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Kang S, Chae YJ, Park SK, Kim TG, Joe HB. Prevention of Bradycardia during Spinal Anesthesia under Dexmedetomidine Sedation in Older Adults. J Clin Med 2022; 11:jcm11216349. [PMID: 36362576 PMCID: PMC9657617 DOI: 10.3390/jcm11216349] [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: 09/22/2022] [Revised: 10/11/2022] [Accepted: 10/26/2022] [Indexed: 11/16/2022] Open
Abstract
Older adults exhibit reduced physiological responses to beta-adrenergic stimulation and parasympathetic inhibition. This study aimed to investigate the effect of reducing the incidence of bradycardia in the atropine and ephedrine pretreatment group compared to the control group in older adults who received spinal anesthesia with intravenous dexmedetomidine. Overall, 102 older adults aged over 65 years were randomly divided into three groups, and saline (control group), atropine at 0.5 mg (atropine group), and ephedrine at 8 mg (ephedrine group) were administered intravenously to each group as pretreatment. Immediately after spinal anesthesia, dexmedetomidine loading and study drug injections were commenced. The primary outcome was the incidence of bradycardia (<50 beats per min) within 60 min following dexmedetomidine loading. The incidence of bradycardia requiring atropine treatment was significantly higher in the control group than in the atropine and ephedrine groups (27.3% vs. 6.1% and 8.8%, respectively; p = 0.035), and no difference was noted between the atropine and ephedrine groups. Therefore, if ephedrine or atropine is selected and used according to the patient’s condition and clinical situation, it may be helpful in preventing bradycardia during spinal anesthesia using dexmedetomidine in older patients.
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Affiliation(s)
- Seyoon Kang
- Department of Anesthesiology and Pain Medicine, Ajou University School of Medicine, Suwon 16499, Korea
| | - Yun Jeong Chae
- Department of Anesthesiology and Pain Medicine, Ajou University School of Medicine, Suwon 16499, Korea
| | - Sun Kyung Park
- Department of Anesthesiology and Pain Medicine, Jeju National College of Medicine, Jeju 63241, Korea
| | - Taek Geun Kim
- Department of Anesthesiology and Pain Medicine, Ajou University School of Medicine, Suwon 16499, Korea
| | - Han Bum Joe
- Department of Anesthesiology and Pain Medicine, Ajou University School of Medicine, Suwon 16499, Korea
- Correspondence: ; Tel.: +82-31-219-4916
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Yang H, Deng HM, Chen HY, Tang SH, Deng F, Lu YG, Song JC. The Impact of Age on Propofol Requirement for Inducing Loss of Consciousness in Elderly Surgical Patients. Front Pharmacol 2022; 13:739552. [PMID: 35418861 PMCID: PMC8996377 DOI: 10.3389/fphar.2022.739552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 03/09/2022] [Indexed: 11/28/2022] Open
Abstract
It is generally accepted that geriatric patients are more sensitive to propofol than adults; thus, a dose-adjusted propofol is recommended for these patients during the induction of anesthesia. However, for patients aged 75 years and over, established guidelines for propofol induction doses do not provide dose references. To this end, we observed 80 surgical patients (female 39, male 41, American Society of Anesthesiologists physical status score I ∼ II) to access the appropriate dose of propofol for inducing loss of consciousness (LOC). Accordingly, patients were subdivided into group A (20 patients, 45–64 years), group B (20 patients, 65–74 years), group C (20 patients, 75–84 years), and group D (20 patients, ≥ 85 years). All patients received propofol (at a rate of 0.3 mg/kg/min) alone for inducing LOC, which was defined by loss of both eyelash reflex and verbal response. Compared with group A, the propofol requirement for LOC in Group B, C and D decreased by 14.8, 25.2 and 38.5%, respectively. Bivariate linear correlation analysis showed that propofol requirement was negatively correlated with age. After adjusting for potential confounders, age was still an independent factor affecting propofol requirement. In conclusion, the propofol requirement for inducing LOC decreased significantly in elderly patients. We demonstrated that age was an independent factor impacting propofol requirement for LOC during the induction of general anesthesia, implying that the propofol dose for anesthesia induction should be further reduced in elderly surgical patients, especially those aged 75 years and over.
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Affiliation(s)
- Hua Yang
- Department of Anesthesiology, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, China
| | - Hui-Min Deng
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hai-Yan Chen
- Department of Anesthesiology, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, China
| | - Shu-Heng Tang
- Department of Anesthesiology, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, China
| | - Fang Deng
- Department of Anesthesiology, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, China
| | - Yu-Gang Lu
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Jin-Chao Song
- Department of Anesthesiology, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, China
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Klose P, Lorenzen U, Berndt R, Borzikowsky C, Hill M, Gruenewald M, Elke G, Renner J. Continuous noninvasive monitoring of arterial pressure using the vascular unloading technique in comparison to the invasive gold standard in elderly comorbid patients: A prospective observational study. Health Sci Rep 2020; 3:e204. [PMID: 33204849 PMCID: PMC7654630 DOI: 10.1002/hsr2.204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/09/2020] [Accepted: 10/13/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND AND AIMS Elderly patients aged ≥65 years represent a growing population in the perioperative field, particularly orthopedic and vascular surgery. The higher degree of age-related or comorbid-dependent vascular alterations renders these patients at risk for hemodynamic complications and likely denote a possible limitation for modern, non-invasive arterial pressure monitoring devices. The aim was to compare vascular unloading technique-derived to invasive measurements of systolic (SAP), diastolic (DAP), and mean arterial pressure (MAP) in elderly perioperative patients. METHODS This prospective observational study included patients aged ≥65 years scheduled for orthopedic and patients ≥50 years with peripheral artery disease Fontaine stage ≥ II scheduled for vascular surgery, respectively. Invasive radial artery and non-invasive finger-cuff (Nexfin system) arterial pressures were recorded before and after induction of general anesthesia and during surgery. Correlation, Bland-Altman, and concordance analyses were performed. Measurements of arterial pressure were also compared during intraoperative hypotension (MAP <70 mm Hg) and hypertension (MAP >105 mm Hg). RESULTS Sixty patients with orthopedic (N = 25, mean (SD) age 77 (5) years) and vascular surgery (N = 35, age 69 [10] years) were enrolled. Seven hundred data pairs of all patients were analysed and pooled bias and percentage error were: SAP: 14.43 mm Hg, 43.79%; DAP: -2.40 mm Hg, 53.78% and MAP: 1.73 mm Hg, 45.05%. Concordance rates were 84.01% for SAP, 77.87% for DAP, and 86.47% for MAP. Predefined criteria for interchangeability of absolute and trending values could neither be reached in the overall nor in the subgroup analyses orthopedic vs vascular surgery. During hypertension, percentage error was found to be lowest for all pressure values, still not reaching predefined criteria. CONCLUSION Arterial pressure monitoring with the vascular unloading technique did not reach criteria of interchangeability for absolute and trending values. Nevertheless, the putatively beneficial use of noninvasive arterial pressure measurements should be further evaluated in the elderly perioperative patient.
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Affiliation(s)
- Phil Klose
- Department of Anaesthesiology and Intensive Care MedicineUniversity Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Ulf Lorenzen
- Department of Anaesthesiology and Intensive Care MedicineUniversity Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Rouven Berndt
- Department of Cardiovascular SurgeryUniversity Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Christoph Borzikowsky
- Institute of Medical Informatics and StatisticsChristian‐Albrechts‐University Kiel, University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Moritz Hill
- Department of Anaesthesiology and Intensive Care MedicineUniversity Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Matthias Gruenewald
- Department of Anaesthesiology and Intensive Care MedicineUniversity Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Gunnar Elke
- Department of Anaesthesiology and Intensive Care MedicineUniversity Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Jochen Renner
- Department of AnesthesiologyHelios Kliniken SchwerinSchwerinGermany
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Liu Y, Su M, Li W, Yuan H, Yang C. Comparison of general anesthesia with endotracheal intubation, combined spinal-epidural anesthesia, and general anesthesia with laryngeal mask airway and nerve block for intertrochanteric fracture surgeries in elderly patients: a retrospective cohort study. BMC Anesthesiol 2019; 19:230. [PMID: 31847846 PMCID: PMC6916001 DOI: 10.1186/s12871-019-0908-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 12/08/2019] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND There is no consensus on the optimal anesthesia method for intertrochanteric fracture surgeries in elderly patients. Our study aimed to compare the hemodynamics and perioperative outcomes of general anesthesia with endotracheal intubation, combined spinal-epidural anesthesia, and general anesthesia with laryngeal mask airway (LMA) and nerve block for intertrochanteric fracture surgeries in elderly patients. METHODS This is a retrospective study of 75 patients aged > 60 years scheduled for intertrochanteric fracture surgeries with general anesthesia with intubation (n = 25), combined spinal-epidural anesthesia (n = 25), and general anesthesia with LMA and nerve block (n = 25). The intraoperative hemodynamics were recorded, and the maximum variation rate was calculated. Postoperative analgesic effect was evaluated using the visual analog scale (VAS). Postoperative cognitive status was assessed using the Mini-Mental State Exam (MMSE). RESULTS The maximum variation rate of intraoperative heart rate, systolic blood pressure, diastolic blood pressure differed significantly between the three groups (general anesthesia with intubation > combined spinal-epidural anesthesia > general anesthesia with LMA and nerve block). The VAS scores postoperative 2 h, 4 h, 6 h, and 8 h also differed significantly between the three groups (general anesthesia with intubation > combined spinal-epidural anesthesia > general anesthesia with LMA and nerve block). The VAS scores postoperative 24 h were significantly lower in the general anesthesia with LMA/nerve block group than the general anesthesia with intubation group and the combined spinal-epidural anesthesia group. The MMSE scores postoperative 15 min and 45 min differed significantly between the three groups (general anesthesia with intubation < combined spinal-epidural anesthesia < general anesthesia with LMA and nerve block). The MMSE scores postoperative 120 min in the general anesthesia with intubation group were the lowest among the three groups. There was no significant difference in the incidence of respiratory infection postoperative 24 h, 48 h, and 72 h between the three groups. CONCLUSION Compared to general anesthesia with intubation and combined spinal-epidural anesthesia, general anesthesia with LMA and nerve block had better postoperative analgesic effect and less disturbances on intraoperative hemodynamics and postoperative cognition for elderly patients undergoing intertrochanteric fracture surgeries.
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Affiliation(s)
- Yang Liu
- Department of Orthopedics, Chengdu Aerospace Hospital, Chengdu, 610100, China
| | - Mang Su
- Department of Anesthesia, Chengdu Aerospace Hospital, Chengdu, 610100, China
| | - Wei Li
- Department of Orthopedics, Chengdu Aerospace Hospital, Chengdu, 610100, China
| | - Hao Yuan
- Department of Orthopedics, Chengdu Aerospace Hospital, Chengdu, 610100, China
| | - Cheng Yang
- Department of Orthopedics, Chengdu Aerospace Hospital, Chengdu, 610100, China.
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McCallinhart PE, Sunyecz IL, Trask AJ. Coronary Microvascular Remodeling in Type 2 Diabetes: Synonymous With Early Aging? Front Physiol 2018; 9:1463. [PMID: 30374313 PMCID: PMC6196247 DOI: 10.3389/fphys.2018.01463] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 09/27/2018] [Indexed: 12/31/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) is suggested to cause an "early vascular aging" phenomenon that is associated with vascular dysfunction, remodeling, and adverse alterations in vascular stiffness. Given that both T2DM and aging are prominent risk factors for cardiovascular disease, the aim of this study was to test the hypothesis that coronary resistance microvessel (CRM) remodeling and impairments in flow occur in the compound setting of T2DM and aging. Normal heterozygous Db/db controls and homozygous db/db mice were aged to 16 (young) or 36 (aged) weeks for all experiments and passive pressure myography and echocardiography were used to assess vascular mechanics, and structure. CRM wall thickness was significantly increased at each pressure in aged control mice compared to young control mice (9.4 ± 0.6 vs. 6.8 ± 0.2 μm, respectively, p < 0.001); however, there were no significant differences in CRM wall thickness of aged db/db mice vs. young db/db mice. Aged control mice had a higher medial CSA compared to young control mice (3847 ± 303 vs. 2715 ± 170 μm2, p < 0.01); however, there were no significant differences in medial CSA of aged db/db mice vs. young db/db mice. Elastic modulus was lower in aged control CRMs vs. young control CRMs (3.5x106± 0.7 × 106 vs. 8.7 × 106± 0.6 × 106, p < 0.0001). Elastic modulus remained the same in young db/db mice vs. aged db/db mice. These data show that the diabetic CRMs undergo adverse remodeling at an early age, similar to normal aged CRMs, that persists toward senescence, and it further suggests that diabetic CRMs are subject to an early aging phenomenon.
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Affiliation(s)
- Patricia E McCallinhart
- Center for Cardiovascular Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, United States.,The Heart Center, Nationwide Children's Hospital, Columbus, OH, United States
| | - Ian L Sunyecz
- Center for Cardiovascular Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, United States.,The Heart Center, Nationwide Children's Hospital, Columbus, OH, United States
| | - Aaron J Trask
- Center for Cardiovascular Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, United States.,The Heart Center, Nationwide Children's Hospital, Columbus, OH, United States.,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, United States
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Gomez-Marcos MA, Martinez-Salgado C, Gonzalez-Sarmiento R, Hernandez-Rivas JM, Sanchez-Fernandez PL, Recio-Rodriguez JI, Rodriguez-Sanchez E, García-Ortiz L. Association between different risk factors and vascular accelerated ageing (EVA study): study protocol for a cross-sectional, descriptive observational study. BMJ Open 2016; 6:e011031. [PMID: 27267107 PMCID: PMC4908886 DOI: 10.1136/bmjopen-2016-011031] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Revised: 04/19/2016] [Accepted: 05/13/2016] [Indexed: 12/19/2022] Open
Abstract
INTRODUCTION The process of population ageing that is occurring in developed societies represents a major challenge for the health system. The aim of this study is to analyse factors that have an influence on early vascular ageing (EVA), estimated by carotid-femoral pulse wave velocity (cf-PWV) and Cardio Ankle Vascular Index (CAVI), and to determine differences by gender in a Spanish population. METHODS AND ANALYSIS An observational, descriptive, cross-sectional study. STUDY POPULATION From the population assigned to the participating healthcare centres, a cluster random sampling stratified by age and gender will be performed to obtain 500 participants aged between 35 and 75. Those who meet the inclusion criteria and give written informed consent will be included in the study. MEASUREMENTS Main dependent variables: cf-PWV determined using the SphygmoCor System and CAVI estimated using VASERA. Secondary dependent variables: telomere length, carotid intima-media thickness, central and peripheral augmentation index, ankle-brachial pulse wave velocity, ankle-brachial index, retinal arteriovenous index, and renal and cardiac organ damage. INDEPENDENT VARIABLES lifestyles (physical activity, adherence to the Mediterranean diet, alcohol and tobacco consumption); psychological factors (depression, anxiety and chronic stress); inflammatory factors and oxidative stress. ETHICS AND DISSEMINATION The study has been approved by the clinical research ethics committee of the healthcare area of Salamanca. All study participants will sign an informed consent form agreeing to participate in the study in compliance with the Declaration of Helsinki and the WHO standards for observational studies. The results of this study will allow the understanding of the relationship of the different influencing factors and their relative weight in the development of EVA. At least 5 publications in first-quartile scientific journals are planned. TRIAL REGISTRATION NUMBER NCT02623894; Pre-results.
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Affiliation(s)
- Manuel A Gomez-Marcos
- Primary Care Research Unit, Instituto of Investigación Biomédica of Salamanca (IBSAL), The Alamedilla Health Center, Castilla and León Health Service–SACYL, Salamanca, Castile and León, Spain
- Department of Medicine, REDIAPP, University of Salamanca, Salamanca, Castile and León, Spain
| | - Carlos Martinez-Salgado
- Unit Renal Physiology and Pathophysiology Cardiovascular Unit, Department of Physiology and Pharmacology, IBSAL, Queen Sofia Institute of Nephrology Research, University of Salamanca, Salamanca, Castile and León, Spain
| | - Rogelio Gonzalez-Sarmiento
- IBSAL and Instituto of Biología Molecular and Celular of Cáncer (IBMCC), University of Salamanca–SACYL, Salamanca, Castile and León, Spain
- Department of Medicine, University of Salamanca, Castile and León, Spain
| | - Jesus Ma Hernandez-Rivas
- IBSAL, IBMCC, Cancer Research Center, University of Salamanca, CSIC, University Hospital of Salamanca, Salamanca, Castile and León, Spain
- Department of Hematology, University of Salamanca, Salamanca, Castile and León, Spain
- Department of Medicine, University of Salamanca, Salamanca, Castile and León, Spain
| | - Pedro L Sanchez-Fernandez
- IBSAL, University Hospital of Salamanca, Salamanca, Castile and León, Spain
- Cardiology Department, University of Salamanca, Salamanca, Castile and León, Spain
| | - Jose I Recio-Rodriguez
- Primary Care Research Unit, IBSAL, The Alamedilla Health Center, Castilla and León Health Service–SACYL, REDIAPP, Salamanca, Castile and León, Spain
| | - Emiliano Rodriguez-Sanchez
- Primary Care Research Unit, Instituto of Investigación Biomédica of Salamanca (IBSAL), The Alamedilla Health Center, Castilla and León Health Service–SACYL, Salamanca, Castile and León, Spain
- Department of Medicine, REDIAPP, University of Salamanca, Salamanca, Castile and León, Spain
| | - Luis García-Ortiz
- Primary Care Research Unit, BSAL, The Alamedilla Health Center, Castilla and León Health Service–SACYL, Salamanca, Castile and León, Spain
- Biomedical and Diagnostic Sciences Department, REDIAPP, University of Salamanca, Salamanca, Castile and León, Spain
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Abstract
Cardiovascular diseases have become a major cause of morbidity and mortality and are likely to only increase as the geriatric population continues to grow. Much is already known about the basic risk factors associated with vascular aging, but there is a new direction of investigation into the health and viability of the endothelium at a biochemical level. As we continue to shift much of our health care focus into prevention tactics and techniques, slowing or reversing the aging process of the vascular system could have a profound impact on our aging population.
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Gragasin FS, Bourque SL, Davidge ST. Propofol increases vascular relaxation in aging rats chronically treated with the angiotensin-converting enzyme inhibitor captopril. Anesth Analg 2013; 116:775-83. [PMID: 23429803 DOI: 10.1213/ane.0b013e3182825fbf] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Both propofol use and advanced age are predictors of intraoperative hypotension. We previously demonstrated that propofol enhances vasodilation in mesenteric arteries from aged rats, partly due to increased nitric oxide (NO) bioavailability. Patients chronically treated with angiotensin-converting enzyme (ACE) inhibitors may exhibit refractory hypotension under general anesthesia. We hypothesized that propofol enhances NO-mediated vasodilation in arteries from aged rats chronically treated with ACE inhibitors. METHODS Sprague-Dawley rats aged 12 to 13 months were treated with or without captopril for 7 to 8 weeks, yielding a final age of 14 to 15 months at the time of experimentation. Before euthanasia, arterial blood pressures were obtained through carotid artery cannulation. Concentration-response curves to propofol (0.1-100 µM) or methacholine (MCh) (0.01-3 µM) were then assessed on isolated resistance mesenteric arteries (100-200 μm diameter) from both treatment (captopril) and control rats. MCh relaxation was also assessed after propofol pretreatment (1 and 10 µM). N(G)-nitro-l-arginine methyl ester (l-NAME) (100 µM) and meclofenamate (10 µM) were used to inhibit NO and prostaglandin synthesis, respectively. Concentration-response data were summarized as 50% of the maximum relaxation response or area under the curve. RESULTS Mean arterial blood pressure in the captopril-treated rats was lower than in untreated rats (P = 0.049). When comparing relaxation in arteries from captopril-treated versus untreated rats, concentration-response curves revealed that captopril-treated rats display greater direct propofol relaxation (P = 0.018). MCh relaxation in the absence of propofol, however, was not different between captopril-treated and untreated rats (P = 0.80). Propofol pretreatment increased MCh relaxation in arteries from captopril-treated compared with untreated rats (P = 0.029 for 1 µM and P = 0.020 for 10 µM). Meclofenamate did not have an effect in this response (P = 0.22). l-NAME-dependent inhibition of MCh relaxation, however, was greater in arteries from control compared with captopril-treated rats (P = 0.0077). However, propofol increased the proportion of NO-dependent vasodilation to MCh similarly in both groups. This suggests that other vasodilatory pathways are involved in the differential response to MCh in the presence of propofol in captopril-treated rats. CONCLUSIONS Our results show that mesenteric arterial relaxation in response to propofol, both by direct stimulation and through modulation of endothelium-dependent mechanisms, is, in part, NO-dependent. In captopril-treated rats, propofol further increased arterial relaxation through a non-NO-dependent vasodilating pathway (e.g., endothelium-derived hyperpolarizing factor), which may account for enhanced vasodilation during propofol exposure in patients treated with ACE inhibitors.
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Affiliation(s)
- Ferrante S Gragasin
- FRCPC, Department of Anesthesiology and Pain Medicine, University of Alberta, 8-120 Clinical Science Building, 8440-112 St., Edmonton, Alberta, Canada T6G 2G3.
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Dantas AP, Jiménez-Altayó F, Vila E. Vascular aging: facts and factors. Front Physiol 2012; 3:325. [PMID: 22934073 PMCID: PMC3429093 DOI: 10.3389/fphys.2012.00325] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 07/24/2012] [Indexed: 11/17/2022] Open
Affiliation(s)
- Ana P Dantas
- Institut Clínic del Tòrax, Institut d'Investigacions Biomèdiques August Pi i Sunyer Barcelona, Spain
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