Maureen Flattery

Influenza vaccination does not promote cellular or humoral activation among heart transplant recipients

BACKGROUND The impact of influenza vaccination on in vitro parameters of cellular and humoral immunity, anti-viral titers, and clinical outcome was evaluated among cardiac transplant recipients. METHODS Blood was collected from 29 patients before and 3-4 weeks after influenza vaccination and tested for phenotypic changes in lymphoid subpopulations and generation of antibodies against the allograft and vaccine. RESULTS Vaccination did not change the percentage of lymphoid subpopulations and did not induce generation of anti-HLA alloantibodies. Anti-vaccine response was detected in 12 of 29 patients and did not correlate with rejection history, length of graft survival, or immunosuppressive therapy. Vaccination did not change the frequency of rejection. Flu-like symptoms were reported in one patient but not confirmed microbiologically. CONCLUSION Despite the small number of patients in the study, influenza vaccination did not induce undesirable side effects, such as graft rejection or allo-sensitization. Generation of a positive anti-vaccine response was lower among the transplant recipients than healthy volunteers (41% vs. 80%). Clinical efficacy of the vaccine among the responders was not evaluated.

Cellular Immunity Impaired Among Patients on Left Ventricular Assist Device for 6 Months

BACKGROUND Sustained maintenance on left ventricular assist device (LVAD) is associated with an increased frequency of severe infections. Although temporary changes in cellular immunity are seen immediately after implantation, the consequence of sustained LVAD treatment on immunity is unknown. METHODS In vitro functional and phenotypic markers of T cell activation and 6 month clinical outcome were compared between patients with > or = 6-month LVAD therapy and heart failure control patients. RESULTS Recipients of LVADs had more infections (45.5% versus 0%; p < 0.05) and mortality (54% versus 16%; p < 0.05) than control patients. T-cell proliferative responses were lower among LVAD recipients than control patients when challenged with phytohemagglutinin (3.4 +/- 4.7 versus 28.5 +/- 19.6; p < 0.01), anti-CD3 (4.3 +/- 4.5 versus 16.4 +/- 17; p < 0.01), and staphylococcal enterotoxin B (7.2 +/- 6.3 versus 26.1 +/- 15.6; p = 0.002). Proliferative hyporesponsiveness among LVAD recipients was not caused by apoptosis (2.6% +/- 2.7% versus 2.7% +/- 2.1%; p = 0.94) or insufficient CD4+ cells (42.1% +/- 11.3% versus 40.2% +/- 7.5%; p = 0.71) relative to control patients. Instead, CD3+ cells from LVAD patients expressed less interleukin 2 (2.5% +/- 1.5% versus 5.2% +/- 3.1%; p = 0.03) and tumor necrosis factor-alpha (6.0% +/- 3.5% versus 25.8% +/- 8.7%; p < 0.001) and more interleukin 10 (5.8% +/- 6.1% versus 2.6% +/- 2.1%; p < 0.05). In addition, suppressive T-regulatory cells were more prevalent in LVAD patients than control patients (12.9% +/- 3.2% versus 1.2% +/- 1.1%; p < 0.001). CONCLUSIONS Cellular immunity is compromised among long-term LVAD recipients because of a downregulatory cytokine imbalance and emergence of suppressive T-regulatory cells.

Exercise blood pressure response during assisted circulatory support: Comparison of the total artifical heart with a left ventricular assist device during rehabilitation

BACKGROUND The total artificial heart (TAH) consists of two implantable pneumatic pumps that replace the heart and operate at a fixed ejection rate and ejection pressure. We evaluated the blood pressure (BP) response to exercise and exercise performance in patients with a TAH compared to those with a with a continuous-flow left ventricular assist device (LVAD). METHODS We conducted a single-center, retrospective study of 37 patients who received a TAH and 12 patients implanted with an LVAD. We measured the BP response during exercise, exercise duration and change in tolerated exercise workload over an 8-week period. RESULTS In patients with a TAH, baseline BP was 120/69 ± 13/13, exercise BP was 118/72 ± 15/10 and post-exercise BP was 120/72 ± 14/12. Mean arterial BP did not change with exercise in patients with a TAH (88 ± 10 vs 88 ± 11; p = 0.8), but increased in those with an LVAD (87 ± 8 vs 95 ± 13; p < 0.001). Although the mean arterial BP (MAP) was negatively correlated with metabolic equivalents (METs) achieved during exercise, the association was not statistically significant (β = -0.1, p = 0.4). MAP correlated positively with METs achieved in patients with LVADs (MAP: β = 0.26, p = 0.04). Despite the abnormal response to exercise, patients with a TAH participated in physical therapy (median: 5 days; interquartile range [IQR] 4 to 7 days) and treadmill exercise (19 days; IQR: 13 to 35 days) early after device implantation, with increased exercise intensity and duration over time. CONCLUSIONS During circulatory support with a TAH, the BP response to exercise was blunted. However, aerobic exercise training early after device implantation was found to be safe and feasible in a supervised setting.

Psychosocial Factors, Quality of Life, and Psychological Distress: Ethnic Differences in Patients with Heart Failure

Advances in treatment have prolonged life in heart failure (HF) patients, leading to increased attention to quality of life (QOL) and psychological functioning. It is not clear if ethnic differences exist in factors associated with psychological well-being. We examined psychosocial factors associated with depression and anxiety in 97 HF patients. Medical records were reviewed and patients (M age 53, 50% African American) completed surveys examining social support, coping, spirituality, and QOL for their association with depression and anxiety. Multiple regressions suggested that psychosocial factors were associated with psychological health. Patients with lower social support, lower meaning/peace and more negative coping reported greater depression; positive coping, and lower meaning/peace were associated with higher anxiety. Ethnicity stratified models suggested that spiritual well-being was associated with depression only among African Americans and QOL partially mediated this relationship. Findings suggest the importance of considering the unique psychosocial needs of diverse populations to appropriately target clinical interventions.

Implantable Mechanical Circulatory Support: Demystifying Patients With Ventricular Assist Devices and Artificial Hearts

Engineering advancements have expanded the role for mechanical circulatory support devices in the patient with heart failure. More patients with mechanical circulatory support are being discharged from the implanting institution and will be seen by clinicians outside the immediate surgical or heart‐failure team. This review provides a practical understanding of device design and physiology, general troubleshooting, and limitations and complications for implantable left ventricular assist devices (pulsatile‐flow and continuous‐flow pumps) and the total artificial heart.

Psychosocial assessment of candidates and risk classification of patients considered for durable mechanical circulatory support.

BACKGROUND The psychosocial assessment of candidates for transplantation (PACT), developed to assess candidates for heart transplant, has not been routinely used to assess left ventricular assist device (LVAD) candidacy. We examined the efficacy of the PACT to assess psychosocial outcomes in LVAD patients. METHODS We reviewed patients who received LVAD implants between June 2006 and April 2011 and retrospectively applied the PACT. We determined the accuracy of identifying social success with the PACT and revised domains to reflect criteria influencing social success for LVAD patients. RESULTS Forty-eight patients (72% men, 44% non-white, 50.4 years old) were divided into high-scoring and low-scoring groups. Nine patients with low PACT scores were falsely categorized as high-risk, whereas 4 with high scores had poor social outcomes. The score had a high positive-predictive value (0.86) but low negative-predictive value (0.31). The PACT was revised (modified [m]PACT) to measure indicators, such as social support and understanding of care requirements, identified to more closely affect LVAD outcome. The mPACT exhibited improved accuracy. A reclassification table was developed, and the net reclassification index was 0.32. The percentage of patients incorrectly classified for social risk decreased from 27% with the PACT to 8% with the mPACT. Patients with higher mPACT scores had decreased 30-day readmission rates (26% vs 67%, p = 0.045) after device implantation. CONCLUSIONS By emphasizing social support, psychologic health, lifestyle factors, and device understanding, the mPACT showed improved performance in risk-stratifying candidates for LVAD therapy. Prospective validation is warranted.

American Association of Heart Failure Nurses Position Paper on Educating Patients with Heart Failure

Heart failure (HF) affects nearly 6 million Americans, a number projected to increase by 46% in the year 2030.1 The diagnosis of HF necessitates that patients and families develop self-care skills and adopt lifestyle changes that facilitate controlling symptoms and slowing the progression of the disorder.2,3 These lifestyle changes include: managing a prescribed medication regimen; recognizing signs and symptoms of worsening HF; making dietary changes and adopting an individually tailored exercise program.2,3 In order to engage in self-care, persons with HF and their support systems need to acquire knowledge and skills specific to the health problem and the various pharmacologic therapies, devices, and nonpharmacologic interventions that are part of overall HF disease management.4 The aim of these efforts is to improve quality of life5 and increase survival. Thus, patient and family education is essential to prepare patients with HF for self-care. The American Nurses Association (ANA) Scope and Standards of Cardiovascular Nursing identifies patient education as a fundamental responsibility of the nurse.6 Since its inception in 2004, The American Association of Heart Failure Nurses (AAHFN) has been a participating organization in the development of all editions of the Cardiovascular Scope and Standards that guide HF nursing practice. Furthermore, multidisciplinary guidelines for the treatment of patients with HF include patient education as a highly recommended non-pharmacologic treatment.7e9 In addition, adherence with national standards that address patient education are required for program accreditation10 and certification.11e13 Heart failure discharge instructions for patients has been defined by The Joint Commission to include six topics: diet, exercise, weight monitoring, worsening symptoms, medications and follow up appointments.10,12 Thus, comprehensive patient education has been solidified as essential to patient care and is a responsibility of nursing.14 Heart failure patient education has had increased awareness and efforts to complete documentation of “discharge instructions”,15 yet such education has been performed using varied methods with uncertain effectiveness.11,12,16,17 Meaningful

Health literacy in heart transplantation: Prevalence, correlates and associations with health behaviors—Findings from the international BRIGHT study

BACKGROUND Health literacy (HL) is a major determinant of health outcomes; however, there are few studies exploring the role of HL among heart transplant recipients. The objectives of this study were to: (1) explore and compare the prevalence of inadequate HL among heart transplant recipients internationally; (2) determine the correlates of HL; and (3) assess the relationship between HL and health-related behaviors. METHODS A secondary analysis was conducted using data of the 1,365 adult patients from the BRIGHT study, an international multicenter, cross-sectional study that surveyed heart transplant recipients across 11 countries and 4 continents. Using the Subjective Health Literacy Screener, inadequate HL was operationalized as being confident in filling out medical forms none/a little/some of the time (HL score of 0 to 2). Correlates of HL were determined using backward stepwise logistic regression. The relationship between HL and the health-related behaviors were examined using hierarchical logistic regression. RESULTS Overall, 33.1% of the heart transplant recipients had inadequate HL. Lower education level (adjusted odds ratio [AOR] 0.24, p < 0.001), unemployment (AOR 0.69, p = 0.012) and country (residing in Brazil, AOR 0.25, p < 0.001) were shown to be associated with inadequate HL. Heart transplant recipients with adequate HL had higher odds of engaging in sufficient physical activity (AOR 1.6, p = 0.016). HL was not significantly associated with the other health behaviors. CONCLUSIONS Clinicians should recognize that almost one third of heart transplant participants have inadequate health literacy. Furthermore, they should adopt communication strategies that could mitigate the potential negative impact of inadequate HL.

Surveillance Endomyocardial Biopsy in the Modern Era Produces Low Diagnostic Yield for Cardiac Allograft Rejection.

Background The changing epidemiology of cardiac allograft rejection has prompted many to question the yield of surveillance endomyocardial biopsy (EMB) in heart transplantation (HT) patients. We sought to determine the yield of EMB in the modern era. Methods We evaluated 2597 EMBs in 182 consecutive HT patients who survived to their first EMB. The EMBs were categorized as asymptomatic or clinically driven and were compared based on era of antiproliferative therapy use at our center (early azathioprine era: 1990–2000 vs modern mycophenolate era: 2000–2011). Results In the modern era, patients had a higher prevalence of risk factors for developing rejection (≥ International Society of Heart and Lung Transplantation grade 2R); however, the frequency of rejection was decreased at all times (0–6 months: 60.2% vs 21.5%, P < 0.001, 6–12 months: 26.8% vs 1.8%, P < 0.001, 12–36 months: 32.3% vs 10.5%, P = 0.006). The yield of asymptomatic EMB decreased in the modern era between 0 and 6 months (10.9% vs 3.12%), 6 to 12 months (17% vs 0%), and years 2 to 3 (6.1% vs 1.5%). In the early era, the odds ratio of rejection during asymptomatic EMB compared to a clinically driven EMB was 0.47 (95% confidence interval, 0.31–0.71) and was decreased in the modern era (0.17 [0.07–0.42], P = 0.04). The probability of detecting rejection on asymptomatic EMB was significantly reduced in the modern era, even after adjustment for tacrolimus and induction therapy (1% vs 8%, P < 0.001). Conclusions The clinical yield of surveillance EMB has decreased in the modern era. The EMB in asymptomatic patients longer than 6 months after HT warrants further scrutiny.

Living with a total artificial heart: patients' perspectives.

Background:Advances in mechanical circulatory support have reduced morbidity and mortality in end-stage heart failure. To date, there have been no published studies examining the psychosocial impact on patients who are supported with a total artificial heart (TAH-t). Purpose:The purpose of this study was to describe the lived experience of patients currently supported by the TAH-t awaiting transplant. Methods:A qualitative method using Giorgi’s modification of phenomenologic inquiry guided the investigation, which was conducted at a transplant center located in the mid-Atlantic region of the United States. A purposive sample was selected to reflect participants currently supported by the TAH-t. All participants (9 men, 1 woman; mean age, 48.2 years; nonischemic etiology, 80%) were in-patients on the progressive care unit at the time of the interview and had been supported for at least 30 days. The mean length of device therapy was 84.7 days (range, 33–245 days). Findings:Hope for the future was the overarching theme. Subthemes included reflections, for better or for worse, the secret club, and coping and adaptation. The patients reflected on severity of illness, progress, and expressed optimism. For better or for worse described how symptoms improved but were offset by restrictions imposed by the technology. The secret club described the support provided to help deal with their life situation. Coping and adaptation suggested that the patients came to terms with and accepted their circumstances. Conclusions:The findings will help clinicians understand patients experiencing a life-changing situation and implications for psychosocial interventions.