Thrombolytic therapy for women with myocardial infarction: is there a gender gap? Thrombolysis and Angioplasty in Myocardial Infarction Study Group

Comparison of 30-Day Readmission Rates After Hospitalization for Acute Myocardial Infarction in Men Versus Women

Readmission after hospitalization for acute myocardial infarction (AMI) significantly contributes to preventable morbidity and health-care costs. Outcomes after AMI vary by sex but the relationship of sex to readmissions warrants further exploration. Using the 2013 Nationwide Readmissions Database, we identified patients with a principal discharge diagnosis of AMI and stratified all-cause 30-day readmissions by sex and age. Of 214,824 patients, 44% were 18 to 64 years of age, 56% were ≥65 years, and 28% and 45%, respectively, were female. For patients 18 to 64 years, the readmission rate was 14% for women and 10% for men (p <0.001). For patients ≥65 years, the readmission rate was 18% for women and 16% for men (p <0.001). After adjusting for co-morbidities, women had a significantly higher risk of 30-day readmission compared with men, an effect that was strongest in younger women (odds ratio [OR] 1.21, 95% confidence interval [CI] 1.06 to 1.39, for ages 18 to 44; OR 1.13, 95% CI 1.07 to 1.18, for ages 45 to 64; OR 1.13, 95% CI 1.07 to 1.19, for ages 65 to 74, interaction p <0.001). The procedure rates during the index hospitalization were significantly lower for women. The most common readmission diagnoses were recurrent AMI, ischemic heart disease, and heart failure. Costs associated with readmissions after AMI totaled $447,506,740, of which $176,743,622 were attributed to readmissions of women. In conclusion, women are at higher risk of short-term readmission after an AMI hospitalization than men, particularly younger women. Sex-specific strategies to reduce these readmissions may be warranted.

Cardiac Biomarkers and the Diagnosis of Myocardial Infarction in Women

PURPOSE OF REVIEW

Women with suspected acute coronary syndrome are less likely to undergo investigation or receive treatment than men, and women consistently have poorer outcomes. This review summarises how the latest development in cardiac biomarkers could improve both diagnosis and outcomes in women.

RECENT FINDINGS

Novel high-sensitivity cardiac troponin assays have identified differences in the reference range and therefore diagnostic threshold for myocardial infarction in men and women. These differences are present across multiple populations with different ethnic backgrounds and for a range of assays. The use of a uniform threshold for cardiac troponin does not provide equivalent prediction in men and women, with lower thresholds needed for women to provide comparable risk stratification. Sex differences in cardiac troponin concentrations are not widely recognised in clinical practice and may be contributing to the under-diagnosis of myocardial infarction in women and discrepancies in patient care and outcomes.

Controversies in the Treatment of Women with ST-Segment Elevation Myocardial Infarction

Coronary artery disease is the leading cause of death in women. Women with ST-segment elevation myocardial infarctions continue to have worse outcomes compared with men despite advancements in therapies. Furthermore, these differences are particularly pronounced among young men and women with myocardial infarctions. Differences in the pathophysiology of coronary artery plaque development, disease presentation, and recognition likely contribute to these outcome disparities. Despite having worse outcomes compared with men, women clearly benefit from aggressive treatment and the latest therapies. This article reviews the treatment options for ST-segment elevation myocardial infarctions and the outcomes of women after treatment with reperfusion therapies.

Perceptions and Experiences of Heart Disease: A Literature Review and Identification of a Research Agenda in Older Women

BACKGROUND

Following diagnosis of heart disease women have poorer health related outcomes compared with men. Nursing science lacks well-evaluated interventions to address the specific rehabilitative needs of older women with heart disease. This paper seeks to inform the development of nursing intervention studies by a review of published studies on the experiences and rehabilitative needs of older women with heart disease.

METHODS

The CINAHL, MEDLINE, FAMILY and PsychINFO databases were searched, identifying literature published from 1982 and written in English. Keywords used were women, old* (old, older) women, elderly women and: heart disease, heart failure, cardiac and rehabilitation. Hand searching of nursing and medical textbooks also occurred. These searches resulted in over 120 articles that met the criteria of describing experiences, perceptions, psychological responses and support rehabilitative needs of older women.

RESULTS

Older women present with symptoms that are different from those derived from a male-dominated research agenda and further there is a paucity of data related to evaluation of interventions tailored to the needs of women. Key themes emerging from the literature review include not only that older women compared with men have a poorer prognosis and experience greater disability moreover they: (1). are at a higher risk of psychosocial distress; (2). have a greater need for instrumental support and social support; (3). have an altered perception of risk; and (4). demonstrate the need for specific rehabilitation programs, tailored to their needs.

CONCLUSION

Future research should develop and evaluate intervention studies that better meet the unique needs of older women with heart disease. Particular emphasis needs to be on psychosocial aspects, given evidence that identify these are major concerns for women.

Temporal trends in medical therapies for ST- and non-ST elevation myocardial infarction: (from the Atherosclerosis Risk in Communities [ARIC] Surveillance Study)

Reports from large studies using administrative data sets and event registries have characterized recent temporal trends and treatment patterns for acute myocardial infarction. However, few were population based, and fewer examined differences in patterns of treatment for patients presenting with ST-segment elevation myocardial infarction (STEMI) and non-ST-segment elevation myocardial infarction (NSTEMI). The aim of this study was to examine 22-year trends in the use of 10 medical therapies and procedures by STEMI and NSTEMI classification in 30,986 definite or probable myocardial infarctions in the Atherosclerosis Risk in Communities (ARIC) Community Surveillance Study from 1987 to 2008. Weighted multivariate Poisson regression, controlling for gender, race and center classification, age, and Predicting Risk of Death in Cardiac Disease Tool score, was used to estimate average annual percentage changes in medical therapy use. From 1987 to 2008, 6,106 hospitalized events (19.7%) were classified as STEMIs and 20,302 (65.5%) as NSTEMIs. Among patients with STEMIs, increases were noted in the use of angiotensin-converting enzyme inhibitors (6.4%, 95% confidence interval [CI] 5.7 to 7.2), antiplatelet agents other than aspirin (5.0%, 95% CI 4.0% to 6.0%), lipid-lowering medications (4.5%, 95% CI 3.1% to 5.8%), β blockers (2.7%, 95% CI 2.4% to 3.0%), aspirin (1.2%, 95% CI 1.0% to 1.3%), and heparin (0.8%, 95% CI 0.4% to 1.3%). Among patients with NSTEMIs, the use of angiotensin-converting enzyme inhibitors (5.5%, 95% CI 5.0% to 6.1%), antiplatelet agents other than aspirin (3.7%, 95% CI 2.7% to 4.7%), lipid-lowering medications (3.0%, 95% CI% 1.9 to 4.1%), β blockers (4.2%, 95% CI 3.9% to 4.4%), aspirin (1.9%, 95% CI 1.6% to 2.1%), and heparin (1.7%, 95% CI 1.3% to 2.1%) increased. Among patients with STEMIs, decreases in the use of thrombolytic agents (-7.2%, 95% CI -7.9% to -6.6%) and coronary artery bypass grafting (-2.4%, 95% CI -3.6% to -1.2%) were observed. Similar increases in percutaneous coronary intervention and decreases in the use of thrombolytic agents and coronary artery bypass grafting were noted among all patients. In conclusion, trends of increasing use of evidence-based therapies were found for patients with STEMIs and those with NSTEMIs over the past 22 years.

Interventions for ST Elevation Myocardial Infarction in Women

The management of ST-segment elevation myocardial infarction (STEMI) has significantly advanced from supportive care to reperfusion therapies with thrombolytics and percutaneous coronary revascularization techniques. These advances have improved the outcomes of patients with STEMI. Although cardiovascular disease is the leading cause of death in both men and women, the minority of patients in trials studying the impact of these therapies on outcomes are women. Multiple studies have shown that men and women do not have equivalent outcomes after STEMI. This article reviews the treatment options for STEMI and the outcomes of women after treatment with reperfusion therapies.

Gender-based differences in the management and prognosis of acute coronary syndrome in Korea

PURPOSE

Gender-based differences exist in the characteristics, management, and prognosis of acute coronary syndrome (ACS). However, their impact on prognosis remains unclear. We aimed to identify factors causing these differences in Koreans.

MATERIALS AND METHODS

We examined 6,636 ACS patients (66.2% males) visiting 72 Korean hospitals between April-2007 and December-2008. Gender-based differences in clinical demographics, therapy, and outcomes were analyzed over 6 months.

RESULTS

Women were older than men [mean (standard deviation, SD) age, 67.6 (9.8) vs. 60.6 (11.2) years; p<0.001]; had higher rates of hypertension, diabetes mellitus, and lack of exercise (p<0.001 for all); and lower rates of obesity, familial history of cardiovascular disease (CVD), and smoking (p<0.05 for all). Atypical symptoms were more common in women (20.5% vs. 15.1% in men, p<0.001), whereas myocardial infarction with ST-segment elevation was less common (17.1% vs. 27.8%, p<0.001). Mean (SD) time lapse from symptom onset to arrival at hospital was longer in women [11.44 (18.19) vs. 8.26 (14.89) hours in men, p<0.001], as was the duration of hospitalization [7.58 (7.61) vs. 7.04 (7.72) days, p=0.007]. Fewer women underwent revascularization procedures, including thrombolytic therapy, balloon angioplasty, stent implantation, and coronary artery bypass grafting (79.4% vs. 83.3% men, p<0.001). No significant differences were observed in CVD-related death, recurrent ACS, stroke, refractory angina, or rehospitalization for angina.

CONCLUSION

Female ACS patients were older than male subjects and had more atypical presentation. They arrived at the hospital later than men and had longer hospital stays, but less often required revascularization therapy. However, no gender-based differences were noted in ACS-related mortality and morbidity.

Gender differences in the surgical management and early clinical outcome of coronary artery disease: Single centre experience

OBJECTIVE

To investigate the gender disparity in the distribution of patient-related risk factors and their effect on the surgical management and clinical outcome of coronary artery disease in Saudi population.

MATERIALS AND METHODS

We carried out a retrospective analysis of prospectively collected data of 971 patients undergoing isolated coronary artery bypass grafting (CABG) at our institution between January 2005 and December 2008. Seven hundred and eighty seven patients (81%) were males and 184 patients (19%) were females. We analyzed gender-based difference in clinical presentation and patient-related pre-operative risk factors and studied their impact on surgical management and clinical outcome.

RESULTS

The mean age was 59.5 years in males and 63.4 years in females (p = <0.0001). Associated co-morbidities were higher in females. Prevalence of diabetes mellitus was 61.2% in males and 78.8% in females (p-value = <0.0001); hypertension 61.9% in males and 79.9% in females (p-value <0.0001); hyperlipidemia 66.7% in males and 77.7% in females (p-value 0.0035); morbid obesity 24.7% in males and 45.1% in females (p-value <0.0001); and Hypothyroidism 2.5% in males and 13.6% in females (p-value <0.0001). Smoking was the only risk factor with higher prevalence in males compared to females (44.2% v/s 2.2%; p-value <0.0001). The mean logistic euroSCORE was 3.94 in males and 5.51 in females (p < 0.0003). On-pump and off-pump CABG was carried out in equal numbers in two groups. Females required urgent surgery and less than 3 grafts more frequently while males underwent elective surgery and more than 3 grafts in greater numbers. No significant difference was present between the two gender groups in aortic occlusion times and bypass times. Univariant analysis revealed females gender as an independent risk factor for higher in-hospital mortality (1.1% versus 4.9% p = 0.0026) and higher incidence of post-operative complications like surgical wound infection, need for prolonged ventilation, low cardiac output state and multi-organ failure (p-values 0.01 or less).

CONCLUSION

Female gender is an independent predictor of adverse outcome after isolated CABG due to significantly higher co-morbidities and acute presentation and independent of their peri-operative management. Therefore, major socioeconomic education and preventive measures are needed to reduce the burden of major co-morbidities in females and to seek early cardiac advice and care.

Gender disparity in cardiac procedures and medication use for acute myocardial infarction

OBJECTIVE

Determine if gender bias is present in contemporary management of acute myocardial infarction (AMI).

BACKGROUND

Despite major advances in medicine, disparities in healthcare still persist. Previous studies on gender bias in the diagnosis and treatment of AMI are inconsistent and may not represent more contemporary practice.

METHODS AND RESULTS

Data were collected from the Minnesota Heart Survey, a population-based study of patients presenting with AMI in 2001-02. In-hospital diagnostic and therapeutic approaches were compared between women and men using logistic regression models. We identified 1242 women and 1378 men with an AMI defined by either positive cardiac biomarkers or ST-elevation on electrocardiogram. There were no differences in the prescription of aspirin, beta-blockers, ACE inhibitors or angiotensin receptor blockers. Women were 46% less likely than men to undergo investigative coronary angiography [OR = 0.54 (0.45-0.64)]. After accounting for confounders, women remained less likely to be referred for angiography [OR = 0.73 (0.57-0.94)]. Revascularization rates, were similar between women and men [OR = 0.96 (0.72-1.28)]. However, women were more likely to undergo PCI [OR = 1.41 (1.07-1.86)] whereas men were more likely to have coronary artery bypass grafting (CABG) [OR = 0.57 (0.39-0.84)]. When severity of coronary artery disease (CAD) was incorporated into the model, gender no longer influenced the modality of coronary revascularization.

CONCLUSIONS

There is no evidence of gender bias in the pharmacologic treatment of AMI. Evidence of gender bias persists in the referral of patients for coronary angiography but not in the subsequent use of coronary revascularization.

The Implementation of Guidelines and Prognosis among Patients with Acute Coronary Syndromes Is Influenced by Physicians’ Perception of Antecedent Physical and Cognitive Status

BACKGROUND/AIMS

Physicians' perception of antecedent physical/cognitive status may account for the suboptimal implementation of acute coronary syndrome (ACS) guidelines.

METHODS

In an ACS survey of all cardiac wards, physicians' perception of antecedent physical/cognitive status was prospectively recorded and categorized as either normal, mildly impaired or significantly impaired. We examined the impact of antecedent status on the use of evidence-based medications and procedures and on mortality.

RESULTS

Of the 2,021 patients, 1,025 (51%) had ST elevation. Impaired antecedent physical/cognitive status was diagnosed in 417 patients (20.6%), more commonly among non-ST-elevation patients (26.2 vs. 15.2%). Patients with impaired physical/cognitive status, with or without ST elevation, had significantly worse baseline demographic and clinical characteristics. They less often received aspirin, clopidogrel, platelet glycoprotein IIb/IIIa receptor antagonists, statins and beta-adrenergic blockers, and significantly less often underwent in-hospital catheterization and revascularization. Reperfusion treatment was given significantly less frequently to ST elevation patients with impaired status (63.0% for normal vs. 50.8% and 33.3% for mildly and significantly impaired status, respectively; p = 0.001). After adjustment for differences in baseline characteristics, impaired antecedent status remained independently associated with lower use of these therapies and higher mortality rates.

CONCLUSIONS

ACS guideline implementation is significantly influenced by physicians' perception of antecedent physical/cognitive status, and thus is a crucial parameter for understanding ACS management and outcomes.

Prognostic impact of demographic factors and clinical features on the mode of death in high-risk patients after myocardial infarction--a combined analysis from multicenter trials

BACKGROUND

Contemporary information is lacking on the effect of demographic features and clinical features on the specific mode of mortality after myocardial infarction (MI) in the thrombolytic era.

HYPOTHESIS

The aims of this study were (1) to examine the risk and trend of a different mode of mortality (i.e., all-cause, arrhythmic, and nonarrhythmic cardiac mortality) in high-risk patients post MI with reduced left ventricular ejection fraction (LVEF) or ventricular arrhythmias; and (2) to assess the predictive value of demographic and clinical variables in the prediction of specific modes of death in high-risk patients post MI in the thrombolytic era.

METHODS

In all, 3,431 patients receiving placebo (2,700 men, median age 64 +/- 11 years) from the EMIAT, CAMIAT, SWORD, TRACE, and DIAMOND-MI studies, with LVEF < 40% or ventricular arrhythmia were pooled. Risk factors for mortality among patients surviving > or = 45 days after MI up to 2 years were examined using Cox regression. Short-term survival (from onset of MI to Day 44 after MI) was also examined for TRACE and DIAMOND-MI, in which patients were recruited within 2 weeks of MI.

RESULTS

After adjustment for treatment and study effects, age, previous MI/angina, increased heart rate, and higher New York Heart Association functional class increased the risk of all-cause, arrhythmic, and cardiac mortality. Male gender, history of hypertension, low baseline systolic blood pressure, and Q wave were predictive of all-cause and arrhythmic mortality, whereas diabetes was only predictive of all-cause mortality. Smoking habit and atrial fibrillation had no prognostic value. Similar parameters were also predictive of short-term mortality, but not identical.

CONCLUSIONS

Our study has shown that in high-risk patients post MI, who have been preselected using LVEF or frequent ventricular premature beats, demographic and clinical features are powerful predictors of mortality in the thrombolytic era. We propose that demographic and clinical factors should be considered when designing risk stratification or survival studies, or when identifying high-risk patients for prophylactic implantable cardiodefibrillator therapy.

Subgroup analyses in therapeutic cardiovascular clinical trials: are most of them misleading?

BACKGROUND

Treatment decisions in clinical cardiology are directed by results from randomized clinical trials (RCTs). We studied the appropriateness of the use and interpretation of subgroup analysis in current therapeutic cardiovascular RCTs.

METHODS

We reviewed main reports of phase 3 cardiovascular RCTs with at least 100 patients, published in 2002 and 2004, and from major journals (Circulation, J Am Coll Cardiol, Am Heart J, Am J Cardiol, N Engl J Med, Lancet, JAMA, BMJ, Ann Intern Med). Information on subgroups included prespecification, number, interaction test use, significant subgroups found, and emphasis on findings. We examined appropriateness of reporting and differences according to sample size, overall trial result, and CONSORT adoption.

RESULTS

We selected 63 RCTs, with a median of 496 (range 100-15,245) patients. Thirty-nine RCTs were reported with subgroup analyses and 26 with > 5 subgroups. No trial was specifically powered to detect subgroup effects, and only 14 RCTs were reported with fully prespecified subgroups. Only 11 RCTs were reported with interaction tests. Furthermore, 21 RCTs were reported with claims of significant subgroups and 15 with equal or more emphasis to subgroups than to the overall results. Subgroup analyses in large RCTs (> 500 patients) were reported more often than in small ones (24/30 vs 15/33, P = .005). No differences were found according to overall result (positive/negative) or CONSORT adoption.

CONCLUSIONS

Subgroup analyses in recent cardiovascular RCTs were reported with several shortcomings, including a lack of prespecification and testing of a large number of subgroups without the use of the statistically appropriate test for interaction. Reporting of subgroup analysis needs to be substantially improved because emphasis on these secondary results may mislead treatment decisions.

Gender differences in patients' attributions for myocardial infarction: implications for adaptive health behaviors

Attributions for myocardial infarction were studied in a patient sample (N = 157). Men and women were comparable at intake on age, health status, and lifestyle factors. Attributions to diet, chi2 (1, N = 157) = 8.83, p = .003, and exercise, chi2 (1, N = 157) = 6.60, p = .01, were less common among women than men. After 3 months (n = 136), women were less likely than men to report improving their diets or increasing exercise. Initial attributions predicted subsequent reports of behavior change in relevant domains. These findings suggest that gender differences in causal attributions for myocardial infarction may contribute to subsequent differences between men and women in health-related behavior change.

Outcomes of thrombolytic therapy for acute myocardial infarction in women

Coronary artery disease is the leading cause of mortality in women older than 50 years of age. Thrombolytic therapy substantially reduces mortality in both women and men with ST-elevation acute myocardial infarction. However, the mortality risk reduction is somewhat lower in women, in spite of similar rates of successful coronary reperfusion after thrombolytic therapy in women and men. Hemorrhagic complications including stroke and other major bleeding appear to be more common in women, particularly elderly women. The risk of reinfarction after thrombolytic therapy also is greater in women compared with men. Because of the higher complication rates, women should be monitored closely after thrombolytic therapy. However, this lifesaving treatment should not be withheld or delayed in women when indicated.

Benefits of direct angioplasty for women and men with acute myocardial infarction: results of the Global Use of Strategies to Open Occluded Arteries in Acute Coronary Syndromes Angioplasty (GUSTO II-B) Angioplasty Substudy

BACKGROUND

Direct angioplasty (PTCA) and thrombolytic therapy are the chief therapies for treating an ST-segment elevation myocardial infarction (MI).

OBJECTIVE

This study was designed to evaluate sex differences in the relative benefit of direct PTCA versus thrombolytic therapy among patients enrolled in the Global Use of Strategies to Open Occluded Arteries in Acute Coronary Syndromes Angioplasty (GUSTO II-B PTCA) Substudy.

METHODS

Women and men presenting with an acute ST-segment elevation MI were randomized to receive either direct PTCA or accelerated tissue plasminogen activator (t-PA). Patients were then randomized to treatment with either heparin or bivalirudin. A gender analysis of outcome was performed.

RESULTS

Women were older than men (68.6 +/- 11.5 vs 59.5 +/- 12.0 years, P <.001) and were more likely to have diabetes (22.5% vs 13.5%, P <.0001) and hypertension (53.3% vs 34.8%, P =.001). After adjusting for differences in baseline variables, the odds ratio (OR) for reaching a 30-day clinical end point (death, nonfatal infarction, or nonfatal disabling stroke) was similar for women and men (1.35, 95% CI 0.88-2.08). The OR for reaching a clinical end point at 30 days for the PTCA-treated women compared with the t-PA-treated women was 0.685 (95% CI 0.36-1.32) and similar to the OR in men, 0.565 (95% CI 0.35-0.91), P for interaction =.535. Because women had a higher event rate than men, the absolute number of major events prevented when treating women with direct PTCA was higher than men (56 events/1000 women treated with PTCA vs 42 events per 1000 men treated with PTCA).

CONCLUSIONS

Although the relative benefit of direct PTCA to t-PA for the treatment of an acute MI appears to be similar in women and men, women may derive a larger absolute benefit from direct PTCA.

Variation in hospital length of stay in patients with acute myocardial infarction undergoing primary angioplasty and the need to change the diagnostic-related group system

Our findings show significant variation in length of hospital stay among patients with acute myocardial infarction treated with primary percutaneous coronary intervention; length of stay can be predicted from baseline clinical and angiographic characteristics. Our investigation suggests the need for a multi-tier diagnostic-related group system for patients with acute myocardial infarction treated with percutaneous coronary intervention.

Does gender affect the clinical outcome of patients with acute myocardial infarction complicated by cardiogenic shock who undergo percutaneous coronary intervention?

This study sought to determine the impact of female gender on clinical outcome in patients with acute myocardial infarction (AMI) complicated by cardiogenic shock (CS) due to predominant ventricular failure undergoing percutaneous coronary intervention (PCI). We analyzed gender-related differences in procedural, angiographic, and clinical outcomes in 208 consecutive patients with AMI complicated by CS. Out of 208 patients with CS, 65 were women and 143 men. Women were older than men (74 +/- 10 years vs. 66 +/- 12 years; P < 0.001) and had a greater incidence of a history of hypertension (43% vs. 29%; P = 0.041). The 6-month mortality rate was 42% in women and 31% in men (P = 0.157). There were no differences between groups in reinfarction rate and target vessel revascularization rate. Multivariate analysis showed age as the only variable independently related to the 6-month mortality, while female gender was not related to the risk of death. The benefit of early PCI is similar in women and men, and any potential referral bias in the use of PCI based on gender differences should be avoided.

Women do have an improved long-term outcome after non-ST-elevation acute coronary syndromes treated very early and predominantly with percutaneous coronary intervention: a prospective study in 1,450 consecutive patients

OBJECTIVES

This study sought to assess gender-based differences in long-term outcome after very early aggressive revascularization for non-ST-elevation acute coronary syndromes (NSTACS).

BACKGROUND

The Fragmin and fast Revascularization during InStability in Coronary artery disease (FRISC) II study suggested that women have less to gain from an early invasive strategy.

METHODS

We conducted a prospective cohort study in 1,450 consecutive patients with NSTACS undergoing coronary angiography and subsequent coronary stenting of the culprit lesion as the primary revascularization strategy within 24 h of admission. The combined primary end point was defined as death or nonfatal myocardial infarction (MI) and recorded for a mean of 20 months.

RESULTS

Percutaneous coronary intervention was performed in more than 50% of patients in women and men and accompanied with stenting in 80%. The percutaneous coronary intervention:coronary artery bypass grafting ratio was 4:1 in men and 5:1 in women. The primary end point occurred in 29 (7.0%) women as compared with 108 (10.5%) men (hazard ratio for women, 0.65; 95% confidence interval [CI] 0.42 to 0.99; p = 0.045). Backward-stepwise multivariate Cox regression analysis identified female gender as an independent predictor of death or MI (hazard ratio for female gender, 0.51; 95% CI, 0.28 to 0.92; p = 0.024). Kaplan-Meier analysis showed that women had consistently lower event rates during the entire follow-up period (p = 0.037 by log-rank for death or MI).

CONCLUSIONS

Women treated with very early aggressive revascularization with coronary stenting of the culprit lesion as the primary revascularization strategy have a better long-term outcome as compared with men.

Effects of gender on the number of diseased vessels and clinical outcome in Japanese patients with acute coronary syndrome

It has been reported that women with acute myocardial infarction (AMI) have a higher short-term mortality rate than men, but the reason is unclear and it is not known if it also applies to unstable angina pectoris (UAP). In addition, most previous studies have not presented angiographic findings. In the present study, the findings from 1,408 patients with AMI (group A: 361 women, 1,047 men) and 332 patients with UAP (group B: 103 women, 229 men) who underwent coronary angiography within 30 days of onset were analyzed. In both groups, the women were older and had a higher rate of hypertension and a lower rate of smoking than the men. There was no significant difference in Killip class or the number of diseased vessels between the women and men in both groups. Interventions (coronary angioplasty and coronary artery bypass grafting) were performed less frequently in the women than in the men (87.2% vs 91.8%, p=0.04) in group A, but not in group B (80.6% vs 81.2%, NS). In both groups, the overall mortality rate during hospitalization was higher in women than in men (group A: 14.4% vs 7.4%, p<0.0001, group B: 7.8% vs 1.7%, p=0.007). Multivariate analysis revealed that female gender was an independent predictor of in-hospital mortality in group B (odds ratio (OR): 6.4, 95% confidence interval (CI) 1.1-37.0, p=0.04), but not in group A (OR: 1.7, 95%CI 0.98-2.9, p=0.06). The independent predictors of in-hospital mortality, other than female gender were age, prior congestive heart failure, prior cerebrovascular disease and a higher Killip class in group A, and in both groups a higher number of diseased vessels. In conclusion, Japanese women with acute coronary syndromes present with similar angiographic findings and hemodynamics, but have a higher in-hospital mortality than male patients. Our results suggest that older age may be a potential explanation for the higher in-hospital mortality in women with AMI, but female gender itself may be an important predictor for it among those with UAP.

Absence of gender differences in clinical outcomes in patients with cardiogenic shock complicating acute myocardial infarction. A report from the SHOCK Trial Registry

OBJECTIVES

The aim of this study was to assess the impact of gender on clinical course and in-hospital mortality in patients with cardiogenic shock (CS) complicating acute myocardial infarction (AMI).

BACKGROUND

Previous studies have demonstrated higher mortality for women compared with men with ST elevation myocardial infarctions and higher rates of CS after AMI. The influence of gender and its interaction with various treatment strategies on clinical outcomes once CS develops is unclear.

METHODS

Using the SHould we emergently revascularize Occluded Coronaries for cardiogenic shocK? (SHOCK) Registry database of 1,190 patients with suspected CS in the setting of AMI, we examined shock etiologies by gender. Among the 884 patients with predominant left ventricular (LV) failure, we compared the patient demographics, angiographic and hemodynamic findings, treatment approaches as well as the clinical outcomes of women versus men. This study had a 97% power to detect a 10% absolute difference in mortality by gender.

RESULTS

Left ventricular failure was the most frequent cause of CS for both gender groups. Women in the SHOCK Registry had a significantly higher incidence of mechanical complications including ventricular septal rupture and acute severe mitral regurgitation. Among patients with predominant LV failure, women were, on average, 4.6 years older, had a higher incidence of hypertension, diabetes and a lower cardiac index. The overall mortality rate for the entire cohort was high (61%). After adjustment for differences in patient demographics and treatment approaches, there was no significant difference in in-hospital mortality between the two gender groups (odds ratio = 1.03, 95% confidence interval of 0.73 to 1.43, p = 0.88). Mortality was also similar for women and men who were selected for revascularization (44% vs. 38%, p = 0.244).

CONCLUSIONS

Women with CS complicating AMI had more frequent adverse clinical characteristics and mechanical complications. Women derived the same benefit as men from revascularization, and gender was not independently associated with in-hospital mortality in the SHOCK Registry.

Percutaneous coronary revascularisation in women

Numerous studies of sex differences in morbidity and mortality after an episode of acute coronary disease shown unclear results. In particular is not clear if women undergoing coronary revascularization procedures have adverse in-hospital and long-term outcomes compared with men. Recent clinical trial have provided new insights into this problem. The influence on gender differences for the decision to undertake coronary angiography and percutaneous transluminal coronary angioplasty will be discussed.

Gender differences and temporal trends in clinical characteristics, stress test results and use of invasive procedures in patients undergoing evaluation for coronary artery disease

OBJECTIVES

This study examined gender differences and temporal changes in the clinical characteristics of patients referred for nuclear stress imaging, their imaging results and subsequent utilization of coronary angiography and revascularization.

BACKGROUND

Gender bias may influence resource utilization in patients with coronary artery disease (CAD). No study has analyzed gender differences and time trends in patients referred for noninvasive testing and subsequent use of invasive procedures.

METHODS

Between January 1986 and December 1995, 14,499 patients (5,910 women and 8,589 men) without established CAD underwent stress myocardial perfusion imaging. The clinical characteristics, imaging results, coronary angiograms and revascularization outcomes were compared in women and men over time.

RESULTS

The mean pretest probability of CAD was lower in women (45%) than in men (70%) (p < 0.001). More women (69%) than men (42%) had normal nuclear images (p < 0.001). Men (17%) were more likely than women (8%) to undergo coronary angiography (p < 0.001). Male gender was independently associated with referral for coronary angiography (multivariate model: chi-square = 16, p < 0.001) but was considerably weaker than the imaging variables (summed reversibility score: chi-square = 273, p < 0.001). Revascularization was performed in more men (46% of the population undergoing angiography) than women (39%) (p = 0.01), but gender was not independently associated with referral to revascularization. There were no significant differences in clinical, imaging or invasive variables between the genders over time.

CONCLUSIONS

There was little evidence for a bias against women in this study. Women were somewhat less likely to undergo coronary angiography but were referred for stress perfusion imaging more liberally. Practice patterns remained constant over this 10-year period.

Reasons for higher in-hospital mortality >24 hours after percutaneous transluminal coronary angioplasty in women compared with men

Women have a higher in-hospital mortality rate than men after percutaneous transluminal coronary angioplasty (PTCA). To determine reasons for this, we analyzed the outcome of PTCA at our institution from 1989 to 1995 for 5,989 patients (2,101 women). Women were older than men (66.8 +/- 10.9 vs 61.0 +/- 11.2 years, respectively; p <0.0001) and more likely to have diabetes mellitus, hypertension, or a history of congestive heart failure than men. In-laboratory complications at the time of PTCA were similar for women and men. During the first 24 hours after PTCA, women were more likely than men to become hypotensive (0.33% vs 0.08%, p = 0.04) and had a higher rate of vascular injury than men (1.6% vs 0.6%, p <0.001). More than 24 hours after the procedure, women had a significantly higher mortality rate (1.2% vs 0.52%, p = 0.017), which was no longer significantly different after adjustment for age (odds ratio 0.72, 95% confidence interval 0.39 to 1.32). Multivariate correlates of death >24 hours after PTCA were age, a prior history of congestive heart failure, vascular injury, and use of thrombolytic agents. Of those dying >24 hours after the procedure, 67% of women suffered a noncardiac-related death compared with only 10% of men (p <0.001). The noncardiac death rate was 0.8% for women and 0.05% for men. These deaths were related to renal failure, vascular complications, bleeding, hypotension, and stroke, especially hemorrhagic stroke. In conclusion, immediate procedural complications at PTCA were similar for women and men; however, mortality was higher for women >24 hours after PTCA and before discharge due to a higher rate of noncardiac death.

Sex-based differences in clinical and angiographic outcomes after primary angioplasty or stenting for acute myocardial infarction

A paucity of data exists on the importance of gender in contributing to the mortality rate after primary angioplasty, although it is has been shown that women with acute myocardial infarction (AMI) are less likely than men to undergo reperfusion treatments. This study analyzes gender-related differences in 6-month clinical and angiographic outcomes in nonselected patients with AMI who underwent primary angioplasty or stenting. We compared clinical and angiographic outcomes of 230 women and 789 men who underwent primary angioplasty or stenting from January 1995 to August 1999. The women were older than the men, and had a greater incidence of diabetes and cardiogenic shock. The 6-month mortality rate was 12% in women and 7% in men (p = 0.028). Nonfatal reinfarction occurred in 3% of the women and in 1% of the men (p = 0.010). There were no differences in repeat target vessel revascularization rates. After multivariate analysis, gender did not emerge as a significant variable in relation to 6-month mortality or to the combined end point of death, reinfarction, and repeat target vessel revascularization. Both women and men with stented infarct arteries had lower restenosis rates (29% and 26%, respectively) than patients without stents (52% and 39%, repectively). The results of outcome analysis in nonselected patients suggest that sex is not an independent predictor of mortality after primary angioplasty for AMI, and that the benefit of primary stenting is similar in men and women.

Long-term effects of bisoprolol compared with imidapril on left ventricular remodeling after reperfusion in acute myocardial infarction: an angiographic study in patients with maintained vessel patency

BACKGROUND

Although angiotensin-converting enzyme inhibitor attenuates ventricular enlargement, whether beta-blocker therapy induces regression of left ventricular remodeling is not known. The purpose of this study was to compare the effects of bisoprolol therapy with those of imidapril therapy on left ventricular remodeling after acute myocardial infarction (AMI).

METHODS

Sixty patients with AMI who underwent reperfusion therapy were randomly assigned to an imidapril group (20 patients), a bisoprolol group (20 patients), or a control group (20 patients). Administration was started within 24 hours. Left ventricular function on admission and 3 months and 1 year after AMI was investigated.

RESULTS

Baseline characteristics on admission were similar in the 3 groups except for sex distribution. Mean pulmonary capillary wedge pressure and left ventricular end-diastolic pressure in the bisoprolol group were higher than those in the imidapril group 1 year after admission (pulmonary capillary wedge pressure: 12 +/- 7 vs 8 +/- 2 mm Hg, left ventricular end-diastolic pressure: 17 +/- 8 vs 11 +/- 4 mm Hg, P <. 01). Left ventricular end-diastolic volume index (EDVI) increased in the bisoprolol group throughout the 1-year period (P <.01), whereas EDVI in the imidapril group decreased (P <.01). The increases in EDVI during 1 year in the bisoprolol group were greater than those of the other 2 groups (bisoprolol: 12 +/- 10, imidapril: -9 +/- 7, control: 4 +/- 11 mL/m2, P <.01).

CONCLUSIONS

Early treatment with bisoprolol in AMI cannot prevent left ventricular remodeling, whereas imidapril attenuates left ventricular dilation by decreasing preload.

Sex differences in management and outcome after acute myocardial infarction in the 1990s: A prospective observational community-based study. Israeli Thrombolytic Survey Group

BACKGROUND

Previous studies have suggested that women with acute myocardial infarction (AMI) are less aggressively managed than are men. The aim of this study was to assess sex differences in medical and invasive coronary procedures (angiography, PTCA, and CABG) in AMI patients admitted to cardiac care units (CCUs) in Israel in the mid 1990s and their association with early and 1-year prognosis.

METHODS AND RESULTS

We studied 2867 consecutive AMI patients (2125 men, 74%) hospitalized in all 25 CCUs in Israel from 3 prospective nationwide surveys conducted in 1992, 1994, and 1996. Women were, on average, older than men (69 versus 61 years, P:<0.0001) and had a higher prevalence of hypertension, diabetes, Killip class >/=II on admission, and in-hospital complications. Women received aspirin and beta-blockers less often than did men, but these differences were not significant after age adjustment. The unadjusted rates of thrombolysis, angiography, and PTCA/CABG use were lower in women than in men but not after covariate adjustment: 42% versus 48% (adjusted odds ratio [OR] 0.92, 95% CI 0.77 to 1.11), 23% versus 31% (OR 0.88, 95% CI 0.70 to 1.09), and 15% versus 19% (OR 0.93, 95% CI 0.72 to 1.19), respectively. The 30-day mortality was higher in women than in men (17.6% versus 9.6%, respectively; OR 1.39, 95% CI 1.06 to 1.82), but the 30-day to 1-year mortality rate was not (9.1% versus 5.6%, respectively; hazard ratio 1.18, 95% CI 0.84 to 1.66).

CONCLUSIONS

This prospective nationwide observational community-based study of consecutive AMI patients hospitalized in the CCUs in the mid 1990s indicates that women fare significantly worse than do men at 30 days but not thereafter at 1-year. The difference in 30-day outcome was not influenced by the use of different therapeutic modalities, including thrombolysis and invasive coronary procedures, but was rather due to the older age and greater comorbidity of women; these findings seem also to explain the less frequent use of invasive procedures in women.

Comparison of modes of death and cardiac necropsy findings in fatal acute myocardial infarction in men and women >75 years of age

In comparing the cause of death and other cardiac morphologic findings among 60 women and 40 men aged >75 years who died of acute myocardial infarction, we found that women died more often from mechanical complications than left ventricular pump failure. Women had cardiomegaly, nonanterior location of acute myocardial infarction, healed myocardial infarcts, and dilated left ventricular cavity less often than men.

Does gender bias exist in the use of specialist health care?

OBJECTIVES

To investigate the evidence for the existence of gender bias (defined as care provided independently of clinical need) in the use of specialist services by critically appraising the literature.

METHODS

A computer-assisted search of the bibliographic databases PubMed, Medline, EMBASE, Healthstar and Social Science Citation Index for English language papers published from 1966 until May 1999. In addition, four journals were handsearched and the reference lists of identified papers were explored. Retrospective studies were only used when there were insufficient prospective studies.

RESULTS

One hundred and thirty-eight studies were identified covering five major topics: coronary artery disease; renal transplantation; human immunodeficiency virus (HIV) and acquired immune deficiency syndrome (AIDS); mental illness; and other (mainly invasive) procedures. The majority (94) examined coronary artery disease. It appears that men are more likely to undergo non-invasive investigations than women, but that subsequent investigation and treatment shows no clear evidence of gender differences. Men are more likely to undergo renal transplantation and, for those with HIV and AIDS, to receive azidothymidine (zidovudine, AZT) than women. There are some indications that disparities in favour of men also occur for those suffering from cardiac arrhythmias and cerebrovascular disease, and for those undergoing vascular surgery, hip replacement and heart transplantation. In contrast, women are more likely to undergo liver transplantation and cataract surgery. Mental health services may be provided differently for men and women. All these findings are limited by a lack of accurate denominator information and insufficient ability to adjust for prognostic factors.

CONCLUSIONS

Differences in health care use can be due to demand factors (e.g. differences in the prevalence and severity of disease or in patient preferences), supply factors (particularly clinical judgement), or both. There is a need to examine these explanations thoroughly for gender inequalities in order to ensure that equity (lack of bias) is achieved. There is also a need for higher quality studies if differences are to be attributed conclusively to bias or not.

Myocardial infarction in women: a critical appraisal of gender differences in outcomes

In every year since 1984, cardiovascular disease has claimed the lives of more women than men. Data from randomized trials indicate that gender contributes to increased mortality after myocardial infarction independent of other risk factors, but additional confounding variables cannot be discounted. Data from registry databases indicate that women are less likely to receive medically proven therapies for myocardial infarction. Women experience more vague symptoms, which may account for underuse of effective therapies. In addition, they may benefit less from thrombolytic therapy than men. Increased use of thrombolytic therapy has resulted in a continued decrease in cardiovascular deaths for men, but not for women. It is unclear if this disparity is a result of inequitable access to therapy or decreased efficacy of these agents in women.

Treatment of acute myocardial infarction and 30-day mortality among women and men

BACKGROUND

Previous studies have suggested that women with acute myocardial infarction receive less aggressive therapy than men. We used data from the Cooperative Cardiovascular Project to determine whether women and men who were ideal candidates for therapy after acute myocardial infarction were treated differently.

METHODS

Information was abstracted from the charts of 138,956 Medicare beneficiaries (49 percent of them women) who had an acute myocardial infarction in 1994 or 1995. Multivariate analysis was used to assess differences between women and men in the medications administered, the procedures used, the assignment of do-not-resuscitate status, and 30-day mortality.

RESULTS

Among ideal candidates for therapy, women in all age groups were less likely to undergo diagnostic catheterization than men. The difference was especially pronounced among older women; for a woman 85 years of age or older, the adjusted relative risk was 0.75 (95 percent confidence interval, 0.68 to 0.83). Women were somewhat less likely than men to receive thrombolytic therapy within 60 minutes (adjusted relative risk, 0.93; 95 percent confidence interval, 0.90 to 0.96) or to receive aspirin within 24 hours after arrival at the hospital (adjusted relative risk, 0.96; 95 percent confidence interval, 0.95 to 0.97), but they were equally likely to receive beta-blockers (adjusted relative risk, 0.99; 95 percent confidence interval, 0.95 to 1.03) and somewhat more likely to receive angiotensin-converting-enzyme inhibitors (adjusted relative risk, 1.05; 95 percent confidence interval, 1.02 to 1.08). Women were more likely than men to have a do-not-resuscitate order in their records (adjusted relative risk, 1.26; 95 percent confidence interval, 1.22 to 1.29). After adjustment, women and men had similar 30-day mortality rates (hazard ratio, 1.02; 95 percent confidence interval, 0.99 to 1.04).

CONCLUSIONS

As compared with men, women receive somewhat less aggressive treatment during the early management of acute myocardial infarction. However, many of these differences are small, and there is no apparent effect on early mortality.

Race and sex differences in the management of coronary artery disease

Although numerous studies have documented race and sex differences in the treatment of coronary artery disease, the available analyses have not been comprehensively evaluated. In this review, we summarize prior estimates of race and sex disparities in the utilization of standard tests and therapies, and we evaluate studies of factors that may contribute to gaps in care. The studies presented consistently demonstrate that blacks and women with coronary artery disease, compared with whites and men, are substantially less likely to receive standard interventions. Studies also indicate that racial differences relate in part to socioeconomic factors, process-of-care variables, and patient preferences, whereas sex differences relate in part to clinical factors. In both cases, however, our understanding is limited by deficiencies in currently available datasets. Moreover, factors that have been shown to contribute to race and sex disparities in medical care fail to explain them fully. In both cases, physician decision-making appears to contribute as well, suggesting that subconscious biases may contribute to treatment disparities. We conclude by proposing initiatives to remedy race and sex disparities in medical care. Efforts should focus on increasing physician awareness of this problem. Studies should gather data that are currently unavailable for analysis, including detailed clinical variables and patient-level socioeconomic information. Finally, novel quality assurance programs, designed to evaluate and improve the care of blacks and women with coronary artery disease, should be promptly undertaken.

Marked improvement in survival after acute myocardial infarction in middle-aged men but not in women. The Northern Sweden MONICA study 1985-94

OBJECTIVES

The aim of this study was to analyse time trends in survival after acute myocardial infarction with special emphasis on sex differences.

DESIGN

Within the framework of the population-based WHO MONICA Project, all acute myocardial infarction events were recorded in the age group 25-64 years in northern Sweden during the period 1985-94. All first-ever myocardial infarction patients were followed for information on vital status.

SUBJECTS

A total of 3397 men and 860 women with acute myocardial infarction, during the period between 1985 and 1994.

MAIN OUTCOME MEASURES

Case fatality rates after first-ever acute myocardial infarction.

RESULTS

When compared with the 1985-86 cohort, the age-adjusted odds ratio for death within 1 year after acute myocardial infarction was 0.59 (95% CI 0.46-0.76) in the 1993-94 male cohort but 0.99 (95% CI 0.61-1.60) in the female 1993-94 cohort. Corresponding age-adjusted proportions of death within 1 year were 33.3% and 22.9% in men and 27.5% and 27.3% in women in 1985-86 and 1993-94, respectively. The odds ratio for 3-year case fatality amongst those who survived the first 28 days was 0.34 (95% CI 0.21-0.55) in 1991-92 compared with 1985-86 in men and 0.91 (0.43-1.94) in women.

CONCLUSION

Both short- and long-term survival after AMI have improved markedly in men over the last decade. There is a disturbing sex difference in that, during the same period, survival in women with AMI has not improved at all. This sex difference was not explained by differences in conventional prognostic factors.

Gender differences in the management and outcome of acute myocardial infarction in unselected patients in the thrombolytic era

This study compares the clinical features, management, and outcome in men and women from a consecutive, unselected series of patients with acute myocardial infarction (AMI) who were admitted to a university cardiac center over a 3-year period. It is a retrospective observational study of 1,059 admissions with AMI identified through the Hospital In-Patient Enquiry (HIPE) registry, validated according to Minnesota Manual criteria, and followed for a period of up to 5 years (median 36 months). Women comprised 40% of all admissions, had a higher hospital mortality (24% vs. 16%, p<0.001), and were less likely to receive thrombolysis (23% vs. 33%, p<0.01), admission to coronary care (65% vs. 77%, p<0.001), or subsequent invasive or noninvasive investigations (55% vs. 63%, p<0.01). However, women with AMI were older than men with AMI (71 vs. 65 years, p<0.001). After adjusting for age, differences that remained significant were prevalence of hypertension (odds ratio [OR] 2.12, 95% confidence intervals [CI] 1.56 to 2.88) and cigarette smoking (OR 0.47, 95% CI 0.35 to 0.65), management in coronary care (OR 0.66, 95% CI 0.49 to 0.88), and hospital mortality (OR 1.48, 95% CI 1.07 to 2.04). Excess mortality occurred predominantly in women <65 years old (18% vs. 8%, OR [multivariate] 2.35, 95% CI 1.19 to 4.56), among whom multivariate analysis demonstrated a significantly lower thrombolysis rate (OR 0.48, 95% CI 0.27 to 0.86). In this group, lack of thrombolysis independently predicted hospital mortality (OR 5.37, 95% CI 1.45 to 19.82). Female gender was not an independent predictor of mortality following AMI (OR 1.42, 95% CI 0.90 to 2.26). Thus, among unselected patients, female gender is associated with, but not an independent predictor of, reduced survival after AMI. Gender differences in mortality are greatest in younger patients, who are less likely to receive thrombolysis and in whom lack of thrombolysis is independently associated with mortality after AMI.

Risk stratification after acute myocardial infarction in the reperfusion era

Historically, risk stratification for survivors of acute myocardial infarction (AMI) has centered on 3 principles: assessment of left ventricular function, detection of residual myocardial ischemia, and estimation of the risk for sudden cardiac death. Although these factors still have important prognostic implications for these patients, our ability to predict adverse cardiac events has significantly improved over the last several years. Recent studies have identified powerful predictors of adverse cardiac events available from the patient history, physical examination, initial electrocardiogram, and blood testing early in the evaluation of patients with AMI. Numerous studies performed in patients receiving early reperfusion therapy with either thrombolysis or primary angioplasty have emphasized the importance of a patent infarct related artery for long-term survival. The predictive value of a variety of noninvasive and invasive tests to predict myocardial electrical instability have been under active investigation in patients receiving early reperfusion therapy. The current understanding of the clinically important predictors of clinical outcomes in survivors of AMI is reviewed in this article.

Sex and race differences in short-term prognosis after acute coronary heart disease events: the Atherosclerosis Risk In Communities (ARIC) study

BACKGROUND

Case fatality after myocardial infarction (MI) among patients admitted to the hospital may differ between men and women and blacks and whites. Furthermore, a different pattern of sex and race differences in case fatality may occur when coronary deaths outside the hospital are included in the analysis. The ARIC study provides community-based data to examine 28-day case fatality rates after coronary heart disease (CHD) events.

METHOD AND RESULTS

Surveillance of out-of-hospital CHD deaths and hospitalized MI was conducted in 4 U.S. communities from 1987 to 1993. Hospital discharges and death certificates were sampled, medical records abstracted, and interviews conducted with witnesses of out-of-hospital deaths. MI and out-of-hospital death classifications followed a standard algorithm. Linkage of hospitalized MIs to fatality within 28 days ensured complete ascertainment of case fatality rate. Comorbidities and complications during hospital stay were compared to assess possible explanatory factors for differences in case fatality. Overall, age-adjusted 28-day case fatality (MI plus CHD) was higher in black men compared with white men (odds ratio 1.78, 95% confidence interval 1.4-2.2) and in black women compared with white women (odds ratio 1.5, 95% confidence interval 1. 2-2.0). Although men had higher overall case fatality rates than did women, this difference was not statistically significant. After a hospitalized MI, 28-day case fatality rate was not statistically significantly different between men compared with women or blacks compared with whites.

CONCLUSION

Race and sex differences in case fatality after hospitalized MI were not evident in these data, although when out-of-hospital deaths were included, men and blacks were more likely than women and whites to die within 28 days of an acute cardiac event. A majority of deaths occurred before hospital admission, and additional study of possible reasons for these differences should be a priority.

Long-term nitrate use may be deleterious in ischemic heart disease: A study using the databases from two large-scale postinfarction studies. Multicenter Myocardial Ischemia Research Group

BACKGROUND

Secondary coronary prevention studies have generally focused on specific medications, often to the exclusion of commonly used therapies. To date, long-term nitrate use has not been investigated in large-scale clinical trials.

METHODS AND RESULTS

We examined the relation between long-acting nitrates given during the chronic phase of the disease and the outcome. We analyzed data prospectively acquired in a large, observational study involving 1042 patients enrolled for the Multicenter Study of Myocardial Ischemia (MSMI) in North America, Israel, and Japan as well as 1779 patients enrolled for the Multicenter Diltiazem Post Infarction Trial (MDPIT). The Cox analyses with all the variables retained revealed that nitrates were associated with a significantly increased mortality risk (MSMI: hazard ratio 3.78, P =.011; MDPIT: hazard ratio 1.61, P =.019) in patients who had recovered from an acute coronary event. The analyses with the propensity score method on the MSMI and the MSMI databases also showed that the risk for cardiac death with use of nitrates was increased in most of the 5 subclasses according to the score.

CONCLUSION

These analyses raise concern about the potential adverse effects of long-acting nitrate therapy in chronic coronary disease.

Saruplase is a safe and effective thrombolytic agent; observations in 1,698 patients: results of the PASS study. Practical Applications of Saruplase Study

Saruplase (unglycosylated human-type high molecular weight single-chain urokinase-type plasminogen activator) was given to 1698 patients in the open-label Practical Applicability of Saruplase Study (PASS), which assessed the safety and efficacy of saruplase in the treatment of acute myocardial infarction. Thirty-seven hospitals in Europe participated in the study. All patients received 20 mg saruplase as a bolus followed by an infusion of 60 mg saruplase over 1 hour. Prior to the infusion of saruplase, 62% of the patients received a bolus of 5000 U of heparin, and after saruplase a 24-hour intravenous infusion of heparin was given to 95% of patients. The mean age of the patients was 59 years and 80.1% were male. The median delay from the onset of chest pain to the start of saruplase infusion was 145 minutes. Acute angiography was performed in 8 of the participating 37 centers in 350 patients (20.6%), on average 85 minutes (median) after the start of the saruplase infusion. TIMI 3 flow was obtained in 186 patients (53.1%) and TIMI 2 flow in 61 patients (17.4%). Patency rates were similar for patients with anterior and inferior infarction. ECG signs suggestive of reperfusion were seen in 63% of the patients. In-hospital mortality was low (92 patients; 5.4%), and nonfatal recurrent myocardial infarction was seen in 60 patients (3.5%). Severe bleeding complications occurred in 92 patients (5.4%), 21 of whom (1.2%) needed a blood transfusion. An intracerebral hemorrhage was observed in eight patients (0.5%), and seven patients (0.4%) suffered from a thromboembolic stroke. At discharge 85.9% of the patients were in NYHA functional class I. One-year mortality was low (142 patients; 8. 4%). Mortality was high in patients with TIMI 0 or 1 flow at the acute angiography who did not undergo rescue PTCA (9/39; 23.1%), lower in patients with TIMI 0 or 1 flow followed by successful rescue PTCA (7/64; 10.9%), and low in patients with TIMI 2 flow (1/61; 1.6%) or with TIMI 3 flow (2/186; 1.1%). Patency rates and (bleeding) complications did not differ between patients with a body weight greater than or less than 70 kilograms. No antibodies against saruplase were detected in samples from 455 patients. In conclusion, it can be stated that saruplase, given in combination with aspirin and intravenous heparin, can be given safely and effectively to patients with acute myocardial infarction.

Sex, clinical presentation, and outcome in patients with acute coronary syndromes. Global Use of Strategies to Open Occluded Coronary Arteries in Acute Coronary Syndromes IIb Investigators

BACKGROUND

Studies have reported that women with acute myocardial infarction have in-hospital and long-term outcomes that are worse than those of men.

METHODS

To assess sex-based differences in presentation and outcome, we examined data from the Global Use of Strategies to Open Occluded Coronary Arteries in Acute Coronary Syndromes IIb study, which enrolled 12,142 patients (3662 women and 8480 men) with acute coronary syndromes, including infarction with ST-segment elevation, infarction with no ST-segment elevation, and unstable angina.

RESULTS

Overall, the women were older than the men, and had significantly higher rates of diabetes, hypertension, and prior congestive heart failure. They had significantly lower rates of prior myocardial infarction and were less likely ever to have smoked. A smaller percentage of women than men had infarction with ST elevation (27.2 percent vs. 37.0 percent, P<0.001), and of the patients who presented with no ST elevation (those with myocardial infarction or unstable angina), fewer women than men had myocardial infarction (36.6 percent vs. 47.6 percent, P<0.001). Women had more complications than men during hospitalization and a higher mortality rate at 30 days (6.0 percent vs. 4.0 percent, P<0.001) but had similar rates of reinfarction at 30 days after presentation. However, there was a significant interaction between sex and the type of coronary syndrome at presentation (P=0.001). After stratification according to coronary syndrome and adjustment for base-line variables, there was a nonsignificant trend toward an increased risk of death or reinfarction among women as compared with men only in the group with infarction and ST elevation (odds ratio, 1.27; 95 percent confidence interval, 0.98 to 1.63; P=0.07). Among patients with unstable angina, female sex was associated with an independent protective effect (odds ratio for infarction or death, 0.65; 95 percent confidence interval, 0.49 to 0.87; P=0.003).

CONCLUSIONS

Women and men with acute coronary syndromes had different clinical profiles, presentation, and outcomes. These differences could not be entirely accounted for by differences in base-line characteristics and may reflect pathophysiologic and anatomical differences between men and women.

Hospital mortality of acute myocardial infarction in the thrombolytic era

OBJECTIVE

To examine the management and outcome of an unselected consecutive series of patients admitted with acute myocardial infarction to a tertiary referral centre.

DESIGN

A historical cohort study over a three year period (1992-94) of consecutive unselected admissions with acute myocardial infarction identified using the HIPE (hospital inpatient enquiry) database and validated according to MONICA criteria for definite or probable acute myocardial infarction.

SETTING

University teaching hospital and cardiac tertiary referral centre.

RESULTS

1059 patients were included. Mean age was 67 years; 60% were male and 40% female. Rates of coronary care unit (CCU) admission, thrombolysis, and predischarge angiography were 70%, 28%, and 32%, respectively. Overall in-hospital mortality was 18%. Independent predictors of hospital mortality by multivariate analysis were age, left ventricular failure, ventricular arrhythmias, cardiogenic shock, management outside CCU, and reinfarction. Hospital mortality in a small cohort from a non-tertiary referral centre was 14%, a difference largely explained by the lower mean age of these patients (64 years). Five year survival in the cohort was 50%. Only age and left ventricular failure were independent predictors of mortality at follow up.

CONCLUSIONS

In unselected consecutive patients the hospital mortality of acute myocardial infarction remains high (18%). Age and the occurrence of left ventricular failure are major determinants of short and long term mortality after acute myocardial infarction.

Time-trends in thrombolytics: women are catching up

Reports on gender differences in the management of acute coronary syndromes indicate that women do not receive as much active treatment as men. Other conflicting findings have also been published. To investigate whether previously reported gender differences in the treatment of acute myocardial infarction (AMI) still persist, we included all patients admitted to our coronary care unit (CCU) in 1984-1995, and discharged with a diagnosis of AMI, in a retrospective study. A total of 1991 female admissions was compared with 4067 male admissions. The time-span was divided into two-year periods comprising approximately 1000 patients each. During one period, 1988 to 1989, women received significantly less thrombolytic therapy which, however, could reflect that women admitted with AMI were older than men. Analysis of time-trends showed a significant increase in the use of thrombolytic treatment in women and elderly men. In clinical praxis there has been a gender-gap in acute treatment of AMI, but age-dependent or not, this is now no longer apparent.

Management and outcome of acute myocardial infarction in older patients in the thrombolytic era

OBJECTIVE

Acute myocardial infarction (AMI) is an important cause of mortality and morbidity in older patients. The aim of this study was to determine the proportion of unselected admissions with AMI that is older than 75 years and to examine management and outcomes in this group.

DESIGN

An historical cohort study of consecutive unselected admissions with AMI identified using the Hospital In Patient Enquiry (HIPE) database and validated according to MONICA criteria for definite or probable AMI.

SETTING

An acute cardiac unit in a university teaching hospital/cardiac tertiary referral center.

RESULTS

Of 1059 patients, 606 (57%) were older than 65 years and 309 (29.2%) were older than 75 years. Mean age in this group was 80.5 years. Hospital mortality was almost twice as high as in patients younger than 75 years (28% vs 15%, P < .001), and age was an independent predictor of short- and long-term mortality following AMI. Women constituted a significantly higher proportion of older patients. Family history of AMI and cigarette smoking were less prevalent in older patients. Mean cholesterol was lower and comorbidities were higher. Other baseline characteristics, including previous AMI, did not differ. However older patients were less likely to receive thrombolysis (13% vs 36%, P < .001), aspirin (76% vs 86%, P < .01), or beta-blockers (25% vs 51%, P < .001) and were less likely to undergo cardiac catheterization or revascularization. Only 53% were admitted to coronary care.

CONCLUSION

Patients more than age 75 comprise almost one-third of patients with AMI and have a poor prognosis. Although age is an independent predictor of mortality following AMI, suboptimal management may contribute to the high mortality in these patients.

Gender differences in mortality after myocardial infarction. Why women fare worse than men

Several studies have indicated that women sustaining a myocardial infarction have a higher unadjusted short-term (i.e., in-hospital or 30-day) mortality than men. The advanced age of women at the time of presentation appears to be the major factor contributing to their worse prognosis relative to men. Controlling for age eliminates the association between female gender and increased mortality in most, but not all studies. This article reviews the data on age and other factors that might explain why women with a myocardial infarction fare worse then men.

[Differential characteristics and survival of women with acute myocardial infarction. Registry of Acute Myocardial Infarctions of the City of Valencia (RICVAL). Researchers of the RICVAL]

INTRODUCTION AND OBJECTIVES

The prevalence of women who are admitted to the hospital after acute myocardial infarction is lower to that of men and their prognosis is worse. The reason for these differences is unclear. We studied the demographic and historical variables, the evolution, treatment and early survival in 269 women included in the Register of Acute Myocardial Infarctions of the City of Valencia (RICVAL) and compared them with the 855 men included in the same Register.

PATIENTS AND METHODS

Register of patients admitted into a Coronary Care Unit in the City of Valencia since December, 1st, 1993 until November 30th, 1994.

RESULTS

23.9% of the patients were women with a mean age of 71.9 +/- 9 years; 46.8% of them were diabetics, 55.4% hypertensives, and 6.7% smokers. The women arrived for treatment later than men and 34.9% of them were thrombolised. The incidence in women of severe heart failure (Killip III and IV) was 40.1% and the mortality 29.7%. In women with thrombolytic treatment the mortality was 29.8%. In the logistic regression model performed, female sex predicted a higher mortality rate (odds ratio [OR] = 1.30; confidence interval [CI], 1.05-1.61).

CONCLUSIONS

Early mortality in women after acute myocardial infarction is higher than in men in the RICVAL Register. The longer delay in initiating medical care and thrombolysis might be the cause for the higher proportion of heart failure among women and explain their worse prognosis after an acute myocardial infarction compared to men.

[Clinical prediction of the early prognosis in acute myocardial infarct]

Several clinical factors can influence the pathophysiology, clinical course and prognosis of acute myocardial by different means. Some of them may be easily detected through the history, physical examination or ECG in an early phase. The knowledge of these factors may help the therapeutic decision making of patients with myocardial infarction. The influence for the main clinical factors (age, sex, risk factors, cardiologic antecedents and evolutive findings) on the short-term prognosis of acute myocardial infarction is reviewed. An analysis of the likely mechanisms of the influence of these factors on infarct prognosis is also performed.