Panic disorder in cardiac outpatients

The association between panic disorder and coronary artery disease among primary care patients presenting with chest pain: an updated literature review

CONTEXT

Although panic disorder is linked to hypertension and smoking, the relationship between panic disorder and coronary artery disease (CAD) is unclear.

OBJECTIVE

To extend our understanding about the strength of the association between panic disorder and coronary artery disease and known cardiovascular risk factors.

DATA SOURCES

Potential studies were identified via a computerized search of MEDLINE and PsycINFO databases and review of bibliographies. MeSH headings used included panic disorder with chest pain, panic disorder with coronary disease or cardiovascular disorders or heart disorders, and panic disorder with cholesterol or essential hypertension or tobacco smoking.

STUDY SELECTION

The diagnosis of panic disorder in eligible studies was based on DSM-IV criteria, and studies must have used objective criteria for CAD and risk factors. Only case-control and cohort studies were included.

DATA SYNTHESIS

Concerning the relationship between panic disorder and CAD, studies conducted in emergency departments found a relative risk [RR] of 1.25 (95% CI = 0.87 to 1.80), while those conducted in cardiology settings found an inverse relationship (RR = 0.19, 95% CI = 0.10 to 0.37). However, there is an inverse relationship between the prevalence of CAD in the study and the RR (r = -.554, p = .097), suggesting that, in primary care settings in which the prevalence of CAD is low, there may be a significant association between panic disorder and CAD.

CONCLUSION

The association between panic disorder and CAD has several implications for primary care physicians managing patients with chest pain. When comorbid, the panic attacks may cause the patient with coronary disease to seek care but could also provoke a cardiac event. If one condition is recognized, a search for the other may be warranted because of the potential consequences if left undetected. The treatment approach to the panic disorder should be adjusted in the presence of comorbid CAD.

High phobic anxiety is related to lower leukocyte telomere length in women

Background

Chronic psychological distress has been linked to shorter telomeres, an indication of accelerated aging. Yet, little is known about relations of anxiety to telomeres. We examined whether a typically chronic form of anxiety – phobic anxiety – is related to telomere length.

Methodology/Principal Findings

Relative telomere lengths (RTLs) in peripheral blood leukocytes were measured by quantitative real-time polymerase chain reaction among 5,243 women (aged 42–69 years) who: were participants in the Nurses' Health Study; were controls in prior case-control studies of telomeres and disease, or randomly selected healthy participants in a cognitive function sub-study; had completed the Crown-Crisp phobic index proximal to blood collection. Adjusted least-squares mean RTLs (z-scores) were calculated across phobic categories. Higher phobic anxiety was generally associated with lower RTLs (age-adjusted p-trend = 0.09); this association was similar after adjustment for confounders – paternal age-at-birth, smoking, body mass index (BMI) and physical activity (p-trend = 0.15). Notably, a threshold was identified. Among women with Crown-Crisp<6 points, the multivariable-adjusted least-squares mean RTL z-score = 0.02 standard units; however, among the most phobic women (Crown-Crisp≥6), the multivariable-adjusted least-squares mean RTL z-score = −0.09 standard units (mean difference = −0.10 standard units; p = 0.02). The magnitude of this difference was comparable to that for women 6 years apart in age. Finally, effect modification by BMI, smoking and paternal age was observed: associations were stronger among highly phobic women with BMI≥25 kg/m², without smoking history, or born to fathers aged ≥40 years.

Conclusions/Significance

In this large, cross-sectional study high phobic anxiety was associated with shorter telomeres. These results point toward prospective investigations relating anxiety to telomere length change.

Comorbid physical health conditions and anxiety disorders: a population-based exploration of prevalence and health outcomes among older adults

OBJECTIVE

The primary objectives of this study were to examine the likelihood of anxiety disorders among respondents with common physical health conditions and to explore the associations between this comorbidity and older adults' perceived mental and physical health.

METHOD

The sample consisted of older adults from the Canadian Community Health Survey 1.2 (n=12,792). Trained lay interviewers assessed psychiatric disorders based on the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, criteria. Physical health conditions were based on self-reported diagnoses by health professionals. Multiple logistic regressions examined whether suffering from a physical health condition increased the odds of any assessed anxiety disorder (panic, agoraphobia, social phobia and posttraumatic stress disorder). Multiple linear regressions examined associations between self-rated health and comorbid physical health conditions and anxiety.

RESULTS

After adjusting for confounding variables, the presence of chronically painful conditions (i.e., arthritis, back pain and migraine) and of other commonly occurring diseases (i.e., allergies, cataracts and gastrointestinal, lung and heart disease) were positively associated with anxiety. The comorbidity of anxiety with allergies, cataracts, arthritis and lung disease resulted in poorer self-rated physical and/or mental health after adjusting for confounding variables.

CONCLUSION

Health problems in older adults are associated with increased odds of anxiety, and this comorbidity is associated with poorer self-reported health than medical problems or anxiety alone. These findings have important clinical implications for health professionals.

Comparing Two Brief Psychological Interventions to Usual Care in Panic Disorder Patients Presenting to the Emergency Department with Chest Pain

Background: Panic disorder (PD) is a common, often unrecognized condition among patients presenting with chest pain to the emergency departments (ED). Nevertheless, psychological treatment is rarely initiated. We are unaware of studies that evaluated the efficacy of brief cognitive-behavioural therapy (CBT) for this population. Aim: Evaluate the efficacy of two brief CBT interventions in PD patients presenting to the ED with chest pain. Method: Fifty-eight PD patients were assigned to either a 1-session CBT-based panic management intervention (PMI) (n = 24), a 7-session CBT intervention (n = 19), or a usual-care control condition (n = 15). A structured diagnostic interview and self-reported questionnaires were administered at pre-test, post-test, 3- and 6-month follow-ups. Results: Statistical analysis showed significant reduction in PD severity following both interventions compared to usual care control condition, but with neither showing superiority compared to the other. Conclusions: CBT-based interventions as brief as a single session initiated within 2 weeks after an ED visit for chest pain appear to be effective for PD. Given the high prevalence of PD in emergency care settings, greater efforts should be made to implement these interventions in the ED and/or primary care setting.

Life events in panic disorder-an update on "candidate stressors"

Studies on gene-environment interactions in mental disorders are characterized by powerful genetic techniques and well defined "candidate genes," whereas a definition of "candidate stressors," in most cases assessed in the form of life events (LEs), is inconsistent or not even provided. This review addresses this problem, with particular attention to the clinical phenotype of panic disorder (PD), by providing an overview and critical discussion for which life events are known to contribute to the etiology of the disease and how they may be conceptualized. There is converging evidence for a significant impact of cumulative as well as specific life events, such as threat, interpersonal and health-related events in adulthood, and abuse or loss/separation experiences in childhood, respectively, on the pathogenesis of panic disorder with some overlapping effect across the anxiety disorder spectrum as well as on comorbid major depression. Besides genetic vulnerability factors, personality and behavioral characteristics, such as anxiety sensitivity, neuroticism, and cognitive appraisal might moderate the influence of LEs on the development of panic disorder. The present state of knowledge regarding the specification and conceptualization of LEs in PD within a more complex multifactorial model, involving mediating and moderating factors in between genes and the clinical phenotype, is hoped to aid in informing future gene-environment interaction studies in panic disorder.

Anxiety disorders in older adults: a comprehensive review

This review aims to address issues unique to older adults with anxiety disorders in order to inform potential changes in the DSM-V. Prevalence and symptom expression of anxiety disorders in late life, as well as risk factors, comorbidity, cognitive decline, age of onset, and treatment efficacy for older adults are reviewed. Overall, the current literature suggests: (a) anxiety disorders are common among older age individuals, but less common than in younger adults; (b) overlap exists between anxiety symptoms of younger and older adults, although there are some differences as well as limitations to the assessment of symptoms among older adults; (c) anxiety disorders are highly comorbid with depression in older adults; (d) anxiety disorders are highly comorbid with a number of medical illnesses; (e) associations between cognitive decline and anxiety have been observed; (f) late age of onset is infrequent; and (g) both pharmacotherapy and CBT have demonstrated efficacy for older adults with anxiety. The implications of these findings are discussed and recommendations for the DSM-V are provided, including extending the text section on age-specific features of anxiety disorders in late life and providing information about the complexities of diagnosing anxiety disorders in older adults.

Pain catastrophizing in patients with noncardiac chest pain: relationships with pain, anxiety, and disability

OBJECTIVE

To examine the contributions of chest pain, anxiety, and pain catastrophizing to disability in 97 patients with noncardiac chest pain (NCCP) and to test whether chest pain and anxiety were related indirectly to greater disability via pain catastrophizing.

METHODS

Participants completed daily diaries measuring chest pain for 7 days before completing measures of pain catastrophizing, trait anxiety, and disability. Linear path model analyses examined the contributions of chest pain, trait anxiety, and catastrophizing to physical disability, psychosocial disability, and disability in work, home, and recreational activities.

RESULTS

Path models accounted for a significant amount of the variability in disability scales (R(2) = 0.35 to 0.52). Chest pain and anxiety accounted for 46% of the variance in pain catastrophizing. Both chest pain (beta = 0.18, Sobel test Z = 2.58, p < .01) and trait anxiety (beta = 0.14, Sobel test Z = 2.11, p < .05) demonstrated significant indirect relationships with physical disability via pain catastrophizing. Chest pain demonstrated a significant indirect relationship with psychosocial disability via pain catastrophizing (beta = 0.12, Sobel test Z = 1.96, p = .05). After controlling for the effects of chest pain and anxiety, pain catastrophizing was no longer related to disability in work, home, and recreational activities.

CONCLUSIONS

Chest pain and anxiety were directly related to greater disability and indirectly related to physical and psychosocial disability via pain catastrophizing. Efforts to improve functioning in patients with NCCP should consider addressing pain catastrophizing.

Increased risk of acute myocardial infarction for patients with panic disorder: a nationwide population-based study

OBJECTIVE

To examine prospectively the relationship between a diagnosis of panic disorder and the risk of acute myocardial infarction within 1 year of follow-up. Panic disorder is associated prospectively with coronary artery disease, but the risk of acute myocardial infarction associated with panic disorder has not been specifically investigated.

METHOD

This nationwide population-based study used data from the Taiwan National Health Insurance Research Database covering the years 2000 to 2005. A total of 9641 patients diagnosed with panic disorder in 2004 were included, together with 28,923 matched nonpanic disorder enrollees as a comparison cohort. Cox proportional hazard regressions were conducted to compute hazard ratios, after adjustment for comorbid medical disorders and sociodemographic characteristics.

RESULTS

Results indicated that 4.77% of patients with panic disorder (approximately one in 21) experienced an acute myocardial infarction episode within a year, compared with 2.73% of patients in the comparison cohort. The adjusted hazard of acute myocardial infarction was significantly higher (1.75 times, 95% Confidence Interval = 1.55-1.97) for patients with panic disorder, relative to the comparison cohort. The association persisted in further analyses stratified by hypertension, coronary heart diseases, and age.

CONCLUSION

Panic disorder was identified as an independent risk factor for subsequent acute myocardial infarction. Comprehensive multidisciplinary approaches are needed to optimize primary and secondary prevention of acute myocardial infarction among patients with panic disorder.

Prevalence and characteristics of multiple psychiatric disorders in cardiac rehabilitation patients

PURPOSE

Anxiety and depressive disorders have been established as independent risk factors for the development of and recovery from coronary heart disease (CHD). However, few studies have reported on the prevalence and personal characteristics of comorbid psychiatric disorders (PD) among cardiac populations. This project examined the prevalence of comorbid depressive and anxiety disorders among men and women with CHD commencing cardiac rehabilitation (CR) and the demographic, medical, and psychosocial characteristics among those meeting multiple PD criteria.

METHODS

Participants were 143 CHD patients (M age, 61 years; SD, 11.2; 70% men, 91% Caucasian, 64% married) entering CR who were evaluated via a semistructured, psychiatric interview to assess both current and lifetime prevalence rates of PD. Demographic, medical, and psychosocial variables were also assessed.

RESULTS

Approximately 45% met criteria for at least 1 anxiety disorder, and 20% met criteria for either major depressive disorder or dysthymic disorder either at the time of evaluation or in their lifetime. Across all participants, 26% met criteria for >or=2 PD. Of those with a depressive disorder, 76% also met criteria for at least 1 anxiety disorder. Participants with comorbid PD were of younger age and female and reported less education (P < .01). Comorbidity was also associated with self-reported overall diminished physical, emotional, and social quality of life, depression, and anxiety.

CONCLUSION

Comorbid PD are highly prevalent in the CR setting and are associated with specific demographic characteristics and reduced quality of life. These data offer additional support that routine screening for PD is warranted in outpatient cardiac settings.

Chest pain and its importance in patients with panic disorder: an updated literature review

CONTEXT

Chest pain is a common symptom in primary care settings, associated with considerable morbidity and health care utilization. Failure to recognize panic disorder as the source of chest pain leads to increased health care costs and inappropriate management.

OBJECTIVE

To identify characteristics of the chest pain associated with the presence of panic disorder, review the consequences and possible mechanisms of chest pain in panic disorder, and discuss the recognition of panic disorder in patients presenting with chest pain.

DATA SOURCES

Potential studies were identified via a computerized search of MEDLINE and PsycINFO databases and review of bibliographies. MeSH headings used included panic disorder with chest pain, panic disorder with coronary disease or cardiovascular disorders or heart disorders, and panic disorder with cholesterol or essential hypertension or tobacco smoking.

STUDY SELECTION

The diagnosis of panic disorder in eligible studies was based on DSM criteria, and studies must have used objective criteria for coronary artery disease and risk factors. Only case control and cohort studies were included.

DATA SYNTHESIS

Although numerous chest pain characteristics (believed to be both associated and not associated with coronary artery disease) have been reportedly linked to panic disorder, only nonanginal chest pain is consistently associated with panic disorder (relative risk = 2.03, 95% CI = 1.41 to 2.92).

CONCLUSION

Chest pain during panic attacks is associated with increased health care utilization, poor quality of life, and phobic avoidance. Because the chest pain during panic attacks may be due to ischemia, the presence of panic attacks may go unrecognized. Ultimately, the diagnosis of panic disorder must be based on DSM criteria. However, once panic disorder is recognized, clinicians must remain open to the possibility of co-occurring coronary artery disease.

Prevalence of anxiety disorders in men and women with established coronary heart disease

PURPOSE

Anxiety has been associated with the development and recurrence of coronary heart disease (CHD). The objective of this study was to estimate the prevalence of anxiety disorders in men and women with established CHD.

METHODS

One hundred fifty CHD patients were evaluated via a semistructured, psychiatric interview to assess both current and lifetime prevalence rates of anxiety disorders.

RESULTS

Approximately 36.0% (n = 54) of cardiac patients met the diagnostic criteria for at least 1 current anxiety disorder, and 45.3% (n = 68) presented with an anxiety disorder at some point in their lifetime. Social phobia and generalized anxiety disorder were the most prevalent anxiety disorders observed, with current prevalence rates of 21.3% and 18.7%, respectively, and a lifetime prevalence of 26%. In addition, the current prevalence rate of specific phobia was approximately 14.7%, whereas 15.3% met the lifetime criteria. Lower prevalence rates for panic disorder (current = 4.7%, lifetime = 5.3%), agoraphobia (current = 3.3%, lifetime = 4.7%), posttraumatic stress disorder (current = 0%, lifetime = 1.5%), and obsessive compulsive disorder (current = 0%, lifetime = 0.7%) were observed. Female cardiac patients evidenced significantly higher current (women = 58.3% vs. 25.5%, P < .001) and lifetime (women = 70.8% vs. men = 33.3%, P < .001) rates of anxiety disorders compared with their male counterparts.

CONCLUSIONS

A considerable number of CHD patients evidence a significant history of anxiety. Greater efforts to identify and treat anxiety in outpatient cardiology and cardiac rehabilitation settings are needed.

Panic disorder, cardiac diagnosis and emergency department utilization in an epidemiologic community sample

OBJECTIVE

We examined the association between panic disorder (PD), physician-diagnosed cardiac disease (CD), and the interaction of these variables in relation to health care utilization, as measured by emergency department (ED) visitations, in an epidemiologic sample.

METHODS

Subjects were identified from the National Epidemiologic Survey on Alcohol and Related Conditions, a nationally representative sample of 43,093 adult respondents from the United States who completed face-to-face computer-assisted structured clinical interviews.

RESULTS

Among patients with CD, the 12-month prevalence of PD (6.0%; 613/10,239) was significantly higher than that among non-CD subjects (3.4%; 1106/32,854; adjusted odds ratio=2.4; 95% confidence interval=2.2-2.7). CD patients with PD had a significantly greater prevalence of angina, tachycardia and alcohol use disorders as compared with PD-negative patients. PD-positive patients reported significantly greater mean 12-month ED visits (1.2) as compared with the PD-negative patients (0.6; P<.001). PD and tachycardia were found to have a significant interaction effect on ED visits for males (F=25.1; df=1,7; P<.001) but not for females (F=1.2; df=1,7; P=.28), with age, income, race and alcohol use included as covariates.

CONCLUSIONS

Epidemiological data support a relationship between PD and CD that impacts ED utilization. These findings have potential implications for medical, psychiatric and ED-based screening and interventions.

Panic attacks, daily life ischemia, and chest pain in postmenopausal women

BACKGROUND

Chest pain is a common symptom of panic attacks, but little is known about the relationship in older women among panic attacks, chest pain, and daily life ischemia.

METHODS

The authors conducted a cross-sectional survey of 3063 community-dwelling, generally healthy postmenopausal women enrolled between 1997 and 2000 in the Myocardial Ischemia and Migraine Study in 10 clinical centers of the 40-center Women's Health Initiative. Participants, ages 50 to 79 years, completed a questionnaire about occurrence of panic attacks in the previous 6 months and underwent 24-hour ambulatory electrocardiogram monitoring (AECG); 2705 women had valid AECG recordings and panic attack questionnaires. ST depression on AECG, heart rate variability (HRV), and chest pain episodes were compared among women with and without a 6-month history of panic attack.

RESULTS

There was no difference in overall prevalence of ischemic episodes during AECG between women with and without panic attacks. Women with a recent history of panic were more likely to experience chest pain during AECG after controlling for potential confounders (odds ratio [OR] = 2.01; 95% confidence interval [CI] = 1.40-2.88), including both nonischemic (OR = 1.83; 95% CI = 1.26-2.65) and ischemic chest pain (OR = 4.94; 95% CI = 1.41-17.30). Although mean HRV was lower in those with panic attacks (p = .017), this was not significant after controlling for confounders.

CONCLUSIONS

Postmenopausal women with a recent history of panic attacks do not appear to have more daily life ischemia as measured by occurrence of ST depression during 24-hour monitoring, but do have more chest pain and possibly lower HRV, suggesting that even sporadic panic attacks may be related to cardiovascular risk.

A study of lifetime prevalence of anxiety and depressive disorders in patients presenting with chest pain to emergency medicine

We studied the prevalence of anxiety and depressive disorders in patients with chest pain presenting to an emergency department. Majority of the patients had coronary artery disease (CAD). Twenty-three percent of patients with chest pain had a diagnosable psychiatric disorder according to ICD-10 research criteria. Anxiety and depressive disorders were equally distributed among patients with concomitant psychiatric syndrome. The level of psychological distress as measured on hospital anxiety and depression scale in patients of CAD with comorbid psychiatric syndrome was significantly more than patients with CAD alone and similar to non-CAD patients with psychiatric disorder. This finding is in agreement with an earlier study suggesting that the psychological distress seen in patients with CAD is related to the comorbid psychiatric condition and not to CAD.

Specific phobia of illness: search for a new subtype

Specific phobia of illness makes its appearance in DSM-IV as a new diagnostic subtype, separate from hypochondriasis. A review of the literature indicates that, while there is some support for this new category, studies have not as yet been done that could provide validation. Illness phobia appears to be a significant problem; it is prevalent in the general population and is associated with distress and impairment, including interference with medical care. It appears to be associated with older age, physical illness, and female gender. Group comparisons are needed showing that persons with this phobia can be distinguished from hypochondriasis on the basis of these and other demographic and illness features. We outline a research agenda for demonstrating this separation.

Psychological treatments for noncardiac chest pain: recommendations for a new approach

OBJECTIVE

Our objective is to describe the current state of treatment for NCCP, identify barriers to treatment and limitations of current approaches, and to recommend treatment strategies, which may address these challenges.

METHODS

We describe the underlying rationale for treating NCCP and review the current literature concerning NCCP treatments and other brief approaches to outpatient treatment for psychosomatic illness.

RESULTS

Most treatments for NCCP have been based on the Attribution Model. Although effective, these treatments are appropriate and acceptable to only a small minority of NCCP patients. The Biopsychosocial Model has been used to treat psychosomatic conditions in outpatient groups and may overcome or avoid many of the limitations inherent in current treatment strategies for NCCP.

CONCLUSIONS

We recommend an intervention for NCCP that is brief, would be delivered in the emergency department setting (to take advantage of the Teachable Moment), and which is based on the Biopsychosocial Model.

Panic in the emergency room

OBJECTIVE

This paper examines the relation between coronary artery disease (CAD) and panic disorder (PD), discusses the implications of this relation to the general medical system, and suggests future assessment and intervention strategies for emergency departments.

METHOD

We reviewed the literature on CAD and PD using Medline and PsycINFO.

RESULTS

PD is more expensive to our nonpsychiatric, general medical system than any other psychiatric condition. The main reason for PD patients' continued use of general medicine for their psychological symptoms is that their PD remains undiagnosed. In the emergency room (ER), PD patients with chest pain have their PD go undiagnosed about 98% of the time. By having ERs implement specific assessment and intervention strategies for patients presenting with chest pain, the savings to the general medical system could be substantial.

CONCLUSIONS

By improving recognition of PD in the ER, there is the potential to generate large savings in general medical care. With the availability of empirically supported or effective psychological and pharmacologic treatments for PD, appropriately diagnosing and subsequently treating patients with PD may prevent them from experiencing many years of disability and higher rates of fatal coronary events.

Classic conditioning and dysfunctional cognitions in patients with panic disorder and agoraphobia treated with an implantable cardioverter/defibrillator

OBJECTIVE

A model for the development of anxiety disorders (panic disorder with or without agoraphobia) is needed. Patients with an implantable cardioverter/defibrillator (ICD) are exposed to repeated electric shocks. If the theory of anxiety development by aversive classic conditioning processes is valid, these repeated shocks should lead to an increased risk of anxiety disorders. To study this hypothesis, we retrospectively studied 72 patients after implantation of an automatic ICD.

METHODS

Patients were assessed with the semistructured Diagnostic Interview of Psychiatric Disease 1 to 6 years after implantation of an automatic ICD. Panic disorder and/or agoraphobia was diagnosed in patients who fulfilled all DSM-III-R criteria for those conditions.

RESULTS

Anxiety disorder developed in 15.9% of patients after ICD implantation. This was significantly related to the frequency of repeated defibrillation (shocks) to stop malignant ventricular arrhythmias. Dysfunctional cognitions are an additional vulnerability factor.

CONCLUSIONS

The data support both the conditioning hypothesis and the cognitive model of anxiety development. These findings suggest that ICD patients are an appropriate risk population for a prospective study of the development of anxiety disorders.

Panic disorder and idiopathic cardiomyopathy

OBJECTIVE

This study investigated whether, among a population of cardiac patients, there is a preferential association between idiopathic cardiomyopathy (CMP) and Panic Disorder (PD).

METHODS

A total of 93 patients with cardiac failure, 50 of them with CMP, 43 with other cardiac diseases, underwent a standard psychiatric examination using the MINI neuropsychiatric interview.

RESULTS

While half of the subjects met the criteria for a psychiatric disorder, PD was no more prevalent in the CMP group compared to other patients.

CONCLUSION

This study confirms the high prevalence of psychiatric pathology, particularly anxiety, mood, and alcohol-related disorders, in patients with cardiac failure. However, previous findings on the specific association between CMP and PD could not be replicated.

Recognition and acute management of patients with panic attacks in the emergency department

Patients with panic attacks commonly present to emergency departments. If the disorder is identified early, intervention can be begun, even during the evaluation phase. Effective therapies significantly improve these patients' health and quality of life.

Is panic disorder associated with coronary artery disease? A critical review of the literature

OBJECTIVE

To critically review existing literature examining the relationship between panic disorder (PD) and coronary artery disease (CAD). We specifically sought answers to the following questions: (1) What is the prevalence of PD in CAD patients? (2) What is the directionality of the relationship between PD and CAD? (3) What mechanisms may mediate the link between PD and CAD?

METHODS

Medline and Psychlit searches were conducted using the following search titles: "panic disorder and coronary artery disease", "panic disorder and coronary heart disease", and "panic disorder and cardiovascular disease" for the years 1980-1998. The above search was also repeated replacing "panic disorder" with "panic attacks" for the same period.

RESULTS

The prevalence of PD in both cardiology out-patients and patients with documented CAD ranges from 10% to 50%. The association between PD and CAD appeared strongest in patients with atypical chest pain or symptoms that could not be fully explained by coronary status. There is some evidence linking phobic anxiety but not PD per se to CAD risk, but little evidence linking CAD to PD risk. Studies of the mechanisms linking PD to CAD are still in their infancy, but there is preliminary evidence linking PD to reduced heart rate variability (HRV) and myocardial ischemia, two pathophysiological mechanisms related to CAD.

CONCLUSION

PD is prevalent in CAD patients, but it is unclear the extent to which PD confers risk for and/or exacerbates CAD. Prospective research is needed to more firmly establish PD as a distinct risk factor for the development and progression of CAD. However, because many of the symptoms of PD mimic those of CAD, differentiating these disorders and learning how they may influence each other is imperative for clinical practice.

Panic disorder patients and their medical care

The goal of the study was to examine the functional status and medical care of general medical outpatients with panic disorder. One hundred patients completed self-report questionnaires and a diagnostic interview for panic disorder. They were compared with a random sample of patients without panic disorder. Medical morbidity was assessed from the medical record, and the patients' clinic physicians completed a questionnaire about them. The prevalence of current (1 month) panic disorder was 6.7%-8.3%. The panic disorder patients had fewer serious medical diagnoses, but more medical utilization and more role impairment than the comparison group. The clinic physicians rated the panic patients as more anxious, more depressed, more hypochondriacal, and more difficult to care for. Sixty-one percent of the panic disorder patients recalled receiving an anxiety disorder diagnosis. These findings add to a growing body of evidence that panic disorder imposes a significant burden on those with this illness and that it is a seriously underdiagnosed condition in primary care practice.

Panic disorder in the general medical setting

There is a high prevalence of panic disorder in medical patients, as well as an association between panic disorder and high rates of utilization of medical services and excessive medical costs incurred from extensive medical workups. The association between panic disorder and specific cardiac, gastrointestinal, respiratory, and neurologic symptoms and disorders are described, and psychophysiological models attempting to account for the medical comorbidity associated with panic disorder are addressed. Finally, clinical trials investigating pharmacological and psychological interventions to treat the somatic symptoms with which patients with panic disorder often present are reviewed and critiqued, and productive avenues for further research on panic disorder in medical patients are recommended.

Prevalence of panic disorder in cardiac outpatients

OBJECTIVE

To evaluate outpatients from Toronto-area cardiology clinics for panic disorder (PD) and investigate differences between patients with and without PD.

METHOD

Participants were diagnosed using both standard DSM-IV criteria and an altered formulation that identified a more fearful panic group.

RESULTS

There was a prevalence of panic disorder (12.5%) in cardiac outpatients in keeping with previous studies. Patients with PD did not differ significantly from other patients with regard to the presence of significant heart disease. The higher prevalence of palpitations found in patients who met criteria for PD compared with those who did not reflects previous findings. PD cases did not differ significantly in family history from respondents without the disorder, but the more fearful group did (P < 0.05).

CONCLUSION

PD often presents with cardiac symptoms, especially palpitations, and is often comorbid with heart disease.

Psychiatry in medical practice. Implications for the education of primary care physicians in the era of managed care: Part 2

In Part 1 of this 2-part series, the epidemiology of psychiatric disorders in primary care settings was reviewed as well as evidence that indicates that these conditions often go underrecognized and undertreated by primary care physicians. Educational studies to improve the psychiatric skills of primary care physicians were also reviewed. In Part 2 of this series, a core curriculum for primary care physicians in the diagnosis and treatment of psychiatric disorders that emphasizes competency-based learning is presented. Recommendations for the development and implementation of these competency-based training modules are offered in the conclusion.

Psychiatry in medical practice. Implications for the education of primary care physicians in the era of managed care: Part 1

In an effort to control the costs of mental health care, many medical care systems have emphasized the management of psychiatric illness by primary care physicians and curtailed specialty mental health referrals. While this trend mandates that primary care physicians have expertise in the diagnosis and treatment of psychiatric disorders, evidence indicates that not only are psychiatric disorders underrecognized in primary care settings, but also that treatment is often inadequate and accompanied by less than optimal outcomes. In Part 1 of this 2-part series, representative studies of the epidemiology of psychiatric disorders in primary care are reviewed in addition to data that has documented low rates of recognition and suboptimal management of psychiatric illness. In Part 2, to be published in the January-February 1997 issue of Psychosomatics, a core psychiatric curriculum for primary care physicians will be presented that emphasizes the use of competency-based training modules. Strategies for the development and implementation of these educational training modules will also be discussed.

The future of consultation-liaison psychiatry and medical-psychiatric units in the era of managed care

There has been increasing recognition and documentation of the impact of psychiatric problems on the outcome and cost of medical care. Because consultation-liaison psychiatrists have the expertise to address the psychiatric aspects of medical illness, this group should be in a strong position to facilitate integration of medical and psychiatric services in managed care delivery systems. Although consultation-liaison psychiatry (CLP) has documented its ability to shorten inpatient medical lengths of stay for some disorders, a greater challenge exists in developing comprehensive systems to identify and care for patients with mental health problems in primary care settings. This paper reviews the fiscal and programmatic implications for managed medical care systems of findings from outcome-based C-L research. The future role of CLP and combined medical-psychiatric units in an era of managed care is also discussed.

Diagnostic dilemmas presented by patients with anxiety and depression

Although anxiety and depression are among the most common symptoms of persons seen in medical practice, a number of dilemmas still exist in the identification and management of these disorders. The objectives of this paper are to review the prevalence and identification of anxiety, depression, and mixed anxiety-depression in medical practice; to review issues involving the medical evaluation of these disorders; to clarify the relevance of psychosocial issues to choice of treatment; and to review issues involving medication treatment choices.

The relationship between mental health and drug use

The aim was to examine the relationship between mental health and use of different kinds of drugs. The study was a cross-sectional survey of a total population aged 45-69 years, conducted in 2 municipalities in southwestern Finland. Altogether 1821 people (80% of those invited), 815 men and 1006 women, took part in the screening. The subjects were examined by a questionnaire mailed beforehand and checked in a personal interview. The questionnaire contained questions about the currently used drugs and Goldberg's questionnaire on mental health. Half of the people examined used prescribed drugs currently, more women used drugs than men, and the use of drugs increased with age. Mental symptoms measured with the Goldberg Index appeared in one fifth of the subjects, showing a slight increase with age. Men with mental symptoms showed a fourfold psychotropic drug use compared with the men without mental symptoms. The women with mental symptoms showed a threefold use of psychotropic drugs compared with the women without mental symptoms. Similar differences were found also in other drug groups, for example cardiac glycosides, other cardiovascular drugs, analgesics and drugs for respiratory and digestive organs. Persons with mental disorders showed a high tendency to drug use, also when those drugs had no direct attachment to the mental problem. Men seemed more liable to somatization of mental problems than women.

Panic disorder and chest pain in the coronary care unit

Consecutive admissions to a university hospital coronary intensive care unit were prospectively evaluated using a modified version of the Structured Clinical Interview for DSM-III-R by interviewers blind to the patient's cardiac status. Panic disorder was present in almost one-third of the patients. Four (21%) of the 19 patients with panic disorder also had positive cardiac findings, including 2 who had myocardial infarctions. Of the 27 patients with negative cardiac findings, 15 (55.5%) had panic disorder. Whereas panic disorder and coronary heart disease may coexist in patients with acute chest pain, there appears to be a very high prevalence of panic disorder among patients in whom cardiac disease has been excluded.