Demographic and Regional Trends of Infective Endocarditis-Related Mortality in the United States, 1999 to 2019

Pathogenic spectrum of infective endocarditis and analysis of prognostic risk factors following surgical treatment in a tertiary hospital in China

BACKGROUND

This study aimed to summarize the pathogenic spectrum of infective endocarditis (IE) and analyze the risk factors for poor prognosis in surgical patients in a tertiary hospital in China.

METHODS

We retrospectively included patients diagnosed with IE between January 2013 and January 2022. The pathogenic spectrum was summarized; the risk factors for early postoperative mortality and embolic events were analyzed using multivariate logistic regression.

RESULTS

Among 630 patients who underwent blood cultures, the positivity rate was 56.83%. The most prevalent pathogens were viridans streptococci, Staphylococcus aureus, enterococci, and coagulase-negative staphylococci (CoNS). The prevalence of viridans streptococci significantly increased in the surgically treated group, compared to the medically treated group (50.80% vs. 27.78%, P < 0.001), while that of CoNS decreased (5.60% vs. 12.04%, P = 0.034). There has been a declining trend in the blood culture positivity in recent years compared to earlier years (2018-2022 vs. 2013-2017 = 60.95% vs. 47.30%, P = 0.037), with an increasing trend in viridans streptococci and a decreasing trend in CoNS. Multivariate logistic regression analysis identified male gender, coronary artery disease, platelet count < 100 × 109/L, albumin < 35 g/L, elevated creatinine, and prosthetic valve as independent risk factors for early postoperative mortality. Risk factors for embolic events included recent cerebral infarction within 3 months, history of peripheral vasculopathy, and hemoglobin (Hb) < 90 g/L.

CONCLUSIONS

Viridans streptococci predominates as the most common IE pathogen, with its incidence rising recently, especially among surgical patients. Blood culture positivity is decreasing. Understanding risk factors for early postoperative mortality and embolic events is crucial for optimizing patient management and prognosis.

CLINICAL TRIAL NUMBER

Not applicable.

The Forensic Perspective of Infectious Endocarditis: A Retrospective Study With Recommendations for the Future

Increasing rates of infectious endocarditis (IE) are well-described in the United States and worldwide, yet forensic literature regarding IE is sparse. Autopsy databases may help identify subsets of patients at increased risk of mortality. We reviewed all deaths due to IE in our office between 2010 and 2022 (with full autopsy performed) and found 29. The average age was 44 years. Manners of death included natural (69%), accident (28%), and homicide (3%). For all accidental deaths, acute intoxication was included in either part I or II. The aortic valve was most affected (62%), followed by tricuspid (28%) and mitral (24%). Seventy-six percent of affected valves were native, and 24% were prosthetic. Common risk factors included intravenous drug use (48%) and chronic ethanolism (21%). No sustained increase in deaths due to IE was identified. These data show marked differences from clinical literature, including a lower average age and higher incidence of substance use disorders, and it is unlikely selection bias is the sole reason. There was inconsistency in death certification, most notably by not including pertinent IE risk factors. Improving consistency and quality of IE death certification will aid in detecting regional trends and assist multi-institutional collaboration efforts.

Infective Endocarditis Among Women Who Inject Drugs

Importance

In the US and Canada, women comprise approximately one-third of people who inject drugs (PWID); however, clinical characteristics and outcomes of injection drug use complications in women are poorly described.

Objective

To identify clinical characteristics and outcomes of infective endocarditis (IE) among women who inject drugs (WWID).

Design, Setting, and Participants

This is a retrospective cohort study of PWID with definite IE (per 2023 Duke-International Society for Cardiovascular Infectious Diseases criteria) admitted from April 5, 2007, to March 15, 2018, at 5 tertiary-care hospitals in London, Ontario, and Regina, Saskatchewan, Canada. Data were analyzed from June 1, 2023, to August 2, 2024. Descriptive analyses were conducted for baseline characteristics at index hospitalization and stratified by sex.

Main Outcomes and Measures

The primary outcome was the difference in 5-year survival between female and male PWID with IE. The secondary outcome was 1-year survival. Multivariable time-dependent Cox proportional hazards regression analyses were conducted for variables of clinical importance to evaluate 5-year mortality.

Results

Of 430 PWID with IE, 220 (51.2%) were women; of 332 non-PWID with IE, 101 (30.4%) were women. WWID with IE were younger than men (median [IQR] age, 31.5 [27.0-38.5] vs 38.5 [31.0-49.0] years), and 11 of 220 (5.0%) were pregnant at index hospitalization, although only 12 of 220 (5.5%) had contraceptive use documented. Women had a larger proportion of right-sided IE than men (158 of 220 women [71.8%] vs 113 of 210 men [53.8%]). WWID living in urban areas had higher mortality than WWID in rural areas (adjusted hazard ratio [aHR], 2.70; 95% CI, 1.15-6.34; P = .02). Overall mortality was lower among PWID referred for substance use disorder counseling in centers with inpatient services compared with centers with only outpatient referrals (aHR, 0.29; 95% CI, 0.17-0.51; P < .001). Overall mortality was lower with right-sided heart disease for both women (aHR, 0.44; 95% CI, 0.27-0.71; P < .001) and men (aHR, 0.22; 95% CI, 0.10-0.50; P < .001) and was higher with congestive heart failure for both women (aHR, 2.32; 95% CI, 1.29-4.18; P = .005) and men (aHR, 1.73; 95% CI, 1.07-2.79; P = .02).

Conclusions and Relevance

In this cohort of PWID with IE, women were overrepresented. Reasons for women's disproportionately high IE incidence need further study. Inpatient substance use disorder services, contraception counseling, and enhanced social support for WWID living in urban areas need to be prioritized.

Echocardiographic predictors and associated outcomes of multiple vegetations in infective endocarditis: A pilot study

BACKGROUND

Infective endocarditis (IE) is a life-threatening infection with an annual mortality of 40%. Embolic events reported in up to 80% of patients. Vegetations of > 10 mm size are associated with increased embolic events and poor prognosis. There is a paucity of literature on the association of multiple vegetations with outcome.

AIM

To study the echocardiographic (ECHO) features and outcomes associated with the presence of multiple vegetations.

METHODS

In this retrospective, single-center, cohort study patients diagnosed with IE were recruited from June 2017 to June 2019. A total of 84 patients were diagnosed to have IE, of whom 67 with vegetation were identified. Baseline demographic, clinical, laboratory, and ECHO parameters were reviewed. Outcomes that were studied included recurrent admission, embolic phenomenon, and mortality.

RESULTS

Twenty-three (34%) patients were noted to have multiple vegetations, 13 (56.5%) were male and 10 (43.5%) were female. The mean age of these patients was 50. Eight (35%) had a prior episode of IE. ECHO features of moderate to severe valvular regurgitation [odds ratio (OR) = 4], presence of pacemaker lead (OR = 4.8), impaired left ventricle (LV) relaxation (OR = 4), and elevated pulmonary artery systolic pressure (PASP) (OR = 2.2) are associated with higher odds of multiple vegetations. Of these moderate to severe valvular regurgitation (P = 0.028), pacemaker lead (P = 0.039) and impaired relaxation (P = 0.028) were statistically significant. These patients were noted to have an increased association of recurrent admissions (OR = 3.6), recurrent bacteremia (OR = 2.4), embolic phenomenon (OR = 2.5), intensive care unit stay (OR = 2.8), hypotension (OR = 2.1), surgical intervention (OR = 2.8) and device removal (OR = 4.8). Of this device removal (P = 0.039) and recurrent admissions (P = 0.017) were statistically significant.

CONCLUSION

This study highlights the associations of ECHO predictors and outcomes in patients with IE having multiple vegetations. ECHO features of moderate to severe regurgitation, presence of pacemaker lead, impaired LV relaxation, and elevated PASP and outcomes including recurrent admissions and device removal were found to be associated with multiple vegetations.

Recent Insights Into Native Valve Infective Endocarditis: JACC Focus Seminar 4/4

This focused review highlights the latest issues in native valve infective endocarditis. Native valve disease moderately increases the risk of developing infective endocarditis. In 2023, new diagnostic criteria were published by the Duke-International Society of Cardiovascular Infectious Diseases group. New pathogens were designated as typical, and findings on computed tomography imaging were included as diagnostic criteria. It is now recognized that a multidisciplinary approach to care is vital, and the role of an "endocarditis team" is highlighted. Recent studies have suggested that a transition from intravenous to oral antibiotics in selected patients may be reasonable, and the role of long-acting antibiotics is discussed. It is also now clear that an aggressive surgical approach can be life-saving in some patients. Finally, results of several recent studies have suggested there is an association between dental and other invasive procedures and an increased risk of developing infective endocarditis. Moreover, data indicate that antibiotic prophylaxis may be effective in some scenarios.

Mortality patterns in older adults with infective endocarditis in the US: A retrospective analysis

BACKGROUND

Infective Endocarditis (IE) has become a significant cause of morbidity and mortality over the last two decades. Despite management advancements, mortality trends in the USA's geriatric population are unexplored. The aim of this study was to assess the trends and regional differences in IE related mortality among geriatric patients in the USA.

METHODS

We analyzed death certificates sourced from the CDC WONDER database spanning 1999 to 2020. The research targeted individuals aged 65 and older. Age-adjusted mortality rates (AAMRs) per 100,000 and annual percent change (APC), along with 95% CI, were calculated through joinpoint regression analysis.

RESULTS

From 1999 to 2020, infective endocarditis caused 222,573 deaths, showing a declining trend (APC: -0.8361). Males had higher AAMR (26.8) than females (22.2). NH White had the highest AAMR (25.8), followed by NH American Indians or Alaska Natives (19.6). Geographically, the Midwest had the highest AAMR (27.4), followed by the Northeast (25.8). Rural areas consistently had higher AAMRs (26.6) than urban areas (23.6), while 80.16% of deaths occurring in urban settings. North Dakota, Nebraska, and Montana had the highest state AAMRs, approximately double than the states with the lowest mortality rates: Mississippi, Hawaii, California, and Massachusetts. Those aged 85 and above accounted for 42.9% of deaths.

CONCLUSION

IE mortality exhibited a clear pattern: rising till 2004, declining from 2004 to 2018, and increasing again till 2020. Key risk factors were male gender, Midwest residence, NH White ethnicity, and age ≥85.Targeted interventions are essential to reduce IE mortality, especially among vulnerable older populations.

2024 Heart Disease and Stroke Statistics: A Report of US and Global Data From the American Heart Association

BACKGROUND

The American Heart Association (AHA), in conjunction with the National Institutes of Health, annually reports the most up-to-date statistics related to heart disease, stroke, and cardiovascular risk factors, including core health behaviors (smoking, physical activity, nutrition, sleep, and obesity) and health factors (cholesterol, blood pressure, glucose control, and metabolic syndrome) that contribute to cardiovascular health. The AHA Heart Disease and Stroke Statistical Update presents the latest data on a range of major clinical heart and circulatory disease conditions (including stroke, brain health, complications of pregnancy, kidney disease, congenital heart disease, rhythm disorders, sudden cardiac arrest, subclinical atherosclerosis, coronary heart disease, cardiomyopathy, heart failure, valvular disease, venous thromboembolism, and peripheral artery disease) and the associated outcomes (including quality of care, procedures, and economic costs).

METHODS

The AHA, through its Epidemiology and Prevention Statistics Committee, continuously monitors and evaluates sources of data on heart disease and stroke in the United States and globally to provide the most current information available in the annual Statistical Update with review of published literature through the year before writing. The 2024 AHA Statistical Update is the product of a full year's worth of effort in 2023 by dedicated volunteer clinicians and scientists, committed government professionals, and AHA staff members. The AHA strives to further understand and help heal health problems inflicted by structural racism, a public health crisis that can significantly damage physical and mental health and perpetuate disparities in access to health care, education, income, housing, and several other factors vital to healthy lives. This year's edition includes additional global data, as well as data on the monitoring and benefits of cardiovascular health in the population, with an enhanced focus on health equity across several key domains.

RESULTS

Each of the chapters in the Statistical Update focuses on a different topic related to heart disease and stroke statistics.

CONCLUSIONS

The Statistical Update represents a critical resource for the lay public, policymakers, media professionals, clinicians, health care administrators, researchers, health advocates, and others seeking the best available data on these factors and conditions.

Contemporary Outcomes and Predictors of Inpatient Mortality for Infective Endocarditis Occurring in Renal Transplant Recipients in the United States

Renal transplant (RT) recipients are susceptible to infections because of immunosuppression. The literature regarding the epidemiology and outcomes of infective endocarditis (IE) in RT recipients is limited. We analyzed the National Inpatient Sample in the United States to study IE in RT and identify risk factors for inpatient mortality and IE development in RT patients. All patients ≥18 years who had IE with and without RT between 2007 and 2019 were identified from the National Inpatient Sample. The demographics, co-morbidities, length of stay, hospital costs, and mortality of IE patients with RT were compared with IE patients without RT. Predictors of inpatient mortality for RT recipients with IE were analyzed. Between 2007 and 2019, there were 777,245 hospitalizations for IE, of which 3,782 had RT. The IE in RT cohort was younger than the general IE population and had higher proportions of males, non-White races, and Hispanic ethnicity, and higher burden of co-morbidities, but similar inpatient mortality rates. On multivariate analysis, Staphylococcal IE (adjusted odds ratio [aOR] 2.26, 95% confidence interval [CI] 1.2 to 4.3, p = 0.015), stroke (aOR 6.4, 95% CI 2.7 to 15.3, p <0.001), anemia (aOR 2.3, 95% CI 1.3 to 4.0, p = 0.004), and shock (aOR 6.3, 95% CI 3.3 to 11.9, p <0.001) were associated with greater inpatient mortality, whereas Streptococcal endocarditis (aOR 0.37, 95% CI 0.1 to 0.9, p = 0.038) was associated with lower inpatient mortality. In conclusion, RT patients with IE were younger and had more severe co-morbidities compared with IE patients without RT. Staphylococcal IE, presence of shock and stroke worsened the prognosis in these patients.