Readmissions and mortality in delirious versus non-delirious octogenarian patients after aortic valve therapy: a prospective cohort study

A family intervention to prevent postoperative delirium in patients undergoing cardiac valve surgery: A randomized controlled study

BACKGROUND

Multiple guidelines recommend that families be involved in the care of ICU patients, which has been widely used in ICU delirium management in recent years. Postoperative delirium (POD) occurs frequently after cardiac surgery and is associated with poor outcomes; however, the effects of family intervention on this group are rarely studied.

OBJECTIVES

This study aimed to investigate the effects of family intervention on the incidence of POD and the ICU prognoses of patients undergoing cardiac valve surgery.

METHODS

This was a two-group, single-blind, randomized controlled trial involving 80 patients undergoing cardiac valve surgery, with 40 patients in each group. The control group received routine ICU visits, and the experimental group implemented a family intervention that instructed family caregivers to participate in delirium management during ICU visits. The occurrence of POD, ICU stay, mechanical ventilation time of patients; as well as the anxiety, depression, and satisfaction levels of family caregivers were compared between the two groups.

RESULTS

The incidence of POD and ICU stay of patients were significantly lower in the experimental group compared to the control group (P < 0.05). The anxiety and depression incidence of family caregivers in the experimental group was lower than those of the control group (P < 0.05), and satisfaction scores were higher than those of the control group (P < 0.05).

CONCLUSIONS

Family intervention has the potential to reduce the incidence of POD in patients undergoing cardiac valve surgery, shorten ICU stays, reduce the incidence of anxiety and depression in family caregivers, and improve their satisfaction. These findings suggest that family intervention could be incorporated into routine nursing practice.

Anxiety and depression in patients aged 80 years and older following aortic valve therapy. A six-month follow-up study

BACKGROUND

Little is known about mental health following advanced cardiac procedures in the oldest patients.

AIMS

To study changes in anxiety and depression from baseline to one- and six-month follow-up in older patients following transcatheter aortic valve implantation (TAVI) or surgical aortic valve replacement (SAVR).

METHODS

Prospective cohort study of patients ≥ 80 years undergoing elective TAVI or SAVR in a tertiary university hospital. Anxiety and depression were assessed with the Hospital Anxiety and Depression Scale. Differences between TAVI/SAVR were analyzed using Welch's t test or chi-squared. Changes over time and group differences were established with longitudinal models using generalized least squares.

RESULTS

In 143 patients (83.5 ± 2.7 years), 46% (n = 65) received TAVI. Anxiety was identified in 11% of TAVI patients at baseline. One- and six-months later, percentages were 8% and 9%. In SAVR patients, 18% had baseline scores indicating anxiety. One and six-months later, percentages were 11% and 9%. Depression was identified in 15% of TAVI patients. One- and six-months later, percentages were 11% and 17%. At baseline, 11% of SAVR patients had scores indicating depression. One- and six-months after SAVR, percentages were 15% and 12%. Longitudinal analyses showed reductions (P < 0.001) in anxiety from baseline to one-month, and stable scores between one- and six-months for both treatment groups. There was no change over time for depression among treatment groups (P = 0.21).

DISCUSSION AND CONCLUSIONS

SAVR or TAVI in patients ≥ 80 years was associated with anxiety reduction between baseline and follow-up. For depression, there was no evidence of change over time in either treatment group.

Incidence and predictors of hemodynamic compromise due to high-grade AV block after TAVI

Background

High-grade AV block (HAVB) is the most frequent adverse event after transcatheter aortic valve implantation (TAVI). In rare cases, HAVB is associated with hemodynamic compromise (HC) followed by syncope or application of cardiopulmonary resuscitation (CPR), but data on this severe complication are scarce. The aim of the present study was to investigate the incidence and predictors of HC due to HAVB in patients undergoing TAVI.

Methods

In this retrospective analysis of 4,602 TAVI cases between 2010 and 2022, 466 developed HAVB. Baseline characteristics and procedural and postprocedural findings were compared for patients with HC versus those without. Univariate and multivariable regression analyses were used to investigate independent predictors of HC.

Results

Forty-nine of 466 patients (10.5%) had HC due to HAVB after TAVI. Patients with HC had a longer hospital stay [10 (8-13) vs. 13 (9-18) days; p < 0.001], more frequent peripheral artery disease (PAD) (28.6% vs. 15.1%; p = 0.016), and lower hemoglobin levels [11.8 (±) vs. 12.5 (±) g/dl; p = 0.006]. In the HC group, HAVB onset post-TAVI was delayed compared with the non-HC group [2 (1-4) vs. 1 (0-3) days; p < 0.001]. Before HAVB onset, patients in the HC group more frequently developed post-TAVI delirium [18 (4.6%) vs. 11 (25.0%); p < 0.001]. In univariate regression analysis, PAD, hemoglobin, procedural time, contrast agent volume, and post-TAVI delirium were significant predictors of HC. After adjustment, only post-TAVI delirium and contrast agent volume remained independent predictors [OR 3.22 (95% CI: 1.05-9.89); p = 0.042 and OR: 1.01 (95% CI: 1.0-1.01); p = 0.04, respectively].

Conclusion

HC due to HAVB after TAVI occurred in over 10% of cases. Development of post-TAVI delirium and contrast agent volume are independent predictors of this severe complication.

The impact of frailty on adverse outcomes after transcatheter aortic valve replacement in older adults: A retrospective cohort study

Background

Transcatheter aortic valve replacement (TAVR) is an effective alternative to surgical aortic valve replacement for patients who are at increased surgical risk. Consequently, frailty is common in patients undergoing TAVR.

Objectives

This study aims to investigate the impact of frailty on outcomes following TAVR.

Methods

A retrospective cohort study was conducted, including all TAVR candidates who visited the geriatric outpatient clinic for preoperative screening. Frailty status was assessed according to the Groningen Frailty Indicator. The primary outcome of the study was defined as the occurrence of postoperative complications, and this was evaluated according to the Clavien–Dindo classification. An additional analysis was performed to assess the impact of frailty on 1‐year all‐cause mortality and complications within 30 days of TAVR according to the Valve Academic Research Consortium (VARC‐2) criteria. The VARC‐2 criteria provide harmonized endpoint definitions for TAVR studies.

Results

In total, 431 patients with a mean age of 80.8 ± 6.2 years were included, of whom 56% were female. Frailty was present in 36% of the participants. Frailty was associated with a higher risk of the composite outcome of complications [adjusted odds ratio (OR): 1.55 (95% confidence interval, CI: 1.03–2.34)], 30‐day mortality [adjusted OR: 4.84 (95% CI: 1.62–14.49)], 3‐month mortality [adjusted OR: 2.52 (95% CI: 1.00–6.28)] and 1‐year mortality [adjusted OR: 2.96 (95% CI: 1.46–6.00)].

Conclusions

Frailty is common in TAVR patients and is associated with an increased overall risk of postoperative complications, particularly mortality. Increased optimization of screening and treatment of frailty in the guidelines for valvular heart diseases is recommended.

Intraoperative hypotension and delirium among older adults undergoing transcatheter aortic valve replacement

Background

Postoperative delirium (POD) is a frequently observed complication after transcatheter aortic valve replacement (TAVR). The effects of intraoperative hypotension (IOH) on POD occurrence are currently unclear.

Methods

A retrospective observational cohort study of patients who underwent TAVR was conducted. We predefined IOH as area under the threshold (AUT) of five mean arterial blood pressures (MBP), varying from <100 to <60 mmHg. The AUT consisted of the combination of duration and depth under the MBP thresholds, expressed in mmHg*min. All MBP AUTs were computed based on the complete procedure, independent of procedural phase or duration.

Results

This cohort included 675 patients who underwent TAVR under general anesthesia (n = 128, 19%) or procedural sedation (n = 547, 81%). Delirium occurred mostly during the first 2 days after TAVR, and was observed in n = 93 (14%) cases. Furthermore, 674, 672, 663, 630, and 518 patients had at least 1 min intraoperative MBP <100, <90, <80, <70, and <60 mmHg, respectively. Patients who developed POD had higher AUT based on all five MBP thresholds during TAVR. The penalized adjusted odds ratio varied between 1.08 (99% confidence interval [CI] 0.74–1.56) for the AUT based on MBP < 100 mmHg and OR 1.06 (99% CI 0.88–1.28) for the AUT based on MBP < 60 mmHg.

Conclusions

Intraoperative hypotension is frequently observed during TAVR, but not independently associated with POD after TAVR. Other potential factors than intraoperative hypotension may explain the occurrence of delirium after TAVR.

Delirium in older patients undergoing aortic valve replacement: incidence, predictors, and cognitive prognosis

Background

Transcatheter aortic valve replacement is increasingly performed in frail older patients who were previously ineligible for a standard surgical procedure. The objectives of this study are to determine delirium incidence, predictors, and relationship with cognitive performance at 3-month follow-up in older patients undergoing aortic valve replacement (AVR).

Methods

Patients (N = 93) aged 70 years and older, undergoing transcatheter (TAVR, N = 66) or surgical (SAVR, N = 27) aortic valve replacement in an academic medical center were enrolled in this prospective cohort study. Delirium was assessed using the Confusion Assessment Method (CAM) on postoperative days 1, 2, 3, and 7. Data on patients’ socio-demographics, functional status (including instrumental activities of daily living (IADL), and surgical risk scores (including Society of Thoracic Surgeons (STS) risk score), were collected at baseline. Cognitive status was assessed with the Mini-Mental Status Exam (MMSE) and the Clock Drawing Test (CDT) at baseline and 3 months after AVR.

Results

Delirium occurred in 21 (23%) patients, within the first three postoperative days in 95% (20/21) of the cases. Delirium incidence was lower in TAVR (13/66 = 20%) than SAVR (8/27 = 30%) patients, but this difference was not statistically significant (p = .298). Patients with delirium had lower baseline cognitive performance (median MMSE score 27.0 ± 3.0 vs 28.0 ± 3.0, p = .029), lower performance in IADL (7.0 vs 8.0, p = .038), and higher STS risk scores (4.7 ± 2.7 vs 2.9 ± 2.3, p = .020). In multivariate analyses, patients with intermediate (score > 3 to ≤8) and high (score > 8) STS risk scores had 4.3 (95%CI 1.2–15.1, p = .025) and 16.5 (95%CI 2.0–138.2, p = .010), respectively, higher odds of incident delirium compared to patients with low (score ≤ 3) STS risk scores. At 3-month follow-up (N = 77), patients with delirium still had lower MMSE score (27.0 ± 8.0 vs 28.0 ± 2.0, p = .007) but this difference did not remain significant once adjusting for baseline MMSE (β-coefficient 1.11, 95%CI [− 3.03–0.80], p = .248).

Conclusions

Delirium occurred in about one in five older patients undergoing AVR, almost essentially within the first three postoperative days. Beside cognitive performance, STS risk score could enhance the identification of high-risk older patients to better target preventative interventions.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12877-021-02100-5.

Octogenarian patients' sleep and delirium experiences in hospital and four years after aortic valve replacement: a qualitative interview study

OBJECTIVES

Sleep disturbances and delirium are frequently observed complications after surgical aortic valve replacement (SAVR) and transcutaneous aortic valve implantation (TAVI), especially in octogenarian patients. However, a knowledge gap exists on patient experiences of sleep and delirium. In particular, patients' long-term sleep and delirium experiences are unknown. This article explores and describes how octogenarian patients suffering from delirium after aortic valve replacement experience their sleep and delirium situation.

DESIGN

An explorative and descriptive design with a longitudinal qualitative approach was applied. Qualitative content analysis following the recommended steps of Graneheim and Lundman was performed.

SETTING

Patients were included at a tertiary university hospital with 1400 beds. Delirium and insomnia screening was performed at baseline and five postoperative days after aortic valve treatment. For qualitative data, 10 patients were interviewed 6-12 months after treatment with focus on delirium. Five of these patients were reinterviewed 4 years after treatment, with focus on their sleep situation.

PARTICIPANTS

Inclusion criteria; age 80+, treated with SAVR or TAVI and had experienced delirium after treatment.

RESULTS

For the initial interview, we included five men and five women, four following TAVI and six following SAVR, mean age 83. One overarching theme revealed from the content analyses; Hours in bed represented emotional chaos. Whereas three subthemes described the patients' experiences with sleep and delirium, a cascade of distressful experiences disturbing sleep, the struggle between sleep and activity and elements influencing sleep. Four years after the treatment, sleep disturbances persisted, and patients still remembered strongly the delirium incidences.

CONCLUSIONS

For octogenarian patients, sleep disturbances and delirium are long-term burdens and need a greater attention in order to improve patient care.

Dynamics of cerebral oxygenation during rapid ventricular pacing and its impact on outcome in transfemoral transcatheter aortic valve implantation

BACKGROUND

Cerebral O₂ saturation (ScO₂ ) reflects cerebral perfusion and can be measured noninvasively by near-infrared spectroscopy (NIRS).

OBJECTIVES

In this pilot study, we describe the dynamics of ScO₂ during TAVI in nonventilated patients and its impact on procedural outcome.

METHODS AND RESULTS

We measured ScO₂ of both frontal lobes continuously by NIRS in 50 consecutive analgo-sedated patients undergoing transfemoral TAVI (female 58%, mean age 80.8 years). Compared to baseline ScO₂ dropped significantly during RVP (59.3% vs. 53.9%, p < .01). Five minutes after RVP ScO₂ values normalized (post RVP 62.6% vs. 53.9% during RVP, p < .01; pre 61.6% vs. post RVP 62.6%, p = .53). Patients with an intraprocedural pathological ScO₂ decline of >20% (n = 13) had higher EuroSCORE II (3.42% vs. 5.7%, p = .020) and experienced more often delirium (24% vs. 62%, p = .015) and stroke (0% vs. 23%, p < .01) after TAVI. Multivariable logistic regression revealed higher age and large ScO₂ drops as independent risk factors for delirium.

CONCLUSIONS

During RVP ScO₂ significantly declined compared to baseline. A ScO₂ decline of >20% is associated with a higher incidence of delirium and stroke and a valid cut-off value to screen for these complications. NIRS measurement during TAVI procedure may be an easy to implement diagnostic tool to detect patients at high risks for cerebrovascular complications and delirium.

Virtual reality-assisted conscious sedation during transcatheter aortic valve implantation: a randomised pilot study

AIMS

Virtual reality (VR) has been used successfully in different clinical settings to treat anxiety. This prospective, randomised pilot study aimed to investigate the feasibility and safety of VR in patients undergoing conscious sedation during transfemoral transcatheter aortic valve implantation (TAVI).

METHODS AND RESULTS

Thirty-two patients were included and randomised to VR intervention (n=16) or control (n=16). In the intervention group, patient-selected relaxing 3D videos were projected during the TAVI procedure; pain and anxiety before and after TAVI were measured using visual analogue scales (VAS; 0-10). The median age was 83 years (IQR 78.25-87). Patients' baseline characteristics did not differ significantly between the groups. During TAVI under conscious sedation, the median duration of VR intervention was 30.5 minutes (IQR 23.5-46); 81.3% of the patients watched the videos until device implantation, 37.5% during the whole procedure. The VR intervention group reported significantly less anxiety after the procedure (VAS 2 [IQR 0-3.75] vs 5 [IQR 2-8], p=0.04) than patients randomised to control. In the intervention group, 93.8% would use VR during TAVI again. Nausea and vomiting did not occur more frequently compared to control.

CONCLUSIONS

VR interventions during TAVI to assist conscious sedation are safe and feasible, even in very old and frail patients. In this small cohort, there was a significant reduction in periprocedural anxiety.

Evaluating Pain, Opioids, and Delirium in Critically Ill Older Adults

Untreated pain and pain management with opioids are independent precipitating factors for delirium. This retrospective study evaluated the relationships among pain severity, its management with opioids, and the onset of delirium in older adult patients admitted to the surgical intensive care unit (SICU). Consecutive patients aged 65 or greater admitted to the SICU over a 5-month period were examined (n = 172). When assessed using a multivariable general estimating equation model, opioids (chi-square [χ²], 12.34, p = .0004), but not pain (χ², 3.31, p = .0688) were significant in predicting next-day delirium status. Controlling for pain, patients exposed to opioids were 2.5 times more likely to develop delirium than patients not exposed (95% Confidence Interval: 1.44-4.36). Our data shows that opioid administration predicted the onset of next-day delirium. In an effort to prevent delirium, future research should focus on opioid-sparing pain management approaches to mitigate pain and delirium.

A call to action for delirium research: Meta-analysis and regression of delirium associated mortality

Background

Delirium is an extremely common hospital complication. No study to date has assessed whether a priori defined covariates; type of hospital setting and year of study publication, influence the relationship between delirium and mortality. This is also the first study to examine the longitudinal trend of delirium-associated mortality over recent decades, to analyse the trajectory of our efforts in combating this disease.

Methods

MEDLINE, EMBASE and PsycINFO, were searched from January 1981 to May 2018 for English-language primary articles. Rigorous title and abstract screen and full-text screen were conducted independently by two reviewers. This paper adhered to MOOSE guidelines. Data was extracted independently by one reviewer using standardised data-collection sheets, with a separate reviewer verifying for accuracy. The quality of included studies was assessed using the Newcastle-Ottawa Quality Assessment Scale. Unadjusted effect sizes and event counts were analysed with a random effects model in primary meta-analysis and meta-regression, whereas a mixed effect model was used in secondary sub-group analysis. Mortality data at longest follow-up and cumulative mortality (hospital mortality combined with mortality at longest follow-up) data were analysed.

Results

As part of a larger project, 446 of 6790 articles were retrieved, including 71 studies that measured mortality. Our results demonstrate that elderly inpatients with delirium had significantly greater odds of mortality (OR 3.18 [95%CI: 2.73, 3.70]) compared to non-delirious controls. Patients with delirium in the ICU had the highest odds for mortality (OR: 7.09 [95%CI: 3.60, 14.0]); double the risk compared to the average. Curiously, despite advancements in delirium research, delirium associated in-hospital odds of mortality has not changed in 30 years.

Conclusion

This is the largest meta-analysis to confirm the association between delirium and mortality, in older (age ≥ 65) hospital inpatients.

The current meta-analysis highlights the significant odds of mortality after an episode of delirium, and these odds are much higher for ICU patients. However, in contrast to other medical conditions that have seen a decrease in associated mortality over the past few decades, delirium associated mortality remains unchanged. These findings underscore the urgent need for better delirium treatments.

PROSPERO Registration Number: CRD42018098627, https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=98627

Evaluating delirium outcomes among older adults in the surgical intensive care unit

BACKGROUND

Delirium is prevalent in hospitalized older adults. Little is known about delirium among older adults admitted to the surgical intensive care unit (SICU).

OBJECTIVES

The purpose of this study was to describe the incidence of delirium, length of stay, 30-day readmission and mortality rates experienced by older adults in the SICU before and after a nurse-driven protocol for delirium-informed care.

METHODS

This study employed a retrospective observational cohort design. Consecutive patients 65 years or older admitted to the SICU over six-month periods were compared before (n = 101) and following (n = 172) a nurse-driven protocol for delirium-informed care. Patient-level outcomes included incidence delirium, SICU and hospital length of stay, 30-day readmission and mortality rates. All measures were collected using medical record review.

RESULTS

In the pre- and post-intervention cohorts, 37% (37/101) and 33% (56/172) of patients screened positive for delirium, respectively. Following implementation of the delirium-informed care intervention, the number of days where no CAM-ICU assessment was performed significantly decreased (Pre 1.1 ± 1.4; Post 0.45 ± 0.65; p <0.001) and the number of negative assessments significantly increased (Pre 2.45 ± 1.66; Post 2.94 ± 1.69; p < 0.0178), indicating that nurses post-intervention were more consistently assessing for delirium.

CONCLUSIONS

This study failed to show improvements in patient outcomes (SICU and hospital length of stay, 30-day readmission and mortality rates), before and following a delirium-informed care intervention. However, positive trends in the data suggest that delirium-informed care has the potential to increase rates of assessment and delirium identification, thereby providing the foundation for reducing the consequences of delirium and improve patient-level outcomes. Further better controlled prospective work is needed to validate this intervention.

Incidence, risk factors, and cumulative risk of delirium among ICU patients: A case-control study

Objectives

Delirium is a common acute cognitive impairment syndrome among intensive care unit (ICU) patients. This study was aimed to investigate the incidence, risk factors, and cumulative risk of delirium among ICU patients.

Methods

A case-control study including clinical records of 452 patients were retrospectively analyzed. Delirium was assessed using the Confusion Assessment Method for the ICU and Richmond Agitation–Sedation Scale.

Results

We found that 163 out of the 452 patients (36.1%) had delirium. Multivariate analysis showed that use of sedatives, length of ICU hospitalization, and physical restraint were independent risk factors for delirium. The additive effect of all three factors resulted to an odds ratio of 30.950.

Conclusion

The incidence of delirium remained high. Thus, nurses shall strengthen the monitoring of delirium, regularly access the patient's level of calmness, and limit the use of physical restraint.

Delirium Incidence and Functional Outcomes After Transcatheter and Surgical Aortic Valve Replacement

BACKGROUND

Transcatheter aortic valve replacement (TAVR) may be associated with less delirium and allow faster recovery than surgical aortic valve replacement (SAVR).

OBJECTIVE

To examine the association of delirium and its severity with clinical and functional outcomes after SAVR and TAVR.

DESIGN

Prospective cohort study.

SETTING

An academic medical center.

PARTICIPANTS

A total of 187 patients, aged 70 years and older, undergoing SAVR (N = 77) and TAVR (N = 110) in 2014 to 2016.

MEASUREMENTS

Delirium was assessed daily using the Confusion Assessment Method (CAM), with severity measured by the CAM-Severity (CAM-S) score (range = 0-19). Outcomes were prolonged hospitalization (9 days or more); institutional discharge; and functional status, measured by ability to perform 22 daily activities and physical tasks over 12 months.

RESULTS

SAVR patients had a higher incidence of delirium than TAVR patients (50.7% vs 25.5%; P < .001), despite younger mean age (77.9 vs 83.7 years) and higher baseline Mini-Mental State Examination score (26.9 vs 24.7). SAVR patients with delirium had a shorter duration (2.2 vs 3.4 days; P = .04) with a lower mean CAM-S score (4.5 vs 5.7; P = .01) than TAVR patients with delirium. The risk of prolonged hospitalization in no, mild, and severe delirium was 18.4%, 30.8%, and 61.5% after SAVR (P for trend = .009) and 26.8%, 38.5%, and 73.3% after TAVR (P for trend = .001), respectively. The risk of institutional discharge was 42.1%, 58.3%, and 84.6% after SAVR (P for trend = .01) and 32.5%, 69.2%, and 80.0% after TAVR (P for trend <.001), respectively. Severe delirium was associated with delayed functional recovery after SAVR and persistent functional impairment after TAVR at 12 months.

CONCLUSION

Less invasive TAVR was associated with lower incidence of delirium than SAVR. Once delirium developed, TAVR patients had more severe delirium and worse functional status trajectory than SAVR patients did.

REGISTRATION

NCT01845207.

Meta-analysis of Prevalence and Risk Factors for Delirium After Transcatheter Aortic Valve Implantation

Delirium is a severe and common complication following transcatheter aortic valve implantation (TAVI). We sought to identify the prevalence and risk factors associated with the development of postprocedural delirium in patients aged over 60 years who underwent elective TAVI for aortic stenosis. Overall, 1,051 articles were searched, from which 9 studies were included. The prevalence of delirium following TAVI was higher in studies that assessed delirium for a minimum of 3 consecutive days (24.9%) compared with the studies that did not (2%). There were large effect sizes (d > 0.8) for 3 risk factors: acute kidney injury (odds ratio [OR] 5, p < 0.001), transapical approach (OR 4, p < 0.001) and carotid artery disease (OR 4, p < 0.001), whilst small effect sizes were found for a history of atrial fibrillation, prior stroke/transient ischemic attack, peripheral artery disease, hypertension, and prior cognitive impairment. In conclusion, 23% of patients 60 years and over who underwent TAVI experience delirium, a preventative cause of cognitive impairment and dementia. Recognition of risk factors for delirium after TAVI, such as a history of carotid artery disease, development of acute kidney injury, or use of a transapical approach, provides an opportunity to implement proven delirium preventative measures.

Indwelling urinary catheters, aortic valve treatment and delirium: a prospective cohort study

OBJECTIVES

To determine whether an association exists between delirium and length of time indwelling urine catheters (IUC) are used in octogenarian patients treated with surgical aortic valve treatment (SAVR) or transcatheter aortic valve implantation (TAVI).

DESIGN

Prospective cohort study.

SETTING

Tertiary university hospital covering the western region of Norway.

PARTICIPANTS

Octogenarian patients undergoing elective SAVR or TAVI and willing to participate in the study were eligible. Patients unable to speak Norwegian were excluded. Between 2011 and 2013, 143 consecutive patients were included, and data from 136 of them are presented.

PRIMARY OUTCOME

Delirium.

RESULTS

Logistic regression analysis shows that lower cognitive function was positively associated with delirium (OR 0.86, CI 0.74 to 0.99, p=0.047). Besides, the interaction term in the model shows that IUC use and delirium differed between SAVR and TAVI patients (p=0.04). The difference corresponded to a weaker association between hours of IUC use and delirium for SAVR (OR 1.01, CI: 0.99 to 1.03, p=0.54) compared with that for TAVI (OR 1.04, CI: 1.01 to 1.08, p=0.004).

CONCLUSIONS

The association between IUC use and delirium is stronger for octogenarian patients treated with TAVI than for patients who received SAVR. Our results revealed a previously unknown association between the number of hours an IUC is used and postoperative delirium in octogenarian patients treated with TAVI.

Postoperative Delirium in Individuals Undergoing Transcatheter Aortic Valve Replacement: A Systematic Review and Meta-Analysis

OBJECTIVES

To evaluate the incidence of in-hospital postoperative delirium (IHPOD) after transcatheter aortic valve replacement (TAVR).

DESIGN

Systematic review and meta-analysis.

SETTING

Elective procedures PARTICIPANTS: Individuals undergoing TAVR.

MEASUREMENTS

A literature search was conducted in PubMed, Embase, BioMedCentral, Google Scholar, and the Cochrane Central Register of Controlled Trials (up to December 2017). All observational studies reporting the incidence of IHPOD after TAVR (sample size > 25) were included in our meta-analysis. The reported incidence rates were weighted to obtain a pooled estimate rate with 95% confidence interval (CI).

RESULTS

Of 96 potentially relevant articles, 31 with a total of 32,389 individuals who underwent TAVR were included in the meta-analysis. The crude incidence of IHPOD after TAVR ranged from 0% to 44.6% in included studies, with a pooled estimate rate of 8.1% (95% CI=6.7-9.4%); heterogeneity was high (Q = 449; I = 93%; p_{heterogeneity}  < .001). The pooled estimate rate of IHPOD was 7.2% (95% CI=5.4-9.1%) after transfemoral (TF) TAVR and 21.4% (95% CI=10.3-32.5%) after non-TF TAVR.

CONCLUSION

Delirium occurs frequently after TAVR and is more common after non-TF than TF procedures. Recommendations are made with the aim of standardizing future research to reduce heterogeneity between studies on this important healthcare problem. J Am Geriatr Soc 66:2417-2424, 2018.