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Ciccarone Center Research
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- Meet the Authors
Comparison of allogeneic vs autologous bone marrow–derived mesenchymal stem cells delivered by transendocardial injection in patients with ischemic cardiomyopathy: the POSEIDON randomized trial.
This study showed that, in aggregate, an injection of mesenchymal stem cells as a therapy for patients with ischemic cardiomyopathy favorably affected their functional capacity, quality of life, and ventricular remodeling.Published in: Journal of the American Medical AssociationRead on Pubmed
Mortality rates in smokers and nonsmokers in the presence or absence of coronary artery calcification.
The aim of this study was to further explore the interplay between smoking status, coronary artery calcium (CAC), and all-cause mortality. Smoking is a risk factor for death across the entire spectrum of subclinical coronary atherosclerosis. Smokers with any CAC had significantly higher mortality than smokers without CAC, a finding with implications for smokers undergoing lung cancer CT-based screening. However, the absence of CAC might not be as useful a "negative risk factor" in active smokers, because this group has mortality rates similar to nonsmokers with mild-to-moderate atherosclerosis.Published in: Journal of the American College of CardiologyRead on Pubmed
Coronary artery calcium for the prediction of mortality in young adults <45 years old and elderly adults >75 years old.
The value of coronary artery calcium for predicting mortality extends to both elderly patients and those <45 years old. Elderly persons with no CAC have a lower mortality rate than younger persons with high CAC.Published in: European Heart JournalRead on Pubmed
Health disparities in endocrine disorders: Biological, clinical, and nonclinical factors — an Endocrine Society Scientific Statement.Read on Pubmed
There is little evidence that genetic differences contribute significantly to race/ethnic disparities in the endocrine disorders examined. Multilevel interventions have reduced disparities in diabetes care, and these successes can be modeled to design similar interventions for other endocrine diseases.
Early in 2012, a debate over the merits of statin therapy in primary prevention was published in the Wall Street Journal. The statin opponent claimed that statins should only be used in secondary prevention and never in any primary-prevention patients at risk for cardiovascular events. In this evidence-based rebuttal to those claims, we review the evidence supporting the efficacy of statin therapy in primary prevention. Cardiovascular risk is a continuum in which those at an elevated risk of events stand to benefit from early initiation of therapy. Statins should not be reserved until after a patient suffers the catastrophic consequences of atherosclerosis. Contrary to the assertions of the statin opponent, this principle has been demonstrated through reductions in heart attacks, strokes, and mortality in numerous randomized controlled primary-prevention statin trials. In selected at-risk individuals, the combination of pharmacotherapy and lifestyle changes is more effective than either alone. Future investigation in prevention should focus on improving our ability to identify these at-risk individuals.Published in: Clinical CardiologyRead on Pubmed
Niacin and statin combination therapy for atherosclerosis regression and prevention of cardiovascular disease events: Reconciling the AIM-HIGH (Atherothrombosis Intervention in Metabolic Syndrome With Low HDL/High Triglycerides: Impact on Global Heal
Despite substantial risk reductions targeting low-density lipoprotein cholesterol with statins, there remains significant residual risk as evidenced by incident and recurrent CVD events among statin-treated patients. Observational studies have shown that low levels of high-density lipoprotein cholesterol (HDL-C) are associated with increased CVD risk. It remains unclear whether strategies aimed at increasing HDL-C in addition to background statin therapy will further reduce risk.Published in: Journal of the American College of CardiologyRead on Pubmed
Utility of coronary artery calcium scoring in the evaluation of patients with chest pain.
Although further research is needed, carefully selected patients presenting to the emergency department with a normal electrocardiogram, normal cardiac biomarkers, and no CAC may be considered for early discharge without further testing.
Role of nonenhanced multidetector CT coronary artery calcium testing in asymptomatic and symptomatic individuals.
Arteriosclerotic cardiovascular disease is the leading cause of death in the United States, with coronary artery disease (CAD) accounting for half of all cardiovascular disease deaths. Current risk assessment approaches for coronary heart disease, such as the Framingham risk score, substantially misclassify intermediate- to long-term risk for the occurrence of CAD in asymptomatic individuals. A screening modality such as a simple non-contrast-enhanced, or noncontrast, computed tomographic (CT) detection of coronary artery calcium (CAC) improves the ability to accurately predict risk in vulnerable groups and adds information above and beyond global risk assessment as shown by the recent Multi-Ethnic Study of Atherosclerosis. In addition, absence of CAC is associated with a very low risk of future CAD and as a result can be used to identify a group among which further testing and pharmacotherapies can be avoided. The Expert Consensus Document by the American College of Cardiology Foundation and the American Heart Association now recommends screening individuals at intermediate risk but did not find enough evidence to recommend CAC testing and further stratification of those in the low- or high-risk categories for CAD. In addition, emerging guidelines have suggested that absence of CAC can act as a "gatekeeper" for further testing among low- and intermediate-risk patients presenting with chest pain. This review of the current literature outlines the role of CAC testing in both asymptomatic and symptomatic individuals.
Utility of coronary artery calcium scoring in the evaluation of patients with chest pain.
Although further research is needed, carefully selected patients presenting to the emergency department with chest pain and with a normal electrocardiogram, normal cardiac biomarkers, and CAC = 0 may be considered for early discharge without further testing.
Endogenous sex hormone changes in postmenopausal women in the diabetes prevention program.
Among postmenopausal glucose-intolerant women not using estrogen, intensive lifestyle modification increased SHBG levels and lower DHEA levels. These changes are associated with lower glucose independent of adiposity and insulin. Metformin effects upon endogenous sex hormones are not significant.
Association of SRB1 variants with subclinical atherosclerosis and incident cardiovascular disease: The Multi-Ethnic Study of Atherosclerosis.
We previously reported a statistically significant association of SCARB1 intronic single nucleotide polymorphism (SNP) rs10846744 with common carotid intimal-medial artery thickness in each of the 4 Multi-Ethnic Study of Atherosclerosis racial/ethnic groups (white, Chinese, black, and Hispanic). The SCARB1 SNP, rs10846744, exerts a major effect on subclinical atherosclerosis and incident cardiovascular disease in humans.
Lipoprotein(a) particle concentration and lipoprotein(a) cholesterol assays yield discordant classification of patients defining four physiologically discrete groups.
There is little known about the relative predictive value of different lipoprotein(a) [Lp(a)] assays in clinical use, although each has been shown to predict similar incremental risk over conventional clinical and lipid risk factors. Thus, we examined the classification behavior of two commonly used Lp(a) assays and their associations with other lipid parameters. Serum lipid and Lp(a) concentrations were measured in 144 primary and secondary prevention patients. Lp(a) cholesterol [Lp(a)-C] was measured with the Vertical Auto Profile (upper limit of normal, 10 mg/dL). Lp(a) particle concentrations [Lp(a)-P] were measured with an isoform-independent molar assay (upper limit of normal, 70 nmol/L). The subjects were divided into the following four groups on the basis of their Lp(a)-C and Lp(a)-P levels: normal Lp(a)-P and Lp(a)-C; high Lp(a)-P and normal Lp(a)-C; normal Lp(a)-P and high Lp(a)-C; and high Lp(a)-P and Lp(a)-C. The proportion of subjects with values above the upper limit of normal was similar with both assays (P = .15). However, the Lp(a)-C and Lp(a)-P assays discordantly classified 23% of the study's subjects. In addition, the four Lp(a)-defined groups displayed differences in their relationships with other lipoproteins. The two groups with elevated Lp(a)-C showed significant associations with higher high-density lipoprotein cholesterol, apolipoprotein AI, and high-density lipoprotein cholesterol/apolipoprotein AI ratios. Triglycerides were also noted to be above normal in discordant and normal within concordant Lp(a) groups. Finally, the amount of cholesterol per Lp(a) particle [Lp(a)-C/Lp(a)-P] varied widely across the four groups. These findings suggest that the four Lp(a)-defined groups are physiologically discrete. Further investigation is warranted to assess which parameters among Lp(a)-P, Lp(a)-C, and Lp(a)-C/Lp(a)-P can be used to more accurately characterize Lp(a)-associated cardiovascular risk.
Herpes simplex virus type 2 (HSV-2) as a coronary atherosclerosis risk factor in HIV-infected men: Multicenter AIDS Cohort Study.
We assessed associations of herpes simplex virus types 1 and 2 (HSV-1 and -2), cytomegalovirus (CMV), and human herpesvirus 8 (HHV-8) infection with subclinical coronary atherosclerosis in 291 HIV-infected men in the Multicenter AIDS Cohort Study. Coronary artery calcium (CAC) was measured by non-contrast coronary CT imaging. Markers for herpesviruses infection were measured in frozen specimens collected 10-12 years prior to case identification. Multivariable logistic regression models and ordinal logistic regression models were performed. HSV-2 seropositivity was associated with coronary atherosclerosis (adjusted odds ratio [AOR]=4.12, 95% confidence interval [CI]=1.58-10.85) after adjustment for age, race/ethnicity, cardiovascular risk factors, and HIV infection related factors. Infection with a greater number of herpesviruses was associated with elevated CAC levels (AOR=1.58, 95% CI=1.06-2.36). Our findings suggest HSV-2 may be a risk factor for subclinical coronary atherosclerosis in HIV-infected men. Infection with multiple herpesviruses may contribute to the increased burden of atherosclerosis.
Association of sex hormones and sex hormone-binding globulin with depressive symptoms in postmenopausal women: the Multi-ethnic Study of Atherosclerosis.
In early postmenopausal women, sex hormones were associated with incident depressive symptoms.
Rhinotillexis: a possible heuristic to reduce inappropriate noninvasive cardiac imaging?
Computed tomography scans in the evaluation of fatty liver disease in a population based study: the multi-ethnic study of atherosclerosis.
Fatty liver disease is a common clinical entity in hepatology practice. This study evaluates the prevalence and reproducibility of computed tomography (CT) measures for diagnosis of fatty liver and compares commonly used CT criteria for the diagnosis of liver fat. Fatty liver can be reliably diagnosed using nonenhanced CT scans.