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Smereka Y, Ezekowitz JA. HFpEF and sex: understanding the role of sex differences. Can J Physiol Pharmacol 2024; 102:465-475. [PMID: 38447124 DOI: 10.1139/cjpp-2023-0403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Heart failure is a complex clinical syndrome with many etiological factors and complex pathophysiology affecting millions worldwide. Males and females can have distinct clinical presentation and prognosis, and there is an emerging understanding of the factors that highlight the similarities and differences to synthesize and present available data for sex-specific differences in heart failure with preserved ejection fraction (HFpEF). While the majority of data demonstrate more similarities than differences between females and males in terms of heart failure, there are key differences. Data showed that females have a higher risk of developing HFpEF, but a lower risk of mortality and hospitalization. This can be conditioned by different profiles of comorbidities, postmenopausal changes in sex hormone levels, higher levels of inflammation and chronic microvascular dysfunction in females. These factors, combined with different left ventricular dimensions and function, which are more pronounced with age, lead to a higher prevalence of LV diastolic dysfunction at rest and exercise. As a result, females have lower exercise capacity and quality of life when compared to males. Females also have different activities of systems responsible for drug transformation, leading to different efficacy of drugs as well as higher risk of adverse drug reactions. These data prove the necessity for creating sex-specific risk stratification scales and treatment plans.
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Affiliation(s)
- Yuliia Smereka
- Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - Justin A Ezekowitz
- Department of Medicine, University of Alberta, Edmonton, AB, Canada
- Canadian VIGOUR Centre, Edmonton, AB, Canada
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Abdul-Samad K, Ma S, Austin DE, Chong A, Wang CX, Wang X, Austin PC, Ross HJ, Wang B, Lee DS. Comparison of Machine Learning and Conventional Statistical Modeling for Predicting Readmission Following Acute Heart Failure Hospitalization. Am Heart J 2024:S0002-8703(24)00183-2. [PMID: 39094840 DOI: 10.1016/j.ahj.2024.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 07/24/2024] [Accepted: 07/27/2024] [Indexed: 08/04/2024]
Abstract
INTRODUCTION Developing accurate models for predicting the risk of 30-day readmission is a major healthcare interest. Evidence suggests that models developed using machine learning (ML) may have better discrimination than conventional statistical models (CSM), but the calibration of such models is unclear. OBJECTIVES To compare models developed using ML with those developed using CSM to predict 30-day readmission for cardiovascular and non-cardiovascular causes in HF patients. METHODS We retrospectively enrolled 10,919 patients with HF (> 18 years) discharged alive from a hospital or emergency department (2004-2007) in Ontario, Canada. The study sample was randomly divided into training and validation sets in a 2:1 ratio. CSMs to predict 30-day readmission were developed using Fine-Gray subdistribution hazards regression (treating death as a competing risk), and the ML algorithm employed random survival forests for competing risks (RSF-CR). Models were evaluated in the validation set using both discrimination and calibration metrics. RESULTS In the validation sample of 3602 patients, RSF-CR (c-statistic=0.620) showed similar discrimination to the Fine-Gray competing risk model (c-statistic=0.621) for 30-day cardiovascular readmission. In contrast, for 30-day non-cardiovascular readmission, the Fine-Gray model (c-statistic=0.641) slightly outperformed the RSF-CR model (c-statistic=0.632). For both outcomes, The Fine-Gray model displayed better calibration than RSF-CR using calibration plots of observed vs. predicted risks across the deciles of predicted risk. CONCLUSIONS Fine-Gray models had similar discrimination but superior calibration to the RSF-CR model, highlighting the importance of reporting calibration metrics for ML-based prediction models. The discrimination was modest in all readmission prediction models regardless of the methods used.
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Affiliation(s)
- Karem Abdul-Samad
- Ted Rogers Centre for Heart Research, Toronto, Canada; University of Toronto, Toronto, Canada; ICES (formerly Institute for Clinical Evaluative Sciences), Toronto, Canada
| | - Shihao Ma
- University of Toronto, Toronto, Canada; Peter Munk Cardiac Centre of University Health Network, Toronto, Canada
| | | | - Alice Chong
- ICES (formerly Institute for Clinical Evaluative Sciences), Toronto, Canada
| | - Chloe X Wang
- University of Toronto, Toronto, Canada; Peter Munk Cardiac Centre of University Health Network, Toronto, Canada
| | - Xuesong Wang
- ICES (formerly Institute for Clinical Evaluative Sciences), Toronto, Canada
| | - Peter C Austin
- ICES (formerly Institute for Clinical Evaluative Sciences), Toronto, Canada
| | - Heather J Ross
- Ted Rogers Centre for Heart Research, Toronto, Canada; Peter Munk Cardiac Centre of University Health Network, Toronto, Canada
| | - Bo Wang
- University of Toronto, Toronto, Canada; Peter Munk Cardiac Centre of University Health Network, Toronto, Canada
| | - Douglas S Lee
- Ted Rogers Centre for Heart Research, Toronto, Canada; University of Toronto, Toronto, Canada; ICES (formerly Institute for Clinical Evaluative Sciences), Toronto, Canada; Peter Munk Cardiac Centre of University Health Network, Toronto, Canada.
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Hoagland A, Kipping S. Challenges in Promoting Health Equity and Reducing Disparities in Access Across New and Established Technologies. Can J Cardiol 2024; 40:1154-1167. [PMID: 38417572 DOI: 10.1016/j.cjca.2024.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 03/01/2024] Open
Abstract
Medical innovations and novel technologies stand to improve the return on high levels of health spending in developed countries, particularly in cardiovascular care. However, cardiac innovations also disrupt the landscape of accessing care, potentially creating disparities in who has access to novel and extant technologies. These disparities might disproportionately harm vulnerable groups, including those whose nonmedical conditions-including social determinants of health-inhibit timely access to diagnoses, referrals, and interventions. We first document the barriers to access novel and existing technologies in isolation, then proceed to document their interaction. Novel cardiac technologies might affect existing available services, and change the landscape of care for vulnerable patient groups who seek access to cardiology services. There is a clear need to identify and heed lessons learned from the dissemination of past innovations in the development, funding, and dissemination of future medical technologies to promote equitable access to cardiovascular care. We conclude by highlighting and synthesizing several policy implications from recent literature.
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Affiliation(s)
- Alex Hoagland
- Institute of Health Policy, Management, and Evaluation, University of Toronto, Ontario Shores Centre for Mental Health Sciences, Toronto, Ontario, Canada.
| | - Sarah Kipping
- Institute of Health Policy, Management, and Evaluation, University of Toronto, Ontario Shores Centre for Mental Health Sciences, Toronto, Ontario, Canada
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Houle J, Adams AM, Norris C, Sharma A, Pilote L. Social Determinants of Health, Adherence, and Outcomes in Heart Failure: The Role of Social Prescribing. Can J Cardiol 2024; 40:973-975. [PMID: 38215972 DOI: 10.1016/j.cjca.2023.12.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/08/2023] [Accepted: 12/27/2023] [Indexed: 01/14/2024] Open
Affiliation(s)
- Jonathan Houle
- Centre for Outcomes Research and Evaluation, Research Institute, McGill University Health Centre, Montréal, Québec, Canada; Department of Epidemiology and Biostatistics, McGill University, Montréal, Québec, Canada; Division of General Internal Medicine, McGill University Health Centre, Montréal, Québec, Canada
| | - Alayne M Adams
- Department of Family Medicine, Faculty of Medicine and Health Sciences, McGill University, Montréal, Québec, Canada
| | | | - Abhinav Sharma
- Centre for Outcomes Research and Evaluation, Research Institute, McGill University Health Centre, Montréal, Québec, Canada; Division of Cardiology, McGill University Health Centre, Montréal, Québec, Canada
| | - Louise Pilote
- Centre for Outcomes Research and Evaluation, Research Institute, McGill University Health Centre, Montréal, Québec, Canada; Department of Epidemiology and Biostatistics, McGill University, Montréal, Québec, Canada; Division of General Internal Medicine, McGill University Health Centre, Montréal, Québec, Canada.
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Mamataz T, Virani SA, McDonald M, Edgell H, Grace SL. Heart failure clinic inclusion and exclusion criteria: cross-sectional study of clinic's and referring provider's perspectives. BMJ Open 2024; 14:e076664. [PMID: 38485484 PMCID: PMC10941180 DOI: 10.1136/bmjopen-2023-076664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 02/28/2024] [Indexed: 03/17/2024] Open
Abstract
OBJECTIVES There are substantial variations in entry criteria for heart failure (HF) clinics, leading to variations in whom providers refer for these life-saving services. This study investigated actual versus ideal HF clinic inclusion or exclusion criteria and how that related to referring providers' perspectives of ideal criteria. DESIGN, SETTING AND PARTICIPANTS Two cross-sectional surveys were administered via research electronic data capture to clinic providers and referrers (eg, cardiologists, family physicians and nurse practitioners) across Canada. MEASURES Twenty-seven criteria selected based on the literature and HF guidelines were tested. Respondents were asked to list any additional criteria. The degree of agreement was assessed (eg, Kappa). RESULTS Responses were received from providers at 48 clinics (37.5% response rate). The most common actual inclusion criteria were newly diagnosed HF with reduced or preserved ejection fraction, New York Heart Association class IIIB/IV and recent hospitalisation (each endorsed by >74% of respondents). Exclusion criteria included congenital aetiology, intravenous inotropes, a lack of specialists, some non-cardiac comorbidities and logistical factors (eg, rurality and technology access). There was the greatest discordance between actual and ideal criteria for the following: inpatient at the same institution (κ=0.14), congenital heart disease, pulmonary hypertension or genetic cardiomyopathies (all κ=0.36). One-third (n=16) of clinics had changed criteria, often for non-clinical reasons. Seventy-three referring providers completed the survey. Criteria endorsed more by referrers than clinics included low blood pressure with a high heart rate, recurrent defibrillator shocks and intravenous inotropes-criteria also consistent with guidelines. CONCLUSIONS There is considerable agreement on the main clinic entry criteria, but given some discordance, two levels of clinics may be warranted. Publicising evidence-based criteria and applying them systematically at referral sources could support improved HF patient care journeys and outcomes.
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Affiliation(s)
- Taslima Mamataz
- Faculty of Health, York University, Keele Campus, Toronto, Ontario, Canada
| | - Sean A Virani
- Medicine, The University of British Columbia Faculty of Medicine, Vancouver, British Columbia, Canada
| | - Michael McDonald
- Peter Munk Cardiac Centre, University of Toronto, University Health Network, Toronto, Ontario, Canada
| | - Heather Edgell
- Faculty of Health, York University, Keele Campus, Toronto, Ontario, Canada
| | - Sherry L Grace
- Faculty of Health, York University, Keele Campus, Toronto, Ontario, Canada
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Khosravirad Z, Rostamzadeh M, Azizi S, Khodashenas M, Khodadoustan Shahraki B, Ghasemi F, ghorbanzadeh M. The Efficacy of Self-care Behaviors, Educational Interventions, and Follow-up Strategies on Hospital Readmission and Mortality Rates in Patients with Heart Failure. Galen Med J 2023; 12:1-7. [PMID: 38774856 PMCID: PMC11108665 DOI: 10.31661/gmj.v12i.3116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Indexed: 05/24/2024] Open
Abstract
Heart failure (HF), a worldwide epidemic with significant morbidity and mortality risks, is frequently secondary to cardiovascular disorders and probably is the common final way to survive patients. Almost 25% of hospitalized patients with acute HF are expected to be readmitted within 30 days post-discharge, and the rates of rehospitalization increase to almost one-third at 60 days and 60 percent within one year of discharge. Although care planning for patients with heart failure is complex, multidisciplinary, and resource-dependent, optimal self-care management along with appropriate educational intervention and follow-up strategy could be able to reduce readmissions, decline the duration of hospitalization, increase life expectancy, decrease the rates of mortality, and reduce costs of healthcare services for patients with HF. However, there are contradictions in previous reports about the efficacy of self-care, mainly due to patients' non-adherence to self-care behaviors. Therefore, the current study aimed to review the investigations on the effectiveness of self-care of HF patients in reducing hospital readmissions and increasing quality of life, and discuss novel approaches for predischarge educational interventions and postdischarge follow-up strategies.
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Affiliation(s)
| | - Mohammad Rostamzadeh
- Department of Cardiology, School of Medicine, Ardabil University of Medical
Sciences, Ardabil, Iran
| | - Shiva Azizi
- Department of Nursing, School of Nursing, North Khorasan University of Medical
Sciences, Bojnurd, Iran
| | | | | | - Farangis Ghasemi
- Department of Biology, Jahrom Branch, Islamic Azad University, Jahrom, Iran
| | - Maryam ghorbanzadeh
- Department of Nursing, School of Nursing, North Khorasan University of Medical
Sciences, Bojnurd, Iran
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Ezekowitz JA. People, Systems, and Results Matter in Heart Failure: Time for a Change. Can J Cardiol 2023; 39:1480-1482. [PMID: 37517475 DOI: 10.1016/j.cjca.2023.07.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/14/2023] [Accepted: 07/14/2023] [Indexed: 08/01/2023] Open
Affiliation(s)
- Justin A Ezekowitz
- Canadian VIGOUR Centre, University of Alberta, Edmonton, Alberta, Canada; Department of Medicine, University of Alberta, Edmonton, Alberta, Canada.
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Moghaddam N, Lindsay MP, Hawkins NM, Anderson K, Ducharme A, Lee DS, McKelvie R, Poon S, Desmarais O, Desbiens M, Virani S. Access to Heart Failure Services in Canada: Findings of the Heart and Stroke National Heart Failure Resources and Services Inventory. Can J Cardiol 2023; 39:1469-1479. [PMID: 37422257 DOI: 10.1016/j.cjca.2023.06.430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 07/10/2023] Open
Abstract
BACKGROUND The rising incidence of heart failure (HF) in Canada necessitates commensurate resources dedicated to its management. Several health system partners launched an HF Action Plan to understand the current state of HF care in Canada and address inequities in access and resources. METHODS A national Heart Failure Resources and Services Inventory (HF-RaSI) was conducted from 2020 to 2021 of all 629 acute care hospitals and 20 urgent care centres in Canada. The HF-RaSI consisted of 44 questions on available resources, service,s and processes across acute care hospitals and related ambulatory settings. RESULTS HF-RaSIs were completed by 501 acute care hospitals and urgent care centres, representing 94.7% of all HF hospitalisations across Canada. Only 12.2% of HF care was provided by hospitals with HF expertise and resources, and 50.9% of HF admissions were in centres with minimal outpatient or inpatient HF capabilities. Across all Canadian hospitals, 28.7% did not have access to B-type natriuretic peptide testing, and only 48.1% had access to on-site echocardiography. Designated HF medical directors were present at 21.6% of sites (108), and 16.2% sites (81) had dedicated inpatient interdisciplinary HF teams. Among all of the sites, 28.1% (141) were HF clinics, and of those, 40.4% (57) had average wait times from referral to first appointment of more than 2 weeks. CONCLUSIONS Significant gaps and geographic variation in delivery and access to HF services exist in Canada. This study highlights the need for provincial and national health systems changes and quality improvement initiatives to ensure equitable access to the appropriate evidence-based HF care.
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Affiliation(s)
- Nima Moghaddam
- Division of Cardiology, Duke University Medical Center, Durham, North Carolina, USA
| | | | - Nathaniel M Hawkins
- Division of Cardiology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kim Anderson
- Dalhousie, University QEII Health Sciences Centre, Halifax, Nova Scotia, Canada
| | - Anique Ducharme
- Institut de Cardiologie, de Montréal, Université de Montréal, Montréal, Québec, Canada
| | - Douglas S Lee
- Peter Munk Cardiac Centre, University Health Network, Toronto, Ontario, Canada
| | - Robert McKelvie
- St Joseph's Health Care, Western University, London, Ontario, Canada
| | - Stephanie Poon
- Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | | | | | - Sean Virani
- Division of Cardiology, University of British Columbia, Vancouver, British Columbia, Canada
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Dhalla NS, Bhullar SK, Adameova A, Mota KO, de Vasconcelos CML. Status of β 1-Adrenoceptor Signal Transduction System in Cardiac Hypertrophy and Heart Failure. Rev Cardiovasc Med 2023; 24:264. [PMID: 39076390 PMCID: PMC11270071 DOI: 10.31083/j.rcm2409264] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/30/2023] [Accepted: 06/15/2023] [Indexed: 07/31/2024] Open
Abstract
Although β 1-adrenoceptor ( β 1-AR) signal transduction, which maintains cardiac function, is downregulated in failing hearts, the mechanisms for such a defect in heart failure are not fully understood. Since cardiac hypertrophy is invariably associated with heart failure, it is possible that the loss of β 1-AR mechanisms in failing heart occurs due to hypertrophic process. In this regard, we have reviewed the information from a rat model of adaptive cardiac hypertrophy and maladaptive hypertrophy at 4 and 24 weeks after inducing pressure overload as well as adaptive cardiac hypertrophy and heart failure at 4 and 24 weeks after inducing volume overload, respectively. Varying degrees of alterations in β 1-AR density as well as isoproterenol-induced increases in cardiac function, intracellular Ca 2 + -concentration in cardiomyocytes and adenylyl cyclase activity in crude membranes have been reported under these hypertrophic conditions. Adaptive hypertrophy at 4 weeks of pressure or volume overload showed unaltered or augmented increases in the activities of different components of β 1-AR signaling. On the other hand, maladaptive hypertrophy due to pressure overload and heart failure due to volume overload at 24 weeks revealed depressions in the activities of β 1-AR signal transduction pathway. These observations provide evidence that β 1-AR signal system is either unaltered or upregulated in adaptive cardiac hypertrophy and downregulated in maladaptive cardiac hypertrophy or heart failure. Furthermore, the information presented in this article supports the concept that downregulation of β 1-AR mechanisms in heart failure or maladaptive cardiac hypertrophy is not due to hypertrophic process per se. It is suggested that a complex mechanism involving the autonomic imbalance may be of a critical importance in determining differential alterations in non-failing and failing hearts.
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Affiliation(s)
- Naranjan S. Dhalla
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, and Department of Physiology and Pathophysiology, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
| | - Sukhwinder K. Bhullar
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, and Department of Physiology and Pathophysiology, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
| | - Adriana Adameova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University and Centre of Experimental Medicine, Institute for Heart Research, Slovak Academy of Sciences, 811 03 Bratislava, Slovakia
| | - Karina Oliveira Mota
- Heart Biophysics Laboratory, Department of Physiology, Center for Biological and Health Sciences, Federal University of Sergipe, 73330 Sergipe, Brazil
| | - Carla Maria Lins de Vasconcelos
- Heart Biophysics Laboratory, Department of Physiology, Center for Biological and Health Sciences, Federal University of Sergipe, 73330 Sergipe, Brazil
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Ambulatory pulmonary artery pressure monitoring reduces costs and improves outcomes in symptomatic heart failure: a single center Canadian experience. CJC Open 2022; 5:237-249. [PMID: 37013072 PMCID: PMC10066443 DOI: 10.1016/j.cjco.2022.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 12/20/2022] [Indexed: 12/27/2022] Open
Abstract
Background Pulmonary artery pressure (PAP) monitoring reduces heart failure (HF) hospitalizations (HFHs) and improves quality of life in New York Heart Association (NYHA) class III HF. We evaluated the impact of PAP monitoring on outcomes and health spending in a Canadian ambulatory HF cohort. Methods Twenty NYHA III HF patients underwent wireless PAP implantation at Foothills Medical Centre, Calgary, Alberta. Baseline, and 3-, 6-, 9-, and 12-month assessments of laboratory parameters, hemodynamics, 6-minute walk text and Kansas City Cardiomyopathy Questionnaire scores were collected. Healthcare costs 1 year pre- and post-implantation were collected from administrative databases. Results Mean age was 70.6 years; 45% were female. Results were as follows: an 88% reduction in emergency room visits (P = 0.0009); an 87% reduction in HFHs (P < 0.0003); a 29% reduction in heart function clinic visits (P = 0.033), and a 178% increase in nurse calls (P < 0.0002). Questionnaire and 6-minute walk test scores at baseline vs last follow-up were 45.4 vs 48.4 (P = 0.48) and 364.4 vs 402.8 m (P = 0.58), respectively. Mean PAP at baseline vs follow-up was 31.5 vs 24.8 mm Hg (P = 0.005). NYHA class improved by at least one class in 85% of patients. Mean measurable HF-related spending preimplantation was CAD$29,814 per patient per year and postimplantation was CAD$25,642 per patient per year (including device cost). Conclusions PAP monitoring demonstrated reductions in HFHs, and emergency room and heart function clinic visits, with improvements in NYHA class. Although further economic evaluation is needed, these results support the use of PAP monitoring as an effective and cost-neutral tool in HF management in appropriately selected patients in a publicly funded healthcare system.
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