Biomedical subjects

John Spertus

Publications and source records attributed to John Spertus.

17 recordsLinked to original sources

PubMed2006

Achieving quality in cardiovascular imaging: proceedings from the American College of Cardiology-Duke University Medical Center Think Tank on Quality in Cardiovascular Imaging.

Cardiovascular imaging has enjoyed both rapid technological advances and sustained growth, yet less attention has been focused on quality than in other areas of cardiovascular medicine. To address this deficit, representatives from cardiovascular imaging societies, private payers, government agencies, the medical imaging industry, and experts in quality measurement met, and this report provides an overview of the discussions. A consensus definition of quality in imaging and a convergence of opinion on quality measures across imaging modalities was achieved and are intended to be the start of a process culminating in the development, dissemination, and adoption of quality measures for all cardiovascular imaging modalities.

Academic Medical Centers↗

PubMed2006

Personal health habits of American cardiologists.

This study surveyed all cardiologists in a large coalition of cardiology groups. A 1-page, 25-item anonymous questionnaire containing 3 sections (demographics, medical history, and current medications and supplements) was used. Data from returned questionnaires were analyzed and compared with those in national databases. Eight hundred surveys were sent, and complete data were available for analysis on 471 (59%). The average age of the participants was 48.6 years; 7.1% were women. The average body mass index (BMI) was 25 kg/m(2), and 8% were obese (BMI > or =30 kg/m(2)); 1.3% were active smokers; 89% exercised > or =1 time/week; and 72% had > or =1 alcoholic drink/week. Red wine was the most frequently consumed alcoholic beverage. Associated cardiovascular risks included dyslipidemia (28%), hypertension (14%), and diabetes mellitus (0.6%). Four percent had experienced coronary events. Compared with matched cohorts from the United States (US) population, cardiologists reported lower rates of hypertension, dyslipidemia, and diabetes mellitus, and the rates of smoking and obesity were 1/18 and 1/3 those of the US population, respectively. Aspirin and statins were each taken daily by about 1/3 of the participants. A cardiologist with dyslipidemia was 5 times as likely to be treated and a cardiologist with hypertension was almost twice as likely to be treated as an American adult man with either of these disorders, respectively. In conclusion, cardiologists appear to follow healthier lifestyles than the general adult US population.

Adult↗

PubMed2006

Economics methods in the Clinical Outcomes Utilizing percutaneous coronary Revascularization and Aggressive Guideline-driven drug Evaluation (COURAGE) trial.

Percutaneous coronary intervention (PCI) remains a major therapeutic option for the treatment of chronic coronary artery disease. In the COURAGE trial, 2287 patients with chronic coronary disease were randomized between PCI with medical management and medical management alone. Embedded within the COURAGE trial is a detailed economic analysis being conducted in three health care systems: the US Veterans Administration (VA), Canada, and the US non-VA. Resource use and costs are being collected for each system and overall. Survival is assessed internally in the trial with mean follow-up of 4.5 years. Long-term mean survival will be estimated by projecting survival beyond the trial period by extrapolating the in-trial hazard rates. Utility is being assessed at baseline and at 1, 3, and 6 months and annually thereafter, using a computer-administered standard gamble. Quality-adjusted life years are calculated by multiplying survival by utility. The incremental cost-effectiveness ratio of PCI will be defined as the additional cost of PCI divided by the gain in life years and quality-adjusted life years. The 95% confidence regions of efficacy and costs will be determined by bootstrap over a range of acceptability thresholds, which will then be displayed in the cost-effectiveness plane and as a cost-effectiveness acceptability curve. A multilevel regression model will assess cost-effectiveness from a net benefit perspective. These approaches should provide the most detailed assessment available of the cost-effectiveness of PCI for coronary artery disease.

Angioplasty, Balloon, Coronary↗

PubMed2006

Patient-reported economic burden and the health status of heart failure patients.

BACKGROUND: Heart failure (HF) guidelines recommend treatment with multiple medications to improve survival, functioning, and quality of life. Yet, HF treatments can be costly, resulting in significant economic burden for some patients. To date, there are few data on the impact of patients' perceived difficulties in affording medical care on their health outcomes. METHODS AND RESULTS: Comprehensive clinical data, health status, and the perceived economic burden of 539 HF outpatients from 13 centers were assessed at baseline and 1 year later. Health status was quantified with the Kansas City Cardiomyopathy Questionnaire overall summary score. Cross-sectional and longitudinal (1-year) analyses were conducted comparing the health status of patients with and without self-reported economic burden. Patients with economic burden had significantly lower health status scores at both baseline and 1 year later. Although baseline perceptions of economic burden were associated with poorer health status, patients' perceived difficulty affording medical care at 1 year was a more important determinant of lower 1-year health status. CONCLUSION: HF patients reporting difficulty affording their medical care had lower perceived health status than those reporting little to no economic burden. More research is needed to further evaluate this association and to determine whether addressing perceived economic difficulties affording health care can improve HF patients' health status.

Aged↗

PubMed2006

Impact of obesity on the health status of heart failure patients.

BACKGROUND: Obesity is a recognized, preventable risk factor for the development of heart failure (HF); however, little is understood about its effects on patients with established HF. Furthermore, few researchers have assessed obesity's effect on the health status of established HF patients. This study evaluated the influence of obesity on the health status, at baseline and 1 year later, on patients with established HF. METHODS AND RESULTS: Comprehensive clinical data, health status, and obesity classification of 543 HF outpatients from 13 centers was assessed at baseline and 1 year later. Health status was quantified with the generic Short Form-12 and disease-specific Kansas City Cardiomyopathy Questionnaire Overall Summary score. Cross-sectional and longitudinal risk-adjusted general linear models were computed comparing the health status of patients who were classified as either underweight, normal weight, overweight, or obese. Obesity classification was not significantly associated with patients' baseline health status and did not predict 1-year health status. CONCLUSIONS: Although obesity has been reported to confer a survival advantage to patients with HF, it was not associated with better health status at baseline, or after 1 year, in our cohort. Better understanding of the relationship among HF, body weight, and health status is needed before evidence-based recommendations can be made regarding weight management for HF patients.

Aged↗

PubMed2006

The role of academic medicine in improving health care quality.

Academic medicine, often entrenched in biomedical and clinical research, has largely ignored the development and application of quality metrics to ensure the delivery of high-quality health care. Nevertheless, academic medicine has substantial opportunities to lead the charge in building a quality infrastructure with the goal of delivering high-quality and cost-efficient health care to all Americans. The American College of Cardiology (ACC) and American Heart Association (AHA) have worked jointly to measure and improve the quality of cardiovascular care. This effort has led to the development of clinical practice guidelines, performance measures, data standards, national registries, and appropriateness criteria for cardiovascular care. Academic medicine should actively embrace and promote the type of quality metrics and criteria developed by ACC and AHA and apply this model across the entire academic medicine community. Academic medicine, with its many resources, could lead the way in the expanding field of quality science by supporting fundamental research in quality improvement, supporting academicians to improve quality at their own institutions, developing educational models for quality assessment and improvement, creating and implementing data registries, and serving as a conduit for developing the emerging science of quality assessment. In this and many other ways, academic medicine must offer the health care community leadership for improving our nation's health care quality with the same fervor presently exhibited for the advancement of basic science, the development of specialized and experimental therapy, and as centers for tertiary and quaternary patient care.

Academic Medical Centers↗

PubMed2005

The influence of race on health status outcomes one year after an acute coronary syndrome.

OBJECTIVES: The goal of this study was to compare health status (symptoms, function, and quality of life) outcomes of whites and blacks one year after an acute coronary syndrome (ACS). BACKGROUND: Although racial differences in the use of angiography and revascularization after ACS are known to exist, differences in health status outcomes have not been described. METHODS: We conducted a prospective registry of 1,159 consecutive ACS patients treated between February 1, 2000 and October 31, 2001. One-year health status was quantified with the Seattle Angina Questionnaire (SAQ) and Short Form-12 Physical Component Score (SF-12 PCS). Multivariable models were used to adjust for racial differences in sociodemographic, clinical, and treatment characteristics. RESULTS: Mortality rates were similar among the 196 black and 963 white patients (7.1% vs. 7.0%, p = 0.93); 81 died during follow-up, and 199 (17%) could not be interviewed. At one year, blacks had a higher prevalence of angina (43.4% vs. 27.1%), worse quality of life (SAQ score = 70.6 +/- 28.3 vs. 83.9 +/- 20.8), and poorer physical function (SF-12 PCS = 36.8 +/- 12.3 vs. 43.2 +/- 11.4; p < 0.0001 for all). Multivariable models, including hospital treatments, revealed a trend for more angina (odds ratio 1.46 [95% confidence interval 0.91 to 2.34]) and significantly worse quality of life (mean difference = -7.7 +/- 2.4, p = 0.002) and physical function (-3.6 +/- 1.3, p = 0.005). CONCLUSIONS: Blacks have more angina, worse quality of life, and worse physical function one year after an ACS than do whites. Closer surveillance of black ACS patients is needed to determine whether additional treatment can improve their outcomes.

Acute Disease↗

PubMed2005

Frequency of undiagnosed diabetes mellitus in patients with acute coronary syndrome.

In a prospective cohort of patients who had acute coronary syndrome, we used a simple fasting plasma glucose to identify previously unrecognized diabetes mellitus. A total of 57% of patients who had acute coronary syndrome had abnormal glucose metabolism; approximately 66% of those who met criteria for new diabetes were not diagnosed or treated as such by the physicians who managed them.

Angina, Unstable↗

PubMed2005

Effect of difficulty affording health care on health status after coronary revascularization.

BACKGROUND: An objective of the United States' Healthy People 2010 Initiative is to eliminate disparities based on socioeconomic status. We assessed the effect of difficulty affording health care on the health status (symptoms, function, and quality of life) of patients treated with percutaneous coronary intervention or CABG. METHODS AND RESULTS: A consecutive, single-center cohort of 480 patients undergoing coronary revascularization received the Seattle Angina Questionnaire at the time of their procedure and at subsequent monthly intervals for 6 months. At baseline, patients who reported somewhat of a burden to a severe burden in affording health care had significantly lower scores on the Seattle Angina Questionnaire (mean+/-SD) with respect to angina (55+/-29 versus 68+/-25, P<0.0001), physical limitation (55+/-26 versus 72+/-24, P<0.0001), and quality of life (46+/-22 versus 56+/-22, P<0.0001) than those who did not perceive healthcare costs to be burdensome. Although both groups of patients improved after revascularization, poorer health status persisted among those with difficulty affording health care after percutaneous coronary intervention (6-month mean+/-SE: angina 79+/-2.5 versus 88+/-1.9, P=0.002; physical function 61+/-2.7 versus 80+/-2.0, P<0.0001; quality of life 67+/-2.4 versus 82+/-1.8, P<0.0001) but not after CABG (angina 91+/-2.5 versus 93+/-1.6, P=0.47; physical function 75+/-3.4 versus 81+/-2.2, P=0.13; quality of life 84+/-3.1 versus 84+/-2.0, P=0.81). Similar differences remained after adjustment for demographic and clinical characteristics. CONCLUSIONS: Patients reporting difficulty affording health care have worse health status at the time of coronary revascularization. A persistent disparity exists after percutaneous but not surgical revascularization. Additional inquiry into the mechanism of this disparity is needed so that the goals of equitable health care, irrespective of treatment strategy, can be achieved.

Aged↗

PubMed2005

Low rates of exercise in patients with metabolic syndrome after an acute coronary syndrome.

BACKGROUND: Metabolic syndrome (MetSyn) has reached epidemic proportions; however, regular exercise can prevent its progression to type 2 diabetes. HYPOTHESIS: The study was undertaken to determine both the rate and predictors of routine exercise 1 year after an acute coronary syndrome (ACS) in patients with MetSyn. METHODS: In a registry of 1,199 patients presenting with ACS, those with MetSyn were identified using the modified NCEP-ATP III criteria. Baseline and 1-year exercise patterns were examined in these patients, and the characteristics of those who were exercising were then compared with those who were not. A multivariable logistic regression analysis was subsequently conducted to identify independent predictors of exercise at 1 year. RESULTS: Of 273 patients with MetSyn, baseline and 1-year data about patients' exercise patterns were available for 170, of whom only 92 (54.2%) were exercising at 1 year. Characteristics that differed between those who were and those who were not exercising at 1 year included exercise at baseline (40 vs. 16.7%, p<0.001), Caucasian race (92.4 vs. 79.5%, p = 0.01), and body mass index (BMI) (30.4 +/- 4.3 vs. 32.1 +/- 5.0, p = 0.02). In a multivariable analysis, significant independent predictors of exercise were routine exercise at the time of admission for ACS (odds ratio [OR] = 2.6,95% confidence interval [CI] = 1.1-6.4), younger age (OR = 0.67 per 10-year increase [95% CI = 0.45-0.99]), and lower BMI (OR = 0.4 per 10-unit increase [95% CI = 0.17-0.911). CONCLUSIONS: Almost half of patients with MetSyn did not participate in routine exercise 1 year after their admission for ACS. Innovative strategies are needed to increase exercise participation in such patients, particularly those not exercising at baseline as well as obese and older patients.

Age Factors↗

PubMed2005

Monitoring clinical changes in patients with heart failure: a comparison of methods.

BACKGROUND: Although monitoring the clinical status of patients with heart failure rests at the core of clinical medicine, the ability of different techniques to reflect clinical change has not been evaluated. This study sought to describe changes in various measures of disease status associated with gradations of clinical change. METHODS: A prospective, 14-center cohort of 476 outpatients was assessed at baseline and 6 +/- 2 weeks to compare changes in 7 heart failure measures with clinically observed change. Measures included health status instruments (the Kansas City Cardiomyopathy Questionnaire [KCCQ], Short Form-12, and EQ-5D), physician-assessed functional class (New York Heart Association [NYHA]), an exercise test (6-minute walk), patient weight, and a biomarker (B-type natriuretic peptide). Cardiologists, blinded to all measures except weight and NYHA, categorized clinical change ranging from large deterioration to large improvement. RESULTS: The KCCQ, NYHA, and 6-minute walk test were most sensitive to clinical change. For patients with large, moderate, and small deteriorations, the KCCQ decreased by 25 +/- 16, 17 +/- 14, and 5.3 +/- 11 points, respectively. For patients with small, moderate, and large improvements, the KCCQ increased by 5.7 +/- 16, 10.5 +/- 16, and 22.3 +/- 16 points, respectively (P < .01 for all compared with the no change group). New York Heart Association and 6-minute walk distance were significantly different for those with moderate and large changes (P < .05) but neither revealed a difference between those with small versus no clinical deterioration. The KCCQ had the highest c statistic for monitoring individual patients, followed by NYHA and 6-minute walk. CONCLUSION: The KCCQ, followed by the NYHA and the 6-minute walk test, most accurately reflected clinical change in patients with heart failure.

Diagnostic Tests, Routine↗

PubMed2004

Using the risk of restenosis as a guide to triaging patients between surgical and percutaneous coronary revascularization.

BACKGROUND: Coronary artery bypass graft (CABG) and percutaneous coronary revascularization (PCI) are strategies for treating coronary disease. Because the principal limitation of PCI is restenosis, CABG might be favored for those at high risk for restenosis. Using a clinical risk score for predicting restenosis, we examined whether patients with higher risks for restenosis were preferentially referred for CABG. METHODS AND RESULTS: A procedural registry of 2320 revascularization patients from whom data on procedure type, demographics, comorbid conditions, health status, vessel anatomy, and outcomes were taken was analyzed. Patients were classified and scored into 3 categories of restenosis risk ranging from 11% to 44%, as defined by 8 preprocedural characteristics. The objective of this study was to describe referral patterns between PCI and CABG in each category of risk. 2060 patients underwent nonemergent revascularization. 1404 of the patients underwent PCI and 656 were treated with CABG. Among the patients at low and intermediate risk for restenosis, twice as many were referred to PCI. Among those at the highest risk, 3-times as many were referred to PCI, resulting in a significant trend for those with the higher risks of restenosis to be preferentially referred to PCI (P=0.015). Similar results were seen when the analysis was restricted to only those with multivessel disease. CONCLUSIONS: Patients at higher risk for restenosis were being preferentially treated with PCI as opposed to CABG. These results may have implications for reevaluating current patterns of triaging patients between PCI and CABG, and for the use of drug-eluting stents within PCI patients.

Aged↗

PubMed2004

The peripheral artery questionnaire: a new disease-specific health status measure for patients with peripheral arterial disease.

BACKGROUND: The most common indication for treating patients with peripheral arterial disease is to improve their health status: their symptoms, function, and quality of life. Quantifying health status requires a valid, reproducible, and sensitive disease-specific measure. The Peripheral Artery Questionnaire (PAQ) is a 20-item questionnaire developed to meet this need by quantifying patients' physical limitations, symptoms, social function, treatment satisfaction, and quality of life. METHODS: Psychometric and clinical properties of the PAQ were evaluated in a prospective cohort study of 44 patients undergoing elective percutaneous peripheral revascularization. To establish reproducibility, 2 assessments were performed 2 weeks apart and before revascularization. The change in scores before and 6 weeks after revascularization were used to determine the instruments' responsiveness and were compared with the Short Form-36 and the Walking Impairment Questionnaire. A series of cross-sectional analyses were performed to establish the construct validity of the PAQ. RESULTS: The 7 domains of the PAQ were internally reliable, with Cronbach alpha = 0.80 to 0.94. The test-retest reliability analyses revealed insignificant mean changes of 0.6 to 2.3 points (P = not significant for all). Conversely, the change after revascularization ranged from 13.7 to 41.9 points (P < or =.001 for all), reflecting substantial sensitivity of the PAQ to clinical improvement. The PAQ Summary Scale was the most sensitive of all scales tested. Construct validity was established by demonstrating correlations with other measures of patient health status. CONCLUSIONS: The PAQ is a valid, reliable, and responsive disease-specific measure for patients with peripheral arterial disease. It may prove to be a useful end point in clinical trials and a potential aid in disease management.

Aged↗

PubMed2004

Consensus statement: Palliative and supportive care in advanced heart failure.

BACKGROUND: A consensus conference was convened to define the current state and important gaps in knowledge and needed research on "Palliative and Supportive Care in Advanced Heart Failure." EVIDENCE: Evidence was drawn from expert opinion and from extensive review of the medical literature, evidence-based guidelines, and reviews. CONCLUSIONS: The conference identified gaps in current knowledge, practice, and research relating to prognostication, symptom management, and supportive care for advanced heart failure (HF). Specific conclusions include: (1) although supportive care should be integrated throughout treatment of patients with advanced HF, data are needed to understand how to best decrease physical and psychosocial burdens of advanced HF and to meet patient and family needs; (2) prognostication in advanced HF is difficult and data are needed to understand which patients will benefit from which interventions and how best to counsel patients with advanced HF; (3) research is needed to identify which interventions improve quality of life and best achieve the outcomes desired by patients and family members; (4) care should be coordinated between sites of care, and barriers to evidence-based practice must be addressed programmatically; and (5) more research is needed to identify the content and technique of communicating prognosis and treatment options with patients with advanced HF; physicians caring for patients with advanced HF must develop skills to better integrate the patient's preferences into the goals of care.

Counseling↗

PubMed2003

Smoking and health outcomes after percutaneous coronary intervention.

BACKGROUND: This study was designed to describe the impact of smoking on health status and mortality after percutaneous coronary intervention (PCI). METHODS: A cohort of 271 consecutive PCI patients at the Mid-America Heart Institute of St Luke's Hospital in Kansas City, Mo, were observed in a prospective, observational study. Surveys that included health status assessments were administered at baseline and at 6 and 12 months after intervention. Primary outcome was health status as measured by the Short Form-12 (SF-12) and the Seattle Angina Questionnaire (SAQ). RESULTS: Risk-adjusted statistical models demonstrated that, across a number of health-related quality of life domains, patients who were current smokers had poorer health status outcomes than other patients after revascularization. For instance, patients who had never smoked (P <.001) and patients who were former smokers (P <.001) scored significantly higher than patients who were current smokers on the physical component score of the SF-12, which indicated a better sense of overall physical function. Similarly, patients who had never smoked and patients who were former smokers reported significantly fewer physical limitations, less angina, and a higher quality of life on the SAQ than patients who were current smokers. Smoking status was unrelated to mortality rate in the 12 months after revascularization. CONCLUSIONS: Smoking substantially limits the potential health status benefits of PCI.

Adult↗

PubMed2003

Assessing depression in the cardiac patient. When is the appropriate time to assess depression in the patient undergoing coronary revascularization?

Depression is a well-established risk factor for cardiovascular disease-related morbidity and mortality. It is common to screen for depression in patients undergoing coronary revascularization prior to revascularization; however, the validity of this assessment is unclear as some patients may experience transient, reactive depression rather than persistent depression. The authors evaluated whether an initial or 1-month postprocedure screen was optimal for identifying consistently depressed patients. Depression at 1-month postprocedure was a stronger predictor of depression at months 2 to 6 than baseline depression. After adjusting potential confounding variables, there was a much stronger relationship between 1-month and 6-month depression status (OR = 28.7 if depressed at 1 month, p < .001) than between baseline and 6-month depression status (OR = 6.5 if depressed at baseline, p < .001). Screening for depression at the time of revascularization is not as predictive of depression at 6 months as it is 1 month postprocedure.

Aftercare↗

PubMed2002

Depression-related costs in heart failure care.

BACKGROUND: Behavioral factors may play a role in heart failure (HF) care costs by increasing hospital readmission rates. This study sought to estimate the effect of depression on health care costs for patients hospitalized for HF. METHODS: A 3-year retrospective cohort study of a staff-model health maintenance organization. Following a first hospitalization with a primary diagnosis of HF, 1098 health maintenance organization patients were evaluated. Median annualized health care costs for 3 depression groups were identified: (1) no depression (n = 672; cost, $7474), (2) antidepressant prescription only (n = 312; cost, $11 012), and (3) antidepressant prescription and depression diagnosis recorded (n = 114; cost, $9550). Depression and HF status were determined through diagnostic, laboratory, and pharmacy records. Actual utilization and cost values were derived from administrative data. RESULTS: After adjusting for age, sex, medical comorbidity, and length of stay at index hospitalization (as proxy for HF severity), costs were 26% higher in the antidepressant prescription only group and 29% higher in the antidepressant prescription and depression diagnosis recorded group when compared with the no depression group (both P<.001). Increased inpatient and outpatient utilization contributed to the increased costs. CONCLUSION: Costs of care for patients hospitalized for HF are significantly higher for patients with evidence of depression.

Aged↗