Positive and adverse childhood experiences and mental health outcomes of children

OBJECTIVE

Researchers and policymakers have identified adverse childhood experiences (ACEs) like abuse, neglect, and household dysfunction as a contributing factor to poor mental health outcomes for children. Positive childhood experiences (PCEs) like open family communication styles, having the ability to live and play in a safe, stable, and protective environment, having constructive opportunities for social engagement, and receiving mentorship from adults have been found to improve the mental health of children.

PURPOSE

This paper explores the role of ACEs and PCEs on the mental health outcomes of children.

METHOD

A sample of 22,628 children ages 6-17 from the National Survey of Children's Health (2017-2020) was used to explore the relationship between PCEs and ACEs and the mental health of children. Logistic regression analysis is used to model the effect of PCEs and ACEs on the odds of child mental health diagnoses.

RESULTS

Findings indicate that with each additional ACE, there was a significant increase in the odds of reporting a MH condition (OR = 1.25, 95 % CI 1.09-1.43). Conversely, with each additional PCE, there is a significant decrease in the odds or reporting a MH condition (OR = 0.76, 95 % CI 0.68-0.84). There was also evidence that PCEs moderate the relationship between ACEs and reports of mental health conditions. When counts of ACEs are low, PCEs provide a protective effect on reports of mental health. But when the count of ACEs are high, children with higher numbers of PCEs have similar reports of mental health conditions.

SUMMARY

This study provides information about the moderating effect of PCEs on the relationship between ACEs and child mental health diagnosis with the goal of informing policies and interventions focused on ameliorating the growing crisis of children's negative mental health and well-being. WHAT IS KNOWN?: Adverse childhood events (ACEs) like abuse, neglect and household dysfunction are known to negatively impact the mental health and well-being of children. Positive childhood experiences (PCEs), on the other hand, can positively influence the mental health and well-being of children. WHAT DOES THIS ARTICLE ADD?: This study examines the association between adverse and positive childhood experiences to understand how they impact the mental health outcomes of children ages 6-17. Findings indicate that when ACEs are lower, the impact of PCEs are positive, but when ACEs are higher, PCEs do not make much difference in reports of mental health problems.

Sex, Age, Race/Ethnicity, Veteran Status, and the Likelihood of Reporting Cardiovascular Conditions in the National Health Interview Survey

BACKGROUND

This study explores the likelihood of reporting the presence of cardiovascular health conditions in the National Health Interview Survey, with a focus on the moderating effects of veteran status, race/ethnicity, age, sex, and functional status.

METHOD

Data from the 2012-2015 National Health Interview Survey examine 5 cardiovascular health conditions/risk factors (hypertension, coronary heart disease, heart conditions, stroke, and heart attack).

RESULTS

Age, sex, and functional status moderate the relationship between veteran status and cardiovascular conditions. Veterans who are younger (veteran × age) have a higher risk of reporting 1 cardiovascular condition compared with veterans who are older (relative risk [RR], 0.99; 95% confidence interval [CI], 0.99-0.99). Veterans with functional limitations (veteran × functional status) are at a lower risk of reporting 3 or more cardiovascular conditions compared with veterans with no functional limitations (RR, 0.73; 95% CI, 0.56-0.95). Interaction variables in the model (veteran × sex) show that female veterans had a higher risk than did female non-veterans of reporting 3 or more cardiovascular conditions compared with male veterans versus male non-veterans (RR, 0.71; 95% CI, 0.53-0.95). Race/ethnicity does not moderate the likelihood of reporting cardiovascular disease conditions in this sample.

CONCLUSION

This study demonstrates that previous military service is linked to the reporting of cardiovascular disease conditions by using nationally representative data to examine the moderating effects of veteran status on the relationship between race/ethnicity, sex, functional status, and age and cardiovascular disease for veterans living in the general US population. The findings suggest a waning healthy soldier effect for the youngest American veterans and indicate that female veterans' cardiovascular health is at greatest risk.

Cardiovascular disease among United States military veterans: Evidence of a waning healthy soldier effect using the National Health Interview Survey

Objectives

Cardiovascular disease is the most common chronic health condition affecting Americans. One important group of Americans that health researchers have noted as key to understanding general population health and wellbeing are veterans of the US military. The healthy soldier effect has been used to explain the health benefits of military service during and for a period of time after service. The purpose of this study is to examine the prevalence of cardiovascular disease in a national sample of veterans and non-veterans with specific attention paid to reported cardiovascular disease across ages.

Methods

A total of 150,067 veteran and non-veteran respondents from the National Health Interview Survey were examined for the likelihood of reporting the type and number of cardiovascular conditions.

Results

Veterans report higher rates of certain cardiovascular disease conditions and report a higher number of cardiovascular disease conditions compared to non-veterans. Veterans also reported higher numbers of cardiovascular disease conditions at younger ages (ages 25–65) compared to non-veteran counterparts. At older ages (ages 66 to 85+), non-veterans reported higher numbers of cardiovascular disease conditions compared to veterans.

Discussion

Our findings are consistent with research that indicates a waning healthy soldier effect for young veterans.

Barriers to college success among students that experienced adverse childhood events

Objective: This study examines the relationship between adverse childhood experiences (ACEs) and academic barriers to college success. Participants: College students (n = 525) were surveyed about exposure to ACEs and academic barriers on a large university campus in the Southeast. Methods: Multivariate regression was used to model the academic barriers among college students for students with different levels of ACEs exposure controlling for depression, health and family barriers, and sociodemographic characteristics. Results: Students with ACEs reported more family difficulties and health problems compared with those without ACEs. Depressive symptomology, poorer health ratings, and other health and family issues significantly predicted higher counts of academic barriers. Conclusions: Students with ACEs face greater difficulty with relation to health and family barriers which in turn impacts academic barriers.

Shared Decision Making and Treatment for Minority Children With ADHD

Shared decision making (SDM) involves the patient and family in medical decisions regarding treatment. The purpose of this article is to utilize the 2016 National Survey of Children’s Health to explore whether family engagement in SDM increases the odds of treatment for children with ADHD, and more specifically, if the presence of SDM is associated with the reduction of racial and ethnic disparities in treatment. Multivariate logistic regression was used to model the odds of treatment for each racial/ethnic group controlling for sociodemographic and health-related variables. Results indicated that White and Multiracial families engaged in SDM were twice as likely to report treatment for ADHD. Black and Latinx families, however, showed no difference in treatment for ADHD when SDM was present. Based on these findings, we conclude that SDM may be less important for Black and Latinx families when making treatment decisions for children with ADHD.

Activity-Limiting Musculoskeletal Conditions in US Veterans Compared to Non-Veterans: Results from the 2013 National Health Interview Survey

Past military service is associated with health outcomes, both positive and negative. In this study we use the 2013 National Health Interview Survey to examine the constellation of conditions referred to as musculoskeletal disorders (MSDs) for Veterans and non-veterans with health conditions that limit their daily activities. Multivariate logistic regression analysis reveal that Veterans are more likely to report MSDs like neck and back problems, fracture bone and joint problems as an activity limiting problem compared to non-veterans. The relationship between age and reports of activity limiting MSDs is moderated by Veteran status. Veterans in this sample report more activity limiting MSDs at younger ages compared to non-veterans and fewer MSDs at older ages. This research contributes to our understanding of potentially limiting health conditions at earlier ages for Veterans.

Profound Sensorineural Deafness: A Histopathologic Study

For this study 22 temporal bones from patients with profound sensorineural deafness of various causes were selected. Graphic reconstruction of each cochlea and acoustic ganglion was performed, together with a quantitative evaluation of three types of sensorineural elements: hair cells, peripheral auditory fibers, and ganglion cells. The numbers of acoustic ganglion cells were compared with those in 16 normal temporal bones. The temporal bones were divided into five groups, based on the relative degree of degeneration found in each of the three types of elements studied. Severe to complete hair cell loss was noted in all five groups; degeneration of peripheral nerve fibers ranged from moderate to complete in all but one group; and ganglion cell counts varied widely within all groups. In a qualitative comparison no relationship was found between the clinical data and the histopathologic correlates. The results of the study suggest that neither the clinical data nor the histopathologic findings provide any criteria for selecting patients for cochlear implants.

Cerebral Hemodynamics Patterns by Transcranial Doppler in Patients With Acute Liver Failure

INTRODUCTION

About half of patients with acute liver failure (ALF) show clinical signs of cerebral edema and intracranial hypertension. Neuroimaging diagnostics and electroencephalography have poor correlation with intracranial pressure measurement.

OBJECTIVE

The objective of this study was to characterize the cerebral hemodynamics patterns with transcranial Doppler (TCD) sonography in patients with ALF.

METHOD

We studied 21 patients diagnosed with ALF, admitted to the intensive care unit (ICU) at the Centro de Investigaciones Médico Quirúrgicas of Cuba. All of these patients had a TCD performed on arrival at ICU, evaluating the following: systolic (SV), diastolic (DV), and medium (MV) flows velocities and pulsatility index (PI) in right middle cerebral artery (RMCA) via temporal windows.

RESULTS

The sonographic patterns of cerebral hemodynamics were as follows: low-flow, 12 patients (57.1%); high resistance, 5 patients (23.8%); and hyperemic, 4 patients (19%). Patients who died while waiting had lower MV RMCA (56.1 vs 58.1 cm/s) and higher PI (1.71 vs 1.41) than patients who could undergo transplantation (P = .800 and P = .787, respectively).

CONCLUSIONS

In patients diagnosed with ALF admitted to the ICU the predominating cerebral hemodynamic pattern was low-flow with resistance increase. The TCD was shown to be a useful tool in the initial evaluation for prognosis and treatment.

Individualized Education Program Development Among Racially/Ethnically Diverse Children and Adolescents with Health Conditions

Background Black, Hispanic, and low income children bear a greater burden of chronic health conditions compared to wealthier white counterparts. Under federal law, schools provide services to children when their health conditions impair learning. These school services, called individualized education programs (IEPs) can reduce disparities in school outcomes. This paper examines the extent to which children with health conditions have an IEP plan, an important first step in understanding service utilization. Method Andersen's Behavioral Model was used to examine IEP plan presence by using the 2012 National Survey of Children's Health. School aged children (6-17), with at least one health condition (N = 16,496) were examined using multivariable logistic regression analysis to understand predisposing (age, sex, race/ethnicity), enabling (family and neighborhood), and need (health related) factors as predictors of having an IEP plan. Race/ethnicity interaction terms tested for moderating effects of race/ethnicity on the relationship between predisposing, enabling and need factors and having an IEP plan. Results Hispanic children were 93.4 % (OR = .066) less likely and Black children were 87.9 % (OR = .121) less likely to have an IEP plan compared to White children. Black, Hispanic, and Multiracial children were more likely to have an IEP plan if they had more family and neighborhood resources (OR range 1.37-1.62) and greater health needs and health care needs (OR range 1.29-2.57). Conclusion The Behavioral Model was useful in predicting the presence of IEP plans among racially/ethnically diverse children with health conditions as an important step in understanding disparities in healthcare access in schools.

Transition Experiences of Stroke Survivors Following Discharge Home

BACKGROUND

Little is known about the transition experiences of stroke survivors after discharge home.

PURPOSE

The purpose of this article is to describe three domains of psychosocial experiences of stroke survivors during the first month following discharge for acute stroke.

METHOD

Data were collected from 125 stroke survivors interviewed at 1 month following discharge home.

RESULTS

Findings indicate that changes in sense of self, connectedness with others, and community integration presented the major challenges.

Parental strain, parental health, and community characteristics among children with attention deficit-hyperactivity disorder

OBJECTIVE

It has been documented that parenting a child with attention deficit-hyperactivity disorder (ADHD) can cause family strain, but less is known about the added stress of additional child health diagnoses on levels of strain. This study explores the relationship between family stressors (such as child comorbid conditions) and family resources (such as social support, community characteristics, and parental health) on parental strain.

METHODS

We used the 2007 National Survey of Children's Health (NSCH) to identify children with ADHD and other comorbid mental and physical health conditions (n = 5473). Descriptive, bivariate, and multivariate analyses were conducted to explore the association between parental strain, social support, mother's mental health, and neighborhood amenities within groups of children with ADHD and comorbid conditions.

RESULTS

Parental strain was greatest when ADHD was paired with a conduct disorder, physical disorder, or other mental health disorder. Specifically, parental strain was greatest for children with ADHD plus a comorbid conduct disorder compared with ADHD alone. It was also greater for children with other mental and physical health diagnoses compared with children with ADHD alone. Better mental health of mothers in the sample is related to reduced parental strain. Greater access to social support and neighborhood amenities also are related to reduced parental strain.

CONCLUSIONS

Greater levels of social support and better mental health of parents is associated with decreased strain. Interventions aimed at relieving stress and building strategies to improve mental health can be beneficial for families with children with ADHD and comorbid conditions.

Racial and ethnic variation in ADHD, comorbid illnesses, and parental strain

Our objective was to understand the racial and ethnic variation in parental strain for non-Latino White, African American, and Latino parents of children with ADHD and other comorbid diagnoses. We selected 5,397 children with a current diagnosis of ADHD from the 2007 National Survey of Child Health (NSCH) and identified comorbid conditions that could cause additional parental strain. Multivariate regression analyses of parental strain, from ADHD plus comorbid physical and mental health conditions, varied by race and ethnicity in our sample. Additionally we found variables such as mother's mental health, family structure and social support to play significant roles in parental strain. These findings indicate a need for greater understanding of the family mechanisms in place that affect parental strain for these varying populations of families. Interventions to reduce parental strain also need to be tailored to the specific needs of racially and ethnically diverse parents of children with ADHD.

Using military friendships to optimize postdeployment reintegration for male Operation Iraqi Freedom/Operation Enduring Freedom veterans

Social relationships are important to health out comes. The postdeployment family reintegration literature focuses on the role of the civilian family in facilitating the transition from Active Duty military deployment to civilian society. The focus on the civilian family relationship may miss other important personal connections in veterans' lives. One such connection is the relationship many veterans have with former military unit members who served with them when deployed. Drawing on interviews with male Operation Iraqi Freedom/Operation Enduring Freedom veterans conducted from 2008 to 2009, we argue that the members of a military unit, especially during armed conflict, should be considered a resource to help the "family" reintegration process rather than impede it. This research has implications for current reintegration policy and how best to assist veterans transitioning into civilian society.

Social isolation poststroke: relationship between race/ethnicity, depression, and functional independence

Research suggests that individuals recovering from a stroke often experience social isolation, which is linked to increased depressive symptomatology and decreased ability to manage activities of daily living. Research also indicates that different racial and ethnic groups are more adversely affected than whites. This article uses poststroke narratives to explore the relationship between social isolation, depressive symptomatology, and the ability to manage activities of daily living poststroke for white, African American, and Puerto Rican veterans. Findings suggest those who were socially isolated during the first year of poststroke recovery reported higher levels of depressive symptoms and a decreased ability to manage daily activities. Implications for stroke rehabilitation practice are discussed.

Salud de la mujer: using fotonovelas to increase health literacy among Latinas

BACKGROUND

There is an identified need for health literacy strategies to be culturally sensitive and linguistically appropriate.

OBJECTIVES

The goal of our community-based participatory research (CBPR) project related to health and nutrition is to demonstrate that active community involvement in the creation of health education fotonovelas that are relevant to culture, ethnicity, gender, social class, and language can increase the health literacy of women in a disadvantaged community.

METHODS

We recruited 12 women to take part in our pilot fotonovela intervention about healthy eating and nutrition. Pre- and post-test assessments of knowledge, attitudes, and behavior around nutrition were given at baseline and will be collected after the completion of the project.

RESULTS

We hypothesize that post-test assessments of our participants will reveal increased nutrition knowledge as well as positive changes in attitudes and behavior toward healthy eating.

CONCLUSIONS

We believe that our fotonovelas will represent experiences of community members and encourage good health practices by increasing knowledge and cooperation among community members.

Racial/ethnic variation in recovery of motor function in stroke survivors: role of informal caregivers

Research documents that African American and Latinos who have experienced an acute stroke recover more slowly than Caucasians in the United States. This descriptive study examines (1) the variation in Caucasian, Puerto Rican, and African American motor function after stroke; (2) the association between caregiver attributes and motor recovery after stroke; and (3) the degree to which caregiver attributes explain the variation in motor recovery between different racial/ethnic groups. One hundred and thirty-five veterans who had been hospitalized after an acute stroke, released home, and identified an informal caregiver were enrolled in the study. Veterans and caregivers were surveyed at five time points over the course of 24 months. Results indicate that Puerto Ricans show greater impairment and African Americans show less impairment at discharge from the hospital compared with Caucasians. Caregiver characteristics mediate the racial/ethnic differences in impairment at discharge and motor recovery across time.

Informal caregivers and racial/ethnic variation in health service use of stroke survivors

We investigated the racial and ethnic variation in health service use among stroke survivors with informal caregivers in a number of Department of Veterans Affairs Medical Centers in one Veterans Integrated Service Network in the southeastern United States. We focused on the role of caregivers as an enabling factor in the use of health services. One hundred twenty-five veterans who had been hospitalized after an acute stroke, been released home, and identified an informal caregiver were enrolled in the study. Veterans and caregivers were surveyed at four time points over 12 months. Poisson multivariate regression analyses were used to model the relative risk (RR) of health service use. African Americans and Puerto Ricans were half as likely as Caucasians to use inpatient therapy services (RR = 0.522 and 0.494, respectively; p < 0.01), Puerto Ricans were less likely to be admitted to the hospital (RR = 0.689, p < 0.05), and Puerto Ricans were more likely to use outpatient services than Caucasians (RR = 1.230, p < 0.01). Stroke survivors that received more hours of informal care were associated with a higher likelihood of outpatient service use (RR = 1.01, p < 0.01). Stroke survivors living with their caregiver had a lower likelihood of inpatient therapy use (RR = 0.791, p < 0.01) and a higher likelihood of outpatient service use (RR = 1.17, p < 0.01). Greater likelihood of inpatient therapy (RR = 1.340, p < 0.01) and outpatient services (RR = 1.160, p < 0.05) was related to caregivers who received outside help. This study provides insight into the role of informal care in health service use for stroke survivors.

Sirolimus experience in heart transplantation

INTRODUCTION

Sirolimus is a potent, nonnephrotoxic immunosuppressant with antiproliferative activity in nonimmune cells. Recent data support the conversion in late renal failure secondary to calcineurin inhibitors (CNIs), with limited experience in de novo regimens in patients with predictive factors of postoperative renal impairment.

OBJECTIVE

We evaluated our experience of sirolimus-based immunosuppression administered to 25 heart transplant recipients.

METHODS

A retrospective analysis of 25 heart transplant recipients who received sirolimus included 17 conversions due to late CNI-related chronic renal dysfunction, six patients with a de novo regimen, and two patients who developed posttransplant pulmonary neoplasms. The conversion from CNI to sirolimus was started with 2 mg, with an average time after transplantation of 78 +/- 43 months and a mean baseline serum creatinine level of 2.1 +/- 0.45 mg/dL. The mean clinical follow-up was 17 +/- 9 months postconversion, and included echocardiography and laboratory studies. In the de novo group successive endomyocardial biopsies were performed during the first semester.

RESULTS

Serum creatinine fell from 2.1 +/- 0.45 mg/dL to 1.8 +/- 0.51 mg/dL (P = .012). Mean sirolimus levels were 15 +/- 9 ng/mL (doses 2.2 +/- 0.4 mg). This improvement continued until 3 months (creatinine 1.5 +/- 0.35 P < .01)/sirolimus levels 11.7 +/- 5 ng/mL [1.9 +/- 0.7 mg]), with maintenance at 6 months (1.58 +/- 0.3 mg/dL/14 +/- 4 ng/mL [1.85 +/- 0.7 mg]) and 1-year postconversion (1.53 +/- 0.39 mg/dL; P = .019/10.7 +/- 2.5 ng/mL [1.5 +/- 0.7 mg]). De novo, after a mean follow-up of 13 months (range 3 to 35), sirolimus appeared to increase the incidence of a moderate histological grade of rejection without hemodynamic compromise. Side effects were common (63%), including peripheral edema, skin eruptions, and pericardial effusion. Only one patient discontinued treatment, due to intestinal intolerance. Four patients died during follow-up: two because of lung neoplasms and two because of progressive graft vessel disease.

CONCLUSION

Sirolimus improved late CNI-related chronic renal dysfunction. Kidney function was preserved using a de novo CNI-free immunosuppressive regimen for recent cardiac transplant recipients.

Is an emergency heart transplantation justified?

INTRODUCTION

Emergency heart transplantation remains an important controversy due to the shortage of donors and the previously demonstrated results inferior to other patients. These recipients display a worse clinical status and their donors are more often considered suboptimal. Nevertheless, it is the only therapeutic option for patients with advanced cardiomyopathy and acute decompensation with no response to other therapies. We compared results among the emergency indication with those of elective transplants.

METHODS

We analyzed the 213 patients who underwent cardiac transplantation in our center up to December 2004 to compare emergency with elective heart transplantations for preoperative and surgical variables as well as outcomes.

RESULTS

A higher percentage of emergency patients were New York Heart Association class IV, displayed renal dysfunction, and were women. Regarding donors, a higher percentage were over 40 years of age. No differences were observed in the early and first-year mortality or morbidity rates, although we noted a greater 5-year mortality rate among emergency cases.

CONCLUSIONS

In our center emergency heart transplantation was associated with only slightly worse results compared with elective transplantations. Both donors and recipients should be carefully selected to improve results.

Metaphor shifts in stroke recovery

An illness event like stroke is generally believed to produce a biographical disruption in the individual, resulting in a reconstruction of one's self identity. One method of narrative reconstruction is the use of personal metaphor. Although previous research has illustrated a variety of illness metaphors, including that of war, there has been little research conducted on how these metaphors shift throughout a person's recovery period. The authors present data that indicate an intricate connection exists among changes in individuals' physical functioning, self-reported depression level, self-identity, and the metaphors they use to describe the stroke and stroke recovery experience. As the metaphor one uses to describe one's stroke experience shifts, so does one's sense of self. As one's self-identity changes, one's level of self-reported depression may also increase.

Combination Therapy With Sildenafil and Bosentan Reverts Severe Pulmonary Hypertension and Allows Heart Transplantation: Case Report

INTRODUCTION

Severe pulmonary hypertension with no response to vasodilators on an acute hemodynamic study is a contraindication to cardiac transplantation. The development of oral pulmonary vasodilators improves the prognosis in these patients. We present the case of a patient whose admission to the waiting list for cardiac transplantation was possible after 6 months of combination therapy with Sildenafil and Bosentan.

CASE REPORT

The patient was a 50-year-old man with severe dilated alcohol-induced cardiomyopathy. A pretransplantation study, including a right hemodynamic analysis, revealed irreversible pulmonary hypertension, with 59 mm Hg mean pulmonary artery pressure and 6.4 Wood IU pulmonary vascular resistance, with no response to acute vasodilators with nitric oxide or prostacyclin. Initially, heart transplantation was not possible and the patient started treatment with oral Sildenafil. After 6 months there was no improvement in echocardiographic or hemodynamic parameters, and combination therapy with Bosentan was started. With the combination therapy, the patient progressively improved clinically and hemodynamically, the pressures becoming normal at the sixth month, at which time he was included on the waiting list for a heart transplantation. Eight months later he received a graft with a good posttransplantation course, no right ventricular failure in the acute phase, and absence of pulmonary hypertension on echocardiogrphic and invasive studies.

CONCLUSION

Combinations of an oral pulmonary vasodilator with diverse action mechanisms may represent an alternative for patients with irreversible pulmonary hypertension who do not respond to monotherapy.

Is It Possible to Reduce the Number of Endomyocardial Biopsies With New Immunosuppressive Drugs?

INTRODUCTION

Using previous immunosuppressive regimens the considerable number of rejections of heart transplantations required routine surveillance myocardial biopsies, particularly during the early months. More effective immunosuppressive regimens would probably allow routine biopsies to be reduced. Our objectives were to assess the incidence of and the time to rejection with a new immunosuppressive protocol, considering the possibility of reducing the number of routine biopsies.

MATERIALS AND METHODS

We undertook a retrospective study of patients who had undergone heart transplantation from January 2002 to August 2005 and who received induction therapy with Daclizumab (two doses) and maintenance therapy with tacrolimus + mycophenolate + low doses of steroids.

RESULTS

Among 42 patients, 13 (31%) showed myocardial rejection in the first 3 months. All episodes were grade 3A and none had hemodynamic consequences. After 3 months, three patients (7.1%) experienced 3A rejection and 1 (2.4%), grade 4 acute rejection after ceasing medical treatment. Each episode of rejection was predictable, either owing to reduction in immunosuppression therapy or to a previous history of rejection.

CONCLUSIONS

The majority of rejection episodes occur in the first 3 months posttransplantation. After that time, the incidence of rejection is less and clinically predictable. Therefore, surveillance biopsies should be limited to the first 3 months, and performed later either in symptomatic patients (with a history of previous rejection) or in those whose immunosuppressive therapy needs to be reduced.

Use of oral sildenafil in patients with irreversible pulmonary hypertension not eligible for heart transplantation

Heart transplantation is contraindicated in patients with acute irreversible pulmonary hypertension (PH), but new drugs are opening up therapeutic possibilities. Sildenafil citrate is a nonselective pulmonary vasodilator that is being used in our hospital to treat several patients with PH and which has allowed the inclusion of 1 patient on the waiting list for heart transplantation. A 20-year-old man with Becker muscular dystrophy was diagnosed at the age of 19 years with dilated cardiomyopathy with severe pulmonary artery systolic pressure (PH = 60 mm Hg). A pretransplantation study, including a right hemodynamic analysis with an acute vasodilator test using intravenous epoprostenol, revealed the irreversible character of the PH. Inasmuch as the administration of dobutamine did not achieve an adequate reduction of PH, oral sildenafil was started (25 mg every 12 hours) as salvage therapy. An echocardiogram obtained 2 months after starting sildenafil therapy showed normal right cavities, previously dilated, as well as minimal protosystolic tricuspid regurgitation without PH. A new right hemodynamic study performed after 4 months showed a reduction in pulmonary vascular resistance, from 8 U to 3.5 U Woods. As a result, the patient has now been included on the waiting list for heart transplantation. The promising example of this patient confirms the necessity to carry out controlled trials to establish definitively the indications for the use of sildenafil in patients with irreversible PH.

Comparative Study of Muromonab-CD3 (OKT3) Versus Daclizumab (Zenapax) in Cardiac Transplantation at Our Center

Recent studies support the addition of new immunosuppressive drugs as cytolytic induction therapy in cardiac transplantation. We carried out a comparative study comprising 52 patients who had undergone cardiac transplantation at our center. Thirty patients received muromonab-CD3 (OKT3, Janssen-Cilag, The Netherlands) as the induction therapy, whereas 22 patients received Daclizumab (Zenapax, Hoffman-La Roche, Nutley, NJ, USA) instead. All patients received cyclosporine or tacrolimus, mycophenolate, and steroids. Over an average follow-up period of 23.21 +/- 18 months, we analyzed retrospectively the incidence of grade > or = 3A biopsy-confirmed acute rejection episodes, the presence of infectious processes at 1 and 6 months, the occurrence of significant secondary effects, and the necessity to modify the immunosuppressive therapy during the follow-up. The results suggest that daclizumab is linked to a decreased incidence of grade > or = 3A biopsy-confirmed acute rejection and to a reduced necessity to modify the immunosuppressive therapy during the medium-term follow-up.

Myocardial Preservation Using Celsior: Clinical Results in High-Risk Cardiac Transplantation

Graft failure during the first few days posttransplantation remains one of the main unresolved complications. The objective of this study was to evaluate the influence of Celsior preservation solution on the incidence of early graft failure in high-risk cardiac transplant recipients. A retrospective study was carried out evaluating the cardiac transplants in 179 heart recipients. The patients were divided into 2 groups: (1) Celsior preservation solution (n = 37), and (2) Control solution (n = 142). To evaluate the efficacy of the Celsior solution, a subgroup of transplants from older donors or with ischemia times greater than 4 hours was compared with the other cases. The incidence of early graft failure was lower among the Celsior subgroups with longer ischemia times or of older donors compared with the control groups. We conclude that preservation with Celsior solution in cardiac transplantation is safe and effective. It even has advantages to reduce early graft failure compared with conventional solutions, a benefit that may be more evident in subgroups at high risk for myocardial dysfunction.

Sirolimus Improves Renal Function in Cardiac Transplantation

In kidney and liver transplantation, sirolimus therapy has been shown to be comparable to cyclosporine in a head-to-head comparison, but it results in better preservation of renal reserve. In heart transplantation, information about the use of sirolimus is limited. We present the results of the progressive conversion from cyclosporine to sirolimus in a series of 8 heart transplant patients in whom renal dysfunction developed. The baseline creatinine level was 2.4 +/- 0.5 mg/dL, and plasma levels of cyclosporine were within the therapeutic range. After the introduction of sirolimus, the creatinine level fell within the first month to 1.76 +/- 0.2 mg/dL, or mean decrease of 0.6 +/- 0.25 mg/dL (P < .05). After 3 +/- 2.2 months the improvement continued (1.69 +/- 0.2 mg/dL). In 1 patient sirolimus was withdrawn during the first 24 hours, because of gastric intolerance. No patient developed an opportunist infection, allograft rejection, or important hematologic disorder. We conclude that sirolimus appears to be effective in heart transplant patients to improve renal function.

Aplasia of the cochlear nerve: a temporal bone study

OBJECTIVE

The purpose of this study was to evaluate the temporal bone findings in individuals with cochlear nerve aplasia.

STUDY DESIGN

Retrospective case review.

METHODS

Two individuals with unilateral profound deafness caused by aplasia of the cochlear nerve were identified. The temporal bones were processed, and the cochlear elements were quantified.

RESULTS

Histopathologic study of the temporal bones from these individuals demonstrate that a fully formed cochlea and normal-appearing organ of Corti can occur in the absence of the spiral ganglion and cochlear nerve. Cochlear nerve aplasia can occur in both a narrow or a normal-sized internal auditory canal.

CONCLUSION

These findings suggest that the development of the cochlea and organ of Corti are not dependent on the presence of the cochlear nerve and spiral ganglion. The entity of cochlear nerve aplasia in the presence of a normally formed cochlea must be considered when evaluating individuals as candidates for cochlear implantation.

Aminoglycoside ototoxicity: a human temporal bone study

OBJECTIVE

Hearing loss after aminoglycoside administration has been thought to result primarily from hair cell injury. The purpose of the study was to determine the potential for direct injury of spiral ganglion cells and hair cells in cases of documented human aminoglycoside ototoxicity.

STUDY DESIGN

Retrospective case review.

METHODS

The clinical course of two individuals with aminoglycoside ototoxicity are documented, including the details of administration of tobramycin and other ototoxic medication and serial audiograms. The temporal bones were processed, and the cochlear elements quantified.

RESULTS

Histopathological study of the temporal bones from the individuals in the study demonstrated reduction of both ganglion cell and hair cell populations. Spiral ganglion cell loss was not necessarily subadjacent to areas of hair cell loss in cases of aminoglycoside ototoxicity. Instead, spiral ganglion cell reduction may be present in segments of the cochlea with normal-appearing hair cells.

CONCLUSIONS

The study suggests that aminoglycoside antibiotics can injure spiral ganglion cells directly, as well as hair cells. Thus, the characteristic hearing loss of ototoxicity can result from degeneration of either cochlear element.

Antonio Scarpa and the discovery of the membranous inner ear

OBJECTIVE

To give a historical perspective of Antonio Scarpa's contributions to otology, specifically the discovery of the inner ear organs as the foundation for the experimental work that followed.

BACKGROUND/METHOD

Scarpa's original descriptions of the human inner ear were translated from the Latin text, and his illustrations were analyzed and compared with current knowledge.

CONCLUSIONS

Antonio Scarpa's anatomic and clinical studies place him among the great scientists of the eighteenth century. His discoveries about the inner ear established the limit of what could be learned without advanced histologic techniques and provided the foundation for the work that eventually led to the modern understanding of ear physiology.

Temporal bone histopathology in connexin 26-related hearing loss

OBJECTIVE

Mutations in GJB2, a gene that encodes a gap junction protein, Connexin 26 (Cx26), are responsible for approximately one third of sporadic severe-to-profound or profound congenital deafness and half of severe-to-profound or profound autosomal recessive nonsyndromic hearing loss (ARNSHL). Mouse mutants homozygous for knockouts of this gene are nonviable, precluding histopathologic studies of the associated inner ear pathology in this animal model. Therefore, we studied archival temporal bone sections to identify temporal bone donors with Cx26-related deafness.

STUDY DESIGN

Temporal bone donors with a history of congenital severe-to-profound or profound deafness were identified in the registry of the Temporal Bone Library at the University of Iowa. Histological findings were interpreted in a blinded fashion. DNA extracted from two celloidin-embedded mid-modiolar sections from each temporal bone was screened for the 35delG Cx26 mutation. The entire coding region of Cx26 was screened for other deafness-causing mutations if the 35delG mutation was detected.

RESULTS

Of five temporal bone donors with congenital severe-to-profound deafness, one donor was found to have Cx26-related deafness. This individual was a Cx26 compound heterozygote, carrying the 35delG mutation and a noncomplementary Cx26 missense mutation on the opposing allele. Microscopic evaluation of this temporal bone showed no neural degeneration, a good population of spiral ganglion cells, near-total degeneration of hair cells in the organ of Corti, a detached and rolled-up tectorial membrane, agenesis of the stria vascularis, and a large cyst in the scala media in the region of the stria vascularis.

CONCLUSION

This study is the first to report the temporal bone histopathology associated with Cx26-related deafness. Preservation of neurons in the spiral ganglion suggests that long-term successful habilitation with cochlear implants may be possible in persons with severe-to-profound or profound Cx26-related deafness.

The systemic vasodilatory action of protamine: is it inhibited or mediated by heparin?

The administration of protamine to neutralize the circulating heparin is common practice in cardiovascular surgery. The use of this drug is sometimes associated with hemodynamic alterations of varying degree and intensity (systemic hypotension, pulmonary hypertension and even cardiogenic shock). An intrinsic action of protamine has been suggested to be the cause of these vascular reactions. This action is blocked when protamine forms a complex with heparin, although in other cases it appears that the heparin-protamine complex is the factor responsible for these hemodynamic alterations. The aim of this experimental study was to characterize the vasodilatory action of protamine on the systemic circulation, determining whether or not it is dose-dependent; to analyze the role of endothelium; and to evaluate whether this vasodilatory effect is modified by the presence of heparin.

MATERIALS AND METHODS

The abdominal aorta was dissected from eight New Zealand rabbits and then sectioned into vascular rings for study in an organ chamber. Mechanical disruption of endothelium was performed on some rings (n = 14). Once submaximal contraction was reached (ClK 80 mM), protamine sulfate with a final concentration in the organ chamber of 80-400 micrograms/ml was added to one of the groups (n = 12). In the second group (n = 12), equal concentrations of protamine were tested in the presence of heparin at a final concentration of 100 U/ml.

RESULTS

The mean vasodilatation reached in the group of rings exposed only to protamine was 95.4 +/- 1.5% with respect to the submaximal contraction induced with ClK. In the second study group, the rings were exposed to protamine at equally increasing concentrations (80-400 micrograms/ml) but with the presence of heparin in the organ chamber. The mean vasodilatation in this group was 90 +/- 1.5. No statistically significant differences in vasodilatation were found between this group and the protamine without heparin group. On the other hand, in the endothelium-denuded rings (n = 14) exposed to isolated protamine and to protamine-heparin, no vasodilatory response was observed.

CONCLUSION

Our results show that the administration in vitro of protamine induces endothelium-dependent vasodilatation of the systemic circulation. Likewise, this relaxing effect mediated through endothelium is not blocked when protamine forms a complex with heparin in comparable concentrations of both drugs. Based on these preliminary findings, we believe that in high-risk patients the prevention of systemic vasodilatation and cardiovascular collapse produced by protamine should move towards the use of other substances that can neutralize the anticoagulant effect of heparin or towards pre-medication guidelines that prevent these secondary effects in the case of protamine administration.

Mitochondrial DNA deletions associated with aging and possibly presbycusis: a human archival temporal bone study

HYPOTHESIS

We attempted to determine if the common mitochondrial DNA aging deletion is also associated with presbycusis.

BACKGROUND

Presbycusis is the most common cause of deafness in adults in the United States, affecting approximately 40% of the population older than 75 years of age. The ability to identify a gene(s) or a specific genetic deficit(s) associated with presbycusis has significant clinical importance.

METHODS

The current study examined mitochondrial DNA (mtDNA) from cochlear sections of 34 human temporal bones: 17 with normal hearing and 17 with presbycusis. DNA was extracted from celloidin-embedded temporal bone sections; and specific oligonucleotide primers were designed to amplify the cytochrome b gene and a 4,977 base pair (bp) deletion of the mtDNA. Polymerase chain reaction (PCR) was used to amplify the base pair products that correspond to targeted gene regions, and sequencing was used to verify the products.

RESULTS

Fourteen of the 17 patients with hearing loss showed the 4,977 bp deletion and this deletion was present in only eight of the 17 human specimens with normal audiograms. The cytochrome b gene was amplified from all specimens.

CONCLUSIONS

The current study demonstrates the presence of a 4,977 bp deletion in human mitochondrial DNA genome that is associated with aging and with some forms of presbycusis. These results, coupled with previous animal studies, suggest that this 4,977 deletion may be associated with presbycusis.