Survey of prophylaxis and management of infective endocarditis in patients with congenital heart disease: Japanese nationwide survey

Assessment of pathogenesis of infective endocarditis by plasma IgG antibody titer test against periodontal bacteria

Oral bacteria cause infective endocarditis (IE), so severe periodontitis is thought to be high risk for IE. We suggest the identification of high-risk patients by an IgG antibody titer test against periodontal bacteria might become common screening test.

Infective endocarditis in congenital heart disease: a frequent community-acquired complication

BACKGROUND

Infective endocarditis (IE) is a severe complication in patients with congenital heart disease (CHD). Epidemiology, etiology, and outcome in this group are different to those of patients with acquired heart disease.

METHODS

We reviewed all cases of proven and probable IE (Duke's criteria) diagnosed in our center during the last two decades.

RESULTS

We observed 45 cases of IE in patients with CHD (age range 8 months to 35 years); these represented 5.5 % of all the episodes of IE in our institution during the study period. The most frequent CHD were ventricular septal defect (31 %), tetralogy of Fallot (19 %), and atrioventricular septal defect (11 %). Twenty cases of IE (44 %) were recorded in patients with non-corrected native-valve CHD. Of the 24 patients with prosthetic-valve IE, post-operative acquisition during the first 6 months was confirmed in 11 patients (range 4-110 days). IE was community-acquired in 62 % of cases. Streptococcus spp. were the most frequent etiologic agents (33 %), followed by Staphylococcus spp. (32 %). Surgery was required to treat IE in 47 % of patients (52 % in prosthetic-valve IE and 41 % in native-valve IE, p = ns). In comparison to native-valve IE, prosthetic-valve IE was significantly more nosocomial-acquired (61 vs. 14 %, p = 0.002), presented a higher heart failure rate at diagnosis (39 vs. 9 %, p = 0.035), and developed more breakthrough bacteremia episodes (19 vs. 0 %, p = 0.048). Global mortality was 24 % (75 % in patients with prosthetic-valve IE who required surgery and 0 % in patients with native-valve IE who required surgery, p = 0.001). Multivariate analysis excluding breakthrough bacteremia (100 % mortality in this condition) confirmed that nosocomial IE [odds ratio (OR), 23.7; 95 % confidence interval (CI), 2.3-239.9] and the presence of heart failure at diagnosis of IE (OR, 25.9; 95 % CI, 2.5-269.6) were independent factors associated with mortality.

CONCLUSION

Half of all cases of IE in patients with CHD occurred in patients with non-corrected native-valve CHD and two-thirds were community-acquired. Streptococcus spp. were the most frequent etiological agents. Patients with prosthetic-valve IE present a worse outcome, especially those requiring surgery. Breakthrough bacteremia, nosocomial IE, and heart failure are independent factors of mortality in patients with CHD presenting IE.

The impact of 2007 infective endocarditis prophylaxis guidelines on the practice of congenital heart disease specialists

BACKGROUND

the impact of the 2007 American Heart Association endocarditis prophylaxis guidelines on clinician practice has not been well established. Our objective was to evaluate how the American Heart Association endocarditis guidelines changed the practice of cardiologists who manage congenital heart disease and to ascertain the degree of practice variation among cardiologists.

METHODS

a cross-sectional Web-based survey was e-mailed to Canadian (n = 134), Australian (n = 33), New Zealand (n = 9), and a random sample of American (n = 250) pediatric and adult congenital heart disease cardiologists in 2008. Nonrespondents received the survey 4 times by e-mail and once by regular post.

RESULTS

the response rate was 55%. The lesions for which cardiologists were most evenly divided between recommending versus not recommending prophylaxis were "rheumatic mitral stenosis of moderate severity" (45% recommended prophylaxis) and "perimembranous ventricular septal defect (VSD) status post surgical patch closure with no residual shunt 3 months post-operatively" (54% recommended prophylaxis). The lesions for which the greatest proportion of cardiologists discontinued prophylaxis were "small muscular VSD, no previous endocarditis" (80% discontinued prophylaxis) and "small audible patent ductus arteriosus" (83% discontinued prophylaxis). Only 69% recommended prophylaxis for "VSD s/p surgical patch closure with small residual shunt" despite current guidelines recommending prophylaxis for this scenario. Twenty-eight percent of respondents felt that the new guidelines leave some patients at risk, and 6% would not recounsel any low-risk patients following these guidelines.

CONCLUSIONS

the 2007 guidelines have resulted in a substantial change in endocarditis prophylaxis. There remains considerable heterogeneity among cardiologists regarding the prophylaxis of certain cardiac lesions.

Infective endocarditis after body art: a review of the literature and concerns

PURPOSE

Infective endocarditis (IE) is a rare but dangerous complication of tattooing and body piercing in adolescents and young adults 15-30 years of age, with and without congenital heart disease (CHD). Because body art, including tattooing and piercing, is increasing and IE cases continue to be reported in the literature, a longitudinal assessment of IE and body art cases is important to examine for trends.

METHODS

A 22-year (1985-2007) longitudinal electronic Medline and Scopus review of all published cases of IE and body art was conducted.

RESULTS

In all, 22 specific cases of IE spanning 1991-2007 have been reported that were associated with piercing the tongue (seven), ear lobes (six), navel (five), lip (one), nose (one), and nipple (one), and reported in one heavily tattooed person; other general IE cases have also been mentioned. Twelve cases were in females, and one patient died; nine of these individuals had CHD. Twenty-one cases have been published in the 10 years from 1997-2007.

CONCLUSIONS

Although there is no denominator to assess the real risk, this review provides more evidence of IE and body art concerns, and should stimulate further discussion regarding IE antibiotic prophylaxis. It is believed that IE is triggered by normal flora at the body art site, microorganism colonization around the jewelry, or by a localized site infection that stimulates episodes of transient bacteremia (commonly caused by staphylococi) and then seeds various areas of the heart. Frequently in such cases the mitral or aortic valves need to be replaced. For individuals with CHD who want body art, prophylactic antibiotic regimens have been suggested since 1999. Millions of tattoos and body piercings are done yearly, and more IE cases are therefore suspected. An international electronic repository of body art complications would provide better documentation. Body art procurement for many persons in this age group is a matter of "when, not if"; thus proactive, frequent, targeted educational strategies for adolescents and artists practicing body art are suggested.

Interventions using foreign material to treat congenital heart disease in children increase the risk for infective endocarditis

BACKGROUND

Congenital heart disease (CHD) is a risk factor for infective endocarditis (IE). We aimed to assess the impact of cardiac interventions on the frequency and microbial profile of IE in children with CHD.

METHODS

Episodes of IE were analyzed in children aged < or =18 years with CHD between 1995 and 2005 with respect to cardiac surgery or catheter interventions with or without implantation of foreign material.

RESULTS

Diagnosis of IE was made in 14 (0.36%) of 3826 children with CHD including native IE in 6 and postinterventional IE in 8 patients. During the period 3029 cardiac interventions (1944 surgeries; 1085 catheters) were performed; foreign material was implanted in 1360 interventions (1139 surgeries; 221 catheters) including all 8 patients with postinterventional IE. Cardiac intervention by itself did not change the risk for IE compared with no intervention. The risk of IE after implantation of foreign material was higher than following intervention without implantation (odds ratio, 21.0; 95% confidence interval, 1.2-365; P < 0.05). Pacemaker implantation was associated with the highest risk for IE (odds ratio, 11.0; 95% confidence interval, 2.6-46.5; P < 0.001). Staphylococci were the most frequently isolated organisms in foreign material-associated IE.

CONCLUSIONS

Cardiac intervention in children with CHD does not increase the risk for IE. Postinterventional IE in children with CHD is strongly linked to implantation of foreign material, especially of pacemaker.

Experimental infective endocarditis induced by human supragingival dental plaque in rats

Human dental plaque is thought to contribute to disease, not only in the oral cavity but also at other body sites. To investigate the pathogenicity of dental plaque in tissues remote from the mouth, we examined the ability of human supragingival dental plaque to induce infective endocarditis (IE) in rats. In total, 15 out of 27 catheterized rats survived after intravenous injections with human supragingival dental plaque suspensions containing 3 x 10(6) colony-forming units (CFU) of bacterial cells. In surviving rats, infected vegetations were formed in all except one rat. The microbial composition of the infected vegetations was different from that of the respective dental plaque inocula, with Streptococcus oralis comprising the majority of the isolates. In rats affected with endocarditis, the aortic sinus was filled with fibrinous vegetation containing bacteria. Inflammatory cells infiltrated the aortic valve, the aorta adjacent to the valve, and the cardiac muscles. The inoculation of catheterized rats with a cell suspension of S. oralis isolate (5 x 10(6) CFU) was not lethal but capable of inducing endocarditis in all animals. The results suggest that if dental plaque were introduced into the bloodstream, it could serve as a potent source of bacteria causing IE in humans.

Poor implementation of cardiac rehabilitation despite broad dissemination of coronary interventions for acute myocardial infarction in Japan: a nationwide survey

BACKGROUND

The implementation of cardiac rehabilitation (CR) after acute myocardial infarction (AMI) has not been fully investigated in Japan, so a nationwide survey of hospitals was conducted.

METHODS AND RESULTS

Questionnaires were sent in 2004 to a total of 1,875 hospitals in Japan, including all the 859 Japanese Circulation Society (JCS)-authorized cardiology-training hospitals (THs), 311 JCS-associated hospitals (AH), and 705 randomly sampled non-THs (NTHs). The response rate was 59% (1,106/1,875). The percentages of hospitals treating hospitalized AMI patients were 97% in 526 TH, 85% in 194 AH, and 20% in 339 NTH. Although the rates of implementation of emergency percutaneous coronary intervention were very high (92%, 56%, and 4%, respectively), the rates of implementation of recovery phase CR were low (20%, 8%, and 2%, respectively). In addition, patient education programs (23%, 13% and 2%) and formulated exercise prescriptions based on exercise testing (16%, 7% and 1%) were poorly implemented. More importantly, only 9%, 2% and 0% of these hospitals had outpatient CR programs. From these data, the nationwide participation rate in outpatient CR after AMI in Japan was estimated to be only 3.8-7.6%.

CONCLUSION

This first nationwide survey demonstrated that, in contrast to the broad dissemination of acute phase invasive treatment for AMI, the implementation of recovery phase CR, especially outpatient CR, is extremely poor in Japan. In addition, patient education programs and exercise prescription based on exercise testing are only poorly implemented.

Results of surgical treatment for infective endocarditis in children

OBJECTIVE

Infective endocarditis is uncommon condition, with a high degree of morbidity and mortality. It is less common in children, albeit tending to be associated with congenital cardiac malformations. We describe our experience of the need for surgical treatment in children with infective endocarditis.

PATIENTS AND METHODS

We analyzed retrospectively the records of 9 children aged below 16 years seen between May 2003 and March 2005 with infective endocarditis, reviewing the demographic details, clinical presentation, microbiological and echocardiographic data, operative findings, and outcome.

RESULTS

Apart from pre-existing renal insufficiency in 1 patient, congenital cardiac malformations were the predisposing factors. Blood cultures were positive in 3, but remained negative in the other 6 patients. The indications for surgical treatment included uncontrolled sepsis, congestive heart failure, recurrent endocarditis, patch or graft dehiscence, and pseudoaneursymal formation. Death due to uncontrolled sepsis resulting in multiorgan failure occurred in 1 patient, who had tetralogy of Fallot with pulmonary atresia and major aortopulmonary collateral arteries. Another patient died late postoperatively due to cardiac failure after relapse of the endocarditis in the setting of negative blood cultures.

CONCLUSION

Despite advances in antimicrobial therapy, diagnosis, and measures of treatment for infective endocarditis, complications continue to be responsible for substantial morbidity and mortality. Since blood cultures are frequently negative, clinical and echocardiographic findings should be the major determinants of strategies used for treatment. We believe that our small series of patients seen over the past two years in which surgical treatment was performed will be helpful in guiding the clinical perspectives for children with infective endocarditis.

Streptococcus viridans endocarditis from tongue piercing

Body piercing and tattooing have undergone a revival in popularity. We present the case of a 27-year-old man with a recent tongue piercing and infective endocarditis of the aortic valve. He was treated with a 6-week course of intravenous antibiotics, but eventually required a Ross procedure for progressive aortic insufficiency.

Infective endocarditis in congenital heart disease: Japanese national collaboration study

OBJECTIVE

To provide pure cohorts of paediatric and adult patients with congenital heart disease (CHD) and infective endocarditis (IE) for making future guidelines.

DESIGN

Japanese nationwide survey.

SETTING

66 Japanese institutions.

PATIENTS

170 children, mean (SD) age 7.4 (5.7) years (range 14 days to 17 years), and 69 adults, age 32.5 (14.1) years (range 18-69) who developed IE between 1997 and 2001 (one in 240 admissions with CHD).

MAIN OUTCOME MEASURES

Clinical presentation of IE.

RESULTS

119 patients including 88 with cyanotic CHD had previous cardiac surgery. Procedures preceding IE were dental (12%) followed by cardiovascular surgery (8%). Sites of infection were left sided in 46% and right sided in 51%. Vegetation with diameter of 11 mm was documented in 151 (63%). Frequent complications were embolic events (stroke 11%, other emboli 20%) and cardiac failure (23%). The most common microorganisms were streptococci (50%) and staphylococci (37%) with methicillin resistant Staphylococcus aureus in 7.5%. Empirical treatments were penicillins (alone or with other antibiotics 57%) followed by cephems (22%) and vancomycin (11%). Surgery during active IE was common (26%), with vegetation (45%) and heart failure (29%) as the most frequent indications. Mortality was 8.8%: 8.0% among patients who received medical treatment alone and 11.1% among those with active IE who underwent surgery. The causes of death (n = 21) were surgery (7), infection (7), cardiac failure (6), and renal failure (1).

CONCLUSIONS

Because of a recent increase in the incidence of IE and high mortality and complication rate, it is mandatory to establish well formulated recommendations for management of IE in paediatric and adult patients with CHD based on a large cohort. Results of this nationwide multicentre database should be helpful in establishing guidelines.

Causative Organism Influences Clinical Profile and Outcome of Infective Endocarditis in Pediatric Patients and Adults With Congenital Heart Disease

BACKGROUND

Studies on microorganisms in a large cohort of patients with congenital heart disease (CHD) and infective endocarditis (IE) are rare. Using a nationwide survey, the relationship between causative microorganisms and clinical profiles in patients with CHD and IE was investigated.

METHODS AND RESULTS

Data from 188 patients with CHD (pediatric patients (n=113), mean age, 6.2+/-4.9 years; adult patients (n=75), mean age 28.4+/-13.4 years) and IE from 60 institutions were analyzed. Causative microorganisms were Streptococcus species (94:50.0%), Staphylococcus species (68:36.2%), Haemophilus species (9:4.8%), Candida (5:2.7%), Pseudomonas species (4:2.1%) and other unclassified microorganisms (8:4.3%). Staphylococcal IE was observed significantly higher in perioperative IE (11/16), in cyanotic patients (32/73) and patients younger than 1 year old (11/16). Streptococcal IE was observed significantly higher in acyanotic patients (64/109) and patients aged 16 years or older (48/75). Total mortality was 20/188 (10.6%) and was high for candidial (2/5; 40%) and pseudomonal IE (2/4; 50%). Mortality was highly associated with younger age, especially infants (5/16), and methicillin-resistant staphylococcal IE (6/15).

CONCLUSIONS

The causative microorganisms are significantly related to the clinical profile and outcome in patients with IE and CHD. These results form the basis for selecting appropriate antibiotics for prevention and management.