitation. During follow-up, 21.9% and 5.7% underwent left-sided valve surgery among patients with and without regurgitation.

CONCLUSION

In patients surviving IE, treated medically, we observed that severe or moderate left-sided native valve regurgitation was associated with a significantly higher risk of HF compared with patients without regurgitation at IE discharge. Close monitoring of these patients is needed to initiate surgery timely.

Short- and long-term mortality in patients with left-sided infective endocarditis not undergoing surgery despite indication

INTRODUCTION AND OBJECTIVES

In infective endocarditis (IE), decisions on surgical interventions are challenging and a high percentage of patients with surgical indication do not undergo these procedures. This study aimed to evaluate the short- and long-term prognosis of patients with surgical indication, comparing those who underwent surgery with those who did not.

METHODS

We included 271 patients with left-sided IE treated at our institution from 2003 to 2018 and with an indication for surgery. There were 83 (31%) surgery-indicated not undergoing surgery patients with left-sided infective endocarditis (SINUS-LSIE). The primary outcome was all-cause death by day 60 and the secondary outcome was all-cause death from day 61 to 3 years of follow-up. Multivariable Cox regression and propensity score matching were used for the analysis.

RESULTS

At the 60-day follow-up, 40 (21.3%) surgically-treated patients and 53 (63.9%) SINUS-LSIE patients died (P <.001). Risk of 60-day mortality was higher in SINUS-LSIE patients (HR, 3.59; 95%CI, 2.16-5.96; P <.001). Other independent predictors of the primary endpoint were unknown etiology, heart failure, atrioventricular block, and shock. From day 61 to the 3-year follow-up, there were no significant differences in the risk of death between surgically-treated and SINUS-LSIE patients (HR, 1.89; 95%CI, 0.68-5.19; P=.220). Results were consistent after propensity score matching. Independent variables associated with the secondary endpoint were previous IE, diabetes mellitus, and Charlson index.

CONCLUSIONS

Two-thirds of SINUS-LSIE patients died within 60 days. Among survivors, the long-term mortality depends more on host conditions than on the treatment received during admission.

Incidence, characteristics, and mortality of infective endocarditis in France in 2011

Objectives

We assessed the determinants of mortality in infective endocarditis (IE), using the national hospital discharge databases (HDD) in 2011.

Methods

IE stays were extracted from the national HDD, with a definition based on IE-related diagnosis codes. This definition has been assessed according to Duke criteria by checking a sample of medical charts of IE giving a predictive positive value of 86.1% (95% confidence interval (CI): 82.7% - 89.5%). The impact of heart valve surgery on survival has been studied if performed during the initial stay, and over the year of follow-up. Risk factors of in-hospital mortality were identified using logistic regression model for the initial stay and Cox Time-dependent model for the 1-year mortality.

Results

The analysis included 6,235 patients. The annual incidence of definite IEs was 63 cases/million residents. Staphylococci and Streptococci were the most common bacteria (44% and 45%, respectively). A valvular surgery was performed in 20% of cases, but substantial variations existed between hospitals. The in-hospital mortality was 21% (ranging 12% to 27% according to the region of patients), associated with age>70, chronic liver disease, renal failure, S. aureus, P. aeruginosa or candida infection and strokes whereas valvular surgery, a native valve IE or intraveinous drug use (right heart IE) were significantly protective for an initial death. The same factors were associated with the one-year mortality, except for valvular surgery which was associated with a 1.4-fold higher risk of death during the year post IE.

Conclusion

We reported a high IE incidence rate. Valvular surgery was considerably less frequent in this study than in the previous published data (near 50%) whereas mortality was similar. Surgery was associated with higher survival if undergone within the initial stay. There were significant regional differences in frequency of surgery but it did not impact mortality.