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1.
Geriatr Nurs ; 53: 12-18, 2023.
Article in English | MEDLINE | ID: mdl-37399613

ABSTRACT

Unplanned hospitalizations from nursing homes (NHs) may be considered potentially avoidable and can result in adverse resident outcomes. There is little information about the relationship between a clinical assessment conducted by a physician or geriatric nurse expert before hospitalization and an ensuing rating of avoidability. This study aimed to describe characteristics of unplanned hospitalizations (admitted residents with at least one night stay, emergency department visits were excluded) and to examine this relationship. We conducted a cohort study in 11 Swiss NHs and retrospectively evaluated data from the root cause analysis of 230 unplanned hospitalizations. A telephone assessment by a physician (p=.043) and the need for further medical clarification and treatment (p=<0.001) were the principal factors related to ratings of avoidability. Geriatric nurse experts can support NH teams in acute situations and assess residents while adjudicating unplanned hospitalizations. Constant support for nurses expanding their clinical role is still warranted.


Subject(s)
Hospitals , Nursing Homes , Humans , Aged , Cohort Studies , Retrospective Studies , Switzerland , Hospitalization , Emergency Service, Hospital
2.
J Cardiovasc Pharmacol ; 81(1): 35-44, 2023 01 01.
Article in English | MEDLINE | ID: mdl-36027598

ABSTRACT

ABSTRACT: Lipid-modifying agents steadily lower low-density lipoprotein cholesterol (LDL-C) levels with the aim of reducing mortality. A systematic review and meta-analysis were conducted to determine whether all-cause or cardiovascular (CV) mortality effect size for lipid-lowering therapy varied according to the magnitude of LDL-C reduction. Electronic databases were searched, including PubMed and ClinicalTrials.gov , from inception to December 31, 2019. Eligible studies included randomized controlled trials that compared lipid-modifying agents (statins, ezetimibe, and PCSK-9 inhibitors) versus placebo, standard or usual care or intensive versus less-intensive LDL-C-lowering therapy in adults, with or without known history of CV disease with a follow-up of at least 52 weeks. All-cause and CV mortality as primary end points, myocardial infarction, stroke, and non-CV death as secondary end points. Absolute risk differences [ARD (ARDs) expressed as incident events per 1000 person-years], number needed to treat (NNT), and rate ratios (RR) were assessed. Sixty randomized controlled trials totaling 323,950 participants were included. Compared with placebo, usual care or less-intensive therapy, active or more potent lipid-lowering therapy reduced the risk of all-cause death [ARD -1.33 (-1.89 to -0.76); NNT 754 (529-1309); RR 0.92 (0.89-0.96)]. Intensive LDL-C percent lowering was not associated with further reductions in all-cause mortality [ARD -0.27 (-1.24 to 0.71); RR 1.00 (0.94-1.06)]. Intensive LDL-C percent lowering did not further reduce CV mortality [ARD -0.28 (-0.83 to 0.38); RR 1.02 (0.94-1.09)]. Our findings indicate that risk reduction varies across subgroups and that overall NNTs are high. Identifying patient subgroups who benefit the most from LDL-C levels reduction is clinically relevant and necessary.


Subject(s)
Anticholesteremic Agents , Cardiovascular Diseases , Hydroxymethylglutaryl-CoA Reductase Inhibitors , Myocardial Infarction , Humans , Anticholesteremic Agents/adverse effects , Cholesterol, LDL , Hydroxymethylglutaryl-CoA Reductase Inhibitors/therapeutic use , Ezetimibe/therapeutic use , Cardiovascular Diseases/diagnosis , Cardiovascular Diseases/prevention & control , Cardiovascular Diseases/drug therapy , Myocardial Infarction/drug therapy , Randomized Controlled Trials as Topic
3.
BMC Geriatr ; 22(1): 496, 2022 06 09.
Article in English | MEDLINE | ID: mdl-35681157

ABSTRACT

BACKGROUND: Health economic evaluations of the implementation of evidence-based interventions (EBIs) into practice provide vital information but are rarely conducted. We evaluated the health economic impact associated with implementation and intervention of the INTERCARE model-an EBI to reduce hospitalisations of nursing home (NH) residents-compared to usual NH care. METHODS: The INTERCARE model was conducted in 11 NHs in Switzerland. It was implemented as a hybrid type 2 effectiveness-implementation study with a multi-centre non-randomised stepped-wedge design. To isolate the implementation strategies' costs, time and other resources from the NHs' perspective, we applied time-driven activity-based costing. To define its intervention costs, time and other resources, we considered intervention-relevant expenditures, particularly the work of the INTERCARE nurse-a core INTERCARE element. Further, the costs and revenues from the hotel and nursing services were analysed to calculate the NHs' losses and savings per resident hospitalisation. Finally, alongside our cost-effectiveness analysis (CEA), a sensitivity analysis focused on the intervention's effectiveness-i.e., regarding reduction of the hospitalisation rate-relative to the INTERCARE costs. All economic variables and CEA were assessed from the NHs' perspective. RESULTS: Implementation strategy costs and time consumption per bed averaged 685CHF and 9.35 h respectively, with possibilities to adjust material and human resources to each NH's needs. Average yearly intervention costs for the INTERCARE nurse salary per bed were 939CHF with an average of 1.4 INTERCARE nurses per 100 beds and an average employment rate of 76% of full-time equivalent per nurse. Resident hospitalisation represented a total average loss of 52% of NH revenues, but negligible cost savings. The incremental cost-effectiveness ratio of the INTERCARE model compared to usual care was 22'595CHF per avoided hospitalisation. As expected, the most influential sensitivity analysis variable regarding the CEA was the pre- to post-INTERCARE change in hospitalisation rate. CONCLUSIONS: As initial health-economic evidence, these results indicate that the INTERCARE model was more costly but also more effective compared to usual care in participating Swiss German NHs. Further implementation and evaluation of this model in randomised controlled studies are planned to build stronger evidential support for its clinical and economic effectiveness. TRIAL REGISTRATION: clinicaltrials.gov ( NCT03590470 ).


Subject(s)
Nurse's Role , Nursing Homes , Cost-Benefit Analysis , Hospitalization , Humans , Skilled Nursing Facilities
5.
BMC Geriatr ; 22(1): 196, 2022 03 12.
Article in English | MEDLINE | ID: mdl-35279088

ABSTRACT

BACKGROUND | OBJECTIVE: To evaluate the implementation of three intervention elements to reduce hospitalizations in nursing home residents. DESIGN: Convergent mixed-method design within a hybrid type-2 effectiveness-implementation study. SETTING: Eleven nursing homes in the German-speaking region of Switzerland. PARTICIPANTS: Quantitative data were collected from 573 care workers; qualitative data were collected from 108 care workers and the leadership from 11 nursing homes. INTERVENTION: Three intervention elements targeting care workers were implemented to reduce unplanned hospitalizations: (1) the STOP&WATCH instrument for early recognition of changes in resident condition; (2) the ISBAR instrument for structured communication; and (3) specially-trained INTERCARE nurses providing on-site geriatric support. Multifaceted implementation strategies focusing both on the overall nursing home organization and on the care workers were used. METHODS: The quantitative part comprised surveys of care workers six- and twelve-months post-intervention. The intervention's acceptability, feasibility and uptake were assessed using validated and self-developed scales. Qualitative data were collected in 22 focus groups with care workers, then analyzed using thematic analysis methodology. Data on implementation processes were collected during implementation meetings with nursing home leadership and were analyzed via content analysis. Findings were integrated using a complementary approach. RESULTS: The ISBAR instrument and the INTERCARE nurse role were considered acceptable, feasible, and taken up by > 70% of care workers. The STOP&WATCH instrument showed the lowest acceptance (mean: 68%), ranging from 24 to 100% across eleven nursing homes. A combination of factors, including the amount of information received, the amount of support provided in daily practice, the users' perceived ease of using the intervention and its adaptations, and the intervention's usefulness, appeared to influence the implementation's success. Two exemplary nursing homes illustrated context-specific implementation processes that serve as either barriers or facilitators to implementation. CONCLUSIONS: Our findings suggest that, alongside the provision of information shortly before intervention start, constant daily support is crucial for implementation success. Ideally, this support is provided by designated and trained individuals who oversee implementation at the organizational and unit levels. Leaders who seek to implement interventions in nursing homes should consider their complexity and their consequences for workflow to optimize implementation processes accordingly. TRIAL REGISTRATION: This study was registered at clinicaltrials.gov ( NCT03590470 ) on the 18/06/2018.


Subject(s)
Health Personnel , Nursing Homes , Aged , Hospitalization , Humans , Research Design , Surveys and Questionnaires
6.
J Am Geriatr Soc ; 70(5): 1546-1557, 2022 05.
Article in English | MEDLINE | ID: mdl-35122238

ABSTRACT

BACKGROUND: Unplanned nursing home (NH) transfers are burdensome for residents and costly for health systems. Innovative nurse-led models of care focusing on improving in-house geriatric expertise are needed to decrease unplanned transfers. The aim was to test the clinical effectiveness of a comprehensive, contextually adapted geriatric nurse-led model of care (INTERCARE) in reducing unplanned transfers from NHs to hospitals. METHODS: A multicenter nonrandomized stepped-wedge design within a hybrid type-2 effectiveness-implementation study was implemented in 11 NHs in German-speaking Switzerland. The first NH enrolled in June 2018 and the last in November 2019. The study lasted 18 months, with a baseline period of 3 months for each NH. Inclusion criteria were 60 or more long-term care beds and 0.8 or more hospitalizations per 1'000 resident care days. Nine hundred and forty two long-term NH residents were included between June 2018 and January 2020 with informed consent. Short-term residents were excluded. The primary outcome was unplanned hospitalizations. A fully anonymized dataset of overall transfers of all NH residents served as validation. Analysis was performed with segmented mixed regression modeling. RESULTS: Three hundred and three unplanned and 64 planned hospitalizations occurred. During the baseline period, unplanned transfers increased over time (ß1  = 0.52), after which the trend significantly changed by a similar but opposite amount (ß2  = -0.52; p = 0.0001), resulting in a flattening of the average transfer rate throughout the postimplementation period (ß1  + ß2  ≈ 0). Controlling for age, gender, and cognitive performance did not affect these trends. The validation set showed a similar flattening trend. CONCLUSION: A complex intervention with six evidence-based components demonstrated effectiveness in significantly reducing unplanned transfers of NH residents to hospitals. INTERCARE's success was driven by registered nurses in expanded roles and the use of tools for clinical decision-making.


Subject(s)
Nurse's Role , Patient Transfer , Aged , Hospitalization , Hospitals , Humans , Nursing Homes
8.
Gerontologist ; 61(7): 1041-1052, 2021 09 13.
Article in English | MEDLINE | ID: mdl-33624766

ABSTRACT

BACKGROUND AND OBJECTIVES: As new models of care aiming to reduce hospitalizations from nursing homes emerge, their implementers must consider residents' and relatives' needs and experiences with acute changes in the residents' health situations. As part of the larger INTERCARE implementation study, we explored these persons' experiences of acute situations in Swiss nursing homes. RESEARCH DESIGN AND METHODS: 3 focus groups were conducted with residents and their relatives and analyzed via reflexive thematic analysis. RESULTS: The first theme, the orchestra plays its standards, describes experiences of structured everyday care in nursing homes, which functions well despite limited professional and competency resources. The second theme, the orchestra reaches its limits, illustrates accounts of acute situations in which resources were insufficient to meet residents' needs. Interestingly, participants' perceptions of acute situations went well beyond our own professional view, that is, changes in health situations, and included situations best summarized as "changes that might have negative consequences for residents if not handled adequately by care workers." Within the third theme, the audience compensates for the orchestra's limitations, participants' strategies to cope with resource limitations in acute situations are summarized. DISCUSSION AND IMPLICATIONS: Our findings suggest differences between care providers' and participants' perspectives regarding acute situations and care priority setting. Alongside efforts to promote staff awareness of and responsiveness to acute situations, care staff must commit to learning and meeting individual residents' and relatives' needs. Implications for the development and implementation of a new nurse-led model of care are discussed.


Subject(s)
Health Personnel , Nursing Homes , Adaptation, Psychological , Focus Groups , Humans , Qualitative Research
12.
Int J Public Health ; 64(9): 1273-1281, 2019 Dec.
Article in English | MEDLINE | ID: mdl-31482196

ABSTRACT

OBJECTIVES: Reducing nursing home hospitalizations for ambulatory care sensitive conditions (ACSC) has been identified as an opportunity to improve patient well-being and reduce costs. The aim of this study was to identify number of hospitalizations for ACSCs for nursing home residents in a Swiss national sample, examine demographic characteristics of nursing home hospitalizations due to ACSCs, and calculate hospital expenses from these hospitalizations. METHODS: Using merged hospital administrative data with payment data based on diagnosis-related groups (DRGs) for the year 2013, we descriptively examined nursing home residents who were 65 years of age or older and were admitted to an acute care hospital. RESULTS: Approximately 42% of all nursing home admissions were due to ACSCs. Payments to Swiss hospitals for ACSCs can be estimated at between 89 and 105 million Swiss francs in 2013. CONCLUSIONS: A sizable share of hospitalizations for nursing home residents is for ACSCs, and the associated costs are substantial. Programs and policies designed to reduce these potentially avoidable hospitalizations from the nursing home setting could lead to an increased patient well-being and lower costs.


Subject(s)
Ambulatory Care/economics , Ambulatory Care/statistics & numerical data , Cost Savings/statistics & numerical data , Hospitalization/economics , Hospitalization/statistics & numerical data , Nursing Homes/economics , Nursing Homes/statistics & numerical data , Aged , Aged, 80 and over , Costs and Cost Analysis , Female , Humans , Male , Switzerland
13.
J Am Geriatr Soc ; 67(10): 2145-2150, 2019 10.
Article in English | MEDLINE | ID: mdl-31317544

ABSTRACT

OBJECTIVES: Nursing home (NH) residents with complex care needs ask for attentive monitoring of changes and appropriate in-house decision making. However, access to geriatric expertise is often limited with a lack of geriatricians, general practitioners, and/or nurses with advanced clinical skills, leading to potentially avoidable hospitalizations. This situation calls for the development, implementation, and evaluation of innovative, contextually adapted nurse-led care models that support NHs in improving their quality of care and reducing hospitalizations by investing in effective clinical leadership, geriatric expertise, and care coordination. DESIGN: An effectiveness-implementation hybrid type 2 design to assess clinical outcomes of a nurse-led care model and a mixed-method approach to evaluate implementation outcomes will be applied. The model development, tailoring, and implementation are based on the Consolidated Framework for Implementation Research (CFIR). SETTING: NHs in the German-speaking region of Switzerland. PARTICIPANTS: Eleven NHs were recruited. The sample size was estimated assuming an average of .8 unplanned hospitalizations/1000 resident days and a reduction of 25% in NHs with the nurse-led care model. INTERVENTION: The multilevel complex context-adapted intervention consists of six core elements (eg, specifically trained INTERCARE nurses or evidence-based tools like Identify, Situation, Background, Assessment and Recommendation [ISBAR]). Multilevel implementation strategies include leadership and INTERCARE nurse training and support. MEASUREMENTS: The primary outcomes are unplanned hospitalizations/1000 care days. Secondary outcomes include unplanned emergency department visits, quality indicators (eg, physical restraint use), and costs. Implementation outcomes included, for example, fidelity to the model's core elements. CONCLUSION: The INTERCARE study will provide evidence about the effectiveness of a nurse-led care model in the real-world setting and accompanying implementation strategies. J Am Geriatr Soc 67:2145-2150, 2019.


Subject(s)
Clinical Competence/standards , Homes for the Aged/standards , Nursing Homes/standards , Practice Patterns, Nurses'/organization & administration , Aged , Cross-Over Studies , Geriatrics/education , Humans , Leadership , Models, Nursing , Non-Randomized Controlled Trials as Topic , Quality of Health Care , Switzerland
15.
BMC Health Serv Res ; 19(1): 356, 2019 Jun 06.
Article in English | MEDLINE | ID: mdl-31170976

ABSTRACT

BACKGROUND: High performance work systems (HPWSs) are successful work systems in the context of safety climate and patient safety. The 10-item HPWS questionnaire is a validated instrument developed to assess existing HPWS structures in hospitals. The objectives of this cross-sectional study were to translate the English HPWS questionnaire into German (HPWS-G), to rate its content validity, and to examine its psychometric properties. METHODS: Content validity was examined by a panel of 12 physicians and nurses, and I-CVI and S-CVI calculated. For internal consistency, Cronbach's α and item-scale correlations were determined. Construct validity was measured via confirmatory factor analysis. A convenience sample of 782 nurses and physicians in a University hospital setting in Switzerland's German-speaking region was surveyed. Four inclusion criteria were applied: working in intensive care, emergency department or operating room; having daily patient contact; having worked in the current clinical area for more than three months; and more than 40% employment. RESULTS: A total of 281 questionnaires were completed (response rate: 35.9%). Overall, the 10-item HPWS-G questionnaire showed good content validity (I-CVI = .83-1; S-CVI = .86) and internal consistency (Cronbach's α = .853). HPWS-G scores correlated significantly with safety climate (rs = .657, p < .01) and teamwork climate (rs = .615, p < .01). The proposed 1-factor model was accepted considering results of applied minimum rank factor analysis; a confirmatory factor analysis indicated an acceptable to good model fit (GFI = .968; CFI = .902; RMSEA = .043). CONCLUSIONS: The HPWS-G showed good psychometric properties. In clinical practice it can be used to assess HPWS practices and for intra- and inter-hospital benchmarking. Some minor adaptions to the wording could be made as well as reassessing the psychometric properties at other clinical sites.


Subject(s)
Hospitals, University , Patient Safety , Psychometrics/methods , Psychometrics/standards , Surveys and Questionnaires/standards , Translations , Cross-Sectional Studies , Germany , Humans , Reproducibility of Results , Switzerland
16.
Can J Cardiol ; 35(1): 27-34, 2019 01.
Article in English | MEDLINE | ID: mdl-30595180

ABSTRACT

BACKGROUND: We hypothesized that preoperative electromechanical dyssynchrony amenable to cardiac resynchronization therapy (CRT) and QRS narrowing immediately after CRT are both correlated and have a cumulative impact on response and outcome after CRT. METHODS: A total of 233 CRT candidates (heart failure New York Heart Association classes II-IV, ejection fraction < 35%, QRS ≥ 120 milliseconds, 44% women, 71 ± 11 years old) were prospectively included. Preoperative electromechanical dyssynchrony amenable to CRT was assessed by septal deformation patterns using speckle tracking echocardiography. QRS narrowing was calculated from 12-lead electrocardiograms before and immediately after CRT implantation. The primary endpoint was overall mortality during long-term follow-up. The NTC clinical trial number is NCT02986633. RESULTS: Eighty-seven percent of patients with preoperative electromechanical dyssynchrony experienced QRS narrowing after CRT (118/136), whereas 69% of patients without preoperative electromechanical dyssynchrony (67/97) experienced QRS narrowing after CRT (P < 0.001). By Cox multivariate analysis, both preoperative electromechanical dyssynchrony and lack of postoperative QRS narrowing were independently associated with an increased risk of mortality during follow-up (adjusted hazards ratio [HR] 2.24, 95% confidence interval [CI] 1.43-3.50 and HR 1.90, 95% CI 1.06-3.38, respectively). Compared with patients with preoperative electromechanical dyssynchrony, patients without both electromechanical dyssynchrony and postoperative QRS narrowing experienced a considerable increased risk of mortality during follow-up (adjusted HR 3.70, 95% CI 1.96-6.97). CONCLUSIONS: Lack of postoperative QRS narrowing after CRT is associated with preoperative electromechanical dyssynchrony. Both preoperative electromechanical dyssynchrony and postoperative QRS narrowing have a favourable cumulative impact on outcome after CRT.


Subject(s)
Cardiac Resynchronization Therapy/methods , Electrocardiography , Heart Failure/therapy , Heart Ventricles/physiopathology , Stroke Volume/physiology , Aged , Echocardiography, Doppler , Female , Follow-Up Studies , Heart Failure/diagnosis , Heart Failure/physiopathology , Heart Ventricles/diagnostic imaging , Humans , Male , Retrospective Studies
17.
Acta Cardiol ; 74(2): 93-98, 2019 Apr.
Article in English | MEDLINE | ID: mdl-29730968

ABSTRACT

Ticagrelor is a reversible P2Y12 receptor antagonist that is more potent than clopidogrel. When used in combination with aspirin, it reduces cardiovascular events in patients with acute coronary syndrome. However, unbiased review of 5 randomised controlled trials indicates that although statistically significant, the clinical superiority of ticagrelor over clopidogrel is modest. Thus, identification of patients who benefit the most from ticagrelor is a priority. Besides bleeding issues, ticagrelor can frequently cause bouts of dyspnoea, which requires ticagrelor replacement by another P2Y12 receptor antagonist, with a loading dose.


Subject(s)
Acute Coronary Syndrome/drug therapy , Drug Costs , Drug-Related Side Effects and Adverse Reactions/epidemiology , Ticagrelor/pharmacology , Global Health , Humans , Incidence , Purinergic P2Y Receptor Antagonists/economics , Purinergic P2Y Receptor Antagonists/pharmacology , Ticagrelor/economics
19.
Arch Cardiovasc Dis ; 111(5): 320-331, 2018 May.
Article in English | MEDLINE | ID: mdl-29102366

ABSTRACT

BACKGROUND: The prognostic value of secondary mitral regurgitation (MR) at baseline versus immediately after and several months after cardiac resynchronization therapy (CRT), beyond left ventricular (LV) reverse remodelling, has yet to be investigated. AIM: To evaluate the clinical significance of secondary MR before and at two timepoints after CRT in a large cohort of consecutive patients with heart failure (HF) and reduced LV ejection fraction. METHODS: A total of 198 patients were recruited prospectively into a registry, and underwent echocardiography at baseline and immediately after CRT (on the day of hospital discharge). Echocardiography was also performed 9 months after CRT in 172 patients. The impact of significant secondary MR (≥moderate) on all-cause death, cardiovascular death and hospitalization for HF was studied at each stage. RESULTS: The frequency of significant secondary MR decreased from 23% (n=45) to 8% (n=16) immediately after CRT. Among the 172 patients who underwent echocardiography 9 months after CRT, 17 (10%) had significant secondary MR. During a median follow-up of 48 months, 49 patients died and 36 were hospitalized for HF. Patients with significant secondary MR immediately after or 9 months after CRT had an increased risk of all-cause death, cardiovascular death and hospitalization for HF during follow-up (P<0.05 for all endpoints). After adjustment for LV reverse remodelling, significant secondary MR 9 months after CRT remained associated with an increased risk of all-cause death (adjusted hazard ratio [HR] 3.77; P=0.014), cardiovascular death (adjusted HR 5.36; P=0.037), and hospitalization for HF (adjusted HR 7.33; P=0.001). CONCLUSIONS: Significant secondary MR despite CRT provides important prognostic information beyond LV reverse remodelling. Further studies are needed to evaluate the potential role of new percutaneous procedures for mitral valve repair in improving outcome in these very high-risk patients.


Subject(s)
Cardiac Resynchronization Therapy , Heart Failure/therapy , Mitral Valve Insufficiency/etiology , Ventricular Function, Left , Ventricular Remodeling , Aged , Aged, 80 and over , Cardiac Resynchronization Therapy/adverse effects , Cardiac Resynchronization Therapy/mortality , Echocardiography, Doppler , Female , Heart Failure/complications , Heart Failure/mortality , Heart Failure/physiopathology , Humans , Kaplan-Meier Estimate , Male , Middle Aged , Mitral Valve Insufficiency/mortality , Mitral Valve Insufficiency/physiopathology , Patient Readmission , Proportional Hazards Models , Prospective Studies , Registries , Risk Factors , Time Factors , Treatment Outcome
20.
Echocardiography ; 34(12): 1872-1881, 2017 12.
Article in English | MEDLINE | ID: mdl-29114924

ABSTRACT

AIMS: Patients with significant (3+/4+) aortic regurgitation (AR) require careful monitoring or valve surgery. We sought to evaluate the diagnostic performance of aortic and pulmonary flow comparison in identifying patients with significant AR, by echocardiography. METHOD: Two hundred forty-six patients with more than trivial AR were prospectively enrolled from three centers. Aortic regurgitation (AR) severity was assessed by an expert using the currently recommended integrative approach. Aortic and pulmonary flows were independently assessed by another investigator to calculate the regurgitant fraction (RF), the aortic to pulmonary flow ratio (Qao/Qp) and the aortic to pulmonary velocity-time integral (VTIao/VTIp) ratio. The control group consisted of 195 patients without AR. RESULTS: A significant correlation was observed between AR grading and RF (r = .82, P < .0001) and Qao/Qp (r = .81, P < .0001), but the correlation was modest for VTIao/VTIp ratio (r = .63; P < .0001). The accuracy of RF and Qao/Qp ratio to identify patients with significant AR was excellent (0.96 and 0.95, respectively), but was significantly lower for VTIao/VTIp ratio at 0.82. A RF > 40% indicated grade 3 or 4 AR with a sensitivity of 83% and a specificity of 93%. A Qao/Qp ratio > 1.6 indicated grade 3 or 4 AR with a sensitivity of 88% and a specificity of 89%. The VTIao/VTIp ratio was not helpful in identifying patients with significant AR, as a wide overlap was found between 1+/2+ and 3+/4+ patients. CONCLUSION: Regurgitant fraction (RF) and Qao/Qp are helpful in identifying significant AR. The assessment of Doppler aortic/pulmonary flow should be incorporated in the comprehensive evaluation of AR.


Subject(s)
Aorta/physiopathology , Aortic Valve Insufficiency/physiopathology , Echocardiography, Doppler/methods , Lung/blood supply , Lung/physiopathology , Aorta/diagnostic imaging , Aortic Valve Insufficiency/diagnostic imaging , Blood Flow Velocity , Evaluation Studies as Topic , Female , Humans , Lung/diagnostic imaging , Male , Middle Aged , Prospective Studies , Sensitivity and Specificity , Severity of Illness Index
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