A Prospective 1-Year Study of Changes in Neuropsychological Functioning After Implantable Cardioverter-Defibrillator Surgery

Cognitive Function of Recipients of Primary or Secondary Defibrillator Therapy: A Comparative Study Involving Nondefibrillator Patients With Systolic Heart Failure

BACKGROUND

The extent to which cognitive function differs between patients who receive implantable cardioverter-defibrillator (ICD) therapy and patients with heart failure (HF) who do not receive ICD therapy remains to be elucidated.

OBJECTIVES

The aim of this study was to compare the cognitive function between patients with primary or secondary ICDs and patients with HF without an ICD.

METHODS

This descriptive, comparative study included 116 patients who received ICDs and 74 patients with HF who did not receive ICDs. Patients underwent neuropsychological assessment for general cognition, memory, and executive function.

RESULTS

Immediate recall memory loss (18.9%) occurred more often in patients with HF without an ICD than in patients with primary (3.1%) and secondary (7.1%) ICDs (P = .018). After adjusting for age and education, delayed recall memory of patients with HF without ICDs was significantly worse than that of patients with primary ICDs (4.0 vs 6.5; P < .001), whereas delayed recall memory of patients with primary ICDs was better than that of patients with secondary ICDs (6.0 vs 6.5; P = .006). Executive function of patients with HF without ICDs was significantly worse than that of patients with primary (35 vs 58 seconds; P < .001) and secondary (28 vs 58 seconds; P = .0012) ICDs.

CONCLUSIONS

Patients with ICDs, regardless of primary or secondary indication, had less impairment of memory and executive function than patients with HF without ICDs, implying that ICD therapy did not interfere with cognitive performance. Cognitive screening as a part of routine care could be helpful for identifying impairment and implementing early cognitive training, especially in patients with HF.

Effect of physical and psychocognitive function and perceived health status on 12-month adverse cardiac events among implantable cardioverter-defibrillator recipients

BACKGROUND

Post-implant recovery in patients with implantable cardioverter-defibrillators (ICDs) is often compromised because of reduced physical and psycho-cognitive function and poor health perception, leading to short event-free survival.

OBJECTIVES

To examine the effects of psychocognitive function, health perception, and ICD-related factors on 12-month cardiac events among ICD patients.

METHODS

Using a prospective study design, ICD patients underwent baseline assessment and were followed for 12 months to assess cardiac events.

RESULTS

Cardiac events occurred in 14 patients (18.9%) (N = 74: age, 58 years; primary ICDs, 45.9%). Time after ICD implant (odds ratio [OR] = 1.002; p = .028) and executive function (OR = 1.021; p = .027) were significant predictors of 12-month cardiac events, while other physical and psychological indices were not.

CONCLUSIONS

Reduced executive function and longer time after implant predicted the events. Healthcare professionals need to assess executive function and provide treatment and support to improve executive function.

Changes in the Physical Function and Psychological Distress from Pre-Implant to 1, 6, and 12 Months Post-Implant in Patients Undergoing Implantable Cardioverter Defibrillator Therapy

Recipients of implantable cardioverter-defibrillator (ICD) therapy in Western countries often experience distressful physical and psychological adjustments. Sociocultural influences on post-implant recovery are likely; however, evidence from other ethnic/cultural backgrounds is lacking. This study aimed to examine the changes in physical function and psychological distress (anxiety and depressive symptoms) from pre-implant to one, six, and 12 months post-implant in Korean patients undergoing ICD therapy. A total of 34 patients underwent pre- to post-implant longitudinal assessments of physical and psychological function using mixed modeling procedures. Physical function significantly declined from pre-implant to one month post-implant (B = -10.05, p = 0.004) and then nearly returned to the pre-implant level at six months post-implant (B = 8.34, p = 0.028). This level of improvement continued through 12 months post-implant. In psychological distress, significant improvements were observed from pre-implant to one month (anxiety (B = -1.20, p = 0.020) and in depressive symptoms (B = -1.15, p = 0.037)), which then plateaued without significant changes from one to 12 months. We concluded that physical function recovery occurred six months post-implant, but function remained poor until 12 months post-implant. Psychological distress improved one month post-implant and it was maintained. Clinicians must provide more intensive interventions to improve long-term physical function after ICD therapy.

Patient-reported outcomes at hospital discharge among patients with arrhythmia: Results from the national DenHeart survey

BACKGROUND

Patient-reported outcomes are important predictors of mortality, cardiovascular events and hospitalisation in patients with cardiac diseases, but differences in patient-reported outcomes between groups of patients with arrhythmia have not yet been investigated.

AIMS

To describe and compare patient-reported outcomes at discharge among patients with different types of cardiac arrhythmia and to examine the associations between demographic characteristics, inhospital factors and patient-reported outcomes.

METHODS

Data were derived from the national DenHeart study including patient-reported outcomes from the following questionnaires: the hospital anxiety and depression scale (HADS), HeartQoL, short form 12 (SF-12), current health status (EQ-5D), brief illness perception questionnaire (B-IPQ) and the Edmonton symptom assessment scale (ESAS). Clinical and demographic data were obtained from national registers. Multiple linear and logistic regression models were used to investigate the associations between the potential risk factors and the patient-reported outcomes.

RESULTS

A total of 4251 patients diagnosed with arrhythmia completed the questionnaire. Across the arrhythmia subgroups, some differences were observed. In general, patient-reported outcome scores were worst among patients with 'ventricular arrhythmia' (e.g. highest depression scores and highest prevalence of feeling unsafe at discharge). Regression analysis revealed that longer hospital stay, female gender, being unmarried and having a short education were significantly associated with poor health for almost all arrhythmia subgroups.

CONCLUSION

Differences exist in self-reported health, quality of life and symptom burden across arrhythmia groups with patients with ventricular arrhythmia reporting poorer patient-reported outcomes. Longer hospital stay, female gender, being unmarried and having a low level of education were significantly associated with worse outcomes among the total population.

Implantable cardioverter defibrillator knowledge and end-of-life device deactivation: A cross-sectional survey

BACKGROUND

End-of-life implantable cardioverter defibrillator deactivation discussions should commence before device implantation and be ongoing, yet many implantable cardioverter defibrillators remain active in patients' last days.

AIM

To examine associations among implantable cardioverter defibrillator knowledge, patient characteristics and attitudes to implantable cardioverter defibrillator deactivation.

DESIGN

Cross-sectional survey using the Experiences, Attitudes and Knowledge of End-of-Life Issues in Implantable Cardioverter Defibrillator Patients Questionnaire. Participants were classified as insufficient or sufficient implantable cardioverter defibrillator knowledge and the two groups were compared.

SETTING/PARTICIPANTS

Implantable cardioverter defibrillator recipients ( n = 270, mean age 61 ± 14 years; 73% male) were recruited from cardiology and implantable cardioverter defibrillator clinics attached to two tertiary hospitals in Melbourne, Australia, and two in Kentucky, the United States.

RESULTS

Participants with insufficient implantable cardioverter defibrillator knowledge ( n = 77, 29%) were significantly older (mean age 66 vs 60 years, p = 0.001), less likely to be Caucasian (77% vs 87%, p  = 0.047), less likely to have received implantable cardioverter defibrillator shocks (26% vs 40%, p = 0.031), and more likely to have indications of mild cognitive impairment (Montreal Cognitive Assessment score <24: 44% vs 16%, p < 0.001). Insufficient implantable cardioverter defibrillator knowledge was associated with attitudes suggesting unwillingness to discuss implantable cardioverter defibrillator deactivation, even during the last days towards end of life ( p < 0.05).

CONCLUSION

Implantable cardioverter defibrillator recipients, especially those who are older or have mild cognitive impairment, often have limited knowledge about implantable cardioverter defibrillator deactivation. This study identified several potential teachable moments throughout the patients' treatment trajectory. An interdisciplinary approach is required to ensure that discussions about implantable cardioverter defibrillator deactivation issues are initiated at appropriate time points, with family members ideally also included.

Effect of psycho-educational interventions on quality of life in patients with implantable cardioverter defibrillators: a meta-analysis of randomized controlled trials

Background

Implantable cardioverter defibrillators (ICD) were developed for primary and secondary prevention of sudden cardiac death. However, ICD recipients’ mortality is significantly predicted by their quality of life (QOL). The aim of this meta-analysis was to evaluate the effects of psycho-educational interventions on QOL in patients with ICDs.

Methods

We systematically searched PubMed, Medline, Cochrane Library, and CINAHL through April 2015 and references of relevant articles. Studies were reviewed if they met following criteria: (1) randomized controlled trial, (2) participants were adults with an ICD, and (3) data were sufficient to evaluate the effect of psychological or educational interventions on QOL measured by the SF-36 or SF-12. Studies were independently selected and their data were extracted by two reviewers. Study quality was evaluated using a modified Jadad scale. The meta-analysis was conducted using the Cochrane Collaboration’s Review Manager Software Package (RevMan 5). Study heterogeneity was assessed by Q statistics and I² statistic. Depending on heterogeneity, data were pooled across trials using fixed-effect or random-effect modeling.

Results

Seven randomized controlled trials fulfilled the inclusion and exclusion criteria, and included 1017 participants. The psycho-educational interventions improved physical component summary (PCS) scores in the intervention groups more than in control groups (mean difference 2.08, 95 % CI 0.86 to 3.29, p < 0.001), but did not significantly affect mental component summary (MCS) scores (mean difference 0.84, 95 % CI -1.68 to 3.35, p = 0.52).

Conclusion

Our meta-analysis demonstrates that psycho-educational interventions improved the physical component, but not the mental component of QOL in patients with ICDs.

Positive Psychotherapy to Improve Autonomic Function and Mood in ICD Patients (PAM-ICD): Rationale and Design of an RCT Currently Underway

BACKGROUND

Improving mental and physical health of patients with implantable cardioverter defibrillators (ICD) is critical because this group is at high risk for ventricular arrhythmias and sudden death and depressed or anxious cardiovascular disease (CVD) patients appear to be at even higher risk for mortality compared to nondepressed or nonanxious CVD patients. Further, autonomic dysfunction is present in these patients, and negative emotions and arrhythmias form a downward spiral further worsening mood, well-being, and cardiovascular health. Much research demonstrates that positive emotion is related to health benefits, improved physiology, and increased survival.

METHODS AND RESULTS

This is a two-arm randomized controlled trial aiming to recruit 60 adult ICD patients comparing 12 individually delivered, weekly sessions of: (1) a positive emotion-focused cognitive-behavioral therapy (Quality of Life Therapy [QOLT]), and (2) Heart Healthy Education. Autonomic functioning, heart rhythm indices, and psychosocial health are measured at baseline, 3 months, and 9 months. The first goal is feasibility and acceptability, with the primary outcome being arrhythmic event frequency data.

CONCLUSION

This study is designed to test whether QOLT produces changes in mood, quality of life/well-being, autonomic function, and arrhythmic and ICD therapy event rates. This feasibility trial is a foundational step for the next trial of QOLT to help determine whether a 3-month QOLT trial can reduce arrhythmias occurrences among ICD patients, and examine a mechanism of autonomic functioning. This study may help to develop and implement new medical or psychological therapies for ICD patients.

Change in cognitive function over 12 months among patients with an implantable cardioverter-defibrillator

BACKGROUND

Patients with implantable cardioverter-defibrillators (ICDs) have decreased cognitive function associated with arrhythmic and/or cardiac disorders, such as ischemic cardiomyopathy. Little is known about changes in cognitive function over time among ICD patients.

AIMS

The aim of this study was to evaluate baseline-to-12-month changes in cognitive function in memory (total recall and delayed recall), psychomotor speed, and executive function among ICD patients.

METHODS

In this prospective study, 115 (mean [SD] age, 64.83 [9.06] years, 75% mean) and 77 ICD patients completed baseline and 12-month face-to-face interviews, respectively, which included neuropsychological tests to evaluate cognitive function.

RESULTS

Patients who completed baseline and 12-month testing had decreased total and delayed recall memory (all P < .05). No significant changes from baseline to 12 months were observed in psychomotor speed (t = 0.33; P = .74) and executive function (t = -1.12; P = .27). Using 1.0 standard deviation or below the mean as a cutoff criterion, 12% to 22% of ICD patients had poor cognitive function over time. Particularly, at baseline, 17 (15%) and 15 (13%) of the 115 patients had poor memory in total and delayed recall, respectively. At 12 months, 12 (16%) and 9 (12%) of the 77 patients had poor memory in total and delayed recall, respectively.

CONCLUSIONS

In this sample of patients with ICDs, memory was poor at baseline and decreased over 12 months. Future studies are indicated to determine how this change in memory influences outcomes such as medication adherence.