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Raju S, Siddharthan T, McCormack MC, Patel SR, Kunisaki KM, D’Souza G, Cho JHJ, Stosor V, Morris A, Margolick JB, Brown TT, Punjabi NM. Influence of Impaired Diffusing Capacity and Sleep-disordered Breathing on Nocturnal Hypoxemia and Health Outcomes in Men with and without Human Immunodeficiency Virus. Ann Am Thorac Soc 2024; 21:1085-1093. [PMID: 38498872 PMCID: PMC11284323 DOI: 10.1513/annalsats.202309-757oc] [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: 09/01/2023] [Accepted: 03/18/2024] [Indexed: 03/20/2024] Open
Abstract
Rationale: Nocturnal hypoxemia is common in sleep-disordered breathing (SDB) and is associated with increased morbidity and mortality. Although impaired diffusing capacity of the lung for carbon monoxide (DlCO) is associated with daytime hypoxemia, its influence on SDB-related nocturnal hypoxemia is not known. Objectives: To characterize the effects of DlCO impairment on SDB-related nocturnal hypoxemia and associated health outcomes. Methods: Data from a multicenter cohort of men with and without human immunodeficiency virus (HIV) infection, with concomitant measures of DlCO and home-based polysomnography (n = 544), were analyzed. Multivariable quantile regression models characterized associations between DlCO and several measures of SDB-related hypoxemia (e.g., total sleep time with oxygen saturation as measured by pulse oximetry [SpO2] < 90% [T90]). Structural equation models were used to assess associations of impaired DlCO and SDB-related hypoxemia measures with prevalent hypertension and type 2 diabetes. Results: DlCO impairment (<80% predicted) was associated with sleep-related hypoxemia. Participants with severe SDB (apnea-hypopnea index ⩾ 30 events/h) and impaired DlCO had higher T90 (median difference, 15.0% [95% confidence interval (CI), 10.3% to 19.7%]) and average SDB-related desaturation (median difference, 1.0 [95% CI, 0.5 to 1.5]) and lower nadir SpO2 (median difference, -8.2% [95% CI, -11.4% to -4.9%]) and average SpO2 during sleep (median difference, -1.1% [95% CI, -2.1% to -0.01%]) than those with severe SDB and preserved DlCO. Higher T90 was associated with higher adjusted odds of prevalent hypertension (odds ratio, 1.39 [95% CI, 1.14 to 1.70]) and type 2 diabetes (odds ratio, 1.25 [95% CI, 1.07 to 1.46]). Conclusions: DlCO impairment in severe SDB was associated with sleep-related hypoxemia, prevalent hypertension, and type 2 diabetes. Assessment of SDB should be considered in those with impaired DlCO to guide testing and risk stratification strategies.
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Affiliation(s)
- Sarath Raju
- Division of Pulmonary and Critical Care Medicine and
| | - Trishul Siddharthan
- Division of Pulmonary and Critical Care Medicine and
- Division of Pulmonary and Critical Care Medicine, Miller School of Medicine, University of Miami, Miami, Florida
| | | | - Sanjay R. Patel
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ken M. Kunisaki
- Section of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Minneapolis Veterans Affairs Health Care System, Minneapolis, Minnesota
- Divison of Pulmonary, Allergy, Critical Care, and Sleep Medicine, University of Minnesota, Minneapolis, Minnesota
| | - Gypsyamber D’Souza
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Joshua Hyong-Jin Cho
- Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, California; and
| | - Valentina Stosor
- Division of Infectious Diseases, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Alison Morris
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Joseph B. Margolick
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Todd T. Brown
- Division of Endocrinology, Diabetes, and Metabolism, School of Medicine, and
| | - Naresh M. Punjabi
- Division of Pulmonary and Critical Care Medicine and
- Division of Pulmonary and Critical Care Medicine, Miller School of Medicine, University of Miami, Miami, Florida
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Balasubramanian A, Gearhart AS, Putcha N, Fawzy A, Singh A, Wise RA, Hansel NN, McCormack MC. Diffusing Capacity as a Predictor of Hospitalizations in a Clinical Cohort of Chronic Obstructive Pulmonary Disease. Ann Am Thorac Soc 2024; 21:243-250. [PMID: 37870393 PMCID: PMC10848911 DOI: 10.1513/annalsats.202301-014oc] [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: 01/05/2023] [Accepted: 10/19/2023] [Indexed: 10/24/2023] Open
Abstract
Rationale: Chronic obstructive pulmonary disease (COPD) hospitalizations are a major burden on patients. Diffusing capacity of the lung for carbon monoxide (DlCO) is a potential predictor that has not been studied in large cohorts. Objectives: This study used electronic health record data to evaluate whether clinically obtained DlCO predicts COPD hospitalizations. Methods: We performed time-to-event analyses of individuals with COPD and DlCO measurements from the Johns Hopkins COPD Precision Medicine Center of Excellence. Cox proportional hazard methods were used to model time from DlCO measurement to first COPD hospitalization and composite first hospitalization or death, adjusting for age, sex, race, body mass index, smoking status, forced expiratory volume in 1 second (FEV1), history of prior COPD hospitalization, and comorbidities. To identify the utility of including DlCO in risk models, area under the receiver operating curve (AUC) values were calculated for models with and without DlCO. Results were externally validated in a separate analogous cohort. Results: Of 2,793 participants, 368 (13%) had a COPD hospitalization within 3 years. In adjusted analyses, for every 10% decrease in DlCO% predicted, risk of COPD hospitalization increased by 10% (hazard ratio, 1.1; 95% confidence interval, 1.1-1.2; P < 0.001). Similar associations were observed for COPD hospitalizations or death. The model including demographics, comorbidities, FEV1, DlCO, and prior COPD hospitalizations performed well, with an AUC of 0.85 and an AUC of 0.84 in an external validation cohort. Conclusions: Diffusing capacity is a strong predictor of COPD hospitalizations in a clinical cohort of individuals with COPD, independent of airflow obstruction and prior hospitalizations. These findings support incorporation of DlCO in risk assessment of patients with COPD.
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Affiliation(s)
- Aparna Balasubramanian
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Andrew S. Gearhart
- Research and Exploratory Development Department, Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland; and
| | - Nirupama Putcha
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Ashraf Fawzy
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Anil Singh
- Division of Pulmonary, Critical Care, Allergy, and Sleep, Alleghany Health Network, Highmark Health, Pittsburgh, Pennsylvania
| | - Robert A. Wise
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Nadia N. Hansel
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Meredith C. McCormack
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, Maryland
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Manzi L, Sperandeo L, Forzano I, Castiello DS, Florimonte D, Paolillo R, Santoro C, Mancusi C, Di Serafino L, Esposito G, Gargiulo G. Contemporary Evidence and Practice on Right Heart Catheterization in Patients with Acute or Chronic Heart Failure. Diagnostics (Basel) 2024; 14:136. [PMID: 38248013 PMCID: PMC10814482 DOI: 10.3390/diagnostics14020136] [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: 11/13/2023] [Revised: 12/21/2023] [Accepted: 01/04/2024] [Indexed: 01/23/2024] Open
Abstract
Heart failure (HF) has a global prevalence of 1-2%, and the incidence around the world is growing. The prevalence increases with age, from around 1% for those aged <55 years to >10% for those aged 70 years or over. Based on studies in hospitalized patients, about 50% of patients have heart failure with reduced ejection fraction (HFrEF), and 50% have heart failure with preserved ejection fraction (HFpEF). HF is associated with high morbidity and mortality, and HF-related hospitalizations are common, costly, and impact both quality of life and prognosis. More than 5-10% of patients deteriorate into advanced HF (AdHF) with worse outcomes, up to cardiogenic shock (CS) condition. Right heart catheterization (RHC) is essential to assess hemodynamics in the diagnosis and care of patients with HF. The aim of this article is to review the evidence on RHC in various clinical scenarios of patients with HF.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Giuseppe Gargiulo
- Department of Advanced Biomedical Sciences, Federico II University of Naples, 80131 Naples, Italy; (L.M.); (L.S.); (I.F.); (D.S.C.); (D.F.); (R.P.); (C.S.); (C.M.); (L.D.S.); (G.E.)
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Pust F, Deis T, Larsson J, Hansen BL, Rossing K, Ersbøll M, Kristensen SL, Gustafsson F. Importance of heart failure duration for development of pulmonary hypertension in advanced heart failure. Int J Cardiol 2023; 391:131232. [PMID: 37604286 DOI: 10.1016/j.ijcard.2023.131232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/24/2023] [Accepted: 07/28/2023] [Indexed: 08/23/2023]
Abstract
BACKGROUND AND OBJECTIVES Pulmonary vascular resistance (PVR) is critical when evaluating candidacy for advanced heart failure (HF) therapies, but risk factors for elevated PVR are not well studied. We hypothesized that HF duration would be associated with elevated PVR. METHODS Danish single-center registry of consecutive in- and outpatients undergoing right heart catheterization as part of advanced HF work up. The relation between HF duration and PVR was estimated by regression analysis. Finally, the relation between PVR and long-term mortality was assessed by Cox proportional hazards regression and Kaplan-Meier analyses. RESULTS A total of 549 patients (77% men, median age 54 (43-61) years, median HF duration 1.6 years (0.1-7.1)) were included. Univariate linear regression displayed an association between longer HF duration and increasing PVR (p = 0.014). PVR > 3 WU was present in 92 patients (17%) who were older (median p < 0.001) and had longer HF duration (p = 0.03). HF duration (per 1 year increase) did not predict PVR > 3 WU after adjustment for covariables (OR 1.00; p = 0.99). During a mean follow-up time of 4.5 years, there were 240 (44%) deaths. Increasing PVR was associated with elevated all-cause mortality risk (adjusted HR 1.24; p < 0.001). PVR > 3 WU was associated with higher mortality (adjusted HR 1.49; p = 0.027). CONCLUSION Longer duration of HF was associated with higher PVR in patients with advanced HF, but this association disappeared in multivariate analyses. Longer HF duration per se likely does not cause elevated PVR and should not discourage evaluation for heart transplantation.
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Affiliation(s)
- Freja Pust
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark
| | - Tania Deis
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark
| | - Johan Larsson
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark
| | | | - Kasper Rossing
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark
| | - Mads Ersbøll
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark
| | | | - Finn Gustafsson
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark; Department of Clinical Medicine, University of Copenhagen, Denmark.
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Lamba HK, Hart LD, Zhang Q, Loera JM, Civitello AB, Nair AP, Senussi MH, Loor G, Liao KK, Shafii AE, Chatterjee S. Clinical Predictors and Outcomes After Left Ventricular Assist Device Implantation and Tracheostomy. Tex Heart Inst J 2023; 50:e238100. [PMID: 37624675 PMCID: PMC10660898 DOI: 10.14503/thij-23-8100] [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: 08/27/2023]
Abstract
BACKGROUND Postoperative respiratory failure is a major complication that affects up to 10% of patients who undergo cardiac surgery and has a high in-hospital mortality rate. Few studies have investigated whether patients who require tracheostomy for postoperative respiratory failure after continuous-flow left ventricular assist device (CF-LVAD) implantation have worse survival outcomes than patients who do not. OBJECTIVE To identify risk factors for respiratory failure necessitating tracheostomy in CF-LVAD recipients and to compare survival outcomes between those who did and did not require tracheostomy. METHODS Consecutive patients who underwent primary CF-LVAD placement at a single institution between August 1, 2002, and December 31, 2019, were retrospectively reviewed. Propensity score matching accounted for baseline differences between the tracheostomy and nontracheostomy groups. Multivariate logistic regression was used to identify tracheostomy risk factors and 90-day survival; Kaplan-Meier analysis was used to assess midterm survival. RESULTS During the study period, 664 patients received a CF-LVAD; 106 (16.0%) underwent tracheostomy for respiratory failure. Propensity score matching produced 103 matched tracheostomy-nontracheostomy pairs. Patients who underwent tracheostomy were older (mean [SD] age, 57.9 [12.3] vs 54.6 [13.9] years; P = .02) and more likely to need preoperative mechanical circulatory support (61.3% vs 47.8%; P = .01) and preoperative intubation (27.4% vs 8.8%; P < .001); serum creatinine was higher in the tracheostomy group (mean [SD], 1.7 [1.0] vs 1.4 [0.6] mg/dL; P < .001), correlating with tracheostomy need (odds ratio, 1.76; 95% CI, 1.21-2.56; P = .003). Both before and after propensity matching, 30-day, 60-day, 90-day, and 1-year survival were worse in patients who underwent tracheostomy. Median follow-up was 0.8 years (range, 0.0-11.2 years). Three-year Kaplan-Meier survival was significantly worse for the tracheostomy group before (22.0% vs 61.0%; P < .001) and after (22.4% vs 48.3%; P < .001) matching. CONCLUSION Given the substantially increased probability of death in patients who develop respiratory failure and need tracheostomy, those at high risk for respiratory failure should be carefully considered for CF-LVAD implantation. Comprehensive management to decrease respiratory failure before and after surgery is critical.
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Affiliation(s)
- Harveen K. Lamba
- Division of Cardiothoracic Transplantation and Circulatory Support, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
| | - Lucy D. Hart
- Division of Cardiothoracic Transplantation and Circulatory Support, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
| | - Qianzi Zhang
- Division of Cardiothoracic Surgery, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
| | - Jackquelin M. Loera
- Division of Cardiothoracic Transplantation and Circulatory Support, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
| | - Andrew B. Civitello
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas
- Department of Cardiovascular Surgery, The Texas Heart Institute, Houston, Texas
| | - Ajith P. Nair
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas
- Department of Cardiovascular Surgery, The Texas Heart Institute, Houston, Texas
| | - Mourad H. Senussi
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Gabriel Loor
- Division of Cardiothoracic Transplantation and Circulatory Support, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
- Department of Cardiovascular Surgery, The Texas Heart Institute, Houston, Texas
| | - Kenneth K. Liao
- Division of Cardiothoracic Transplantation and Circulatory Support, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
- Department of Cardiovascular Surgery, The Texas Heart Institute, Houston, Texas
| | - Alexis E. Shafii
- Division of Cardiothoracic Transplantation and Circulatory Support, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
- Department of Cardiovascular Surgery, The Texas Heart Institute, Houston, Texas
| | - Subhasis Chatterjee
- Division of Cardiothoracic Surgery, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
- Department of Cardiovascular Surgery, The Texas Heart Institute, Houston, Texas
- Division of Trauma and Acute Care Surgery, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas
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Gelzinis TA, Ungerman E, Jayaraman AL, Bartels S, Bond JA, Hayanga HK, Patel B, Khoche S, Subramanian H, Ball R, Knight J, Choi C, Ellis S. The Year in Cardiothoracic Transplant Anesthesia: Selected Highlights From 2021 Part II: Cardiac Transplantation. J Cardiothorac Vasc Anesth 2023:S1053-0770(23)00339-7. [PMID: 37353423 DOI: 10.1053/j.jvca.2023.05.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 05/17/2023] [Indexed: 06/25/2023]
Abstract
This article spotlights the research highlights of this year that specifically pertain to the specialty of anesthesia for heart transplantation. This includes the research on recent developments in the selection and optimization of donors and recipients, including the use of donation after cardiorespiratory death and extended criteria donors, the use of mechanical circulatory support and nonmechanical circulatory support as bridges to transplantation, the effect of COVID-19 on heart transplantation candidates and recipients, and new advances in the perioperative management of these patients, including the use of echocardiography and postoperative outcomes, focusing on renal and cerebral outcomes.
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Affiliation(s)
| | - Elizabeth Ungerman
- Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Arun L Jayaraman
- Department of Anesthesiology and Perioperative Medicine, Department of Critical Care Medicine, Mayo Clinic, Pheonix, AZ
| | - Steven Bartels
- Department of Anesthesiology and Perioperative Medicine, Loyola University Medical Center, Maywood, IL
| | - Jonathan A Bond
- Division of Adult Cardiothoracic Anesthesiology, University of Kentucky, Lexington, KY
| | - Heather K Hayanga
- Division of Cardiovascular and Thoracic Anesthesiology, Department of Anesthesiology, West Virginia University, WV
| | - Bhoumesh Patel
- Department of Anesthesiology, Yale School of Medicine, New Haven, CT
| | - Swapnil Khoche
- Department of Anesthesiology, University of California, San Diego, CA
| | - Harikesh Subramanian
- Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Ryan Ball
- Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Joshua Knight
- Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Christine Choi
- Department of Anesthesiology, University of California, San Diego, CA
| | - Sarah Ellis
- Department of Anesthesiology, University of California, San Diego, CA
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Van Iterson EH, Cho L, Tonelli A, Finet JE, Laffin LJ. Alveolar Volume Impairment Affects the Prognostic Value of Peak Exercise Oxygen Uptake in Heart Failure With Reduced Ejection Fraction. J Cardiopulm Rehabil Prev 2022; 42:E103-E105. [PMID: 35861950 DOI: 10.1097/hcr.0000000000000702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Erik H Van Iterson
- Section of Preventive Cardiology and Rehabilitation, Robert and Suzanne Tomsich Department of Cardiovascular Medicine, Miller Family Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Leslie Cho
- Section of Preventive Cardiology and Rehabilitation, Robert and Suzanne Tomsich Department of Cardiovascular Medicine, Miller Family Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | | | - J Emanuel Finet
- Section of Heart Failure and Transplantation Medicine, Robert and Suzanne Tomsich Department of Cardiovascular Medicine, Miller Family Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Luke J Laffin
- Section of Preventive Cardiology and Rehabilitation, Robert and Suzanne Tomsich Department of Cardiovascular Medicine, Miller Family Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
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Izadi S, Esmaili S, Emami S, Izadi S, Eskandari M, Yadollahzadeh M, Saleh M, Khavandegar A, Bakhtiyari M. Association between DLCO index and the severity of heart failure: a cross-sectional study. Acta Cardiol 2022; 78:250-255. [PMID: 36082926 DOI: 10.1080/00015385.2022.2066776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
BACKGROUND The prognostic role of diffusing capacity of the lung for carbon monoxide (DLCO) in heart failure has not been thoroughly investigated. Therefore, this study aimed to evaluate DLCO variation in different systolic and diastolic heart failure stages. METHODS This was a prospective cross-sectional study on 51 patients with systolic (reduced LVEF) or diastolic (preserved LVEF) chronic heart failure (CHF). All patients underwent a standard DLCO test. The associations between the severity of heart failure and reduced carbon monoxide transfer factor (TLCO), carbon monoxide transfer coefficient (KCO), and alveolar volume (VA) were investigated. Data were analysed using SPSS software version 16. p-Values below 0.05 were considered statistically significant. RESULTS The mean age of participants was 59.29 ± 14.91 years, with 72% of the study population being male. Systolic heart failure was observed in 47% of patients, diastolic heart failure in 18%, and a mixed systolic and diastolic pattern in 35%. There were significant differences between TLCO percentage in patients with CHF types and the New York Heart Association (NYHA) functional classes (p = 0.042). Overall, an ejection fraction (EF) of less than 25% correlated with 3%, 53%, and 0.78 declines in TLCO, KCO%, and KCO index, respectively. CONCLUSION Despite the lack of statistically significant differences between DLCO indices and CHF severity, decreased DLCO parameters correlated with reduced EF. Therefore, DLCO testing might be helpful to predict HF severity.
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Affiliation(s)
- Shirin Izadi
- Assistant Professor of Pulmonary Disease, Department of Internal Medicine, School of Medicine, Firoozgar General Hospital, Iran University of Medical Sciences
| | - Saeedeh Esmaili
- Residence of Internal Medicine, Firoozgar Medical & Educational Hospital, Department of Internal Medicine, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Sepideh Emami
- Assistant Professor of cardiology, Department of cardiology, School of Medicine, Firoozgar General Hospital, Iran University of Medical Sciences
| | - Shahrokh Izadi
- School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohana Eskandari
- Residence of Internal Medicine, Firoozgar Medical & Educational Hospital, Department of Internal Medicine, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mahdi Yadollahzadeh
- Assistant Professor of Pulmonary Disease, Department of Internal Medicine, School of Medicine, Firoozgar General Hospital, Iran University of Medical Sciences
| | - Maasoumeh Saleh
- Department of Obstetrics and Gynecology, Tehran University of Medical Sciences, Shariati hospital, Tehran, Iran
| | - Armin Khavandegar
- Student Research Committee, Alborz University of Medical Sciences, Karaj, Iran
| | - Mahmood Bakhtiyari
- Non-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
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Singh J, Zaballa K, Kok H, Fitzgerald N, Uy C, Nuth D, Castro C, Irving C, Waters K, Fitzgerald DA. Cheyne-stokes respiration in children with heart failure. Paediatr Respir Rev 2022; 43:78-84. [PMID: 35459626 DOI: 10.1016/j.prrv.2022.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 03/01/2022] [Indexed: 11/30/2022]
Abstract
Cheyne-Stokes respiration (CSA-CSR) is a form of central sleep apnea characterized by alternating periods of hyperventilation and central apneas or hypopneas. CSA-CSR develops following a cardiac insult resulting in a compensatory increase in sympathetic activity, which in susceptible patients causes hyperventilation and destabilizes respiratory control. The physiological changes that occur in CSA-CSR include hyperventilation, a reduced blood gas buffering capacity, and circulatory delay. In adults, 25% to 50% of patients with heart failure are reported to have CSA-CSR. The development of CSA-CSR in this group of patients is considered a poor prognostic sign. The prevalence, progression, and treatment outcomes of CSA-CSR in children remain unclear with only 11 children being described in the literature. The lack of data is possibly not due to the paucity of children with severe heart failure and CSA-CSR but because they may be under-recognized, compounded by the absence of routine polysomnographic assessment of children with moderate to severe heart failure. Building on much broader experience in the diagnosis and management of CSA-CSR in adult sleep medicine and our limited experience in a pediatric quaternary center, this paper will discuss the prevalence of CSA-CSR, its' treatment options, outcomes in children, and the potential future direction for research in this understudied area of pediatric sleep medicine.
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Affiliation(s)
- Jagdev Singh
- Department of Sleep Medicine, The Children's Hospital at Westmead, Sydney, NSW, Australia; Discipline of Child and Adolescent Health, Sydney Medical School, University of Sydney, Sydney, NSW, Australia.
| | - Katrina Zaballa
- Department of Sleep Medicine, The Children's Hospital at Westmead, Sydney, NSW, Australia
| | - Harvey Kok
- Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, NSW, Australia
| | - Nicholas Fitzgerald
- Department of Cardiology, The Children's Hospital at Westmead, Sydney, NSW, Australia; Discipline of Child and Adolescent Health, Sydney Medical School, University of Sydney, Sydney, NSW, Australia
| | - Carla Uy
- Department of Sleep Medicine, The Children's Hospital at Westmead, Sydney, NSW, Australia
| | - Dara Nuth
- Department of Sleep Medicine, The Children's Hospital at Westmead, Sydney, NSW, Australia
| | - Chenda Castro
- Department of Sleep Medicine, The Children's Hospital at Westmead, Sydney, NSW, Australia
| | - Claire Irving
- Department of Cardiology, The Children's Hospital at Westmead, Sydney, NSW, Australia; Discipline of Child and Adolescent Health, Sydney Medical School, University of Sydney, Sydney, NSW, Australia
| | - Karen Waters
- Department of Sleep Medicine, The Children's Hospital at Westmead, Sydney, NSW, Australia; Discipline of Child and Adolescent Health, Sydney Medical School, University of Sydney, Sydney, NSW, Australia
| | - Dominic A Fitzgerald
- Department of Sleep Medicine, The Children's Hospital at Westmead, Sydney, NSW, Australia; Discipline of Child and Adolescent Health, Sydney Medical School, University of Sydney, Sydney, NSW, Australia
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Tsuji M, Amiya E, Bujo C, Hara T, Saito A, Minatsuki S, Maki H, Ishida J, Hosoya Y, Hatano M, Imai H, Nemoto M, Kagami Y, Endo M, Kimura M, Ando M, Shimada S, Kinoshita O, Ono M, Komuro I. Carbon Monoxide Diffusing Capacity Predicts Cardiac Readmission in Patients Undergoing Left Ventricular Assist Device Implantation in Japan. ASAIO J 2021; 67:1111-1118. [PMID: 33470633 DOI: 10.1097/mat.0000000000001363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Carbon monoxide diffusion capacity (DLCO) is impaired in heart failure patients; however, its clinical impact has not been well investigated in the left ventricular assist device (LVAD) population. We explored the predictive value of preoperative DLCO in the survival and cardiac readmission rates after LVAD implantation. Seventy-six patients who received continuous-flow LVAD as bridge-to-transplant therapy from November 2007 to September 2018 and underwent pulmonary function test before LVAD implantation were included. The primary study endpoints were death and readmission for heart failure or arrhythmia (cardiac readmission). Patients were stratified into two groups according to the percent of predicted DLCO (%DLCO). Pulmonary vascular resistance (PVR) was equivocal between the groups preoperatively, whereas the low DLCO group (%DLCO < 80%) showed significantly high PVR postoperatively. The mortality rate was not different between the groups. The 2 year cardiac readmission rate was 33.5% in the low DLCO group and 8.7% in the high DLCO group (%DLCO ≥ 80%) (P = 0.028). The %DLCO was associated with cardiac readmission in univariate and multivariate analyses (hazard ratio: 4.32; 95% CI: 1.50-15.9; P = 0.005). Low %DLCO was associated with high PVR postoperatively and was a risk factor for cardiac readmission after LVAD implantation.
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Affiliation(s)
- Masaki Tsuji
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Eisuke Amiya
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Therapeutic Strategy for Heart Failure, The University of Tokyo, Tokyo, Japan
| | - Chie Bujo
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Toru Hara
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Akihito Saito
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shun Minatsuki
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hisataka Maki
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Junichi Ishida
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yumiko Hosoya
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Therapeutic Strategy for Heart Failure, The University of Tokyo, Tokyo, Japan
| | - Masaru Hatano
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Therapeutic Strategy for Heart Failure, The University of Tokyo, Tokyo, Japan
| | - Hiroko Imai
- Department of Organ Transplantation, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mariko Nemoto
- Department of Organ Transplantation, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yukie Kagami
- Department of Organ Transplantation, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Miyoko Endo
- Department of Organ Transplantation, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mitsutoshi Kimura
- Department of Cardiac Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Masahiko Ando
- Department of Cardiac Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shogo Shimada
- Department of Cardiac Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Osamu Kinoshita
- Department of Cardiac Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Minoru Ono
- Department of Cardiac Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Issei Komuro
- From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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11
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Risom EC, Buggeskov KB, Petersen RH, Mortensen J, Ravn HB. Influence of reduced diffusing capacity and FEV 1 on outcome after cardiac surgery. Acta Anaesthesiol Scand 2021; 65:1221-1228. [PMID: 34089538 DOI: 10.1111/aas.13935] [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: 02/15/2021] [Revised: 05/19/2021] [Accepted: 05/20/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Impaired lung function is a well-known risk factor in cardiac surgery patients and reduced forced expiratory volume in 1 second (FEV1 ) is associated with increased mortality. However, there is limited knowledge regarding the influence of impaired diffusing capacity of the lungs for carbon monoxide (DLCO) in unselected cardiac surgery patients. The aim of this study was to investigate the association of impaired DLCO and/or reduced FEV1 on post-operative mortality and morbidity in cardiac surgery patients. METHODS In a prospective cohort study, 390 patients scheduled for elective cardiac surgery underwent preoperative lung function test including spirometry and DLCO measurements. We defined reduced FEV1 as FEV1 below lower limit of normal (LLN) and impaired DLCO as DLCO <60% of predicted. RESULTS Mortality within 1 year (90-570 days) was significantly higher in patients with impaired DLCO (12% vs 3%, P = .010) and with reduced FEV1 (9% vs 3%, P = .028). Mortality was higher in patients with impaired DLCO both in the presence and absence of FEV1 < LLN. In multivariate analysis, only impaired DLCO [OR: 3.3, 95% confidence interval (CI) 1.4-7.5; P = .005] and age (OR: 1.1 per year, 95% CI 1.0-1.2; P = .001) were independent predictors of the combined outcome of mortality and prolonged intensive care unit (ICU) stay. Impaired DLCO was also associated with post-operative respiratory complications. CONCLUSION In patients undergoing elective cardiac surgery, preoperative impaired FEV1 and DLCO were associated with increased mortality and morbidity. In multivariate analysis, only DLCO and age were independent predictors of a combined outcome of mortality and prolonged ICU stay.
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Affiliation(s)
- Emilie C. Risom
- Department of Cardiothoracic Anaesthesiology Rigshospitalet, Copenhagen University Hospital Copenhagen Denmark
| | - Katrine B. Buggeskov
- Department of Cardiothoracic Anaesthesiology Rigshospitalet, Copenhagen University Hospital Copenhagen Denmark
| | - René H. Petersen
- Department of Cardiothoracic Surgery Rigshospitalet, Copenhagen University Hospital Copenhagen Denmark
| | - Jann Mortensen
- Department of Clinical Physiology Nuclear Medicine & PET, Rigshospitalet, Copenhagen University Hospital Copenhagen Denmark
| | - Hanne B. Ravn
- Department of Cardiothoracic Anaesthesiology Rigshospitalet, Copenhagen University Hospital Copenhagen Denmark
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12
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Variability in pulmonary diffusing capacity in heart failure. Respir Physiol Neurobiol 2020; 280:103473. [DOI: 10.1016/j.resp.2020.103473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/29/2020] [Accepted: 06/01/2020] [Indexed: 11/22/2022]
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13
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Wijnant SRA, De Roos E, Kavousi M, Stricker BH, Terzikhan N, Lahousse L, Brusselle GG. Trajectory and mortality of preserved ratio impaired spirometry: the Rotterdam Study. Eur Respir J 2020; 55:13993003.01217-2019. [PMID: 31601717 DOI: 10.1183/13993003.01217-2019] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 09/20/2019] [Indexed: 11/05/2022]
Abstract
Preserved ratio impaired spirometry (PRISm) is a heterogeneous condition but its course and disease progression remain to be elucidated. We aimed to examine its prevalence, trajectories and prognosis in the general population.In the Rotterdam Study (population-based prospective cohort) we examined prevalence, trajectories and prognosis of subjects with normal spirometry (controls; forced expiratory volume in 1 s (FEV1)/forced vital capacity (FVC) ≥0.7, FEV1 ≥80%), PRISm (FEV1/FVC ≥0.7, FEV1 <80%) and chronic obstructive pulmonary disease (COPD) (FEV1/FVC <0.7) at two study visits. Hazard ratios with 95% confidence intervals for mortality (until December 30, 2018) were adjusted for age, sex, body mass index, current smoking and pack-years.Of 5487 subjects (age 69.1±8.9 years; 7.1% PRISm), 1603 were re-examined after 4.5 years. Of the re-examined PRISm subjects, 15.7% transitioned to normal spirometry and 49.4% to COPD. Median lung function decline was highest in subjects with incident PRISm (FEV1 -92.8 mL·year-1, interquartile range (IQR) -131.9- -65.8 mL·year-1; FVC -93.3 mL·year-1, IQR -159.8- -49.1 mL·year-1), but similar in persistent PRISm (FEV1 -30.2 mL·year-1, IQR -67.9- -7.5 mL·year-1; FVC -20.1 mL·year-1, IQR -47.7-21.7 mL·year-1) and persistent controls (FEV1 -39.6 mL·year-1, IQR -64.3--12.7 mL·year-1; FVC -20.0 mL·year-1, IQR -55.4-18.8 mL·year-1). Of 5459 subjects with informed consent for follow-up, 692 (12.7%) died during 9.3 years (maximum) follow-up: 10.3% of controls, 18.7% of PRISm subjects and 20.8% of COPD subjects. Relative to controls, subjects with PRISm and COPD Global Initiative for Chronic Obstructive Lung Disease (GOLD) 2-4 had increased all-cause mortality (PRISm: HR 1.6, 95% CI 1.2-2.0; COPD GOLD 2-4: HR 1.7, 95% CI 1.4-2.1) and cardiovascular mortality (PRISm: HR 2.8, 95% CI 1.5-5.1; COPD 2-4: HR 2.1, 95% CI 1.2-3.6). Mortality within <1 year was highest in PRISm, with patients often having cardiovascular comorbidities (heart failure or coronary heart disease; 70.0%).PRISm is associated with increased mortality and this population encompasses at least three distinct subsets: one that develops COPD during follow-up, a second with high cardiovascular burden and early mortality, and a third with persistent PRISm and normal age-related lung function decline.
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Affiliation(s)
- Sara Renata Alex Wijnant
- Dept of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium.,Dept of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.,Dept of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Emmely De Roos
- Dept of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium.,Dept of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Maryam Kavousi
- Dept of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Bruno Hugo Stricker
- Dept of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.,Dept of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Natalie Terzikhan
- Dept of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Lies Lahousse
- Dept of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.,Dept of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,Both authors contributed equally
| | - Guy G Brusselle
- Dept of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium .,Dept of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.,Dept of Respiratory Medicine, Erasmus Medical Center, Rotterdam, The Netherlands.,Both authors contributed equally
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14
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Koshy A, Green T, Toms A, Cassidy S, Schueler S, Jakovljevic D, MacGowan GA. The role of exercise hemodynamics in assessing patients with chronic heart failure and left ventricular assist devices. Expert Rev Med Devices 2019; 16:891-898. [PMID: 31584302 DOI: 10.1080/17434440.2019.1675506] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Introduction: Chronic heart failure is characterized by reduced exercise capacity. Invasive exercise hemodynamics are not routinely performed unless patients undergo transplant or left ventricular assist devices (LVAD) assessment, though now with readily available noninvasive devices, exercise hemodynamics are easily obtained. Our contention is that this is a valuable opportunity to acquire a more accurate measure of cardiac status in heart failure. Exercise hemodynamic measures such as cardiac power output can be carried out cheaply and effectively. Recent studies have highlighted the added value of exercise hemodynamics in prognostication of heart failure, and their role in assessing myocardial recovery in LVADs. Areas covered: In this review, we explore the literature available on Medline until 2019 focusing on resting and exercise hemodynamics alongside the methods of assessment (invasive and noninvasive) in heart failure with reduced ejection fraction and patients with implanted LVADs. Expert opinion: Hemodynamics measured both at rest and exercise are expected to play a significant role in the work up of transplant and LVAD patients. Furthermore, there is the potential to utilize noninvasive assessment in a complimentary fashion to support patient selection and improve the monitoring of response to treatment across the full cohort of heart failure patients.
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Affiliation(s)
- Aaron Koshy
- Institute of Cellular and Genetic Medicine, Cardiovascular Research Centre, Faculty of Medical Sciences, Newcastle University, and Newcastle upon Tyne Hospitals , Newcastle upon Tyne , UK
| | - Thomas Green
- Cardiothoracic Centre, Freeman Hospital , Newcastle upon Tyne , UK
| | - Anet Toms
- Institute of Cellular and Genetic Medicine, Cardiovascular Research Centre, Faculty of Medical Sciences, Newcastle University, and Newcastle upon Tyne Hospitals , Newcastle upon Tyne , UK
| | - Sophie Cassidy
- Institute of Cellular and Genetic Medicine, Cardiovascular Research Centre, Faculty of Medical Sciences, Newcastle University, and Newcastle upon Tyne Hospitals , Newcastle upon Tyne , UK
| | - Stephan Schueler
- Cardiothoracic Centre, Freeman Hospital , Newcastle upon Tyne , UK
| | | | - Guy A MacGowan
- Institute of Cellular and Genetic Medicine, Cardiovascular Research Centre, Faculty of Medical Sciences, Newcastle University, and Newcastle upon Tyne Hospitals , Newcastle upon Tyne , UK.,Cardiothoracic Centre, Freeman Hospital , Newcastle upon Tyne , UK
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15
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Deis T, Balling L, Rossing K, Wolsk E, Perch M, Gustafsson F. Lung diffusion capacity in advanced heart failure: relation to central haemodynamics and outcome. ESC Heart Fail 2019; 6:379-387. [PMID: 30784223 PMCID: PMC6437433 DOI: 10.1002/ehf2.12401] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 12/10/2018] [Indexed: 11/09/2022] Open
Abstract
Aims Patients with heart failure (HF) are known to have a reduced pulmonary diffusion capacity for carbon monoxide (DLCO), but little is known about how lung function relates to central haemodynamics. The aim of this study was to investigate the association between haemodynamic variables and pulmonary diffusion capacity adjusted for alveolar volume in congestive HF patients and to analyse how predicted DLCO/VA affects mortality in relation to the haemodynamic status. Methods and results We retrospectively studied right heart catheterization (RHC) and lung function data on 262 HF patients (mean age 51 ± 13 years) with a left ventricular ejection fraction < 45% referred non‐urgently for evaluation for heart transplantation (HTX) or left ventricular assist device (LVAD). Univariate and multivariate linear regression models were constructed to examine the associations between predicted values of DLCO/VA, forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1), and haemodynamic parameters [pulmonary capillary wedge pressure (PCWP), central venous pressure, cardiac index, mean pulmonary artery pressure, and mean arterial pressure] as well as other factors known to affect lung function in HF. FEV1 was reduced to <80% of predicted value in 55% of the population, and DLCO/VA was reduced in 63% of the population. DLCO/VA correlated positively with pulmonary capillary wedge pressure in both univariate and multivariate analyses for all included patients (P < 0.001 and P = 0.045, respectively) and a restricted population of patients with the shortest time between RHC and lung function testing (P = 0.005, P = 0.015). DLCO/VA predicted mortality in multivariate models [hazard ratio 1.5 (1.1–2.1)] but not the combined endpoint of death, LVAD implantation, or HTX. There was no significant correlation between haemodynamics and predicted FVC or FEV1. Conclusions Pulmonary diffusion capacity correlates positively with left ventricular fillings pressures, and reduced values predict increased mortality in patients with HF. This might be driven by increased lung capillary volume in patients with pulmonary congestion.
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Affiliation(s)
- Tania Deis
- Department of Cardiology, Rigshospitalet, 2142, 9 Blegdamsvej, DK-2100, Copenhagen, Denmark
| | - Louise Balling
- Department of Cardiology, Rigshospitalet, 2142, 9 Blegdamsvej, DK-2100, Copenhagen, Denmark
| | - Kasper Rossing
- Department of Cardiology, Rigshospitalet, 2142, 9 Blegdamsvej, DK-2100, Copenhagen, Denmark
| | - Emil Wolsk
- Department of Cardiology, Rigshospitalet, 2142, 9 Blegdamsvej, DK-2100, Copenhagen, Denmark
| | - Michael Perch
- Department of Cardiology, Rigshospitalet, 2142, 9 Blegdamsvej, DK-2100, Copenhagen, Denmark.,Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Finn Gustafsson
- Department of Cardiology, Rigshospitalet, 2142, 9 Blegdamsvej, DK-2100, Copenhagen, Denmark
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