The effect of race and sex on physicians' recommendations for cardiac catheterization.
(1/2517)
BACKGROUND: Epidemiologic studies have reported differences in the use of cardiovascular procedures according to the race and sex of the patient. Whether the differences stem from differences in the recommendations of physicians remains uncertain. METHODS: We developed a computerized survey instrument to assess physicians' recommendations for managing chest pain. Actors portrayed patients with particular characteristics in scripted interviews about their symptoms. A total of 720 physicians at two national meetings of organizations of primary care physicians participated in the survey. Each physician viewed a recorded interview and was given other data about a hypothetical patient. He or she then made recommendations about that patient's care. We used multivariate logistic-regression analysis to assess the effects of the race and sex of the patients on treatment recommendations, while controlling for the physicians' assessment of the probability of coronary artery disease as well as for the age of the patient, the level of coronary risk, the type of chest pain, and the results of an exercise stress test. RESULTS: The physicians' mean (+/-SD) estimates of the probability of coronary artery disease were lower for women (probability, 64.1+/-19.3 percent, vs. 69.2+/-18.2 percent for men; P<0.001), younger patients (63.8+/-19.5 percent for patients who were 55 years old, vs. 69.5+/-17.9 percent for patients who were 70 years old; P<0.001), and patients with nonanginal pain (58.3+/-19.0 percent, vs. 64.4+/-18.3 percent for patients with possible angina and 77.1+/-14.0 percent for those with definite angina; P=0.001). Logistic-regression analysis indicated that women (odds ratio, 0.60; 95 percent confidence interval, 0.4 to 0.9; P=0.02) and blacks (odds ratio, 0.60; 95 percent confidence interval, 0.4 to 0.9; P=0.02) were less likely to be referred for cardiac catheterization than men and whites, respectively. Analysis of race-sex interactions showed that black women were significantly less likely to be referred for catheterization than white men (odds ratio, 0.4; 95 percent confidence interval, 0.2 to 0.7; P=0.004). CONCLUSIONS: Our findings suggest that the race and sex of a patient independently influence how physicians manage chest pain. (+info)
Fibrinolytic activation markers predict myocardial infarction in the elderly. The Cardiovascular Health Study.
(2/2517)
Coagulation factor levels predict arterial thrombosis in epidemiological studies, but studies of older persons are needed. We studied 3 plasma antigenic markers of fibrinolysis, viz, plasminogen activator inhibitor-1 (PAI-1), fibrin fragment D-dimer, and plasmin-antiplasmin complex (PAP) for the prediction of arterial thrombosis in healthy elderly persons over age 65. The study was a nested case-control study in the Cardiovascular Health Study cohort of 5201 men and women >/=65 years of age who were enrolled from 1989 to 1990. Cases were 146 participants without baseline clinical vascular disease who developed myocardial infarction, angina, or coronary death during a follow-up of 2.4 years. Controls remained free of cardiovascular events and were matched 1:1 to cases with respect to sex, duration of follow-up, and baseline subclinical vascular disease status. With increasing quartile of D-dimer and PAP levels but not of PAI-1, there was an independent increased risk of myocardial infarction or coronary death, but not of angina. The relative risk for D-dimer above versus below the median value (>/=120 microg/L) was 2.5 (95% confidence interval, 1.1 to 5.9) and for PAP above the median (>/=5.25 nmol/L), 3.1 (1.3 to 7.7). Risks were independent of C-reactive protein and fibrinogen concentrations. There were no differences in risk by sex or presence of baseline subclinical disease. D-dimer and PAP, but not PAI-1, predicted future myocardial infarction in men and women over age 65. Relationships were independent of other risk factors, including inflammation markers. Results indicate a major role for these markers in identifying a high risk of arterial disease in this age group. (+info)
Randomised controlled trial of follow up care in general practice of patients with myocardial infarction and angina: final results of the Southampton heart integrated care project (SHIP). The SHIP Collaborative Group.
(3/2517)
OBJECTIVE: To assess the effectiveness of a programme to coordinate and support follow up care in general practice after a hospital diagnosis of myocardial infarction or angina. DESIGN: Randomised controlled trial; stratified random allocation of practices to intervention and control groups. SETTING: All 67 practices in Southampton and south west Hampshire, England. SUBJECTS: 597 adult patients (422 with myocardial infarction and 175 with a new diagnosis of angina) who were recruited during hospital admission or attendance at a chest pain clinic between April 1995 and September 1996. INTERVENTION: Programme to coordinate preventive care led by specialist liaison nurses which sought to improve communication between hospital and general practice and to encourage general practice nurses to provide structured follow up. MAIN OUTCOME MEASURES: Serum total cholesterol concentration, blood pressure, distance walked in 6 minutes, confirmed smoking cessation, and body mass index measured at 1 year follow up. RESULTS: Of 559 surviving patients at 1 year, 502 (90%) were followed up. There was no significant difference between the intervention and control groups in smoking (cotinine validated quit rate 19% v 20%), lipid concentrations (serum total cholesterol 5.80 v 5.93 mmol/l), blood pressure (diastolic pressure 84 v 85 mm Hg), or fitness (distance walked in 6 minutes 443 v 433 m). Body mass index was slightly lower in the intervention group (27.4 v 28.2; P=0.08). CONCLUSIONS: Although the programme was effective in promoting follow up in general practice, it did not improve health outcome. Simply coordinating and supporting existing NHS care is insufficient. Ischaemic heart disease is a chronic condition which requires the same systematic approach to secondary prevention applied in other chronic conditions such as diabetes mellitus. (+info)
The transmyocardial laser revascularization international registry report.
(4/2517)
AIMS: This report aimed to provide an analysis of the data submitted from Europe and Asia on transmyocardial laser revascularization. METHODS AND RESULTS: Prospective data was recorded on 967 patients with intractable angina not amenable to conventional revascularization in 21 European and Asian centres performing transmyocardial laser revascularization using the PLC Medical Systems CO2 laser. Patient characteristics, operative details and early complications following transmyocardial laser revascularization were recorded. The in-hospital death rate was 9.7% (95% confidence interval 7.8% to 11.6%). Other early complications were consistent with similar cardiothoracic surgical procedures. There was a decrease of two or more Canadian Cardiovascular Score angina classes in 47.3%, 45.4% and 34.0% of survivors at 3, 6 and 12 months follow-up, respectively (P=0.001 for each). Treadmill exercise time increased by 42 s at 3 months (P=0.008), 1 min 43 s at 6 months (P<0.001) and 1 min 50 s at 12 months (P<0.001) against pre-operative times of 6 min. CONCLUSION: Uncontrolled registry data suggest that transmyocardial laser revascularization may lead to a decrease in angina and improved exercise tolerance. It does, however, have a risk of peri-operative morbidity and mortality. Definitive results from randomized controlled trials are awaited. (+info)
Heart rate variability and ischaemia in patients with coronary heart disease and stable angina pectoris; influence of drug therapy and prognostic value. TIBBS Investigators Group. Total Ischemic Burden Bisoprolol Study.
(5/2517)
AIMS: Determination of the influence of therapy with bisoprolol and nifedipine on the heart rate variability of patients from the Total Ischemic Burden Bisoprolol Study and examination of the prognostic value. METHODS AND RESULTS: Four hundred and twenty-two patients with stable angina were included. The heart rate variability was determined over a period of 24 h. Parameters determined: standard deviation of the mean of all corrected RR intervals, standard deviation of all 5 min mean cycle lengths, square root of the mean of the squared differences of successive corrected RR intervals. Nifedipine reduced the mean values of all heart rate variability parameters tested. Square root of the mean of the square differences of successive corrected RR intervals increased under bisoprolol. Standard deviation of the mean of all corrected RR intervals and standard deviation of all 5 min mean cycle lengths increased from low baseline values and declined from higher baseline values. The increase in heart rate variability under therapy was accompanied by a tendency towards a better prognosis. Patients with an increase in heart rate variability and simultaneous complete suppression of ischaemia under therapy displayed no serious events in the course of one year. CONCLUSIONS: The increase in the heart rate variability, which can be regarded as prognostically favourable, was predominantly observed under bisoprolol. The parameter constellation of an increase in heart rate variability and complete ischaemia suppression on the 48-h Holter ECG was associated with the greatest benefit. (+info)
Evaluation of technician supervised treadmill exercise testing in a cardiac chest pain clinic.
(6/2517)
OBJECTIVE: To determine the efficacy and safety of trained cardiac technicians independently performing treadmill exercise stress tests as part of the assessment of patients with suspected angina pectoris. DESIGN: Retrospective comparison of 250 exercise tests performed by cardiac technicians and 225 tests performed by experienced cardiology clinical assistants (general practitioners who perform regular NHS cardiology duties), and consultant cardiologists over the same time period. SETTING: Regional cardiac centre with a dedicated cardiac chest pain clinic. PATIENTS: All patients were referred by their general practitioners with a history of recent onset of chest pain, which was suspected to be angina pectoris. OUTCOME MEASURES: Peak workload achieved, symptoms, indications for termination, complications. RESULTS: The diagnostic yield of technician supervised tests (percentage positive or negative) was similar to that of medically supervised tests (76% v 69%, NS). The average peak workload achieved by patients was less by 1.2 mets (p < 0.005). This was probably due to more tests being terminated earlier due to chest pain and ST segment depression in the technician group compared with doctors (10% and 16% v 5% and 11% respectively, p = 0.06 and 0.07). One patient in the technician supervised group developed a supraventricular tachycardia during the recovery phase of the exercise test. CONCLUSIONS: Technician supervised stress testing is associated with a high diagnostic rate and low complication rate in patients with suspected ischaemic heart disease. Its efficacy is comparable to tests supervised by experienced doctors and its use should be encouraged. (+info)
Follow-up care in general practice of patients with myocardial infarction or angina pectoris: initial results of the SHIP trial. Southampton Heart Integrated Care Project.
(7/2517)
OBJECTIVE: We aimed to assess the effectiveness of a nurse-led programme to ensure that follow-up care is provided in general practice after hospital diagnosis of myocardial infarction (MI) or angina pectoris. METHODS: We conducted a randomized controlled trial with stratified random allocation of practices to intervention and control groups within all 67 practices in Southampton and South-West Hampshire, England. The subjects were 422 adult patients with a MI and 175 patients with a new diagnosis of angina recruited during hospital admission or chest pain clinic attendance between April 1995 and September 1996. Intervention involved a programme of secondary preventive care led by specialist liaison nurses in which we sought to improve communication between hospital and general practice and to encourage general practice nurses to provide structured follow-up. The main outcome measures were: extent of general practice follow-up; attendance for cardiac rehabilitation; medication prescribed at hospital discharge; self-reported smoking, diet and exercise; and symptoms of chest pain and shortness of breath. Follow-ups of 90.1 % of subjects at 1 month and 80.6% at 4 months were carried out. RESULTS: Median attendance for nurse follow-up in the 4 months following diagnosis was 3 (IQR 2-5) in intervention practices and 0 (IQR 0-1) in control practices; the median number of visits to a doctor was the same in both groups. At hospital discharge, levels of prescribing of preventive medication were low in both intervention and control groups: aspirin 77 versus 74% (P = 0.32), cholesterol lowering agents 9 versus 10% (P = 0.8). Conversely, 1 month after diagnosis, the vast majority of patients in both groups reported healthy lifestyles: 90 versus 84% reported eating healthy food (P = 0.53); 73 versus 67% taking regular exercise (P = 0.13); 89 versus 92% not smoking (P = 0.77). Take up of cardiac rehabilitation was 37% in the intervention group and 22% in the control group (P = 0.001); the median number of sessions attended was also higher (5 versus 3 out of 6). CONCLUSIONS: The intervention of a liaison nurse is effective in ensuring that general practice nurses follow-up patients after hospital discharge. It does not alter the number of follow-up visits made by the patient to the doctor. Levels of prescribing and reported changes in behaviour at hospital discharge indicate that the main tasks facing practice nurses during follow-up are to help patients to sustain changes in behaviour, to encourage doctors to prescribe appropriate medication and to encourage patients to adhere to medication while returning to an active life. These are very different tasks to those traditionally undertaken by practice nurses in relation to primary prevention, where the emphasis has been on identifying risk and motivating change. Assessment of the effectiveness of practice nurses in undertaking these new tasks requires a longer follow-up. (+info)
The economic consequences of available diagnostic and prognostic strategies for the evaluation of stable angina patients: an observational assessment of the value of precatheterization ischemia. Economics of Noninvasive Diagnosis (END) Multicenter Study Group.
(8/2517)
OBJECTIVES: The study aim was to determine observational differences in costs of care by the coronary disease diagnostic test modality. BACKGROUND: A number of diagnostic strategies are available with few data to compare the cost implications of the initial test choice. METHODS: We prospectively enrolled 11,372 consecutive stable angina patients who were referred for stress myocardial perfusion tomography or cardiac catheterization. Stress imaging patients were matched by their pretest clinical risk of coronary disease to a series of patients referred to cardiac catheterization. Composite 3-year costs of care were compared for two patients management strategies: 1) direct cardiac catheterization (aggressive) and 2) initial stress myocardial perfusion tomography and selective catheterization of high risk patients (conservative). Analysis of variance techniques were used to compare costs, adjusting for treatment propensity and pretest risk. RESULTS: Observational comparisons of aggressive as compared with conservative testing strategies reveal that costs of care were higher for direct cardiac catheterization in all clinical risk subsets (range: $2,878 to $4,579), as compared with stress myocardial perfusion imaging plus selective catheterization (range: $2,387 to $3,010, p < 0.0001). Coronary revascularization rates were higher for low, intermediate and high risk direct catheterization patients as compared with the initial stress perfusion imaging cohort (13% to 50%, p < 0.0001); cardiac death or myocardial infarction rates were similar (p > 0.20). CONCLUSIONS: Observational assessments reveal that stable chest pain patients who undergo a more aggressive diagnostic strategy have higher diagnostic costs and greater rates of intervention and follow-up costs. Cost differences may reflect a diminished necessity for resource consumption for patients with normal test results. (+info)