Dispositional optimism and physical well-being: the influence of generalized outcome expectancies on health

This article explores the implications that dispositional optimism holds for physical well-being. Research is reviewed that links optimism to a number of different positive health-relevant outcomes, ranging from the development of physical symptoms to recovery from coronary artery bypass surgery. Additional findings are described which suggest that these beneficial effects are partly due to differences between optimists and pessimists in the strategies that they use to cope with stress. A number of other potential mediators are also discussed, including some that are physiologic in nature. The article closes with a discussion of the relationships between our own theoretical account of the effects of optimism and several other conceptual approaches.

Depression as a risk factor for mortality after coronary artery bypass surgery

BACKGROUND

Studies that have shown clinical depression to be a risk factor for cardiac events after coronary artery bypass graft (CABG) surgery have had small sample sizes, short follow-up, and have not had adequate power to assess mortality. We sought to assess whether depression is associated with an increased risk of mortality.

METHODS

We assessed 817 patients undergoing CABG at Duke University Medical Center between May, 1989, and May, 2001. Patients completed the Center for Epidemiological Studies-Depression (CES-D) scale before surgery, 6 months after CABG, and were followed-up for up to 12 years.

FINDINGS

In 817 patients there were 122 deaths (15%) in a mean follow-up of 5.2 years. 310 patients (38%) met the criterion for depression (CES-D > or =16): 213 (26%) for mild depression (CES-D 16-26) and 97 (12%) for moderate to severe depression (CES-D > or =27). Survival analyses, controlling for age, sex, number of grafts, diabetes, smoking, left ventricular ejection fraction, and previous myocardial infarction, showed that patients with moderate to severe depression at baseline (adjusted hazard ratio [HR] 2.4, [95% CI 1.4-4.0]; p=0.001) and mild or moderate to severe depression that persisted from baseline to 6 months (adjusted HR 2.2, [1.2-4.2]; p=0.015) had higher rates of death than did those with no depression.

INTERPRETATION

Despite advances in surgical and medical management of patients after CABG, depression is an important independent predictor of death after CABG and should be carefully monitored and treated if necessary.

Telephone-delivered collaborative care for treating post-CABG depression: a randomized controlled trial

CONTEXT

Depressive symptoms commonly follow coronary artery bypass graft (CABG) surgery and are associated with less positive clinical outcomes.

OBJECTIVE

To test the effectiveness of telephone-delivered collaborative care for post-CABG depression vs usual physician care.

DESIGN, SETTING, AND PARTICIPANTS

Single-blind effectiveness trial at 7 university-based and community hospitals in or near Pittsburgh, Pennsylvania. Participants were 302 post-CABG patients with depression (150, intervention; 152, usual care) and a comparison group of 151 randomly sampled post-CABG patients without depression recruited between March 2004 and September 2007 and observed as outpatients until June 2008.

INTERVENTION

Eight months of telephone-delivered collaborative care provided by nurses working with patients' primary care physicians and supervised by a psychiatrist and primary care physician from this study.

MAIN OUTCOME MEASURES

Mental health-related quality of life (HRQL) measured by the Short Form-36 Mental Component Summary (SF-36 MCS) at 8-month follow-up; secondary outcome measures included assessment of mood symptoms (Hamilton Rating Scale for Depression [HRS-D]), physical HRQL (SF-36 PCS), and functional status (Duke Activity Status Index [DASI]); and hospital readmissions.

RESULTS

The intervention patients reported greater improvements in mental HRQL (all P < or = .02) (SF-36 MCS: Delta, 3.2 points; 95% confidence interval [CI], 0.5-6.0), physical functioning (DASI: Delta, 4.6 points; 95% CI, 1.9-7.3), and mood symptoms (HRS-D: Delta, 3.1 points; 95% CI, 1.3-4.9); and were more likely to report a 50% or greater decline in HRS-D score from baseline (50.0% vs 29.6%; number needed to treat, 4.9 [95% CI, 3.2-10.4]) than usual care patients (P < .001). Men with depression were particularly likely to benefit from the intervention (SF-36 MCS: Delta, 5.7 points; 95% CI, 2.2-9.2; P = .001). However, the mean HRQL and physical functioning of intervention patients did not reach that of the nondepressed comparison group.

CONCLUSION

Compared with usual care, telephone-delivered collaborative care for treatment of post-CABG depression resulted in improved HRQL, physical functioning, and mood symptoms at 8-month follow-up.

TRIAL REGISTRATION

clinicaltrials.gov Identifier: NCT00091962.

Optimism and rehospitalization after coronary artery bypass graft surgery

OBJECTIVE

To determine whether optimism predicts lower rates of rehospitalization after coronary artery bypass graft surgery for the 6 months after surgery.

METHODS

A prospective, inception cohort design was used. The sample consisted of all consenting patients (N=309) from a consecutive series of patients scheduled for elective coronary artery bypass graft surgery at a large, metropolitan hospital in Pittsburgh, Pa. To be eligible, patients could not be scheduled for any other coincidental surgery (eg, valve replacement) and could not be in the cardiac intensive care unit or experiencing angina at the time of the referral. Participants were predominantly men (69.9%) and married (80.3%), and averaged 62.8 years of age. Recruitment occurred between January 1992 and January 1994.

RESULTS

Compared with pessimistic persons, optimistic persons were significantly less likely to be rehospitalized for a broad range of aggregated problems (including postsurgical sternal wound infection, angina, myocardial infarction, and the need for another bypass surgery or percutaneous transluminal coronary angioplasty) generally indicative of a poor response to the initial surgery (odds ratio=0.50, 95% confidence interval=0.33- 0.76; P=.001). The effect of optimism was independent of traditional sociodemographic and medical control variables, as well as independent of the effects of self-esteem, depression, and neuroticism. All-cause rehospitalization also tended to be less frequent for optimistic than for pessimistic persons (odds ratio=0.77, 95% confidence interval=0.57-1.05; P=.07).

CONCLUSIONS

Optimism predicts a lower rate of rehospitalization after coronary artery bypass graft surgery. Fostering positive expectations may promote better recovery.

Impact of cardiac rehabilitation on depression and its associated mortality

PURPOSE

Depression following major cardiac events is associated with higher mortality, but little is known about whether this can be reduced through treatment including cardiac rehabilitation and exercise training. We evaluated the impact of cardiac rehabilitation on depression and its associated mortality in coronary patients.

PATIENTS AND METHODS

We evaluated 522 consecutive coronary patients (381 men, 141 women; aged 64+/-10 years) enrolled in cardiac rehabilitation from January 2000 to July 2005 and a control group of 179 patients not completing rehabilitation. Depressive symptoms were assessed by questionnaire at baseline and following rehabilitation, and mortality was evaluated after a mean follow-up of 1296+/-551 days.

RESULTS

Prevalence of depressive symptoms decreased 63% following rehabilitation, from 17% to 6% (P <.0001). Depressed patients following rehabilitation had an over 4-fold higher mortality than nondepressed patients (22% vs 5%, P=.0004). Depressed patients who completed rehabilitation had a 73% lower mortality (8% vs 30%; P=.0005) compared with control depressed subjects who did not complete rehabilitation. Reductions in depressive symptoms and its associated mortality were related to improvements in fitness; however, similar reductions were noted in those with either modest or marked increases in exercise capacity.

CONCLUSION

In patients following major coronary events, cardiac rehabilitation is associated with both reductions in depressive symptoms and the excess mortality associated with it. Moreover, only mild improvements in levels of fitness appear to be needed to produce these benefits on depressive symptoms and its associated mortality.

Lack of social participation or religious strength and comfort as risk factors for death after cardiac surgery in the elderly

The purpose of this study was to examine the relationship of social support and religion to mortality after elective open heart surgery in older patients. Of the 232 patients included in the study, 21 died within 6 months of surgery. Three biomedical variables were significant predictors of mortality and selected as adjustment variables for a multivariate analysis: history of previous cardiac surgery; greater impairment in presurgery basic activities of daily living; and older age. Among the social support and religion variables, two were consistent predictors of mortality in the multivariate analyses: lack of participation in social or community groups and absence of strength and comfort from religion. These results suggest that in older persons lack of participation in groups and absence of strength and comfort in religion are independently related to risk for death during the 6-month period after cardiac surgery.

Psychosocial recovery from a cardiac event: the influence of perceived control

OBJECTIVE

To determine the relationship between patients' feelings of control at baseline and psychosocial recovery 6 months after their cardiac event.

PATIENTS

One hundred seventy-six patients who had had myocardial infarction, had undergone coronary artery bypass or both.

DESIGN

In this longitudinal, comparative survey patients with high perceptions of control were compared with those with low perceptions of control at baseline to determine differences in psychosocial recovery 6 months later.

OUTCOME MEASURES

Psychosocial recovery was operationalized as anxiety, depression, and hostility (measured by Multiple Affect Adjective Checklist) and overall psychosocial adjustment to illness (measured by Psychosocial Adjustment to Illness Scale).

RESULTS

Significant differences were seen in psychosocial recovery between patients with feelings of high control versus those with feelings of low control (p = 0.006). Patients with feelings of high control at baseline were less anxious (p = 0.002), less depressed (p = 0.001), less hostile (p = 0.02), and had better psychosocial adjustment (p = 0.009) at a 6-month follow-up than those with feelings of low control.

CONCLUSION

Feelings of perceived control are important for psychosocial recovery after a cardiac event.

Racial Profiling

Background— Although public release of quality information through report cards is intended to improve health care, there may be unintended consequences of report cards, such as physicians avoiding high-risk patients to improve their ratings. If physicians believe that racial and ethnic minorities are at higher risk for poor outcomes, report cards could worsen existing racial and ethnic disparities in health care.

Methods and Results— To investigate the impact of New York’s CABG report card on racial and ethnic disparities in cardiac care, we estimated differences in the use of CABG, PTCA, and cardiac catheterization between white versus black and Hispanic patients hospitalized for acute myocardial infarction in New York before and after New York’s first CABG report card was released, adjusting for patient and hospital characteristics and national changes in racial and ethnic disparities in cardiac care. The racial and ethnic disparity in CABG use significantly increased in New York immediately after New York’s CABG report card was released, whereas disparities did not change significantly in the comparison states. There was no differential change in racial and ethnic disparities between New York and the comparison states in the use of cardiac catheterization or PTCA after the CABG report card was released. Over time, this increase in racial and ethnic disparities decreased to levels similar to those before the release of report cards.

Conclusions— The release of CABG report cards in New York was associated with a widening of the disparity in CABG use between white versus black and Hispanic patients.

Measurement of post-operative cognitive dysfunction after cardiac surgery: a systematic review

Post-operative cognitive dysfunction (POCD) is a decline in cognitive function from pre-operative levels, which has been frequently described after cardiac surgery. The purpose of this study was to examine the variability in the measurement and definitions for POCD using the framework of a 1995 Consensus Statement on measurement of POCD. Electronic medical literature databases were searched for the intersection of the search terms 'thoracic surgery' and 'cognition, dementia, and neuropsychological test.' Abstracts were reviewed independently by two reviewers. English articles with >50 participants published since 1995 that performed pre-operative and post-operative psychometric testing in patients undergoing cardiac surgery were reviewed. Data relevant to the measurement and definition of POCD were abstracted and compared with the recommendations of the Consensus Statement. Sixty-two studies of POCD in patients undergoing cardiac surgery were identified. Of these studies, the recommended neuropsychological tests were carried out in less than half of the studies. The cognitive domains measured most frequently were attention (n=56; 93%) and memory (n=57; 95%); motor skills were measured less frequently (n=36; 60%). Additionally, less than half of the studies examined anxiety and depression, performed neurological exam, or accounted for learning. Four definitions of POCD emerged: per cent decline (n=15), standard deviation decline (n=14), factor analysis (n=13), and analysis of performance on individual tests (n=12). There is marked variability in the measurement and definition of POCD. This heterogeneity may impede progress by reducing the ability to compare studies on the causes and treatment of POCD.

Gender differences in recovery after coronary artery bypass surgery

OBJECTIVES

This study was designed to examine whether female gender is associated with poorer recovery after coronary artery bypass graft (CABG) surgery.

BACKGROUND

The risks and benefits associated with CABG surgery in women are not as well established as they are in men, and there are concerns that women may have worse outcomes. The recovery period after CABG (the first four to eight weeks after the surgery) is a vulnerable time, with higher risks of complications and hospital readmission. There is little information on patients' experiences during this phase, particularly among women.

METHODS

We prospectively followed 1,113 patients (804 men and 309 women) who underwent first CABG consecutively between February 1999 and February 2001. Patients were interviewed at baseline and between six and eight weeks after surgery. Clinical data were abstracted from medical records.

RESULTS

Compared with men, women were older and more often had unstable angina and congestive heart failure, lower physical function (PF), and more depressive symptoms in the month before surgery. At six to eight weeks after CABG surgery, after adjustment for baseline characteristics, the rate of hospital readmission was 20.5% in women and 11.0% in men (p = 0.005), and the mean number of physical symptoms and side effects was 2.5 in women and 2 in men (p = 0.0009). Whereas, on average, PF remained unchanged in men (an increase in score of 0.3 points, 95% confidence interval [CI], -1.1 to 1.8) and depressive symptoms improved (a decrease of 0.2 depressive symptoms, 95% CI, -0.4 to -0.04), women showed, on average, a 13-point decline in physical function (95% CI, -15.8 to -10.4) and an increase of 0.5 in depressive symptoms (95% CI, 0.1 to 0.9).

CONCLUSIONS

After CABG surgery, women have a more difficult recovery compared with men, which is not explained by illness severity, presurgery health status, or other patient characteristics.

Effects of cardiac rehabilitation and exercise training programs on depression in patients after major coronary events

To evaluate the effect of cardiac rehabilitation and exercise training on depression after major cardiac events, we studied 338 consecutive patients in whom a major cardiac event had occurred 4 to 6 weeks previously and who were participating in phase II cardiac rehabilitation consisting of 36 sessions over a 3-month period. Depressive symptoms and other behavioral characteristics and quality-of-life parameters were analyzed by validated questionnaire. Depression was prevalent in patients with coronary heart disease, occurring in 20% of the patients evaluated. At baseline, depressed patients had lower exercise capacity, reduced high-density lipoprotein cholesterol level, and higher triglyceride levels; had lower scores for mental health, energy or fatigue, general health, pain, overall function, well-being, and total quality of life; and had greater scores for somatization, anxiety, and hostility than those of nondepressed patients. After cardiac rehabilitation, depressed patients had marked improvements in depression scores and other behavioral parameters (anxiety, somatization, and hostility) and quality of life. Depressed patients also showed improved exercise capacity, percentage of body fat, and levels of triglycerides and high-density lipoprotein cholesterol. Depressed patients exhibited statistically greater improvements in certain behavioral and quality-of-life parameters than did nondepressed patients. Two thirds of the patients who were initially depressed resolved their symptoms by study completion. In conclusion, depression is reduced in patients with symptomatic coronary heart disease patients enrolled in cardiac rehabilitation. Greater emphasis is needed to ensure that depressed patients are referred to and attend formal cardiac rehabilitation programs after major cardiac events.

Social support and recovery from surgery

This study examined the relationship of naturally occurring social support from the spouse with the preoperative anxiety and postoperative recovery of 56 male coronary-bypass patients. Patients were divided into groups based on whether the overall quality of their marital relationship was perceived to be relatively good or bad at the time of surgery and on whether they received relatively high or low spouse support in the hospital (defined in terms of frequency of visits). A fifth group (n = 16), consisting of unmarried patients, enabled additional comparisons. The results indicated that, although groups were essentially equivalent in preoperative physical status, married patients who received higher hospital support took less pain medication and recovered more quickly than their low-support counterparts. In contrast, perceived quality of the marital relationship was a relatively insignificant factor. Speed of recovery for unmarried patients was generally slower than for married, high-support patients and faster than for married, low-support patients.

Psychosocial factors of coronary heart disease in women: a review

Although coronary heart disease is the leading cause of death in women in most industrialized countries, much less research has been carried out on this topic to date than in men. This article gives an overview of psychosocial factors of coronary heart disease in women, focussing on psychosocial risk factors for coronary heart disease in women such as socioeconomic status, employment status, chronic troubling emotions, social support and bereavement/widowhood. A second focus lies on psychosocial adjustment in women once coronary heart disease has become manifest, i.e. well-being, return to work, sexual activity and rehabilitation outcome after a myocardial infarction or coronary artery bypass grafting. Via a computerized literature research in Medline, Psychlit and Sociofile over the period 1980-1994 all studies on these topics were collected and reviewed. Comparatively more research has been undertaken on psychosocial risk factors for than on psychosocial adjustment to coronary heart disease in women. Low social class, low educational attainment, the double loads of work and family, chronic troubling emotions and lack of social support emerge as documented risk factors in women. Regarding psychosocial adjustment to coronary heart disease in women, there is a paucity of data, and studies including large samples of women and adjusting for gender are warranted. Psychosocial adjustment in women after a myocardial infarction seems to be worse than in men, whereas results on adjustment after coronary artery bypass grafting are inconclusive. Return to work rates after myocardial infarction or coronary artery bypass grafting are significantly lower in women than in men. Data on sexual activity of women after myocardial infarction or coronary artery bypass grafting are scarce, and there seems to be a complete lack of physician counseling on this topic. Studies on rehabilitation outcome report poorer programme uptake, poorer adherence and significantly higher drop-out rates for women than for men, yet those women who complete cardiac rehabilitation show the same or even greater functional improvements than men.

Exposure to high stress in the intensive care unit may have negative effects on health-related quality-of-life outcomes after cardiac surgery

OBJECTIVE

Up to 20% of patients do not show improvements in health-related quality of life (HRQL) after cardiac surgery, despite apparently successful surgical procedures. We sought to determine whether failed improvements in HRQL after cardiac surgery are associated with the development of traumatic memories and chronic stress states as a result of high perioperative stress exposure.

DESIGN

Prospective cohort study.

SETTING

A 10-bed cardiovascular intensive care unit of a tertiary care university hospital.

PATIENTS

A total of 148 cardiac surgical patients.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

The patients were evaluated for traumatic memories from postoperative treatment in the cardiovascular intensive care unit (defined as the subjective recollection of pain, respiratory distress, anxiety/panic, and nightmares), symptoms of chronic stress, including those of posttraumatic stress disorder, and HRQL preoperatively (at baseline) and at 6 months after cardiac surgery. A state of chronic stress was defined as the development of posttraumatic stress disorder at 6 months after surgery. Factors predicting the decline in HRQL were determined by multivariable linear regression. Twenty-seven patients (18.2%) had posttraumatic stress disorder at 6 months after cardiac surgery; seven of these patients (4.8%) had evidence of preexisting posttraumatic stress disorder before undergoing cardiac surgery. Patients with new posttraumatic stress disorder at 6 months after cardiac surgery had a significantly higher number of traumatic memories from postoperative treatment in the cardiovascular intensive care unit (p =.01). A multiple regression model included the number of traumatic memories from the intensive care unit and stress symptom scores at 6 months after heart surgery as predictors for variations in physical HRQL outcome scores (R2 =.30, p <.04). Stress symptom scores were the most significant predictors of mental health HRQL outcomes (R2 =.52, p <.01).

CONCLUSIONS

Exposure to high stress in the cardiovascular intensive care unit can have negative effects on HRQL outcomes of cardiac surgery.

Comparison of prevalence of symptoms of depression, anxiety, and hostility in elderly patients with heart failure, myocardial infarction, and a coronary artery bypass graft

OBJECTIVE

This study sought to compare the prevalence of anxiety, depression, and hostility among 3 clinically diverse elderly cardiac patient cohorts and a reference group of healthy elders.

METHODS

This was a multicenter, comparative study. A total of 1167 individuals participated: 260 healthy elders, and 907 elderly cardiac patients who were at least 3 months past a hospitalization (478 heart-failure patients, 298 postmyocardial infarction patients, and 131 postcoronary artery bypass graft patients). Symptoms of anxiety, depression, and hostility were measured using the Multiple Affect Adjective Checklist.

RESULTS

The prevalence of anxiety, depression, and hostility was higher in patients in each of the cardiac patient groups than in the group of healthy elders. Almost three quarters of patients with heart failure reported experiencing symptoms of depression, and the heart-failure group manifested the greatest percentage of patients with depressive symptoms.

CONCLUSIONS

The high levels of emotional distress common in cardiac patients are not a function of aging, because healthy elders exhibit low levels of anxiety, depression, and hostility.

Hostility, coronary heart disease, and total mortality: a 33-year follow-up study of university students

Hostility as measured by the Cook-Medley Hostility (HO) Scale on the Minnesota Multiphasic Personality Inventory has been suggested as a risk factor for coronary heart disease (CHD) and total mortality. This study tested the HO-CHD hypothesis in a sample of 1399 men who entered the University of Minnesota in 1953 and, as part of freshman orientation, completed the MMPI. Current health status was ascertained for 94% of the sample through telephone interviews 33 years later. Higher HO scores did not predict CHD mortality, CHD morbidity, or total mortality either before or after adjustment for baseline risk factors. Among the plausible explanations for these results are that (1) hostility is not a risk factor in all populations, (2) the HO scale at age 19 does not assess a stable psychological characteristic, or (3) the HO scale is not an adequate measure of hostility.

Vital exhaustion predicts new cardiac events after successful coronary angioplasty

Excessive tiredness is one of the most prevalent premonitory symptoms of myocardial infarction and sudden cardiac death. This state is labelled as vital exhaustion and consists of three components: fatigue, increased irritability, and demoralization. Vital exhaustion has been found to be an independent risk-indicator of myocardial infarction in one prospective study and several case-control studies. It is as yet unclear whether the association between vital exhaustion and future myocardial infarction can be explained by confounding of (subclinical) coronary artery disease. Therefore, the present study investigates the predictive value of vital exhaustion for the occurrence of new cardiac events after percutaneous transluminal coronary angioplasty (PTCA), while explicitly controlling for the severity of coronary artery disease. Patients with a successful PTCA were followed during 1.5 years. A new cardiac event was defined as present if one of the following end points occurred: cardiac death, myocardial infarction, coronary bypass surgery, repeat-PTCA, increase of coronary atherosclerosis, or new anginal complaints with documented ischemia. Vital exhaustion was assessed using the Maastricht Questionnaire two weeks after hospital discharge. Participants of the present study were 127 patients (mean age 55.6 +/- 9.1; 105 men, 22 women). Fifteen (35%) of the 43 exhausted patients experienced a new cardiac event, whereas 14 (17%) of the 84 not exhausted patients had a new cardiac event (OR = 2.7; CI = 1.1-6.3; p = .02). Multiple logistic regression analysis revealed that vital exhaustion continued to be of predictive value when other significant risk factors for new cardiac events were controlled for (i.e., severity of coronary artery disease and hypercholesterolemia).(ABSTRACT TRUNCATED AT 250 WORDS)

Presurgical depression predicts medical morbidity 6 months after coronary artery bypass graft surgery

OBJECTIVE

Depression has been related to poor medical prognosis in patients with coronary artery disease and to diminished quality of life after coronary artery bypass graft surgery (CABG). However, prior studies have not fully examined the impact of depression on medical outcomes after CABG. The purpose of this study was to determine the independent contribution of presurgical depression to short-term medical outcome after CABG.

METHODS

Medical, surgical, and psychosocial risk factors were assessed before surgery in 89 male veterans undergoing CABG. In addition, patients completed the Beck Depression Inventory. Medical, surgical, and psychological/quality-of-life outcomes were determined at 6 months of follow-up by telephone interview and review of medical records.

RESULTS

Of the 89 patients studied, 25 scored 10 or greater on the Beck Depression Inventory. The study population was dichotomized on the basis of this cutoff point. A medical prediction model was developed for each outcome of interest, based on the range of medical, surgical, and psychosocial risk indices assessed. The dichotomized depression index was added to these prediction models as a final step. This depression index was found to independently predict cardiac hospitalizations at 6 months (chi(2) = 4.24, p <.04), continued surgical pain at 6 months (chi(2) = 6.36, p <.01), and failure to return to previous activity at 6 months (chi(2) = 15.04, p <.0001). Presurgical depression also predicted depressed affect at 6 months (chi(2) = 13.16, p <.0003).

CONCLUSIONS

Depression is an important independent contributor to medical and psychosocial morbidity up to 6 months after CABG. These findings warrant replication with larger and more diverse populations.

Depression and anxiety and outcomes of coronary artery bypass surgery

Psychological and psychiatric disorders independently increase the risk of cardiovascular disease and worsen the prognosis in patients with established cardiovascular lesions. The objective of this literature review is to discuss recent data concerning the relationships between depression and anxiety and the outcomes of coronary artery bypass grafting. Pathophysiological hypotheses are put forward to explain observed links. We suggest recommendations aimed at improving the psychological evaluation and management of heart surgery candidates, as well as postbypass patients, in the hope of improving quality of life and cardiovascular outcomes in these patients.

Predictors of smoking cessation after coronary artery bypass graft surgery. Results of a randomized trial with 5-year follow-up

OBJECTIVE

To test the efficacy of a smoking cessation program for inpatients recovering from coronary artery bypass graft surgery and to identify predictors of cessation.

DESIGN

Randomized, controlled clinical trial.

SETTING

Postoperative cardiac surgery unit of a large teaching hospital.

PATIENTS

Patients scheduled for coronary artery bypass surgery by participating surgeons between 1 July 1986 and 1 July 1987 who had smoked 1 or more packs of cigarettes in the 6 months before admission. Of 120 eligible patients, 93 enrolled and 87 were discharged alive. All survivors were followed for at least 1 year; 94% were followed for a median of 5.5 years.

INTERVENTION

A three-session, nurse-delivered behavior modification program using a videotape and face-to-face counseling was compared to usual care.

MEASUREMENTS

Smoking status was assessed six times in the year after surgery and 5.5 years after surgery. Self-reported nonsmoking was validated by saliva cotinine assay 1 and 5.5 years after surgery.

RESULTS

No statistically significant differences were found between control (n = 43) and intervention (n = 44) groups at baseline. One and 5.5 years after hospital discharge, validated continuous nonsmoking rates were identical in intervention and control groups (51% at 1 year; 44% at 5.5 years). Multiple logistic regression identified four factors that were independently associated with nonsmoking for 1 year: fewer than 3 previous attempts to quit (odds ratio, 7.4; 95% Cl, 1.9 to 29.1); more than 1 week of preoperative nonsmoking (odds ratio, 10.0; Cl, 2.0 to 50.2); definite intention to quit smoking (odds ratio, 12.0; Cl, 2.6 to 55.1); and no difficulty not smoking in the hospital (odds ratio, 9.6; Cl, 1.8 to 52.2). Nonsmoking for 5.5 years was independently associated with two of these factors: fewer than three previous attempts to quit and intention to quit smoking after surgery. Cessation was not related to demographic factors, daily cigarette consumption, disease severity, hospital course, social support, or beliefs and attitudes.

CONCLUSIONS

Even without specific intervention, nearly one half of smokers quit for 5 years after coronary artery bypass surgery. A short inpatient education program did not increase this rate. Future efforts should target the time after discharge and focus on increasing motivation in patients who have repeatedly failed to quit.

Self-rated health and vital exhaustion, but not depression, is related to inflammation in women with coronary heart disease

Poor subjective well-being has been associated with increased coronary heart disease (CHD) morbidity and mortality in population-based studies and with adverse outcomes in existing CHD. Little is known about the mechanisms responsible for this association, but immune activity appears to be a potential pathway. Despite the growing evidence linking immune activity to subjective feelings, very few studies have examined patients with CHD, and the results are conflicting. We examined consecutive women patients hospitalized for acute myocardial infarction, and/or underwent percutaneous transluminal coronary angioplasty or coronary artery bypass grafting. We assessed depression, vital exhaustion, and self-rated health by questionnaires. Circulating levels of high-sensitivity C-reactive protein (hsCRP), interleukin-6 (IL-6), and interleukin-1 receptor antagonist (IL-1ra) concentrations were determined. After controlling for potential confounding factors there was a significant positive correlation between IL-6 levels and vital exhaustion and poor self-rated health. The association between hsCRP and vital exhaustion and self-rated health was borderline significant. In contrast, the correlations between psychological factors and IL-1ra levels were weak and non-significant, as were the correlations between inflammatory markers and depression. Similar relationships between the inflammatory markers and the measures of psychological well-being were obtained when the latter ones were categorized into tertiles. In conclusion, inflammatory activity, assessed by IL-6 and hsCRP levels, was associated with vital exhaustion and self-rated health in CHD women. These findings may provide further evidence for a possible psychoneuroimmune link between subjective well-being and CHD. Our observations also raise the possibility that a cytokine-induced sickness response in CHD may be better represented by constructs of vital exhaustion and self-rated health than of depression.

Neuropsychologic impairment after coronary bypass surgery: effect of gaseous microemboli during perfusionist interventions

OBJECTIVE

Neuropsychologic impairment is a common complication of coronary bypass surgery. Cerebral microemboli during cardiopulmonary bypass are the principal cause of cognitive deficits after coronary bypass grafting. We have previously demonstrated that the majority of cerebral emboli occur during perfusionist interventions (ie, during the injection of air into the venous side of the cardiopulmonary bypass circuit). The purpose of this study was to determine whether an increase in perfusionist interventions is associated with an increased risk of postoperative cognitive impairment.

METHODS

Patients undergoing elective coronary artery bypass grafting (n = 83) underwent a battery of neuropsychologic tests preoperatively and 3 months postoperatively. Patients were divided into 2 groups according to the median value of perfusionist interventions during cardiopulmonary bypass. Group 1 patients (n = 42) had fewer than 10 perfusionist interventions, and group 2 patients (n = 41) had 10 or more interventions.

RESULTS

The 2 groups of patients were similar for all preoperative, intraoperative, and postoperative variables, with the exception of longer cardiopulmonary bypass times in group 2 patients (P <.001). Group 2 patients had lower mean scores on 9 of 10 neuropsychologic tests, with 3 (Rey Auditory Verbal Learning, Digit Span, and Visual Span) being statistically significant. Group 2 patients had worse cognitive test scores, even when controlling for increased bypass times. Group 2 patients had a nonsignificant trend toward an increased prevalence of neuropsychologic impairment 3 months postoperatively.

CONCLUSIONS

Introduction of air into the cardiopulmonary bypass circuit by perfusionists, resulting in cerebral microembolization, may contribute to postoperative cognitive impairment.