Jerald Kay

Effect of age on long-term heart rate variability

OBJECTIVE Previous studies on short-term time series of heart rage suggest an inverse relationship between age and spectral powers of heart rate variability in various frequency bands. In this study, we examined the relationship between age (6-61 years) and long-term heart rate variability. METHODS We obtained 24-h Holter ECG in 33 healthy human subjects (11 children and 22 adults). The heart rate data were analyzed by using spectral analysis and fractal dimensions of the time series. RESULTS We found a significant negative correlation between age and very low frequency (VLF, 0.0033-0.04 Hz), low frequency (LF, 0.04-0.15 Hz) and high frequency (HF, 0.15-0.5 Hz) powers and fractal dimensions during awake as well as sleep periods, and a positive correlation between age and LF/HF ratios. Age and ultra-low frequency (ULF, < 0.0033 Hz) were modestly and negatively correlated only during the awake period. CONCLUSIONS Sleep ULF power is not significantly affected by age, whereas VLF, LF and HF powers and fractal dimensions of heart rate significantly decrease with age during awake as well as sleep periods.

Decreased heart-period variability in patients with panic disorder: a study of Holter ECG records

This study investigated cardiac autonomic function in patients with panic disorder and normal controls using Holter ECG records. A decrease in ultra-low frequency power (< 0.0033 Hz) is known to be associated with an increased risk for cardiovascular mortality in humans. Twenty-four-hour ECG was recorded in 29 patients with panic disorder and 23 normal controls using Holter records. Data for 20 h and also 20000 s of awake and 20000 s of sleep periods were analyzed using spectral analysis to quantify absolute and relative heart-period variability in ultra low (ULF: < 0.0033 Hz), very low (VLF: 0.0033-0.04 Hz), low (LF: 0.04-0.15 Hz) and high (HF: 0.15-0.5 Hz) frequency bands. The patients with panic disorder had significantly lower total and absolute ULF power, which was more pronounced during sleep. The patients also had significantly lower relative ULF power and significantly higher relative LF power during sleep. There was a significant increase of relative LF power from awake to sleep period only in the patient group. The decrease in total and ULF power may increase the risk of mortality and sudden arrhythmic death in patients with panic disorder if they experience a cardiac event. The higher relative LF power during sleep also suggests a possible higher sympathetic drive in the patients during sleep.

Effect of Posture and Isoproterenol on Beat-to-Beat Heart Rate and QT Variability

Rationale: Recent literature emphasizes the utility of QT variability to study ventricular electrophysiologic function. In this investigation, we sought to test the hypothesis that beat-to-beat fluctuations in QT intervals are mediated by sympathetic activity in normal subjects using postural challenge and isoproterenol infusions. Subjects and Methods: We obtained ECG in the supine and standing postures during spontaneous breathing, at 12, 15 and 20 per minute controlled breathing (n = 19), and before and after infusions of isoproterenol, a β-adrenergic agent, in the supine posture during spontaneous breathing (n = 11) using lead II configuration in healthy human adult subjects. Heart rate (HR) and QT time series data were analyzed by spectral analysis of 256 s of real-time data. Beat-to-beat QT intervals were measured by automated analysis of ECG. A QT variability index (QTvi) was calculated for each subject as the logarithm of the ratio of normalized QT variance to normalized HR variance. We also calculated fractal dimensions of QT time series during spontaneous breathing. Results: QTvi was significantly higher in the standing than in the supine posture (–1.93 ± 0.27 vs. –1.47 ± 0.41; p = 0.0001), and also during isoproterenol infusions in the supine posture (–1.83 ± 0.39 vs. –1.27 ± 0.43; p = 0.0001). Fractal dimensions of QT time series were also significantly higher during standing (p = 0.00001) and isoproterenol infusions (p = 0.0002). Respiratory rate or tidal volume did not account for the increased QT variability seen in the standing posture. Conclusions: A change from the supine to the standing posture as well as infusion of isoproterenol significantly increased the absolute as well as normalized QT variability, which appears to be due to an increase in sympathetic activity associated with these conditions.

The WPA-Lancet Psychiatry Commission on the Future of Psychiatry

Background This Commission addresses several priority areas for psychiatry over the next decade, and into the 21st century. These represent challenges and opportunities for the profession to sustain and develop itself to secure the best possible future for the millions of people worldwide who will face life with mental illness. Part 1: The patient and treatment Who will psychiatrists help? The patient population of the future will reflect general demographic shifts towards older, more urban, and migrant populations. While technical advances such as the development of biomarkers will potentially alter diagnosis and treatment, and digital technology will facilitate assessment of remote populations, the human elements of practice such as cultural sensitivity and the ability to form a strong therapeutic alliance with the patient will remain central. Part 2: Psychiatry and health-care systems Delivering mental health services to those who need them will require reform of the traditional structure of services. Few existing models have evidence of clinical effectiveness and acceptability to service users. Services of the future should consider stepped care, increased use of multidisciplinary teamwork, more of a public health approach, and the integration of mental and physical health care. These services will need to fit into the cultural and economic framework of a diverse range of settings in high-income, low-income, and middle-income countries. Part 3: Psychiatry and society Increased emphasis on social interventions and engagement with societal expectations might be an important area for psychiatrys development. This could encompass advocacy for the rights of individuals living with mental illnesses, political involvement concerning the social risk factors for mental illness, and, on a smaller scale, work with families and local social networks and communities. Psychiatrists should therefore possess communication skills and knowledge of the social sciences as well as the basic biological sciences. Part 4: The future of mental health law Mental health law worldwide tends to be based on concerns about risk rather than the protection of the rights of individuals experiencing mental illness. The United Nations Convention on the Rights of Persons with Disabilities, which states that compulsion based in whole or in part on mental disability is discriminatory, is a landmark document that should inform the future formulation and reform of mental health laws. An evidence-based approach needs to be taken: mental health legislation should mandate mental health training for all health professionals; ensure access to good-quality care; and cover wider societal issues, particularly access to housing, resources, and employment. All governments should include a mental health impact assessment when drafting relevant legislation. Part 5: Digital psychiatry—enhancing the future of mental health Digital technology might offer psychiatry the potential for radical change in terms of service delivery and the development of new treatments. However, it also carries the risk of commercialised, unproven treatments entering the medical marketplace with detrimental effect. Novel research methods, transparency standards, clinical evidence, and care delivery models must be created in collaboration with a wide range of stakeholders. Psychiatrists need to remain up to date and educated in the evolving digital world. Part 6: Training the psychiatrist of the future Rapid scientific advance and evolving models of health-care delivery have broad implications for future psychiatry training. The psychiatrist of the future must not only be armed with the latest medical knowledge and clinical skills but also be prepared to adapt to a changing landscape. Training programmes in an age in which knowledge of facts is less important than how new knowledge is accessed and deployed must refocus from the simple delivery of information towards acquisition of skills in lifelong learning and quality improvement. Conclusion Psychiatry faces major challenges. The therapeutic relationship remains paramount, and psychiatrists will need to acquire the necessary communication skills and cultural awareness to work optimally as patient demographics change. Psychiatrists must work with key stakeholders, including policy makers and patients, to help to plan and deliver the best services possible. The contract between psychiatry and society needs to be reviewed and renegotiated on a regular basis. Mental health law should be reformed on the basis of evidence and the rights of the individual. Psychiatry should embrace the possibilities offered by digital technology, and take an active role in ensuring research and care delivery in this area is ethically sound and evidence based. Psychiatry training must reflect these multiple pressures and demands by focusing on lifelong learning rather than simply knowledge delivery.

Effects of paroxetine on heart period variability in patients with panic disorder: a study of holter ECG records.

We investigated cardiac autonomic function in 16 patients with panic disorder before and after treatment with paroxetine using Holter ECG records. Our previous data suggest a relative increase in sympathetic activity in patients with panic disorder, especially during sleep. Data for 20 h and awake and sleep periods were analyzed using spectral analysis to quantify absolute and relative heart period variability in ultra low (ULF: <0.0033 Hz), very low (VLF: 0.0033–0.04 Hz), low (LF: 0.04–0.15 Hz) and high (HF: 0.15–0.5 Hz) frequency bands. We also obtained fractal dimensions (FD) for the 20-hour, awake and sleep time series of RR intervals. Paroxetine treatment (19.7 ± 4.7 mg/day for 105 ± 37 days) resulted in a significant improvement in the frequency and intensity of panic attacks and also on the state anxiety inventory. Paroxetine treatment produced a significant decrease of 20-hour absolute HF power, awake absolute LF power and sleep absolute HF power. There was also a significant decrease of FDs after treatment with paroxetine for the sleep period. The decrease in LF and HF powers, and sleep FD is likely due to the antimuscarinic effect of paroxetine. The decrease in day-time LF power may also be due to a decrease in relative cardiac sympathetic activity after paroxetine treatment.

Emotional distress, coping, and adjustment in human immunodeficiency virus infection and acquired immune deficiency syndrome

Fifty-seven ambulatory, human immunodeficiency virus (HIV)-infected patients at various stages of disease progression and 17 HIV seronegative controls were examined in a crosssectional study with self-administered measures of emotional distress, coping, and adjustment to illness. All infected and control subjects were homosexual or bisexual and free of acute medical illness. The findings indicated that both uninfedcted and infected subjects had enhanced emotional distress in a variety of domains. However, while somatic and cognitiveruminative complaints were greater in symptomatic subjects relative to controls, depression and anxiety were not. Professed coping strategies were heterogeneous and not particularly related to HIV diagnostic status, with the exception of planful problem solving which was decreased for acquired immune deficiency syndrome subjects. Disruption in several aspects of daily life adjustment was markedly increased in symptomatic subjects. The findings suggest that both HIV seropositive status and perceived risk for infection produce a sustained level of generalized psychological distress. Even in the absence of current medical illness, patients with advanced disease progression are concerned primarily with anticipated medical implications and cognitive effectiveness.

Use of Tricyclic Antidepressants in Recipients of Heart Transplants

Cardiac transplantation has become an accepted treatment for certain endstage cardiac disease patients. Depression and significant psychosocial stress among heart transplant recipients are not uncommon, but published reports about the use of antidepressants in these persons are very rare. The authors of this study report on a group of nine heart transplant recipients treated with antidepressant medicines. Seven patients achieved clinical remissions of their depression, and only two were unable to tolerate the noncardiac side effects of the medication. Indicators of autonomic, electrocardiographic, and hemodynamic functions showed no adverse effects. Although the study is based on a small sample, it appears that tricyclic antidepressants are safe and effective in heart transplant recipients.

Quantifying the Accuracy of Forensic Examiners in the Absence of a “Gold Standard”

This study asked whether latent class modeling methods and multiple ratings of the same cases might permit quantification of the accuracy of forensic assessments. Five evaluators examined 156 redacted court reports concerning criminal defendants who had undergone hospitalization for evaluation or restoration of their adjudicative competence. Evaluators rated each defendant’s Dusky-defined competence to stand trial on a five-point scale as well as each defendant’s understanding of, appreciation of, and reasoning about criminal proceedings. Having multiple ratings per defendant made it possible to estimate accuracy parameters using maximum likelihood and Bayesian approaches, despite the absence of any “gold standard” for the defendants’ true competence status. Evaluators appeared to be very accurate, though this finding should be viewed with caution.

Assessing Psychotherapy Competence in Psychiatric Residents: Getting Real

As delineated in a recent article by Eugene Beresin and Lisa Mellman,1 and for the purpose of increasing accountability in medicine, the Accreditation Council on Graduate Medical Education and its various Residency Review Committees (RRCs) have recently assumed the challenge of ensuring that all residents achieve competence in six core areas: patient care, medical knowledge, interpersonal and communication skills, practice-based learning and improvement, professionalism, and systems-based practice.2 In the interest of ensuring the ongoing relevance and quality of psychotherapy training in psychiatric residency programs, the RRC for Psychiatry has further mandated that training programs “must demonstrate that residents have achieved competency” in at least five forms of psychotherapy, including brief therapy, cognitive-behavioral therapy, combined psychotherapy and psychopharmacology, psychodynamic therapy, and supportive therapy.3 It is worth taking note of the reasons why the RRC took these notable and somewhat controversial actions. For several decades influential psychotherapy-minded psychiatrists in the American Psychiatric Association and the American Association of Directors of Psychiatric Residency Training have been concerned that the amount of time, attention, and resources allocated to psychotherapy training in general psychiatric residency programs has steadily and significantly declined, and that pressures related both to managed-care reimbursement patterns and to the increasing influence of biological psychiatry have been gutting psychotherapy training in many residency programs. They feared that without stricter requirements, psychotherapy training in U.S. training programs risked deteriorating even further, and that the quality of psychotherapy performed

Medical student abuse: perceptions and experience

Summary. A questionnaire containing 18 vignettes of common clinical educational situations with potentially abusive treatment of medical students and a 10‐item attitude assessment about abusive behaviour were administered to the first‐and fourth‐year medical students at a mid‐west US university medical school. The first‐ and fourth‐year groups did not differ significantly on perceived abusiveness of most of the vignettes, although several of the individual vignettes were perceived significantly differently by the two groups. As hypothesized, the fourth‐year students had experienced such situations more frequently. Attitudes towards abusive behaviour did not differ between the two groups. The authors contrast teaching interactions perceived as educationally useful and not abusive with those seen as abusive and not useful and offer explanations for the differences observed. Finally, the possible implications of the results for medical education are discussed.