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Wu HD, Yang LW, Deng DY, Jiang RN, Song ZK, Zhou LT. The effects of brominated flame retardants (BFRs) on pro-atherosclerosis mechanisms. Ecotoxicol Environ Saf 2023; 262:115325. [PMID: 37544066 DOI: 10.1016/j.ecoenv.2023.115325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 07/24/2023] [Accepted: 08/01/2023] [Indexed: 08/08/2023]
Abstract
Brominated flame-retardants (BFRs) are environmental endocrine disruptors, comprising several pollutants, which potentially affect the endocrine system and cause dysfunction and disease. Widespread BFR exposure may cause multisystem toxicity, including cardiovascular toxicity in some individuals. Studies have shown that BFRs not only increase heart rate, induce arrhythmia and cardiac hypertrophy, but also cause glycolipid metabolism disorders, vascular endothelial dysfunction, and inflammatory responses, all of which potentially induce pre-pathological changes in atherosclerosis. Experimental data indicated that BFRs disrupt gene expression or signaling pathways, which cause vascular endothelial dysfunction, lipid metabolism-related disease, inflammation, and possibly atherosclerosis. Considerable evidence now suggests that BFR exposure may be a pro-atherosclerotic risk factor. In this study, we reviewed putative BFR effects underpinning pro-atherosclerosis mechanisms, and focused on vascular endothelial cell dysfunction, abnormal lipid metabolism, pro-inflammatory cytokine production and foam cell formation. Consequently, we proposed a scientific basis for preventing atherosclerosis by BFRs and provided concepts for further research.
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Affiliation(s)
- Hai-Di Wu
- Department of Cardiology, The First Hospital of Jilin University, Changchun 130021, China
| | - Li-Wei Yang
- School of Public Health, Jilin University, Changchun 130021, China
| | - Da-Yong Deng
- Department of Radiology, Jilin Provincial Cancer Hospital, 1066 Jinhu Road, 130000 Changchun, China
| | - Rong-Na Jiang
- Department of Intensive Care Unit, Jilin Provincial Cancer Hospital, 1066 Jinhu Road, 130000 Changchun, China
| | - Zi-Kai Song
- Department of Cardiology, The First Hospital of Jilin University, Changchun 130021, China.
| | - Li-Ting Zhou
- School of Public Health, Jilin University, Changchun 130021, China.
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Cao HY, Wu HD, Song ZK, Tang ML, Yang S, Liu Y, Qin L. Higher than recommend dosage of sublingual isosorbide dinitrate for treating angina pectoris: a case report and review of the literature. Pan Afr Med J 2021; 39:28. [PMID: 34394819 PMCID: PMC8348259 DOI: 10.11604/pamj.2021.39.28.22180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 03/27/2020] [Indexed: 12/01/2022] Open
Abstract
Nitrates primarily cause arterial and venous vasodilation effects, which increases coronary artery blood supply, and decreases cardiac preload and afterload by enhancing nitric oxide (NO) levels. The dosage of nitrates used for angina pectoris widely differs among individuals, and therapeutic resistance and tolerance gradually occur. Increasing doses of nitrates are needed to abolish ischemia chest pain onset in patients with angina pectoris, and to obtain satisfactory therapeutic effects. Here, we report the case of a 37-year-old male who was hospitalized six times, from September 2013 to April 2018, with recurrent angina pectoris. Although the patient was implanted with stents, he still presented with chest pain associated with physical efforts. Diagnosis with acute myocardial infarction was based on his ST-segment changes on electrocardiogram (ECG), elevated troponin-T level and coronary angiography. After the stents were implanted, his chest pain had no relief. Following three times of coronary angiography revealed that distal and small branch vessels still had stenosis, but was not required to revascularization. Due to serious headache resulted from sublingual or oral nitroglycerin; he had to take sublingual isosorbide dinitrate, from 20 mg to 150 mg each time, to obtain rapid relief from angina pectoris without doctor's consent. Followed up to April 2019, the patient has continued to take 100-150 mg sublingual isosorbide dinitrate for angina pectoris onset triggered by physical efforts, and has obtained remarkable relief within a few minutes, without blood pressure decrease and other side effects. Higher than recommend dosage of sublingual isosorbide dinitrate might establish better efficacy for angina pectoris in rarely patient.
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Affiliation(s)
- Hong-Yan Cao
- Department of Cardiology, First Hospital of Jilin University, Changchun, China
| | - Hai-di Wu
- Department of Cardiology, First Hospital of Jilin University, Changchun, China
| | - Zi-Kai Song
- Department of Cardiology, First Hospital of Jilin University, Changchun, China
| | - Ming-Long Tang
- Department of Cardiology, First Hospital of Jilin University, Changchun, China
| | - Shuo Yang
- Department of Cardiology, First Hospital of Jilin University, Changchun, China
| | - Yang Liu
- Department of Cardiology, First Hospital of Jilin University, Changchun, China
| | - Ling Qin
- Department of Cardiology, First Hospital of Jilin University, Changchun, China
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Wu HD, Song ZK, Xu XY, Cao HY, Wei Q, Wang JF, Zhang X, Wang XW, Qin L. Combination of D-dimer and simplified pulmonary embolism severity index to improve prediction of hospital death in patients with acute pulmonary embolism. J Int Med Res 2021; 48:300060520962291. [PMID: 33050757 PMCID: PMC7570299 DOI: 10.1177/0300060520962291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Objective To investigate whether the combination of D-dimer and simplified pulmonary embolism severity index (sPESI) could improve prediction of in-hospital death from pulmonary embolism (PE). Methods Patients with PE (n = 272) were divided into a surviving group (n = 249) and an in-hospital death group (n = 23). Results Compared with surviving patients, patients who died in hospital had significantly higher rates of hypotension and tachycardia, reduced SaO2 levels, elevated D-dimer and troponin T levels, higher sPESI scores, and were more likely to be classified as high risk. Elevated D-dimer levels and high sPESI scores were significantly associated with in-hospital death. Using thresholds for D-dimer and sPESI of 3.175 ng/mL and 1.5, respectively, the specificity for prediction of in-hospital death was 0.357 and 0.414, respectively, and the area under the receiver operating characteristic curve (AUC) was 0.665 and 0.668, respectively. When D-dimer and sPESI were considered together, the specificity for prediction of in-hospital death increased to 0.838 and the AUC increased to 0.74. Conclusions D-dimer and sPESI were associated with in-hospital death from PE. Considering D-dimer levels together with sPESI can significantly improve the specificity of predicting in-hospital death for patients with PE.
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Affiliation(s)
- Hai-Di Wu
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Zi-Kai Song
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Xiao-Yan Xu
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Hong-Yan Cao
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Qi Wei
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Jun-Feng Wang
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Xue Zhang
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Xing-Wen Wang
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Ling Qin
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
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Song ZK, Wu H, Xu X, Cao H, Wei Q, Wang J, Wang X, Zhang X, Tang M, Yang S, Liu Y, Qin L. Association Between D-Dimer Level and In-Hospital Death of Pulmonary Embolism Patients. Dose Response 2020; 18:1559325820968430. [PMID: 33335457 PMCID: PMC7724417 DOI: 10.1177/1559325820968430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 06/01/2020] [Accepted: 06/05/2020] [Indexed: 11/15/2022] Open
Abstract
To investigate whether D-dimer level could predict pulmonary embolism (PE) severity and in-hospital death, a total of 272 patients with PE were divided into a survival group (n = 249) and a death group (n = 23). Comparisons of patient characteristics between the 2 groups were performed using Mann-Whitney U test. Significant variables in univariate analysis were entered into multivariate logistic regression analysis. Receiver operating characteristic (ROC) curve analysis was performed to determine the predictive value of D-dimer level alone or together with the simplified Pulmonary Embolism Severity Index (sPESI) for in-hospital death. Results showed that patients in the death group were significantly more likely to have hypotension (P = 0.008), tachycardia (P = 0.000), elevated D-dimer level (P = 0.003), and a higher sPESI (P = 0.002) than those in the survival group. Multivariable logistic regression analysis showed that D-dimer level was an independent predictor of in-hospital death (OR = 1.07; 95% CI, 1.003-1.143; P = 0.041). ROC curve analysis showed that when D-dimer level was 3.175 ng/ml, predicted death sensitivity and specificity were 0.913 and 0.357, respectively; and when combined with sPESI, specificity (0.838) and area under the curve (0.740) were increased. Thus, D-dimer level is associated with in-hospital death due to PE; and the combination with sPESI can improve the prediction level.
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Affiliation(s)
- Zi-Kai Song
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Haidi Wu
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Xiaoyan Xu
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Hongyan Cao
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Qi Wei
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Junfeng Wang
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Xingwen Wang
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Xue Zhang
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Minglong Tang
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Shuo Yang
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Yang Liu
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
| | - Ling Qin
- Department of Cardiology, the First Hospital of Jilin
University, Changchun, China
- Ling Qin, PhD, Department of Cardiology, the
First Hospital of Jilin University, 71 Xinmin St., Changchun, Jilin, 130000,
China.
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Song ZK, Cao H, Wu H, Wei Q, Tang M, Yang S, Liu Y, Qin L. Current status of rivaroxaban in elderly patients with pulmonary embolism (Review). Exp Ther Med 2020; 19:2817-2825. [PMID: 32256765 PMCID: PMC7086161 DOI: 10.3892/etm.2020.8559] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 01/22/2020] [Indexed: 01/14/2023] Open
Abstract
Acute pulmonary embolism (PE) occurs with a high incidence rate in elderly patients, demonstrating complex clinical manifestations, as well as a difficult anticoagulant treatment strategy. Currently, there is limited understanding of the selection criteria for anticoagulant treatment in elderly patients with PE. In fact, the vitamin K antagonist warfarin, a commonly prescribed anticoagulant, has multiple disadvantages, including a narrow therapeutic range, unpredictable pharmacokinetics, multiple food and drug interactions and genetic polymorphisms resulting in poor response to this therapy; therefore, routine laboratory monitoring is required. Most elderly patients with PE fail to adhere to the treatment regimen or even discontinue it, and clinicians are equally hesitant to initiate oral anticoagulants in elderly patients with PE. This leads to a dilemma regarding the use of anticoagulation therapies and a worse prognosis for the patients. Rivaroxaban, a direct Xa factor inhibitor, has demonstrated considerable practical and clinical advantages, exhibits fast-start action pharmacokinetic and pharmacodynamic characteristics, and has an enhanced predictable anticoagulant effect with fewer drug-drug interactions. Based on randomized controlled trials and real-world clinical practice, rivaroxaban has also been recognized as a safe and effective anticoagulant, and these advantages have improved the therapeutic compliance of elderly patients with PE. Thus, this review focused on the current status of rivaroxaban treatment for elderly patients with PE, and described its significance in changing the current anticoagulation treatment regimens for patients. It is expected that rivaroxaban will become a good choice for the treatment of PE in elderly patients.
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Affiliation(s)
- Zi-Kai Song
- Department of Cardiology, The First Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
| | - Hongyan Cao
- Department of Cardiology, The First Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
| | - Haidi Wu
- Department of Cardiology, The First Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
| | - Qi Wei
- Department of Cardiology, The First Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
| | - Minglong Tang
- Department of Cardiology, The First Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
| | - Shuo Yang
- Department of Cardiology, The First Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
| | - Yang Liu
- Department of Cardiology, The First Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
| | - Ling Qin
- Department of Cardiology, The First Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
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Wu HD, Song ZK, Cao HY, Xu XY, Tang ML, Yang S, Liu Y, Qin L. Successful treatment of amniotic fluid embolism complicated by disseminated intravascular coagulation with rivaroxaban: A case report. Medicine (Baltimore) 2020; 99:e18951. [PMID: 31977912 PMCID: PMC7004698 DOI: 10.1097/md.0000000000018951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
RATIONALE An amniotic fluid embolism (AFE) is a rare, lethal syndrome that is commonly associated with disseminated intravascular coagulation (DIC). Anticoagulation therapy is the most important strategy to inhibit excessive activation of the coagulation cascade in patients with AFE and DIC. At present, treatment of AFE with rivaroxaban has not been reported. PATIENT CONCERNS We report a 37-year-old woman (gravida 2, para 1) at 39 weeks' gestation with irregular contractions of the uterus was admitted to the obstetrical department. Ten minutes after the spontaneous rupture of the membranes, the patient complained of dyspnea and dysphoria and exhibited cyanosis of her lips. The patient's blood pressure decreased and heart rate increased rapidly, and 2100 mL of unclotted blood flowed from her vagina within 1 hour. Her platelet count dropped to 21 × 10/L, and the results from routine coagulation tests, and D-dimer and fibrin degradation product tests were obviously abnormal. DIAGNOSES According to the current research consensus, AFE with DIC should be considered immediately when sudden cardiovascular collapse occurs around the time of labor and delivery, followed by the development of coagulopathy and hemorrhage. INTERVENTIONS In addition, the variety of supportive treatments, rivaroxaban was used in anticoagulant therapy. OUTCOMES At follow-up 30 and 60 days, there were no complaints of discomfort or abnormal laboratory assays. The patient recovered completely. LESSONS This case highlights that rivaroxaban, as a direct inhibitor of activated factor Xa, demonstrates a good therapeutic efficacy for treating AFE with DIC.
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Wu HD, Cao HY, Song ZK, Yang S, Tang ML, Liu Y, Qin L. Considerations for routine coagulation monitoring with rivaroxaban: A case report and review of the literature. World J Clin Cases 2019; 7:382-388. [PMID: 30746380 PMCID: PMC6369389 DOI: 10.12998/wjcc.v7.i3.382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 12/04/2018] [Accepted: 12/21/2018] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Rivaroxaban is a non-vitamin K antagonist oral anticoagulant that does not require coagulation monitoring based on current recommendations. Our goal is to explore whether routine coagulation monitoring should not be required for all patients receiving oral rivaroxaban, what relationship between routine coagulation abnormalities and bleeding, and how to deal with the above clinical situations through our case and review of the literature.
CASE SUMMARY We report a 67-year-old woman with a history of atrial fibrillation who presented to the hospital with worsening dyspnea and cough. Based on electrocardiogram, venous compression ultrasonography, and computed tomography pulmonary angiography, the diagnosis of atrial fibrillation, deep venous thrombosis, and acute pulmonary embolism was confirmed. Her coagulation assays and renal function were normal on admission; she was not underweight, did not have a history of hemorrhagic disease, and her CHA2DS2-VAS, HAS-BLED, and simplified Pulmonary Embolism Severity Index scores were 3, 0, and 0, respectively. Oral rivaroxaban (15 mg twice daily) was administered. The following day, she presented gastrointestinal and gum bleeding, combined with coagulation abnormalities. Following cessation of rivaroxaban, her bleeding stopped and tests improved over the next 2 d. Rivaroxaban was begun again 3 d after recovery. However, she again presented with gastrointestinal and gum bleeding and the abnormal tests, and the therapy was discontinued. At 30-d follow-up after discharge, she presented normal coagulation tests without bleeding.
CONCLUSION Although current guidelines recommend that using non-vitamin K antagonist oral anticoagulants including rivaroxaban do not require coagulation monitoring, a small number of patients may develop routine coagulation test changes and bleeding during rivaroxaban therapy, especially in the elderly. Clinicians should pay attention to these patients and further obtain evidence in practice.
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Affiliation(s)
- Hai-Di Wu
- Department of Cardiology, First Hospital of Jilin University, Changchun 130031, Jilin Province, China
| | - Hong-Yan Cao
- Department of Cardiology, First Hospital of Jilin University, Changchun 130031, Jilin Province, China
| | - Zi-Kai Song
- Department of Cardiology, First Hospital of Jilin University, Changchun 130031, Jilin Province, China
| | - Shuo Yang
- Department of Cardiology, First Hospital of Jilin University, Changchun 130031, Jilin Province, China
| | - Ming-Long Tang
- Department of Cardiology, First Hospital of Jilin University, Changchun 130031, Jilin Province, China
| | - Yang Liu
- Department of Cardiology, First Hospital of Jilin University, Changchun 130031, Jilin Province, China
| | - Ling Qin
- Department of Cardiology, First Hospital of Jilin University, Changchun 130031, Jilin Province, China
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Song ZK, Cao HY, Wu HD, Zhou LT, Qin L. A Case-Control Study of the Relationship Between SLC22A3-LPAL2-LPA Gene Cluster Polymorphism and Coronary Artery Disease in the Han Chinese Population. Iran Red Crescent Med J 2016; 18:e35387. [PMID: 27621937 PMCID: PMC5010879 DOI: 10.5812/ircmj.35387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/28/2016] [Accepted: 05/20/2016] [Indexed: 11/18/2022]
Abstract
Background Mutations in the solute carrier family 22 member 3 (SLC22A3), lipoprotein (a)-like 2 (LPAL2), and the lipoprotein (a) (LPA) gene cluster, which encodes apolipoprotein (a) [apo (a)] of the lipoprotein (a) [Lp (a)] lipoprotein particle, have been suggested to contribute to the risk of coronary artery disease (CAD), but the precise variants of this gene cluster have not yet been identified in Chinese populations. Objectives We sought to investigate the association between SLC22A3-LPAL2-LPA gene cluster polymorphisms and the risk of CAD in the Han Chinese population. Patients and Methods We recruited 551 CAD patients and 544 healthy controls for this case-control study. Four SNPs (rs9346816, rs2221750, rs3127596, and rs9364559) were genotyped in real time using the MassARRAY system (Sequenom; USA) in the SLC22A3-LPAL2-LPA gene cluster. All subjects were Chinese and of Han descent, and were recruited from the First Hospital of Jilin University based on convenience sampling from June 2009 to September 2012. Results The frequency of the minor allele G (34.8%) in rs9364559 was significantly higher in the CAD patients than in the healthy controls (29.4%) (P = 0.006). There was genotypic association between rs9364559 and CAD (P = 0.022), and these results still remained significant after adjustment for the conventional CAD risk factors through forward logistic regression analysis (P = 0.020, P = 0.019). Haplotype analyses from different blocks indicated that 11 haplotypes were associated with the risk of CAD. Seven haplotypes were associated with a reduced risk of CAD, whereas four haplotypes were associated with an increased risk of CAD. Conclusions Rs9364559 in the LPA gene may contribute to the risk of CAD in the Han Chinese population; haplotypes which contain rs9346816-G were all associated with an increased risk of CAD in this study.
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Affiliation(s)
- Zi-Kai Song
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Hong-Yan Cao
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Hai-Di Wu
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Li-Ting Zhou
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun, China
| | - Ling Qin
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
- Corresponding Author: Ling Qin, Department of Cardiology, The First Hospital of Jilin University, Changchun, China. Tel: +86-15843073203; Fax: +86-043184841049, E-mail:
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Cohen MJ, Song ZK, Schandler SL, Ho WH, Vulpe M. Sensory detection and pain thresholds in spinal cord injury patients with and without dysesthetic pain, and in chronic low back pain patients. Somatosens Mot Res 1996; 13:29-37. [PMID: 8725646 DOI: 10.3109/08990229609028909] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In an effort to understand the mechanisms involved in dysesthetic pain syndrome (DPS) in spinal cord injury (SCI) patients, four groups of 13 subjects each--SCI subjects with DPS, SCI subjects without pain, chronic low back pain subjects, and control subjects--were examined for sensory detection and pain thresholds at forearm, neck, and rostral trunk areas. Results indicated that the SCI pain group had significantly lower pain thresholds at all skin sites, compared to the SCI no-pain and chronic low back pain groups, and at the rostral trunk skin site, compared to the control group. The SCI pain group also showed a lower sensory detection threshold at the rostral trunk skin site than did the SCI no-pain group. Equally important, the SCI no-pain group had detection and pain thresholds significantly higher than those of the control group. The results suggest fundamental differences in somatosensory processing when DPS is or is not a consequence of SCI.
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Affiliation(s)
- M J Cohen
- Research Service, Department of Veterans Affairs Medical Center, Long Beach, California 90822, USA. Cohen.Michael@Long-Beach. VA.Gov
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Song ZK, Cohen MJ, Ament PA, Ho WH, Vulpe M, Schandler SL. Two-point discrimination thresholds in spinal cord injured patients with dysesthetic pain. Paraplegia 1993; 31:425-93. [PMID: 8414631 DOI: 10.1038/sc.1993.79] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We questioned whether deafferentation following SCI would result in an increase in somatic sensitivity possibly due to cortical reorganization. Dysesthetic pain syndrome (DPS) below the level of a spinal cord injury (SCI) is a common complication. We hypothesized that DPS patients would show increased cortical reorganization because of high levels of sensory stimulation following injury. Sixteen dysesthetic pain SCI patients, 15 SCI patients without pain, and 16 control subjects were examined for two-point discrimination thresholds (2PDT) of the forearm, neck, and spine. The SCI pain group had significantly smaller 2PDTs than either SCI no pain or control groups, particularly over the neck and spine. The SCI pain group had a significant inverse correlation between perceived degree of pain (visual analogue scale) and 2PDT in the spinal skin area. The findings indicate that SCI patients with severe DPS have a higher sensitivity to somatosensory stimuli, particularly in skin areas with projections to primary somatosensory cortex areas adjacent to the deafferentated region. The increase in 2PDT may be due to an increase in the size of the somatosensory cortical areas allotted to the corresponding skin areas.
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Affiliation(s)
- Z K Song
- Research Service, Department of Veterans Affairs Medical Center, Long Beach, California
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