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Lowry MTH, Kimenai DM, Doudesis D, Georgiev K, McDermott M, Bularga A, Taggart C, Wereski R, Ferry AV, Stewart SD, Tuck C, Newby DE, Mills NL, Anand A. The electronic frailty index and outcomes in patients with myocardial infarction. Age Ageing 2024; 53:afae150. [PMID: 39011637 PMCID: PMC11249914 DOI: 10.1093/ageing/afae150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 07/03/2024] [Indexed: 07/17/2024] Open
Abstract
BACKGROUND Frailty is increasingly present in patients with acute myocardial infarction. The electronic Frailty Index (eFI) is a validated method of identifying vulnerable older patients in the community from routine primary care data. Our aim was to assess the relationship between the eFI and outcomes in older patients hospitalised with acute myocardial infarction. STUDY DESIGN AND SETTING Retrospective cohort study using the DataLoch Heart Disease Registry comprising consecutive patients aged 65 years or over hospitalised with a myocardial infarction between October 2013 and March 2021. METHODS Patients were classified as fit, mild, moderate, or severely frail based on their eFI score. Cox-regression analysis was used to determine the association between frailty category and all-cause mortality. RESULTS In 4670 patients (median age 77 years [71-84], 43% female), 1865 (40%) were classified as fit, with 1699 (36%), 798 (17%) and 308 (7%) classified as mild, moderate and severely frail, respectively. In total, 1142 patients died within 12 months of which 248 (13%) and 147 (48%) were classified as fit and severely frail, respectively. After adjustment, any degree of frailty was associated with an increased risk of all-cause death with the risk greatest in the severely frail (reference = fit, adjusted hazard ratio 2.87 [95% confidence intervals 2.24 to 3.66]). CONCLUSION The eFI identified patients at high risk of death following myocardial infarction. Automatic calculation within administrative data is feasible and could provide a low-cost method of identifying vulnerable older patients on hospital presentation.
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Affiliation(s)
- Matthew T H Lowry
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Dorien M Kimenai
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Dimitrios Doudesis
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
- Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Konstantin Georgiev
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Michael McDermott
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Anda Bularga
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Caelan Taggart
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Ryan Wereski
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Amy V Ferry
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Stacey D Stewart
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Christopher Tuck
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - David E Newby
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Nicholas L Mills
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
- Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Atul Anand
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
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Rakisheva A, Soloveva A, Shchendrygina A, Giverts I. Heart Failure With Preserved Ejection Fraction and Frailty: From Young to Superaged Coexisting HFpEF and Frailty. INTERNATIONAL JOURNAL OF HEART FAILURE 2024; 6:93-106. [PMID: 39081641 PMCID: PMC11284337 DOI: 10.36628/ijhf.2023.0064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 04/01/2024] [Accepted: 06/14/2024] [Indexed: 08/02/2024]
Abstract
Being commonly diagnosed in elderly women and associated with comorbidities as well as ageing-related cardio-vascular changes, heart failure with preserved ejection fraction (HFpEF) has been recently considered as a distinct cardiogeriatric syndrome. Frailty is another frequent geriatric syndrome. HFpEF and frailty share common underlying mechanisms, often co-exist, and represent each other's risk factors. A threshold of 65 years old is usually used to screen patients for both frailty and HFpEF in research and clinical settings. However, both HFpEF and frailty are very heterogenous conditions that may develop at younger ages. In this review we aim to provide a broader overview on the coexistence of HFpEF and frailty throughout the lifetime. We hypothesize that HFpEF and frailty patients' profiles (young, elderly, superaged) represent a continuum of the common ageing process modified by cumulative exposure to risk factors resulting to a presentation of HFpEF and frailty at different ages. We believe, that suggested approach might stimulate assessment of frailty in HFpEF assessment and vice versa regardless of age and early implementation of targeted interventions. Future studies of pathophysiology, clinical features, and outcomes of frailty in HFpEF by age are needed.
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Affiliation(s)
| | - Anzhela Soloveva
- Department of Cardiology, Almazov Almazov National Medical Research Centre, Saint Petersburg, Russia
| | | | - Ilya Giverts
- Maimonides Medical Center, Brooklyn, NY, USA
- Massachusetts General Hospital, Boston, MA, USA
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Doody H, Ayre J, Livori A, Ilomäki J, Khalil V, Bell JS, Morton JI. The impact of frailty on initiation, continuation and discontinuation of secondary prevention medications following myocardial infarction. Arch Gerontol Geriatr 2024; 122:105370. [PMID: 38367524 DOI: 10.1016/j.archger.2024.105370] [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] [Received: 11/13/2023] [Revised: 02/02/2024] [Accepted: 02/12/2024] [Indexed: 02/19/2024]
Abstract
AIM To evaluate the association between frailty and initiating, continuing, or discontinuing secondary prevention medications following myocardial infarction (MI). METHODS We conducted a cohort study using linked health data, including all adults aged ≥65 years who discharged from hospital following MI from January 2013 to April 2018 in Victoria, Australia (N = 29,771). The Hospital Frailty Risk Score (HFRS) was used to assess frailty. Logistic regression was used to investigate associations of frailty with initiation, continuation, and discontinuation of secondary prevention medications (P2Y12 inhibitor antiplatelets, beta-blockers, renin-angiotensin-aldosterone system (RAAS) inhibitors, and lipid-lowering therapies) in the 90 days from discharge post-MI, by HFRS, adjusted for age, sex, and Charlson Comorbidity Index. RESULTS Increasing frailty was associated with lower probability of initiating and continuing P2Y12 inhibitors, RAAS inhibitors, and lipid-lowering therapies, but not beta-blockers. At at an HFRS of 0, the predicted probabiliy of having all four medications initiated or continued was 0.59 (95 %CI 0.57-0.62) for STEMI and 0.35 (0.34-0.36) for non-STEMI, compared to 0.38 (0.33-0.42) and 0.16 (0.14-0.18) at an HFRS of 15. Increasing frailty was associated with higher probability of discontinuing these medications post-MI. The predicted probability of discontinuing at least one secondary prevention medication post-MI at an HFRS of 0 was 0.10 (0.08-0.11) for STEMI and 0.14 (0.13-0.15) for non-STEMI, compared to 0.27 (0.22-0.32) and 0.34 (0.32-0.36) at an HFRS of 15. CONCLUSION People with higher levels of frailty were managed more conservatively following MI than people with lower levels of frailty. Whether this conservative treatment is justified warrants further study.
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Affiliation(s)
- Hannah Doody
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Melbourne, Australia; Pharmacy Department, Launceston General Hospital, Tasmania, Australia; Pharmacy Department, Monash Health - Victorian Heart Hospital, Melbourne, Australia
| | - Justine Ayre
- Pharmacy Department, Launceston General Hospital, Tasmania, Australia
| | - Adam Livori
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Melbourne, Australia; Grampians Health, Ballarat, Australia
| | - Jenni Ilomäki
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Melbourne, Australia
| | - Viviane Khalil
- Pharmacy Department, Monash Health - Victorian Heart Hospital, Melbourne, Australia; Faculty of Medicine, Nursing & Health Sciences, Monash University, Melbourne Australia
| | - J Simon Bell
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Melbourne, Australia
| | - Jedidiah I Morton
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Melbourne, Australia; Diabetes and Population Health, Baker Heart and Diabetes Institute, Melbourne, Australia.
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Sentandreu-Mañó T, Torres Z, Luján-Arribas C, Tomás JM, González-Cervantes JJ, Marques-Sule E. Linking Myocardial Infarction and Frailty Status at Old Age in Europe: Moderation Effects of Country and Gender. J Cardiovasc Dev Dis 2024; 11:176. [PMID: 38921676 PMCID: PMC11203841 DOI: 10.3390/jcdd11060176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 06/03/2024] [Accepted: 06/06/2024] [Indexed: 06/27/2024] Open
Abstract
BACKGROUND Myocardial infarction (MI) is a serious condition affecting a considerable number of individuals, with important clinical consequences. Understanding the associated factors is crucial for effective management and prevention. This study aimed to (1) examine the association between MI and frailty in a sample of older European adults and (2) investigate the moderating effects of country and gender on this association. METHODS A cross-sectional survey of 22,356 Europeans aged 60 years and older was conducted. The data come from the sixth wave of the Survey of Health, Ageing and Retirement in Europe. Frailty, MI, gender, and country were studied. RESULTS Frailty is strongly associated with MI. Robust older adults are 13.31 times more likely not to have an MI. However, these odds drop to 5.09 if pre-frail and to 2.73 if frail. Gender, but not country, moderates this relationship. There is a strong association between MI and frailty in men, whereas for women, the association is not as strong. CONCLUSIONS Frailty is highly associated with MI in European older adults. Country did not moderate the link between frailty and MI but gender does, with the relationship being notably stronger in men. The frailty-MI association remained significant even when controlling for a number of personal conditions and comorbidities.
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Affiliation(s)
- Trinidad Sentandreu-Mañó
- Department of Physiotherapy, University of Valencia, 46010 Valencia, Spain; (T.S.-M.); (C.L.-A.); (E.M.-S.)
| | - Zaira Torres
- Department of Methodology for the Behavioral Sciences, University of Valencia, 46010 Valencia, Spain;
| | - Cecilia Luján-Arribas
- Department of Physiotherapy, University of Valencia, 46010 Valencia, Spain; (T.S.-M.); (C.L.-A.); (E.M.-S.)
| | - José M. Tomás
- Department of Methodology for the Behavioral Sciences, University of Valencia, 46010 Valencia, Spain;
| | | | - Elena Marques-Sule
- Department of Physiotherapy, University of Valencia, 46010 Valencia, Spain; (T.S.-M.); (C.L.-A.); (E.M.-S.)
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Zhang H, Liu X, Wang X, Jiang Y. Association of two novel systemic inflammatory biomarkers and frailty based on NHANES 2007-2018. Front Public Health 2024; 12:1377408. [PMID: 38655524 PMCID: PMC11036374 DOI: 10.3389/fpubh.2024.1377408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 03/25/2024] [Indexed: 04/26/2024] Open
Abstract
Background Frailty is a significant concern in the field of public health. However, currently, there is a lack of widely recognized and reliable biological markers for frailty. This study aims to investigate the association between systemic inflammatory biomarkers and frailty in the older adult population in the United States. Methods This study employed data from the National Health and Nutrition Examination Survey (NHANES) spanning 2007 to 2018 and conducted a rigorous cross-sectional analysis. We constructed weighted logistic regression models to explore the correlation between the Systemic Immune-Inflammation Index (SII), Systemic Inflammatory Response Index (SIRI), and frailty in the population aged 40 to 80 years. Using restricted cubic spline (RCS), we successfully visualized the relationship between SII, SIRI, and frailty. Finally, we presented stratified analyses and interaction tests of covariates in a forest plot. Results This study involved 11,234 participants, 45.95% male and 54.05% female, with an average age of 64.75 ± 0.13 years. After adjusting for relevant covariates, the weighted logistic regression model indicated an odds ratio (OR) and 95% confidence interval(CI) for the correlation between frailty and the natural logarithm (ln) transformed lnSII and lnSIRI as 1.38 (1.24-1.54) and 1.69 (1.53-1.88), respectively. Subsequently, we assessed different levels of lnSII and lnSIRI, finding consistent results. In the lnSII group model, the likelihood of frailty significantly increased in the fourth quartile (OR = 1.82, 95% CI: 1.55-2.12) compared to the second quartile. In the lnSIRI group model, the likelihood of frailty significantly increased in the third quartile (OR = 1.30, 95% CI: 1.10-1.53) and fourth quartile (OR = 2.29, 95% CI: 1.95-2.70) compared to the second quartile. The interaction results indicate that age and income-to-poverty ratio influence the association between lnSIRI and frailty. RCS demonstrated a nonlinear relationship between lnSII, lnSIRI, and frailty. Conclusion The results of this cross-sectional study indicate a positive correlation between systemic inflammatory biomarkers (SII, SIRI) and frailty.
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Affiliation(s)
- Huiling Zhang
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Xinyu Liu
- Department of Cardiology, Linyi Traditional Chinese Medicine Hospital, Linyi, China
| | - Xiaoling Wang
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Ya Jiang
- Department of Cardiology, Linyi Traditional Chinese Medicine Hospital, Linyi, China
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Zong M, Guan X, Huang W, Chang J, Zhang J. Effect of Frailty on the Long-Term Prognosis of Elderly Patients with Acute Myocardial Infarction. Clin Interv Aging 2023; 18:2021-2029. [PMID: 38058549 PMCID: PMC10697082 DOI: 10.2147/cia.s433221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 11/18/2023] [Indexed: 12/08/2023] Open
Abstract
Background To investigate the effect of frailty on the long-term prognosis of elderly patients with acute myocardial infarction (AMI). Methods The data of 238 AMI patients (aged ≥75 years) were retrospectively reviewed. They were divided into two groups according to the Modified Frailty Index (mFI): frailty group (mFI≥0.27, n=143) and non-frailty group (mFI<0.27, n=95). The major adverse cardiovascular and cerebrovascular events (MACEs) and Kaplan-Meier survival curves of the two groups were compared. Multivariate Cox regression analysis was used to identify the risk factors for MACEs. Results The frailty group showed a significantly older age as well as a higher N-terminal proB-type natriuretic peptide level, Global Registry of Acute Coronary Events score, and CRUSADE bleeding score compared with the non-frailty group (P<0.05). A significantly greater proportion of patients with combined heart failure, atrial fibrillation, comorbidity, and activities of daily living score of <60 was also observed in the frailty group compared with the non-frailty group (P<0.05). At 36 months after AMI, the frailty group vs the non-frailty group showed a significantly poorer survival (log-rank P=0.005), higher incidence of MACEs (50.35 vs 29.47, P=0.001), higher overall mortality rate (20.98% vs 7.37%, P=0.006), higher 30-day mortality rate (13.99% vs 5.26%, P=0.033), higher major bleeding rate (14.69% vs 5.26, P=0.018), and lower repeat revascularization rate (2.10% vs 8.42%, P=0.03). Frailty, type 2 diabetes, and N-terminal proB-type natriuretic peptide ≥1800 pg/mL were independent risk factors for MACEs. Conclusion Frailty is an independent risk factor affecting the long-term prognosis of elderly patients with AMI.
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Affiliation(s)
- Min Zong
- Department of Heart Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People’s Republic of China
| | - Xiaonan Guan
- Department of Heart Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People’s Republic of China
| | - Wen Huang
- Department of Heart Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People’s Republic of China
| | - Jing Chang
- Department of Internal Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People’s Republic of China
| | - Jianjun Zhang
- Department of Heart Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People’s Republic of China
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Doody H, Livori A, Ayre J, Ademi Z, Bell JS, Morton JI. Guideline concordant prescribing following myocardial infarction in people who are frail: A systematic review. Arch Gerontol Geriatr 2023; 114:105106. [PMID: 37356114 DOI: 10.1016/j.archger.2023.105106] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 06/15/2023] [Accepted: 06/16/2023] [Indexed: 06/27/2023]
Abstract
AIMS The risk-to-benefit ratio of cardioprotective medications in frail older adults is uncertain. The objective was to systematically review prescribing of guideline-recommended cardioprotective medications following myocardial infarction (MI) in people who are frail. DATA SOURCES Ovid Medline, PubMed and Cochrane were searched from inception to October 2022 for studies that reported prescribing of one or more cardioprotective medication classes post-MI or acute coronary syndromes in people with frailty. STUDY SELECTION We included observational studies that reported prescribing of cardioprotective medications post-MI stratified by frailty status. RESULTS Overall, 16 cohort studies published from 2013 to 2022 that used seven different frailty scales were included. Prescribing of all cardioprotective medication classes following MI was lower in frail compared to non-frail people, with absolute rates of prescribing varying substantially across studies. Median prescribing in frail and non-frail people, respectively, was 88.9% (IQR 81.5-96.2) and 93.1% (IQR 92.0-98.9) for aspirin; 68.1% (IQR 61.9-91.2) and 86.7% (IQR 79.5-92.8) for P2Y12-inhibitors; 83.1% (IQR 76.9-91.3) and 94.0% (IQR 87.1-95.9) for lipid-lowering therapy; 67.9% (IQR 60.6-74.0) and 74.7% (IQR 71.3-84.5) for angiotensin-converting enzyme inhibitor/angiotensin II receptor blockers; and 74.1% (IQR 69.2-79) and 77.6% (IQR 71.8-85.9) for beta-blockers. CONCLUSION People who were frail were less likely to be prescribed guideline recommended medication classes post-MI than those who were non-frail. Further research is needed into treatment benefits and risks in frail people to avoid unnecessarily withholding treatment in this high-risk population, while also minimising potential for medication related harm.
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Affiliation(s)
- Hannah Doody
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Australia; Pharmacy Department, Launceston General Hospital, Tasmania, Australia
| | - Adam Livori
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Australia; Grampians Health, Ballarat, Victoria, Australia
| | - Justine Ayre
- Pharmacy Department, Launceston General Hospital, Tasmania, Australia
| | - Zanfina Ademi
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Australia; School of Public Health and Preventive Medicine, Monash University, Australia
| | - J Simon Bell
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Australia
| | - Jedidiah I Morton
- Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Australia.
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Hanna JM, Wang SY, Kochar A, Park DY, Damluji AA, Henry GA, Ahmad Y, Curtis JP, Nanna MG. Complex Percutaneous Coronary Intervention Outcomes in Older Adults. J Am Heart Assoc 2023; 12:e029057. [PMID: 37776222 PMCID: PMC10727245 DOI: 10.1161/jaha.122.029057] [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: 12/01/2022] [Accepted: 07/17/2023] [Indexed: 10/02/2023]
Abstract
Background Complex percutaneous coronary intervention (PCI) is increasingly performed in older adults (age ≥75 years) with stable ischemic heart disease. However, little is known about clinical outcomes. Methods and Results We derived a cohort of older adults undergoing elective PCI for stable ischemic heart disease across a large health system. We compared 12-month event-free survival (freedom from all-cause death, nonfatal myocardial infarction, stroke, and major bleeding), all-cause death, target lesion revascularization, and bleeding events for patients receiving complex versus noncomplex PCI and derived risk estimates with Cox regression models. We included 513 patients (mean age, 81±5 years). Patients receiving complex PCI versus noncomplex PCI did not significantly differ across a host of clinical characteristics including cardiovascular disease features, noncardiac comorbidities, guideline-directed medical therapy use, and frailty. Patients receiving complex PCI versus noncomplex PCI experienced worse event-free survival (80.4% versus 86.8%), which was not significant in adjusted analyses (hazard ratio [HR], 1.38 [95% CI, 0.88-2.16]). All-cause death at 1 year for patients undergoing complex PCI was nearly double that seen for patients receiving noncomplex PCI (10.2% versus 5.9%), and the risk was significant in models adjusted for clinical characteristics (HR, 1.97 [95% CI, 1.02-3.79]). Target lesion revascularization risk was lower for patients receiving complex PCI (2.2% versus 3.5%, adjusted HR), but bleeding events were not statistically different between groups (25.3% versus 20.5%; P=0.19). Conclusions Complex PCI in older adults with stable ischemic heart disease was associated with lower risk of target lesion revascularization but higher all-cause death compared with noncomplex PCI.
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Affiliation(s)
- Jonathan M. Hanna
- Department of Internal MedicineYale School of MedicineNew HavenCTUSA
| | - Stephen Y. Wang
- Department of Internal MedicineYale School of MedicineNew HavenCTUSA
| | - Ajar Kochar
- Department of Cardiovascular MedicineBrigham and Women’s Hospital, Harvard Medical SchoolBostonMAUSA
- Richard and Susan Smith Center for Outcomes Research in Cardiology, Beth Israel Deaconess Medical Center, Harvard Medical SchoolBostonMAUSA
| | - Dae Yong Park
- Department of Medicine, Cook County HealthChicagoILUSA
| | - Abdulla A. Damluji
- Inova Center of Outcomes ResearchFalls ChurchVAUSA
- Johns Hopkins University School of MedicineBaltimoreMDUSA
| | - Glen A. Henry
- Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of MedicineNew HavenCTUSA
| | - Yousif Ahmad
- Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of MedicineNew HavenCTUSA
| | - Jeptha P. Curtis
- Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of MedicineNew HavenCTUSA
| | - Michael G. Nanna
- Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of MedicineNew HavenCTUSA
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