Quantifying infective endocarditis risk in patients with predisposing cardiac conditions

The 2023 new European guidelines on infective endocarditis: main novelties and implications for clinical practice

The 2023 European Society of Cardiology (ESC) guidelines for the management of infective endocarditis update the previous 2015 guidelines with main novelties in five areas: (1) antibiotic prevention for high-risk patients, and prevention measures for intermediate-risk and high-risk patients; (2) diagnosis with emphasis on multimodality imaging to assess cardiac lesions of infective endocarditis' (3) antibiotic therapy allowing an outpatient antibiotic treatment for stabilized, uncomplicated cases; (4) cardiac surgery with an emphasis on early intervention without delay for complicated cases; and (5) shared management decision by the endocarditis team. Most evidence came from observational studies and expert opinions. The guidelines strongly support a patient-centred approach with a shared decision process by a multidisciplinary team that should be implemented either in tertiary referral centres, becoming heart valve centres, and referral centres. A continuous sharing of data is warranted in the hospitals' network between heart valve centres, which are used for referrals for complicated cases of infective endocarditis, and referral centres, which should be able to manage uncomplicated cases of infective endocarditis.

Clinical characteristics and outcomes in pseudomonas endocarditis: a systematic review of individual cases : Systematic review of pseudomonas endocarditis

BACKGROUND

The landscape of Pseudomonas infective endocarditis (IE) is evolving with the widespread use of cardiac implantable devices and hospital-acquired infections. This systematic review aimed to evaluate the emerging risk factors and outcomes in Pseudomonas IE.

METHODS

A literature search was performed in major electronic databases (PubMed, Scopus, and Google Scholar) with appropriate keywords and combinations till November 2023. We recorded data for risk factors, diagnostic and treatment modalities. This study is registered with PROSPERO, CRD42023442807.

RESULTS

A total of 218 cases (131 articles) were included. Intravenous drug use (IDUs) and prosthetic valve endocarditis (PVE) were major risk factors for IE (37.6% and 22%). However, the prosthetic valve was the predominant risk factor in the last two decades (23.5%). Paravalvular complications (paravalvular leak, abscess, or pseudoaneurysm) were described in 40 cases (18%), and the vast majority belonged to the aortic valve (70%). The mean time from symptom onset to presentation was 14 days. The incidence of difficult-to-treat resistant (DTR) pseudomonas was 7.4%. Valve replacement was performed in 57.3% of cases. Combination antibiotics were used in most cases (77%), with the aminoglycosides-based combination being the most frequently used (66%). The overall mortality rate was 26.1%. The recurrence rate was 11.2%. Almost half of these patients were IDUs (47%), and most had aortic valve endocarditis (76%).

CONCLUSIONS

This review highlights the changing epidemiology of Pseudomonas endocarditis with the emergence of prosthetic valve infections. Acute presentation and associated high mortality are characteristic of Pseudomonas IE and require aggressive diagnostic and therapeutic approach.

Endocarditis, invasive dental procedures, and antibiotic prophylaxis efficacy in US Medicaid patients

OBJECTIVE

Antibiotic prophylaxis is recommended before invasive dental procedures to prevent endocarditis in those at high risk, but supporting data are sparse. We therefore investigated any association between invasive dental procedures and endocarditis, and any antibiotic prophylaxis effect on endocarditis incidence.

SUBJECTS AND METHODS

Cohort and case-crossover studies were performed on 1,678,190 Medicaid patients with linked medical, dental, and prescription data.

RESULTS

The cohort study identified increased endocarditis incidence within 30 days of invasive dental procedures in those at high risk, particularly after extractions (OR 14.17, 95% CI 5.40-52.11, p < 0.0001) or oral surgery (OR 29.98, 95% CI 9.62-119.34, p < 0.0001). Furthermore, antibiotic prophylaxis significantly reduced endocarditis incidence following invasive dental procedures (OR 0.20, 95% CI 0.06-0.53, p < 0.0001). Case-crossover analysis confirmed the association between invasive dental procedures and endocarditis in those at high risk, particularly following extractions (OR 3.74, 95% CI 2.65-5.27, p < 0.005) and oral surgery (OR 10.66, 95% CI 5.18-21.92, p < 0.0001). The number of invasive procedures, extractions, or surgical procedures needing antibiotic prophylaxis to prevent one endocarditis case was 244, 143 and 71, respectively.

CONCLUSIONS

Invasive dental procedures (particularly extractions and oral surgery) were significantly associated with endocarditis in high-risk individuals, but AP significantly reduced endocarditis incidence following these procedures, thereby supporting current guideline recommendations.

An infective endocarditis complicated by multiple septic emboli: case report

BACKGROUND

Owing to challenges associated with heart failure and cardiac embolism, infectious endocarditis emerges as a critical pathology characterized by elevated mortality and morbidity rates. Our case stands out as a rare instance of endocarditis involving multisystem embolization, with a successful outcome.

CASE PRESENTATION

We present the case of an 81-year-old man whose admission was further complicated by various septic emboli affecting the brain (manifesting as a brain abscess and ischemic stroke), spleen (resulting in splenic infarction), and spinal cord. The patient received a diagnosis of infective endocarditis affecting the native mitral valve. Following prompt medical and surgical intervention, the overall progression was favorable despite encountering several challenges.

CONCLUSIONS

This case is notable for its detailed description and analysis of the multiple embolic events. More importantly, it underscores the significance of timely surgical intervention and the collaborative approach of a heart team in the face of complicated endocarditis marked by numerous septic emboli. Despite the typically grim prognosis associated with such cases, the outcomes emphasize the positive impact of timely surgery on prognosis.

Healthcare exposures and associated risk of endocarditis after open-heart cardiac valve surgery

BACKGROUND

Infective endocarditis (IE) following cardiac valve surgery is associated with high morbidity and mortality. Data on the impact of iatrogenic healthcare exposures on this risk are sparse. This study aimed to investigate risk factors including healthcare exposures for post open-heart cardiac valve surgery endocarditis (PVE).

METHODS

In this population-linkage cohort study, 23,720 patients who had their first cardiac valve surgery between 2001 and 2017 were identified from an Australian state-wide hospital-admission database and followed-up to 31 December 2018. Risk factors for PVE were identified from multivariable Cox regression analysis and verified using a case-crossover design sensitivity analysis.

RESULTS

In 23,720 study participants (median age 73, 63% male), the cumulative incidence of PVE 15 years after cardiac valve surgery was 7.8% (95% CI 7.3-8.3%). Thirty-seven percent of PVE was healthcare-associated, which included red cell transfusions (16% of healthcare exposures) and coronary angiograms (7%). The risk of PVE was elevated for 90 days after red cell transfusion (HR = 3.4, 95% CI 2.1-5.4), coronary angiogram (HR = 4.0, 95% CI 2.3-7.0), and healthcare exposures in general (HR = 4.0, 95% CI 3.3-4.8) (all p < 0.001). Sensitivity analysis confirmed red cell transfusion (odds ratio [OR] = 3.9, 95% CI 1.8-8.1) and coronary angiogram (OR = 2.6, 95% CI 1.5-4.6) (both p < 0.001) were associated with PVE. Six-month mortality after PVE was 24% and was higher for healthcare-associated PVE than for non-healthcare-associated PVE (HR = 1.3, 95% CI 1.1-1.5, p = 0.002).

CONCLUSIONS

The risk of PVE is significantly higher for 90 days after healthcare exposures and associated with high mortality.

Prognosis and follow-up of patients with prosthetic valve endocarditis treated conservatively in relation to WBC-SPECT imaging

BACKGROUND

Our objective was to evaluate in patients with prosthetic valve endocarditis (PVE) treated conservatively, the prognostic value of white blood cell (WBC) signal intensity on SPECT and to describe the evolution of the WBC signal under antibiotics.

METHODS

Patients with PVE treated conservatively and positive WBC-SPECT imaging were identified retrospectively. Signal intensity was classified as intense if equal to or higher, or mild if lower, than the liver signal. Clinical, biological, imaging and follow-up information were collected from medical files.

RESULTS

Among 47 patients, WBC signal was classified as intense in 10 patients and as mild, in 37. The incidence of the primary composite endpoint (death, late cardiac surgery, or relapse) was significantly higher in patients with intense vs. mild signal (90% vs. 11%). Twenty-five patients underwent a second WBC-SPECT imaging during follow-up. The prevalence of WBC signal decreased progressively from 89% between 3 and 6 weeks to 42% between 6 and 9 weeks and 8% more than 9 weeks after initiation of antibiotics.

CONCLUSIONS

In patients with PVE treated conservatively, intense WBC signal was associated with poor outcome. WBC-SPECT imaging appears as an interesting tool for risk stratification and to monitor locally the efficacy of antibiotic treatment.

Recent infective endocarditis research findings suggest dentists prescribe prophylactic antibiotics for patients having a bicuspid aortic valve or mitral valve prolapse

BACKGROUND

The scientific validity of the European Society of Cardiology's (ESC) infective endocarditis (IE) guidelines limiting provision of prophylactic antibiotics (AP) only to patients having cardiac anomalies (e.g., prosthetic valves) believed to place them at "high risk" of adverse events when undergoing high risk dental procedures (HRDP) is unclear.

MATERIAL AND METHODS

A systematic review of studies conducted between 2017 and 2022 and catalogued in the PubMed database was undertaken to ascertain if this edict was associated with changes in IE incidence, development of infection in unprotected cardiac anomalies, developing infection and resultant adverse clinical outcomes.

RESULTS

Retrieved were 19 published manuscripts, however of these, 16 were excluded because they did not bare upon the issues of concern. Among the three studies eligible for review were those in the Netherlands, Spain, and England. The results of the Dutch study denoted a significant increase in the incidence of IE cases over the projected historical trend (rate ratio: 1327, 95% CI 1.205-1.462; p<0.001) after the introduction of the ESC guidelines. The findings from the Spanish study evidenced the uniquely high in-hospital IE associated fatality rates suffered by patients having bicuspid aortic valves (BAV); 5.6% or mitral valve prolapse (MVP); 10%. The British study provided evidence that the incidence of fatal IE infection was significantly greater among an "intermediate risk" cohort of patients, (a group likely including those with BAC and MVP for which the ESC guidelines don't recommend AP), than among "high risk" patients (P = 0.002).

CONCLUSIONS

Patients having either a BAV or MVP are at significant risk of developing IE and suffering serious sequelae including death. The ESC guidelines must reclassify these specific cardiac anomalies into the "high risk" category so that AP are recognized as being needed prior to provision of HRDP.

The five-year trends in antibiotic prescription by dentists and antibiotic prophylaxis for tooth extraction: a region-wide claims study in Japan

BACKGROUND

Antimicrobial stewardship in dentistry and antibiotic prophylaxis for tooth extraction have been areas of concern in Japan, with limited research available.

METHODS

This cross-sectional study utilized the regional health insurance claims database in Japan to examine antibiotic prescription trends by dentists, including antibiotic regimens, timing of prescription, and days of supply for prophylactic antibiotic use during tooth extraction. Antibiotic prophylaxis for patients with prosthetic heart valves was also investigated.

FINDINGS

Antibiotic prescriptions by dentists decreased by 7% in 2019 compared to those in 2015, with third-generation cephalosporins still accounting for 48.5% in 2019. Amoxicillin prescription increased 3.9 times in 2019, although it only accounted for 8.4% of all antibiotic prescriptions. In 2019, amoxicillin was prescribed for 17.1% of all prophylactic antibiotics associated with tooth extraction, and 80% of prophylactic antibiotics were prescribed for 3 days or more, with 85% prescribed on the day of the procedure. However, only 60-70% of patients with prosthetic heart valves received antibiotic prophylaxis.

INTERPRETATION

Despite the increasing trend after the implementation of the National Action Plan on antimicrobial resistance, the proportion of amoxicillin prescriptions in dentistry remains low. Antimicrobial stewardship issues related to long-term prescription and timing of administration of prophylactic antibiotics for tooth extraction should be addressed. Dentists must recognize the risks associated with high-risk patients with prosthetic heart valves who require antibiotic prophylaxis, and physicians providing valve replacement therapy should inform patients of the requirement for prophylaxis before invasive dental procedures.

Oral hygiene and infective endocarditis: a case control study

OBJECTIVE

To determine if oral hygiene is associated with infective endocarditis (IE) among those at moderate risk for IE.

STUDY DESIGN

This is a case control study of oral hygiene among hospitalized patients with IE (cases) and outpatients with heart valve disease but without IE (controls). The primary outcome was the mean dental calculus index. Secondary outcomes included other measures of oral hygiene and periodontal disease (e.g., dental plaque, gingivitis) and categorization of blood culture bacterial species in case participants.

RESULTS

The 62 case participants had 53% greater mean dental calculus index than the 119 control participants (0.84, 0.55, respectively; difference = 0.29, 95% CI: 0.11, 0.48; P = .002) and 26% greater mean dental plaque index (0.88, 0.70, respectively; difference = 0.18, 95% CI: 0.01.0.36; P = .043). Overall, cases reported fewer dentist and dental hygiene visits (P = .013) and fewer dental visits in the 12 weeks before enrollment than controls (P = .007). Common oral bacteria were identified from blood cultures in 27 of 62 cases (44%).

CONCLUSIONS

These data provide evidence to support and strengthen current American Heart Association guidance that those at risk for IE can reduce potential sources of IE-related bacteremia by maintaining optimal oral health through regular professional dental care and oral hygiene procedures.

The patient with congenital heart disease in ambulatory surgery

The number of patients with congenital heart disease (CHD) undergoing ambulatory surgery is increasing. Deciding whether a CHD patient is suitable for an ambulatory procedure is still challenging. Several factors must be considered, including the type of planned procedure, the complexity of the underlying pathology, the American Society of Anesthesiologists' Physical Status classification of the patient, and other patient-specific factors, including comorbidity, chronic complications of CHD, medication, coagulation disorders, and issues related to the presence of a pacemaker (PM) or cardioverter-defibrillator. Numerous studies reported higher perioperative mortality and morbidity rates in surgical patients with CHD than non-CHD patients. However, most of these studies were conducted in a cohort of hospitalized patients and may not reflect the ambulatory setting. The current review aims to provide the anesthesiologist with an overview and practical recommendations on selecting and managing a CHD patient scheduled for an ambulatory procedure.

Infective endocarditis in adults with congenital heart disease: Contemporary management and related outcomes in Central and South-Eastern European region

BACKGROUND

Infective endocarditis (IE) remains major cause of morbidity and mortality in adult congenital heart disease (ACHD). Limited data exists on ACHD with IE in Central and South-Eastern European (CESEE) countries. The aim of this study is to characterize contemporary management and assess outcomes of ACHD with IE in CESEE region.

METHODS

Data on ACHD patients with IE from 9 tertiary centres in 9 different CESEE countries between 2015 and 2020 was included. Baseline demographics, clinical presentation, indication for surgery, outcomes, hospital and all-cause-1-year mortality were studied.

RESULTS

A total of 295 ACHD patients (mean age 40 ± 14 years) with IE were included. Median time from symptoms onset to establishing diagnosis was 25 (11-59) days. The majority of patients (203, 68.8%) received previous empiric oral antibiotic therapy. The highest incidence of IE was observed on native and left sided valves, 194(65.8%) and 204(69.2%), respectively. More than half had a vegetation size ≥10 mm (164, 55.6%); overall 138 (46.8%) had valve complications and 119 (40.3%) had heart failure. In-hospital mortality was 26 (8.8%).

CONCLUSION

There is clear delay in establishing IE diagnosis amongst ACHD patients in CESEE countries. Adequate diagnosis is hampered by common prescription of empiric antibiotics before establishing formal diagnosis. Hence, patients commonly present with associated complications requiring surgery. Hospital treatment and survival are, nevertheless, comparable to other Western European countries. Improved awareness and education of patients and medical profession regarding IE preventive measures, risks, signs, and symptoms are urgently needed. Empiric antibiotic prescription before blood cultures are taken must be omitted.

Gemella sanguinis Infective Endocarditis-Challenging Management of an 8-Year-Old with Duchenne Dystrophy and Undiagnosed Congenital Heart Disease: A Case Report

Congenital heart disease (CHD) remains a predisposing cardiac condition for infective endocarditis (IE). Case report: We present the case of 8-year-old boy with no known pre-existing cardiac disease diagnosed with infective endocarditis (IE) with Gemella sanguinis. After admission, he underwent transthoracic echocardiography (TTE), which revealed the presence of Shone syndrome with a bicuspid valve, mitral parachute valve and severe aortic coarctation. He developed a paravalvular aortic abscess with severe aortic regurgitation and left ventricle (LV) systolic dysfunction for which he required a complex surgical intervention after six weeks of antibiotic treatment, consisting of Ross operation and coarctectomy, with a complicated postoperative course, cardiac arrest and ECMO support for five days. The evolution was slow and favorable, with no significant residual valvular lesions. However, persistent LV systolic dysfunction and increased muscle enzymes required further investigation to establish a genetic diagnosis of Duchenne disease. As Gemella is not considered a frequent pathogen of IE, no current guidelines refer specifically to it. Additionally, the predisposing cardiac condition of our patient is not currently classified as "high-risk" for IE; this is not considered an indication for IE prophylaxis in the current guidelines. Conclusion: This case illustrates the importance of accurate bacteriological diagnosis in infective endocarditis and poses concerns regarding the necessity of IE prophylaxis in "moderate risk" cardiac conditions such as congenital valvular heart disease, especially aortic valve malformations.

Perception Regarding the NICE Guideline on Antibiotic Prophylaxis against Infective Endocarditis Following Dental Procedures: A Cross-Sectional Study

This study explores the opinions of Malaysian clinical specialists on the antibiotic prophylaxis against infective endocarditis (IE) as described in the 2008 National Institute for Health and Care Excellence (NICE) guideline. This cross-sectional study was performed from September 2017 to March 2019. The self-administered questionnaire comprised two sections: background information of the specialists and their opinions on the NICE guideline. The questionnaire was distributed to 794 potential participants, and 277 responded (response rate of 34.9%). In general, 49.8% of the respondents believed that clinicians should adhere to the guideline, although the majority of oral and maxillofacial surgeons (54.5%) actually disagreed with this view. The dental procedures that were perceived as presented moderate-to-high risk for IE were minor surgery for an impacted tooth with a recent episode of infection, dental implant surgery, periodontal surgery and dental extraction in patients with poor oral hygiene. The cardiac conditions that were strongly recommended for antibiotic prophylaxis were severe mitral valve stenosis or regurgitation and previous IE. Less than half of Malaysian clinical specialists agreed with the changes in the 2008 NICE guideline, contributing to their insistence that antibiotic prophylaxis is still needed for high-risk cardiac conditions and selected invasive dental procedures.

Antibiotic prophylaxis for patients at risk of infective endocarditis: an increasing evidence base?

Around 100 years ago, the first link between infective endocarditis (IE) and dental procedures was hypothesised; shortly after, physicians began to use antibiotics in an effort to reduce the risk of developing IE. Whether invasive dental procedures are linked to the development of IE, and antibiotic prophylaxis (AP) is effective, have since remained topics of controversy. This controversy, in large part, has been due to the lack of prospective randomised clinical trial data. From this suboptimal position, guideline committees representing different societies and countries have struggled to reach an optimal position on whether AP use is needed for invasive dental procedures (or other procedures) and in whom. We present the findings from an investigation involving a large US patient database, published earlier this year, by Thornhill and colleagues. The work featured the use of both a cohort and case-crossover design and demonstrated there was a significant temporal association between invasive dental procedures and development of IE in high-IE-risk patients. Furthermore, the study showed that AP use was associated with a reduced risk of IE. Additional data, also published this year, from a separate study using nationwide hospital admissions data from England by Thornhill's group, showed that certain dental and non-dental procedures were significantly associated with the subsequent development of IE. Two other investigations have reported similar concerns for non-dental invasive procedures and risk of IE. Collectively, the results of this work support a re-evaluation of the current position taken by the National Institute for Health and Care Excellence (NICE) and other organisations that are responsible for publishing practice guidelines.

Infective endocarditis in a cohort of adult CHD patients

BACKGROUND

CHD increases the risk of infective endocarditis due to the substrate of prosthetic materials and residual lesions. However, lesion-specific and mortality risks data are lacking. We sought to analyse clinical course and mortality of infective endocarditis in a cohort of adult CHD.

METHODS

Retrospective analysis of all cases of proven and probable infective endocarditis (Duke's criteria) followed in our adult CHD clinic between 1970 and August, 2021. Epidemiological, clinical and imaging data were analysed. Predictors of surgical treatment and mortality were assessed using regression analysis.

RESULTS

During a mean follow-up of 15.8 ± 10.9 years, 96 patients had 105 infective endocarditis episodes, half with previous cardiac surgery (corrective or palliative). The most frequent diagnoses were: ventricular septal defect, bicuspid aortic valve, Tetralogy of Fallot and pulmonary atresia. The site of infection was identified by echocardiography in 82 episodes (91%), most frequently in aortic (n = 27), tricuspid (n = 15), and mitral (n = 13) valves. Blood cultures were positive in 79% of cases, being streptococci (n = 29) and staphylococci (n = 23) the predominant pathogens. Surgery was necessary in 40% and the in-hospital mortality was 10.5%, associated with heart failure (p < 0.001; OR 13.5) and a non-surgical approach (p = 0.003; OR 5.06).

CONCLUSIONS

In an adult CHD cohort, infective endocarditis was more frequent in patients with ventricular septal defect and bicuspid aortic valves, which contradicts the current guidelines that excludes them from prophylaxis. Surgical treatment is often required and mortality remains substantial. Prevention of this serious complication should be one of the major tasks in the care of adults with CHD.

Temporal association between invasive procedures and infective endocarditis

OBJECTIVE

Antibiotic prophylaxis has been recommended for patients at increased risk of infective endocarditis (IE) undergoing specific invasive procedures (IPs) despite a lack of data supporting its use. Therefore, antibiotic prophylaxis recommendations ceased in the mid-2000s for all but those at high IE risk undergoing invasive dental procedures. We aimed to quantify any association between IPs and IE.

METHODS

All 14 731 IE hospital admissions in England between April 2010 and March 2016 were identified from national admissions data, and medical records were searched for IP performed during the 15-month period before IE admission. We compared the incidence of IP during the 3 months immediately before IE admission (case period) with the incidence during the preceding 12 months (control period) to determine whether the odds of developing IE were increased in the 3 months after certain IP.

RESULTS

The odds of IE were increased following permanent pacemaker and defibrillator implantation (OR 1.54, 95% CI 1.27 to 1.85, p<0.001), extractions/surgical tooth removal (OR 2.14, 95% CI 1.22 to 3.76, p=0.047), upper (OR 1.58, 95% CI 1.34 to 1.85, p<0.001) and lower gastrointestinal endoscopy (OR 1.66, 95% CI 1.35 to 2.04, p<0.001) and bone marrow biopsy (OR 1.76, 95% CI 1.16 to 2.69, p=0.039). Using an alternative analysis, bronchoscopy (OR 1.33, 95% CI 1.06 to 1.68, p=0.049) and blood transfusions/red cell/plasma exchange (OR 1.2, 95% CI 1.07 to 1.35, p=0.012) were also associated with IE.

CONCLUSIONS

This study identifies a significant association between specific IPs (permanent pacemaker and defibrillator implantation, dental extraction, gastrointestinal endoscopy and bronchoscopy) and subsequent IE that warrants re-evaluation of current antibiotic prophylaxis recommendations to prevent IE in high IE risk individuals.

Determinants of adherence to oral hygiene prophylaxis guidelines in patients with previous infective endocarditis

BACKGROUND

Infective endocarditis (IE) is characterized by low incidence but high mortality. Patients with a history of IE are at highest risk. Adherence to prophylaxis recommendations is poor. We sought to identify determinants of adherence to oral hygiene guidelines on IE prophylaxis in patients with a history of IE.

METHODS

Using data from the cross-sectional, single-centre POST-IMAGE study, we analysed demographic, medical and psychosocial factors. We defined patients as adherent to prophylaxis if they declared going to the dentist at least annually and brushing their teeth at least twice a day. Depression, cognitive status and quality of life were assessed using validated scales.

RESULTS

Of 100 patients enrolled, 98 completed the self-questionnaires. Among these, 40 (40.8%) were categorized as adherent to prophylaxis guidelines, and were less likely to be smokers (5.1% vs. 25.0%; P=0.02) or have symptoms of depression (36.6% vs. 70.8%; P<0.01) or cognitive decline (0% vs. 15.5%; P=0.05). Conversely, they had higher rates of: valvular surgery since the index IE episode (17.5% vs. 3.4%; P=0.04), searching for information on IE (61.1% vs. 46.3%, P=0.05), and considering themselves as adherent to IE prophylaxis (58.3% vs. 32.1%; P=0.03). Tooth brushing, dental visits and antibiotic prophylaxis were correctly identified as measures to prevent IE recurrence in 87.7%, 90.8% and 92.8% of patients, respectively, and did not differ according to adherence to oral hygiene guidelines.

CONCLUSIONS

Self-reported adherence to secondary oral hygiene guidelines on IE prophylaxis is low. Adherence is unrelated to most patient characteristics, but to depression and cognitive impairment. Poor adherence appears related more to a lack of implementation rather than insufficient knowledge. Assessment of depression may be considered in patients with IE.

Current Views on Infective Endocarditis: Changing Epidemiology, Improving Diagnostic Tools and Centering the Patient for Up-to-Date Management

Infective endocarditis (IE) is a rare but potentially life-threatening disease, sometimes with longstanding sequels among surviving patients. The population at high risk of IE is represented by patients with underlying structural heart disease and/or intravascular prosthetic material. Taking into account the increasing number of intravascular and intracardiac procedures associated with device implantation, the number of patients at risk is growing too. If bacteremia develops, infected vegetation on the native/prosthetic valve or any intracardiac/intravascular device may occur as the final result of invading microorganisms/host immune system interaction. In the case of IE suspicion, all efforts must be focused on the diagnosis as IE can spread to almost any organ in the body. Unfortunately, the diagnosis of IE might be difficult and require a combination of clinical examination, microbiological assessment and echocardiographic evaluation. There is a need of novel microbiological and imaging techniques, especially in cases of blood culture-negative. In the last few years, the management of IE has changed. A multidisciplinary care team, including experts in infectious diseases, cardiology and cardiac surgery, namely, the Endocarditis Team, is highly recommended by the current guidelines.

Antibiotic prophylaxis before dental procedures to prevent infective endocarditis: a systematic review

PURPOSE

Infective endocarditis (IE) is a severe bacterial infection. As a measure of prevention, the administration of antibiotic prophylaxis (AP) prior to dental procedures was recommended in the past. However, between 2007 and 2009, guidelines for IE prophylaxis changed all around the word, limiting or supporting the complete cessation of AP. It remains unclear whether AP is effective or not against IE.

METHODS

We conducted a systematic review whether the administration of AP in adults before any dental procedure, compared to the non-administration of such drugs, has an effect on the risk of developing IE. We searched for studies in the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE via OVID, and EMBASE. Two different authors filtered articles independently and data extraction was performed based on a pre-defined protocol.

RESULTS

The only cohort study meeting our criteria included patients at high-risk of IE. Analysis of the extracted data showed a non-significant decrease in the risk of IE when high-risk patients take AP prior to invasive dental procedures (RR 0.39, p-value 0.11). We did not find other studies including patients at low or moderate risk of IE. Qualitative evaluation of the excluded articles reveals diversity of results and suggests that most of the state-of-the-art articles are underpowered.

CONCLUSIONS

Evidence to support or discourage the use of AP prior to dental procedures as a prevention for IE is very low. New high-quality studies are needed, even though such studies would require big settings and might not be immediately feasible.

Surgical outcomes of infective endocarditis in pediatrics: Moving the needle to a contemporary, multidisciplinary approach

BACKGROUND

Infective endocarditis (IE) is an uncommon disease in children that, when present, is accompanied by significant morbidity and mortality. The presence of congenital heart disease often complicates management. The aim of the present study is to describe the characteristics and outcomes of children undergoing surgery for IE.

METHODS

A retrospective chart review from 2004 to 2020 was conducted to identify consecutive patients younger than age 20 years with IE undergoing surgery.

RESULTS

A total of 94 patients with IE were identified, of whom 47 underwent surgery at a median age of 16.7 years. Thirty-one patients (65.95%) had congenital heart disease. Vegetation and embolic phenomena occurred in 41 and 29 patients (87.23% and 61.7%), respectively, with the brain as most common location (57.1%). Native valve involvement had a greater tendency to embolize (P < .001). Staphylococcus spp was the most common organism (49%). The mitral valve was the most affected (31.9%). Seven (14.9%) patients had multivalvar involvement and valve replacement was the most common procedure performed (37 patients; 78.7%). There were 3 operative deaths (6.4%). Median length of hospital stay was 21 days. Risk factors for prolonged hospital stay were time to surgery in days (P < .001) and native valvar involvement (P = .05). Five patients (10.6%) had postoperative recurrent IE. Survival at 1 and 5 years was 93.6% and 89.4%, respectively.

CONCLUSIONS

Children with IE can undergo surgery with acceptable results. The morbidity, but not mortality, is driven by embolic complications. Staphylococcus spp and native valve involvement are significant risk factors. VIDEO ABSTRACT.

Staphylococcus aureus bacteremia and infective endocarditis in a patient with epidermolytic hyperkeratosis: A case report

BACKGROUND

Staphylococcus aureus bacteraemia (SAB) is among the leading causes of bacteraemia and infectious endocarditis. The frequency of infectious endocarditis (IE) among SAB patients ranges from 5% to 10%-12%. In adults, the characteristics of epidermolytic hyperkeratosis (EHK) include hyperkeratosis, erosions, and blisters. Patients with inflammatory skin diseases and some diseases involving the epidermis tend to exhibit a disturbed skin barrier and tend to have poor cell-mediated immunity.

CASE SUMMARY

We describe a case of SAB and infective endocarditis in a 43-year-old male who presented with fever of unknown origin and skin diseases. After genetic tests, the skin disease was diagnosed as EHK.

CONCLUSION

A breached skin barrier secondary to EHK, coupled with inadequate sanitation, likely provided the opportunity for bacterial seeding, leading to IE and deep-seated abscess or organ abscess. EHK may be associated with skin infection and multiple risk factors for extracutaneous infections. Patients with EHK should be treated early to minimize their consequences. If patients with EHK present with prolonged fever of unknown origin, IE and organ abscesses should be ruled out, including metastatic spreads.

Value of Time-Resolved Cardiac CT in Children and Young Adults with Congenital Heart Disease and Infective Endocarditis

BACKGROUND

Diagnosis of infective endocarditis (IE) can be challenging due to negative blood cultures and diagnostic limitations of various imaging modalities. Transesophageal echocardiography (TEE) is the gold standard imaging modality for visualization of valvular vegetations. However, due to the anterior location of the pulmonary valve, post-surgical changes, and sedation requirement, TEE can be challenging in the pediatric population. The aim of this study was to assess the value of Cardiac CT (CCT) for diagnosis of IE in children and young adults with congenital heart disease (CHD).

METHODS

This is a single-center retrospective study of pediatric patients with CHD and diagnosis of IE who underwent CCT from 2018 to 2022. Data collected included age, gender, cardiac diagnosis, clinical presentation, echocardiographic/CCT findings, and blood culture results. In addition, modified Duke criteria (MDC) for the diagnosis of IE were applied with and without CCT findings as the diagnostic imaging criterion.

RESULTS

Fourteen patients were included in this study with a median age of 11 years old. Nine patients were female. Ten patients had IE of the RV-PA conduit and four patients had IE of the aortic valve. Using MDC, 4 patients had definite IE. After including CCT findings, 11 patients (79%) met MDC for definite IE. Blood cultures were positive in 12 patients. CCT revealed the following complications: thromboembolic findings/pseudoaneurysms in 5 patients each and prosthetic valve perforation/prosthetic valve leak in one patient each.

CONCLUSIONS

This study reinforces the complimentary role of CCT to echocardiography in the work-up and diagnosis of IE in patients with CHD. With further improvement in lowering radiation exposure, CCT may have a key role in the diagnostic work-up of endocarditis and could be implemented in the diagnostic criteria of IE.

Risk of infective endocarditis associated with invasive dental procedures in patients with cardiac rhythm devices

AIMS

The incidence of infective endocarditis related to cardiac implantable electronic devices (CIEDs) has gradually increased. The risk associated with dental procedures in patients with CIED implantation and the need for prevention of infective endocarditis remain unclear. The present study investigated the incidence and risk of infective endocarditis associated with invasive dental procedures in patients with CIEDs.

METHODS AND RESULTS

We analysed a nationwide population-based cohort of patients with CIEDs who underwent dental procedures. We performed a self-controlled case series analysis and evaluated the incidence rate ratio of infective endocarditis 3 months after dental procedures. Of a total of 62 019 patients who underwent CIED implantation, 32 536 patients underwent at least one dental procedure during follow-up, and the mean number of dental procedures was 3.4 per patient. They were 152 infections with an incidence of 445 per 100 000 person-years in the dental procedure period and 500 events at an incidence of 255 per 100 000 person-years in the non-dental procedure period. The CIED-related infective endocarditis in the dental procedure period occurred significantly more frequently than during non-dental procedure periods (odds ratio, 1.75; 95% confidence interval, 1.48-2.05; P < 0.001). The mean time interval from dental procedure to infective endocarditis was 59.6 ± 47.3 days.

CONCLUSION

Invasive dental procedures are associated with an increased risk of infective endocarditis in those who underwent CIED implantation. Appropriate preventive therapy might be needed in these patients.

Antibiotic Prophylaxis Against Infective Endocarditis Before Invasive Dental Procedures

BACKGROUND

Antibiotic prophylaxis (AP) before invasive dental procedures (IDPs) is recommended to prevent infective endocarditis (IE) in those at high IE risk, but there are sparse data supporting a link between IDPs and IE or AP efficacy in IE prevention.

OBJECTIVES

The purpose of this study was to investigate any association between IDPs and IE, and the effectiveness of AP in reducing this.

METHODS

We performed a case-crossover analysis and cohort study of the association between IDPs and IE, and AP efficacy, in 7,951,972 U.S. subjects with employer-provided Commercial/Medicare-Supplemental coverage.

RESULTS

Time course studies showed that IE was most likely to occur within 4 weeks of an IDP. For those at high IE risk, case-crossover analysis demonstrated a significant temporal association between IE and IDPs in the preceding 4 weeks (OR: 2.00; 95% CI: 1.59-2.52; P = 0.002). This relationship was strongest for dental extractions (OR: 11.08; 95% CI: 7.34-16.74; P < 0.0001) and oral-surgical procedures (OR: 50.77; 95% CI: 20.79-123.98; P < 0.0001). AP was associated with a significant reduction in IE incidence following IDP (OR: 0.49; 95% CI: 0.29-0.85; P = 0.01). The cohort study confirmed the associations between IE and extractions or oral surgical procedures in those at high IE risk and the effect of AP in reducing these associations (extractions: OR: 0.13; 95% CI: 0.03-0.34; P < 0.0001; oral surgical procedures: OR: 0.09; 95% CI: 0.01-0.35; P = 0.002).

CONCLUSIONS

We demonstrated a significant temporal association between IDPs (particularly extractions and oral-surgical procedures) and subsequent IE in high-IE-risk individuals, and a significant association between AP use and reduced IE incidence following these procedures. These data support the American Heart Association, and other, recommendations that those at high IE risk should receive AP before IDP.

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.

Association between Endodontic Infection, Its Treatment and Systemic Health: A Narrative Review

The ‘Focal Infection Era in Dentistry’ in the late 19th and early 20th century resulted in widespread implementation of tooth extraction and limited the progress of endodontics. The theory proposed that bacteria and toxins entrapped in dentinal tubules could disseminate systemically to remote body parts, resulting in many types of degenerative systemic diseases. This theory was eventually refuted due to anecdotal evidence. However, lately there has been increased interest in investigating whether endodontic disease could have an impact on general health. There are reviews that have previously been carried out on this subject, but as new data have emerged since then, this review aims to appraise the available literature investigating the dynamic associations between apical periodontitis, endodontic treatment, and systemic health. The available evidence regarding focal infection theory, bacteraemia and inflammatory markers was appraised. The review also collated the available research arguing the associations of apical periodontitis with cardiovascular diseases, diabetes mellitus, adverse pregnancy outcome and autoimmune disorders, along with the effect of statins and immunomodulators on apical periodontitis prevalence and endodontic treatment prognosis. There is emerging evidence that bacteraemia and low-grade systemic inflammation associated with apical periodontitis may negatively impact systemic health, e.g., development of cardiovascular diseases, adverse pregnancy outcomes, and diabetic metabolic dyscontrol. However, there is limited information supporting the effect of diabetes mellitus or autoimmune disorders on the prevalence and prognosis post endodontic treatment. Furthermore, convincing evidence supports that successful root canal treatment has a beneficial impact on systemic health by reducing the inflammatory burden, thereby dismissing the misconceptions of focal infection theory. Although compelling evidence regarding the association between apical periodontitis and systemic health is present, further high-quality research is required to support and establish the benefits of endodontic treatment on systemic health.

Infective endocarditis following invasive dental procedures: IDEA case-crossover study

BACKGROUND

Infective endocarditis is a heart infection with a first-year mortality rate of ≈ 30%. It has long been thought that infective endocarditis is causally associated with bloodstream seeding with oral bacteria in ≈ 40-45% of cases. This theorem led guideline committees to recommend that individuals at increased risk of infective endocarditis should receive antibiotic prophylaxis before undergoing invasive dental procedures. However, to the best of our knowledge, there has never been a clinical trial to prove the efficacy of antibiotic prophylaxis and there is no good-quality evidence to link invasive dental procedures with infective endocarditis. Many contend that oral bacteria-related infective endocarditis is more likely to result from daily activities (e.g. tooth brushing, flossing and chewing), particularly in those with poor oral hygiene.

OBJECTIVE

The aim of this study was to determine if there is a temporal association between invasive dental procedures and subsequent infective endocarditis, particularly in those at high risk of infective endocarditis.

DESIGN

This was a self-controlled, case-crossover design study comparing the number of invasive dental procedures in the 3 months immediately before an infective endocarditis-related hospital admission with that in the preceding 12-month control period.

SETTING

The study took place in the English NHS.

PARTICIPANTS

All individuals admitted to hospital with infective endocarditis between 1 April 2010 and 31 March 2016 were eligible to participate.

INTERVENTIONS

This was an observational study; therefore, there was no intervention.

MAIN OUTCOME MEASURE

The outcome measure was the number of invasive and non-invasive dental procedures in the months before infective endocarditis-related hospital admission.

DATA SOURCES

NHS Digital provided infective endocarditis-related hospital admissions data and dental procedure data were obtained from the NHS Business Services Authority.

RESULTS

The incidence rate of invasive dental procedures decreased in the 3 months before infective endocarditis-related hospital admission (incidence rate ratio 1.34, 95% confidence interval 1.13 to 1.58). Further analysis showed that this was due to loss of dental procedure data in the 2-3 weeks before any infective endocarditis-related hospital admission.

LIMITATIONS

We found that urgent hospital admissions were a common cause of incomplete courses of dental treatment and, because there is no requirement to record dental procedure data for incomplete courses, this resulted in a significant loss of dental procedure data in the 2-3 weeks before infective endocarditis-related hospital admissions. The data set was also reduced because of the NHS Business Services Authority's 10-year data destruction policy, reducing the power of the study. The main consequence was a loss of dental procedure data in the critical 3-month case period of the case-crossover analysis (immediately before infective endocarditis-related hospital admission), which did not occur in earlier control periods. Part of the decline in the rate of invasive dental procedures may also be the result of the onset of illness prior to infective endocarditis-related hospital admission, and part may be due to other undefined causes.

CONCLUSIONS

The loss of dental procedure data in the critical case period immediately before infective endocarditis-related hospital admission makes interpretation of the data difficult and raises uncertainty over any conclusions that can be drawn from this study.

FUTURE WORK

We suggest repeating this study elsewhere using data that are unafflicted by loss of dental procedure data in the critical case period.

TRIAL REGISTRATION

This trial is registered as ISRCTN11684416.

FUNDING

This project was funded by the National Institute for Health and Care Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 26, No. 28. See the NIHR Journals Library website for further project information.

Clinical profile and outcome of recurrent infective endocarditis

AIMS

Purpose of this study is to compare the clinical course and outcome of patients with recurrent versus first-episode infective endocarditis (IE).

METHODS

Patients with recurrent and first-episode IE enrolled in the EUROpean ENDOcarditis (EURO-ENDO) registry including 156 centres were identified and compared using propensity score matching. Recurrent IE was classified as relapse when IE occurred ≤6 months after a previous episode or reinfection when IE occurred >6 months after the prior episode.

RESULTS

3106 patients were enrolled: 2839 (91.4%) patients with first-episode IE (mean age 59.4 (±18.1); 68.3% male) and 267 (8.6%) patients with recurrent IE (mean age 58.1 (±17.7); 74.9% male). Among patients with recurrent IE, 13.2% were intravenous drug users (IVDUs), 66.4% had a repaired or replaced valve with the tricuspid valve being more frequently involved compared with patients with first-episode IE (20.3% vs 14.1%; p=0.012). In patients with a first episode of IE, the aortic valve was more frequently involved (45.6% vs 39.5%; p=0.061). Recurrent relapse and reinfection were 20.6% and 79.4%, respectively. Staphylococcus aureus was the microorganism most frequently observed in both groups (p=0.207). There were no differences in in-hospital and post-hospitalisation mortality between recurrent and first-episode IE. In patients with recurrent IE, in-hospital mortality was higher in IVDU patients. Independent predictors of poorer in-hospital and 1-year outcome, including the occurrence of cardiogenic and septic shock, valvular disease severity and failure to undertake surgery when indicated, were similar for recurrent and first-episode IE.

CONCLUSIONS

In-hospital and 1-year mortality was similar in patients with recurrent and first-episode IE who shared similar predictors of poor outcome.

Endocardite Infecciosa: Ainda mais Desafios que Certezas

Após catorze décadas de evolução médica e tecnológica, a endocardite infeciosa continua a desafiar médicos no seu diagnóstico e manejo diário. O aumento da incidência, alterações demográficas (afetando pacientes mais idosos), microbiologia com taxas de infeção por Staphylococcus mais elevadas, com complicações graves ainda frequentes e uma mortalidade substancial tornam a endocardite uma doença muito complexa. Apesar de tudo, a inovação no seu diagnóstico, nomeadamente na área da microbiologia e imagem, e a melhoria nos cuidados intensivos e na cirurgia cardíaca (quanto às técnicas, materiais usados e momento de intervenção) podem ter um impacto no seu prognóstico. Os desafios persistem, incluindo repensar a profilaxia, melhorar os critérios de diagnóstico incluindo a endocardite com culturas negativas e endocardite de prótese valvar, o timing para a intervenção cirúrgica, e sua realização ou não na presença de acidente vascular cerebral isquêmico e em usuários de drogas intravenosas. Uma estratégia combinada na endocardite infeciosa é fundamental, incluindo decisões e protocolos clínicos avançados, um manejo multidisciplinar, organização e políticas de saúde que culminem em melhores resultados para os nossos pacientes.

Peri-Operative Prophylaxis in Patients of Neonatal and Pediatric Age Subjected to Cardiac and Thoracic Surgery: A RAND/UCLA Appropriateness Method Consensus Study

Surgical site infections (SSIs) represent a potential complication of surgical procedures, with a significant impact on mortality, morbidity, and healthcare costs. Patients undergoing cardiac surgery and thoracic surgery are often considered patients at high risk of developing SSIs. This consensus document aims to provide information on the management of peri-operative antibiotic prophylaxis for the pediatric and neonatal population undergoing cardiac and non-cardiac thoracic surgery. The following scenarios were considered: (1) cardiac surgery for the correction of congenital heart disease and/or valve surgery; (2) cardiac catheterization without the placement of prosthetic material; (3) cardiac catheterization with the placement of prosthetic material; (4) implantable cardiac defibrillator or epicardial pacemaker placement; (5) patients undergoing ExtraCorporal Membrane Oxygenation; (6) cardiac tumors and heart transplantation; (7) non-cardiac thoracic surgery with thoracotomy; (8) non-cardiac thoracic surgery using video-assisted thoracoscopy; (9) elective chest drain placement in the pediatric patient; (10) elective chest drain placement in the newborn; (11) thoracic drain placement in the trauma setting. This consensus provides clear and shared indications, representing the most complete and up-to-date collection of practice recommendations in pediatric cardiac and thoracic surgery, in order to guide physicians in the management of the patient, standardizing approaches and avoiding the abuse and misuse of antibiotics.

Sex-Specific Risk Factors for Short- and Long-Term Outcomes after Surgery in Patients with Infective Endocarditis

(1) Background: Surgery for infective endocarditis (IE) is associated with considerable mortality and it is controversial whether the female gender is predictive for a worse outcome. This large single-center study investigated the impact of sex on outcomes after surgery for IE. (2) Methods: 413 patients (25.4% female) were included into this retrospective observational study. Univariate and multivariable analyses identified sex-specific risk factors for 30 day and late mortality. Survival was estimated by the Kaplan-Meier-method. (3) Results: Women presented more often with mitral valve infection (p = 0.039). Men presented more frequently with previous endocarditis (p = 0.045), coronary heart disease (p = 0.033), and aortic valve infection (p = 0.005). Blood transfusion occurred more frequently intraoperatively in women (p < 0.001), but postoperatively in men (p = 0.015) and men had a longer postoperative stay (p = 0.046). Women showed a higher 30 day mortality than men (p = 0.007) and female gender was predictive for 30 day mortality (OR 2.090). Late survival showed no sex-specific difference (p = 0.853), and the female gender was not an independent predictor for late mortality (p = 0.718). Risk factors for early and late mortality showed distinct sex-specific differences such as increased preoperative CRP level in women and culture-negative IE in men.

Dentists' knowledge and practices about infective endocarditis antibiotics prophylaxis among children in aseer region, Southwestern Saudi Arabia

Background

Infective endocarditis (IE) is a disease endangering human lives. Therefore, several prophylactic measures are required to improve the protection of endocarditis-prone patients from bacteremia resulting from various dental actions. These measures range from developing the dental hygiene to trials of different antimicrobial agents.

Objectives

To examine the knowledge and practices of dentists in Aseer Region, Saudi Arabia, regarding antibiotic prophylaxis against IE.

Design

Cross-sectional study.

Setting

Aseer Region, Saudi Arabia.

Patients and Methods

The participants were interviewed at their workplaces and the data collection sheet was constructed based on the guidelines of the American Heart Association/American College of Cardiology (AHA/ACC, 2017).

Main Outcome Measures

The examination of the data gathered was calculated using Statistical Package for Social Sciences (SPSS, version 25) such as to test the significance of variation in dentists' mean knowledge scores as per their personal characteristics. An output with P values <0.05 was statistically significant.

Sample Size

182 Dentists.

Results

Dentists' mean knowledge score was 17.5 ± 3.7 (out of 24). The least correct responses regarding dental procedures that require prophylactic antibiotics were "root canal treatment" (30.8%). Regarding cardiac conditions that require prophylactic antibiotics, dentists' least correct responses were "heart failure" (50%). Dentists' mean knowledge scores differed significantly according to their age groups (P = 0.032), nationality (P = 0.002), education/qualification (P = 0.002). Mean knowledge scores differed significantly according to dentists' years of experience (P = 0.018) and sources of information (P < 0.001). Amoxicillin was the most regularly recommended antibiotic (90.7%), while 86.8% correctly stated 30--60 min. before the procedure as the time for prophylactic antibiotic administration.

Conclusions

The knowledge of dentists in Aseer Region regarding the use of preventive drugs for the control and prevention of IE is suboptimal. The inclusion of the latest AHA guidelines into the dentistry curricula is highly recommended.

Limitations

Outcome are simultaneously assessed.

Devising a pro forma for dental screening of patients before invasive cardiac surgery

Certain types of invasive cardiac surgery can place patients at risk of developing infective endocarditis from dental pathology or dental treatment. University Hospital Bristol and Weston NHS Foundation Trust is the regional centre for cardiac surgery in the South West of the UK and is part of the South Wales and South West Congenital Heart Disease Network. As part of this network, the Special Care Dental Department within Bristol Dental Hospital provides dental screening for patients pending invasive cardiac surgery. These are conducted to identify dental pathology in individuals who will be at risk of infective endocarditis, so where possible, they are rendered dentally fit before their surgery.Presented is the information that led to the creation of a screening pro forma, for the dental assessment of patients before invasive cardiac surgery, suitable for use in primary or secondary care. This was produced following an audit, to ensure that along with identifying sources of dental pathology, the dental screening is also documenting the risk of dental pathology and modifiable risk factors. This enables tailored preventative advice which is important to help reduce a patient's lifetime risk of infective endocarditis from dental pathology. Other information used to help develop the pro forma taken from the audit, regional and national guidance is also discussed.

Risk of infective endocarditis after surgical and transcatheter aortic valve replacement

Objective

To define the incidence and risk factors for infective endocarditis (IE) following surgical aortic valve replacement (SAVR) and transcatheter aortic valve implantation (TAVI).

Methods

All patients who underwent first SAVR or TAVI in England between 2007 and 2016 were identified from the NICOR databases. Hospital admissions with a primary diagnosis of IE were identified by linkage with the NHS Hospital Episode Statistics database. Approval was obtained from the NHS Research Ethics Committee.

Results

2057 of 91 962 patients undergoing SAVR developed IE over a median follow-up of 53.9 months—an overall incidence of 4.81 [95% CI 4.61 to 5.03] per 1000 person-years. Correspondingly, 140 of 14 195 patients undergoing TAVI developed IE over a median follow-up of 24.5 months—an overall incidence of 3.57 [95% CI 3.00 to 4.21] per 1000 person-years. The cumulative incidence of IE at 60 months was higher after SAVR than after TAVI (2.4% [95% CI 2.3 to 2.5] vs 1.5% [95% CI 1.3 to 1.8], HR 1.60, p<0.001). Across the entire cohort, SAVR remained an independent predictor of IE after multivariable adjustment. Risk factors for IE included younger age, male sex, atrial fibrillation, and dialysis.

Conclusions

IE is a rare complication of SAVR and TAVI. In our population, the incidence of IE was higher after SAVR than after TAVI.

Polyphenols could be Effective in Exerting a Disinfectant-Like Action on Bioprosthetic Heart Valves, Counteracting Bacterial Adhesiveness

BACKGROUND

The incidence of infective endocarditis in patients with bioprosthetic heart valves is over 100 times that of the general population with S. aureus recognized as the causative organism in approximately 1/3 of cases. In this study, (1) the microbicidal and virucidal effect of a polyphenolic solution was carefully evaluated. The same solution was then adopted for the treatment of a commercial bioprosthetic heart valve model for (2) the assessment of inhibition of S. aureus adhesiveness.

METHODS

(1) the viability of 9 microorganisms strains (colony-forming units) and the infectivity degree of 3 viral strains (cellular infection capacity) were evaluated after suspension in the polyphenolic solution. (2) Leaflets from a treated and untreated commercial surgical valve model were incubated with a known concentration of S. aureus. After incubation, the leaflets were homogenized and placed in specific culture media to quantify the bacterial load.

RESULTS

(1) The polyphenolic solution proved to be effective in eliminating microorganisms strains guaranteeing the killing of at least 99.9%. The effectiveness is particularly relevant against M. chelonae (99.999%). (2) The polyphenol-based treatment resulted in the inhibition of the S. aureus adhesiveness by 96% concerning untreated samples.

CONCLUSIONS

The data suggest an interesting protective effect against infections and bacterial adhesiveness by a polyphenolic-based solution. Further studies will plan to extend the panel of microorganisms for the evaluation of the anti-adhesive effect; however, the use of optimized polyphenolic blends could lead to the development of new treatments capable to make transcatheter-valve substitutes more resistant to infection.

Trends in prophylactic antibiotic use for tooth extraction from 2015 to 2018 in Japan: An analysis using a health insurance claims database

INTRODUCTION

To describe patterns in antibiotic prophylaxis for tooth extraction following the 2016 Japanese National Action Plan on Antimicrobial Resistance.

METHODS

Using a health insurance claims database, we retrospectively identified tooth extraction visits by patients aged ≥18 years from September 2015 to August 2018 and classified patients as undergoing extraction of a fully impacted or horizontally impacted mandibular wisdom tooth, being at risk of infective endocarditis or surgical site infection, or being at low risk. Antibiotic use and type of antibiotics prescribed on the day of tooth extraction were evaluated across the study period, with stratification by tooth extraction category and facility type (hospital or dental clinic).

RESULTS

We identified 662,435 patients with tooth extraction. The mean age was 42.7 years, and 57% were male. Twelve percent underwent wisdom tooth extraction, 32% were high risk, and 10% visited hospitals. The proportion of antibiotic use was 83% overall and 82% among low-risk patients. This proportion remained similar throughout the study period. A shift from third-generation cephalosporins to amoxicillin was observed from 2015 to 2018: the proportion prescribed third-generation cephalosporins decreased from 58% to 34% in hospitals and from 57% to 56% in clinics, and the proportion prescribed amoxicillin increased from 16% to 37% in hospitals and from 6% to 10% in clinics.

CONCLUSIONS

The pattern of prophylactic antibiotic use for tooth extraction gradually changed after the initiation of the National Action Plan. Further efforts are required to reduce potentially inappropriate prescriptions for low-risk patients, especially in dental clinics.

Adapted from: Prevention of Viridans Group Streptococcal Infective Endocarditis: A Scientific Statement From the American Heart Association

BACKGROUND

In 2007, the American Heart Association published updated evidence-based guidelines on the recommended use of antibiotic prophylaxis to prevent viridans group streptococcal (VGS) infective endocarditis (IE) in cardiac patients undergoing invasive procedures. The 2007 guidelines significantly scaled back the underlying conditions for which antibiotic prophylaxis was recommended, leaving only 4 categories thought to confer the highest risk of adverse outcome. The purpose of this update is to examine interval evidence of the acceptance and impact of the 2007 recommendations on VGS IE and, if needed, to make revisions based on this evidence.

METHODS AND RESULTS

A writing group was formed consisting of experts in prevention and treatment of infective endocarditis including members of the American Dental Association, the Infectious Diseases Society of America, and the American Academy of Pediatrics, in addition to the American Heart Association. MEDLINE database searches were done for English language articles on compliance with the recommendations in the 2007 guidelines and the frequency of and morbidity or mortality from VGS IE after publication of the 2007 guidelines. Overall, there was good general awareness of the 2007 guidelines but variable compliance with recommendations. There was no convincing evidence that VGS IE frequency, morbidity, or mortality has increased since 2007.

CONCLUSIONS

On the basis of a review of the available evidence, there are no recommended changes to the 2007 VGS IE prevention guidelines. We continue to recommend VGS IE prophylaxis only for categories of patients at highest risk for adverse outcome while emphasizing the critical role of good oral health and regular access to dental care for all. Randomized controlled studies to determine whether antibiotic prophylaxis is effective against VGS IE are needed to further refine recommendations.

Infektiöse Endokarditis bei Erwachsenen mit angeborenen Herzfehlern

Erwachsene Patienten mit angeborenen Herzfehlern (EMAH) sind eine größer werdende Patientengruppe, die eine lebenslange Begleitung und Behandlung benötigt. Eine der wichtigsten Komplikationen bei EMAH-Patienten ist die infektiöse Endokarditis.

Die Echokardiografie hat sowohl bei der Diagnosesicherung als auch beim Erkennen von Komplikationen und im Follow-up eine ganz zentrale Bedeutung. Computer- und Positronenemissionstomografie werden zur Beurteilung von implantierten Fremdmaterial zunehmend eingesetzt. Eine antibiotische Therapie erfolgt zunächst empirisch und später auf den individuellen Erreger zugeschnitten. Zurzeit wird die Antibiotikaprophylaxe nur den Patienten mit deutlich erhöhtem Endokarditisrisiko vor den zahnärztlichen Eingriffen mit dem höchsten Risiko empfohlen.

Nomogram based on neutrophil-to-platelet ratio to predict in-hospital mortality in infective endocarditis

Aim: To develop a nomogram based on neutrophil-to-platelet ratio (NPR) to predict in-hospital mortality in infective endocarditis (IE) patients. Methods: We retrospectively analyzed 294 consecutive patients classified as survivors or nonsurvivors according to hospitalization outcome. Logistic regression analyses were performed to identify independent predictors for in-hospital mortality. A nomogram based on them was established and assessed by receiver operating characteristic (ROC) curve analysis. Results: Admission NPR (odds ratio [OR] = 1.095, 95% CI: 1.037-1.156), positive blood culture (OR = 9.220; 95% CI: 1.478-57.521) and left-sided endocarditis (OR = 5.099; 95% CI: 1.104-23.553) independently predicted in-hospital mortality in IE. The area under the ROC curve for the nomogram based on these predictors was 0.832. Conclusion: The nomogram based on NPR could be used for early risk stratification of IE patients.

18F-FDG-Uptake in Mediastinal Lymph Nodes in Suspected Prosthetic Valve Endocarditis: Predictor or Confounder?

Introduction: Prosthetic valve endocarditis (PVE) is a serious disease affecting ~0.4% of prosthetic valve recipients per year. ¹⁸F-FDG-PET/CT has high sensitivity and specificity for PVE and is included as major criterion for the diagnosis in recent guidelines of the European Society of Cardiology. We addressed the question whether increased FDG-uptake in mediastinal lymph nodes could help to support the visual diagnostic assessment of PVE. Methods: In this sub-analysis of a previously published retrospective multicentre study, 160 unique patients were identified who underwent ¹⁸F-FDG-PET/CT for evaluation of suspected PVE. ¹⁸F-FDG-PET/CT was performed in adherence to the European Association of Nuclear Medicine guidelines of 2015 and scans were assessed for signs of mediastinal lymph node activity by 2 experienced nuclear medicine physicians who were blinded to clinical context. Clinical diagnosis of PVE had been established based on surgical findings or multidisciplinary consensus after a 1-year follow-up in 80 of 160 patients (50%). Results: In total, 52 patients showed increased mediastinal lymph node activity. Mediastinal lymph node activity on ¹⁸F-FDG-PET/CT did not increase diagnostic accuracy when added to the visual analysis of scans for signs of PVE: X ²: 0.118, p = 0.731). After excluding patients with known confounders for ¹⁸F-FDG-PET/CT, namely use of Bioglue® during prosthetic valve implantation and C-reactive protein levels below 40 mg/L, mediastinal lymph node activity was still not of additional diagnostic value compared to visual analysis alone (X²:0.129, p = 0.723). Discussion: Assessment of mediastinal lymph node activity did not improve ¹⁸F-FDG-PET/CT diagnostic accuracy for suspected PVE compared to visual assessment of the valve alone, as it seems to be a rather a specific finding, that might be caused by sternal wound or mediastinal infections or even by subclinical respiratory infections. Future studies might elucidate whether increased FDG active lymph nodes indicate a high-risk patient group and whether more detailed assessment of mediastinal lymph nodes could improve their additional diagnostic benefit.

Demographic, cardiological, microbiologic, and dental profiles of Brazilian patients who developed oral bacteria-related endocarditis

OBJECTIVE

Infective endocarditis (IE) may cause devastating complications with high morbidity and mortality rates. The aim of the present study was to study the demographic, cardiological, microbiologic, and dental profiles of patients with oral bacteria-related IE.

STUDY DESIGN

We present a retrospective study of patients with oral bacteria-related IE treated at Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de Sao Paulo, Brazil, between January 2009 and December 2019.

RESULTS

Of the 100 patients included, 70% were male with a mean age of 45.4 years at diagnosis. The most affected sites were aortic and mitral valves, 60% in prosthetic heart valves, 34% in native valves, and 3% in pacemakers. The most common cause of valvular disease was rheumatic cardiopathy (51.9%), and the most frequent complications were valvular and perivalvular damage (26%). Streptococcus viridans was the most common species (96%), dental caries were present in 57% of the patients, 78% had tooth loss, 45% had apical periodontitis, and 77% were at high/moderate risk for periodontal disease.

CONCLUSION

Oral bacteria-related IE among Brazilians was predominant in the prosthetic heart valves of young male adults previously affected by rheumatic cardiopathy. Streptococcus viridans was the main cause of IE, which was linked to patients with a poor oral health status.

Multicenter Study of Endocarditis After Transcatheter Pulmonary Valve Replacement

BACKGROUND

Endocarditis has emerged as one of the most impactful adverse events after transcatheter pulmonary valve replacement (TPVR), but there is limited information about risk factors for and outcomes of this complication.

OBJECTIVES

The purpose of this study was to evaluate risk factors for and outcomes of endocarditis in a large multicenter cohort.

METHODS

The authors established an international registry focused on characterizing endocarditis after TPVR, including the incidence, risk factors, characteristics, and outcomes.

RESULTS

Investigators submitted data for 2,476 patients who underwent TPVR between July 2005 and March 2020 and were followed for 8,475 patient-years. In total, 182 patients were diagnosed with endocarditis a median of 2.7 years after TPVR, for a cumulative incidence of 9.5% (95% CI: 7.9%-11.1%) at 5 years and 16.9% (95% CI: 14.2%-19.8%) at 8 years (accounting for competing risks: death, heart transplant, and explant) and an annualized incidence of 2.2 per 100 patient-years. Staphylococcus aureus and Viridans group Streptococcus species together accounted for 56% of cases. Multivariable analysis confirmed that younger age, a previous history of endocarditis, and a higher residual gradient were risk factors for endocarditis, but transcatheter pulmonary valve type was not. Overall, right ventricular outflow tract (RVOT) reintervention was less often to treat endocarditis than for other reasons, but valve explant was more often caused by endocarditis. Endocarditis was severe in 44% of patients, and 12 patients (6.6%) died, nearly all of whom were infected with Staphylococcus aureus.

CONCLUSIONS

The incidence of endocarditis in this multicenter registry was constant over time and consistent with prior smaller studies. The findings of this study, along with ongoing efforts to understand and mitigate risk, will be critical to improve the lifetime management of patients with heart disease involving the RVOT. Although endocarditis can be a serious adverse outcome, TPVR remains an important tool in the management of RVOT dysfunction.

Short- and long-term outcomes of infective endocarditis admission in adults: A population-based registry study in Finland

Infective endocarditis (IE) is associated with high mortality. However, data on factors associated with length of stay (LOS) in hospital due to IE are scarce. In addition, long-term mortality of more than 1 year is inadequately known. In this large population-based study we investigated age and sex differences, temporal trends, and factors affecting the LOS in patients with IE and in-hospital, 1-year, 5-year and 10-year mortality of IE. Data on patients (≥18 years of age) admitted to hospital due to IE in Finland during 2005–2014 were collected retrospectively from nationwide obligatory registries. We included 2166 patients in our study. Of the patients 67.8% were men. Women were older than men (mean age 63.3 vs. 59.5, p<0.001). The median LOS was 20.0 days in men and 18.0 in women, p = 0.015. In the youngest patients (18–39 years) the median LOS was significantly longer than in the oldest patients (≥80 years) (24.0 vs. 16.0 days, p = 0.014). In-hospital mortality was 10% with no difference between men and women. Mortality was 22.7% at 1 year whereas 5- and 10-year mortality was 37.5% and 48.5%, respectively. The 5-year and 10-year mortality was higher in women (HR 1.18, p = 0.034; HR 1.18, p = 0.021). Both in-hospital and long-term mortality increased significantly with aging and comorbidity burden. Both mortality and LOS remained stable over the study period. In conclusion, men had longer hospital stays due to IE compared to women. The 5- and 10-year mortality was higher in women. The mortality of IE or LOS did not change over time.

Cost-effectiveness analysis of screening for first-degree relatives of patients with bicuspid aortic valve

AIMS

Bicuspid aortic valve (BAV) is the commonest congenital heart valve malformation, and is associated with life-threatening complications. Given the high heritability index of BAV, many experts recommend echocardiography screening for first-degree relatives (FDRs) of an index case. Here we aim to evaluate the cost-effectiveness of such cascade screening for BAV.

METHODS

Using a decision-analytic model, we performed a cost-effectiveness analysis of echocardiographic screening for FDRs of BAV index case. Data on BAV probabilities and complications among FDRs were derived from our institution's BAV familial cohort and from the literature on population-based BAV cohorts with long-term follow-up. Health gain was measured as quality-adjusted life years (QALYs). Cost inputs were based on list prices and literature data. One-way and probabilistic sensitivity analyses were performed to account for uncertainty in the model's variables.

RESULTS

Screening of FDRs was found to be the dominant strategy, being more effective and less costly than no screening, with savings of €644 and gains of 0.3 QALYs. Results were sensitive throughout the rang of the model's variables, including the full range of reported BAV rates among FDRs across the literature. A gradual decrease of the incremental effect was found with the increase in screening age.

CONCLUSIONS

This economic evaluation model found that echocardiographic screening of FDRs of BAV index case is not only clinically important but also cost-effective and cost-saving. Sensitivity analysis supported the model's robustness, suggesting its generalization.