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Kamvuma K, Hamooya BM, Munsaka S, Masenga SK, Kirabo A. Mechanisms and Cardiorenal Complications of Chronic Anemia in People with HIV. Viruses 2024; 16:542. [PMID: 38675885 PMCID: PMC11053456 DOI: 10.3390/v16040542] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 03/26/2024] [Accepted: 03/29/2024] [Indexed: 04/28/2024] Open
Abstract
Chronic anemia is more prevalent in people living with HIV (PLWH) compared to the general population. The mechanisms that drive chronic anemia in HIV are multifaceted and include functional impairment of hematopoietic stem cells, dysregulation of erythropoietin production, and persistent immune activation. Chronic inflammation from HIV infection adversely affects erythropoiesis, erythrocyte lifespan, and erythropoietin response, leading to a heightened risk of co-infections such as tuberculosis, persistent severe anemia, and increased mortality. Additionally, chronic anemia exacerbates the progression of HIV-associated nephrotoxicity and contributes to cardiovascular risk through immune activation and inflammation. This review highlights the cardinal role of chronic inflammation as a link connecting persistent anemia and cardiovascular complications in PLWH, emphasizing the need for a universal understanding of these interconnected pathways for targeted interventions.
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Affiliation(s)
- Kingsley Kamvuma
- HAND Research Group, School of Medicine and Health Sciences, Mulungushi University, Livingstone Campus, Livingstone 10101, Zambia; (K.K.); (B.M.H.)
| | - Benson M. Hamooya
- HAND Research Group, School of Medicine and Health Sciences, Mulungushi University, Livingstone Campus, Livingstone 10101, Zambia; (K.K.); (B.M.H.)
| | - Sody Munsaka
- Department of Biomedical Sciences, School of Health Sciences, University of Zambia, Lusaka P.O Box 50110, Zambia;
| | - Sepiso K. Masenga
- HAND Research Group, School of Medicine and Health Sciences, Mulungushi University, Livingstone Campus, Livingstone 10101, Zambia; (K.K.); (B.M.H.)
- Vanderbilt Institute for Global Health, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Annet Kirabo
- Vanderbilt Institute for Global Health, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
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Vlad RM, Dobritoiu R, Niculescu C, Moga A, Balanescu L, Pacurar D. From Severe Anemia to Intestinal Hemangiomatosis, a Bumpy Road-A Case Report and Literature Review. Diagnostics (Basel) 2024; 14:310. [PMID: 38337828 PMCID: PMC10855473 DOI: 10.3390/diagnostics14030310] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/18/2024] [Accepted: 01/19/2024] [Indexed: 02/12/2024] Open
Abstract
Gastrointestinal hemangiomas (GIH) are unusual vascular tumors found anywhere alongside the GI tract, the small bowel being the most common site. Diagnosis requires good clinical insight and modern imaging. This is a comprehensive review of the literature, starting from a new pediatric case diagnosed through exploratory laparotomy after complex imaging techniques failed. This research was conducted on published articles from the past 25 years. We identified seventeen original papers (two series of cases with three and two patients, respectively, and fifteen case reports). The female/male ratio was 1.5. The youngest patient was a 3-week-old boy, and the was oldest a 17-year-old girl. The most common localization was the jejunum (eight cases), followed by the ileum (four), colon (three), stomach (two), and rectum (one). Seven children had cavernous and four had capillary hemangiomas. Eight patients presented gastrointestinal bleeding, seven had refractory anemia, such as our index patient, three had recurrent abdominal pain, and two had bowel obstruction. Surgical assessment was successful in fifteen cases; three cases experienced great outcomes with oral propranolol, one child was treated successfully with sirolimus, and for one patient, endoscopic treatment was the best choice. The authors present the case of a female patient admitted to the Pediatrics Department of "Grigore Alexandrescu" Emergency Children's Hospital from 25 February to 28 March 2019 for severe anemia, refractory to oral iron treatment, and recurrent blood infusions. No clear bleeding cause had been found. Although very uncommon, intestinal hemangiomas can express puzzling, life-threatening symptoms. We should keep in mind this disorder in cases of unresponsive chronic anemia.
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Affiliation(s)
- Raluca Maria Vlad
- “Grigore Alexandrescu” Emergency Children’s Hospital, 011743 Bucharest, Romania; (R.D.); (A.M.); (L.B.); (D.P.)
- Department of General Medicine, Pediatrics, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Ruxandra Dobritoiu
- “Grigore Alexandrescu” Emergency Children’s Hospital, 011743 Bucharest, Romania; (R.D.); (A.M.); (L.B.); (D.P.)
| | | | - Andreea Moga
- “Grigore Alexandrescu” Emergency Children’s Hospital, 011743 Bucharest, Romania; (R.D.); (A.M.); (L.B.); (D.P.)
- Department of General Medicine, Pediatrics, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Laura Balanescu
- “Grigore Alexandrescu” Emergency Children’s Hospital, 011743 Bucharest, Romania; (R.D.); (A.M.); (L.B.); (D.P.)
- Department of General Medicine, Pediatrics, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Daniela Pacurar
- “Grigore Alexandrescu” Emergency Children’s Hospital, 011743 Bucharest, Romania; (R.D.); (A.M.); (L.B.); (D.P.)
- Department of General Medicine, Pediatrics, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania
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Tănăsescu MD, Popescu Ș, Mincă A, Isac T, Suliman E, Grigorie MM, Suliman E, Stăniloaie D, Timofte D, Ionescu D. Paragangliomas and Anemia: Literature Review and Case Report. Medicina (Kaunas) 2023; 59:1925. [PMID: 38003974 PMCID: PMC10673208 DOI: 10.3390/medicina59111925] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/25/2023] [Accepted: 10/28/2023] [Indexed: 11/26/2023]
Abstract
Paragangliomas are rare neuroendocrine tumors that arise from the extra-adrenal autonomic paraganglia, i.e., small organs consisting mainly of neuroendocrine cells that are derived from the embryonic neural crest and have the ability to secrete catecholamines. Paragangliomas can derive from either parasympathetic or sympathetic paraganglia. Most of the parasympathetic ganglia-derived paragangliomas are nonfunctional, and symptoms result from mass effect. Conversely, the sympathetic paragangliomas are functional and produce catecholamine. Although such patients could have symptoms similar to pheochromocytoma, mass effect symptoms, or non-specific symptoms, being benign tumors, they can also present with anemia, specifically iron-deficiency anemia. Considering that neoplastic pathology is chronically accompanied by moderate, normochromic, normocytic anemia, association between paragangliomas that are mostly benign but with a potential degree of malignancy and anemia is not as frequent as expected, with only 12 cases reported in the literature. We report a case of a 54-year-old female patient diagnosed with a paraganglioma of the carotid glomus accompanied by severe normochromic, normocytic anemia, which reached normal limits after excision of the paraganglioma.
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Affiliation(s)
- Maria-Daniela Tănăsescu
- Department 1 of Medical Semiology, Discipline of Medical Semiology and Nephrology, Bucharest Emergency University Hospital, Faculty of Medicine, ‘Carol Davila’ University of Medicine and Pharmacy, Dionisie Lupu Street, No. 37, Sector 2, 020021 Bucharest, Romania; (M.-D.T.); (D.I.)
- Department of Nephrology, Bucharest Emergency University Hospital, 050098 Bucharest, Romania;
| | - Ștefan Popescu
- Department of Nephrology, Bucharest Emergency University Hospital, 050098 Bucharest, Romania;
| | - Alexandru Mincă
- Department 1 of Medical Semiology, Discipline of Medical Semiology and Nephrology, Bucharest Emergency University Hospital, Faculty of Medicine, ‘Carol Davila’ University of Medicine and Pharmacy, Dionisie Lupu Street, No. 37, Sector 2, 020021 Bucharest, Romania; (M.-D.T.); (D.I.)
| | - Teodora Isac
- Department 2 of Internal Medicine, Faculty of Medicine, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Emel Suliman
- Department 10 of General Surgery, Discipline of Surgery I, Bucharest Emergency University Hospital, Faculty of Medicine, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania; (E.S.); (D.S.)
| | - Maria Mihaela Grigorie
- Department 3 of Dentistry III, Discipline of Endodontics, Faculty of Dentistry, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Emine Suliman
- Department 3 of Complementary Sciences, Discipline of Medical Informatics and Biostatistics, Faculty of Medicine, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Daniel Stăniloaie
- Department 10 of General Surgery, Discipline of Surgery I, Bucharest Emergency University Hospital, Faculty of Medicine, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania; (E.S.); (D.S.)
- 21st Department of General Surgery, Bucharest Emergency University Hospital, 050098 Bucharest, Romania
| | - Delia Timofte
- Department of Dialysis, Bucharest Emergency University Hospital, 050098 Bucharest, Romania;
| | - Dorin Ionescu
- Department 1 of Medical Semiology, Discipline of Medical Semiology and Nephrology, Bucharest Emergency University Hospital, Faculty of Medicine, ‘Carol Davila’ University of Medicine and Pharmacy, Dionisie Lupu Street, No. 37, Sector 2, 020021 Bucharest, Romania; (M.-D.T.); (D.I.)
- Department of Nephrology, Bucharest Emergency University Hospital, 050098 Bucharest, Romania;
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Ubbink R, Streng LWJM, Raat NJH, Harms FA, Te Boekhorst PAW, Stolker RJ, Mik EG. Measuring Mitochondrial Oxygen Tension during Red Blood Cell Transfusion in Chronic Anemia Patients: A Pilot Study. Biomedicines 2023; 11:1873. [PMID: 37509512 PMCID: PMC10376882 DOI: 10.3390/biomedicines11071873] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 06/19/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
In light of the associated risks, the question has been raised whether the decision to give a blood transfusion should solely be based on the hemoglobin level. As mitochondria are the final destination of oxygen transport, mitochondrial parameters are suggested to be of added value. The aims of this pilot study were to investigate the effect of a red blood cell transfusion on mitochondrial oxygenation as measured by the COMET device in chronic anemia patients and to explore the clinical usability of the COMET monitor in blood transfusion treatments, especially the feasibility of performing measurements in an outpatient setting. To correct the effect of volume load on mitochondrial oxygenation, a red blood cell transfusion and a saline infusion were given in random order. In total, 21 patients were included, and this resulted in 31 observations. If patients participated twice, the order of infusion was reversed. In both the measurements wherein a blood transfusion was given first and wherein 500 mL of 0.9% saline was given first, the median mitochondrial oxygen tension decreased after red blood cell transfusion. The results of this study have strengthened the need for further research into the effect of blood transfusion tissue oxygenation and the potential role of mitochondrial parameters herein.
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Affiliation(s)
- Rinse Ubbink
- Laboratory of Experimental Anesthesiology, Department of Anesthesiology, Erasmus MC, University Medical Center Rotterdam, 3000 CA Rotterdam, The Netherlands
| | - Lucia W J M Streng
- Laboratory of Experimental Anesthesiology, Department of Anesthesiology, Erasmus MC, University Medical Center Rotterdam, 3000 CA Rotterdam, The Netherlands
| | - Nicolaas J H Raat
- Laboratory of Experimental Anesthesiology, Department of Anesthesiology, Erasmus MC, University Medical Center Rotterdam, 3000 CA Rotterdam, The Netherlands
| | - Floor A Harms
- Laboratory of Experimental Anesthesiology, Department of Anesthesiology, Erasmus MC, University Medical Center Rotterdam, 3000 CA Rotterdam, The Netherlands
| | - Peter A W Te Boekhorst
- Department of Hematology, Erasmus MC, University Medical Center Rotterdam, 3000 CA Rotterdam, The Netherlands
| | - Robert J Stolker
- Laboratory of Experimental Anesthesiology, Department of Anesthesiology, Erasmus MC, University Medical Center Rotterdam, 3000 CA Rotterdam, The Netherlands
| | - Egbert G Mik
- Laboratory of Experimental Anesthesiology, Department of Anesthesiology, Erasmus MC, University Medical Center Rotterdam, 3000 CA Rotterdam, The Netherlands
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González-Zacarías C, Choi S, Vu C, Xu B, Shen J, Joshi AA, Leahy RM, Wood JC. Chronic anemia: The effects on the connectivity of white matter. Front Neurol 2022; 13:894742. [PMID: 35959402 PMCID: PMC9362738 DOI: 10.3389/fneur.2022.894742] [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: 03/12/2022] [Accepted: 06/29/2022] [Indexed: 01/26/2023] Open
Abstract
Chronic anemia is commonly observed in patients with hemoglobinopathies, mainly represented by disorders of altered hemoglobin (Hb) structure (sickle cell disease, SCD) and impaired Hb synthesis (e.g. thalassemia syndromes, non-SCD anemia). Both hemoglobinopathies have been associated with white matter (WM) alterations. Novel structural MRI research in our laboratory demonstrated that WM volume was diffusely lower in deep, watershed areas proportional to anemia severity. Furthermore, diffusion tensor imaging analysis has provided evidence that WM microstructure is disrupted proportionally to Hb level and oxygen saturation. SCD patients have been widely studied and demonstrate lower fractional anisotropy (FA) in the corticospinal tract and cerebellum across the internal capsule and corpus callosum. In the present study, we compared 19 SCD and 15 non-SCD anemia patients with a wide range of Hb values allowing the characterization of the effects of chronic anemia in isolation of sickle Hb. We performed a tensor analysis to quantify FA changes in WM connectivity in chronic anemic patients. We calculated the volumetric mean of FA along the pathway of tracks connecting two regions of interest defined by BrainSuite's BCI-DNI atlas. In general, we found lower FA values in anemic patients; indicating the loss of coherence in the main diffusion direction that potentially indicates WM injury. We saw a positive correlation between FA and hemoglobin in these same regions, suggesting that decreased WM microstructural integrity FA is highly driven by chronic hypoxia. The only connection that did not follow this pattern was the connectivity within the left middle-inferior temporal gyrus. Interestingly, more reductions in FA were observed in non-SCD patients (mainly along with intrahemispheric WM bundles and watershed areas) than the SCD patients (mainly interhemispheric).
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Affiliation(s)
- Clio González-Zacarías
- Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, United States,Signal and Image Processing Institute, University of Southern California, Los Angeles, CA, United States,Department of Pediatrics and Radiology, Children's Hospital Los Angeles, Los Angeles, CA, United States
| | - Soyoung Choi
- Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, United States,Signal and Image Processing Institute, University of Southern California, Los Angeles, CA, United States,Department of Pediatrics and Radiology, Children's Hospital Los Angeles, Los Angeles, CA, United States
| | - Chau Vu
- Department of Pediatrics and Radiology, Children's Hospital Los Angeles, Los Angeles, CA, United States,Biomedical Engineering, University of Southern California, Los Angeles, CA, United States
| | - Botian Xu
- Department of Pediatrics and Radiology, Children's Hospital Los Angeles, Los Angeles, CA, United States,Biomedical Engineering, University of Southern California, Los Angeles, CA, United States
| | - Jian Shen
- Department of Pediatrics and Radiology, Children's Hospital Los Angeles, Los Angeles, CA, United States,Biomedical Engineering, University of Southern California, Los Angeles, CA, United States
| | - Anand A. Joshi
- Signal and Image Processing Institute, University of Southern California, Los Angeles, CA, United States
| | - Richard M. Leahy
- Signal and Image Processing Institute, University of Southern California, Los Angeles, CA, United States,Biomedical Engineering, University of Southern California, Los Angeles, CA, United States
| | - John C. Wood
- Department of Pediatrics and Radiology, Children's Hospital Los Angeles, Los Angeles, CA, United States,Biomedical Engineering, University of Southern California, Los Angeles, CA, United States,*Correspondence: John C. Wood
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Bhardwaj B, Karuparthi PR, Desai R, Fong HK, Aggarwal K. Anemia Among Patients Undergoing Transcatheter Mitral Valve Repair: From the National Inpatient Sample in the United States. Cureus 2020; 12:e10074. [PMID: 33005502 PMCID: PMC7522055 DOI: 10.7759/cureus.10074] [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: 08/13/2020] [Accepted: 08/27/2020] [Indexed: 12/02/2022] Open
Abstract
Background The prevalence and impact of anemia on the outcomes of transcatheter mitral valve repair (TMVr) have not been well-studied. Anemia is a commonly encountered comorbidity among patients with cardiovascular disorders and is frequently under-recognized. The study aimed to analyze the prevalence of anemia and its impact on post-TMVr in-hospital outcomes. Methods The National Inpatient Sample (NIS) was queried to identify all patients who underwent TMVr from 2011-2015 in the United States by utilizing suitable International Classification of Diseases, Ninth Revision (ICD-9) codes. The baseline characteristics and in-hospital outcomes were compared among patients with and without anemia. Results A total of 4,382 patients were identified. Out of these, 978 (22.3%) patients had baseline anemia. Anemic patients were noted to have a higher burden of co-morbidities, including chronic kidney disease, hypertension, and diabetes mellitus. The in-hospital mortality was higher but not statistically significant between anemic and non-anemic patients (3.6% vs 2.6%; odds ratio (OR): 1.44; confidence interval (CI): 0.85-2.46, p=0.179). The other adverse outcomes, including the length of stay, the requirement for blood transfusions, the incidence of post-implant acute kidney injury, hemodialysis, and the cost of hospitalization, were higher in anemic patients. Conclusion Anemia was present in one out of five patients undergoing TMVr in this nationally representative cohort. Baseline anemia showed numerically higher but not statistically significant in-hospital mortality and was associated with other in-hospital adverse outcomes. Further larger studies are needed to highlight the importance of anemia in the TMVr procedure.
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Affiliation(s)
- Bhaskar Bhardwaj
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Missouri-Columbia, Columbia, USA
| | - Poorna R Karuparthi
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Missouri-Columbia, Columbia, USA
| | - Rupak Desai
- Department of Cardiology, Atlanta Veterans Affairs Medical Center, Decatur, USA
| | - Hee Kong Fong
- Department of Cardiovascular Medicine, University of California Davis Medical Center, Sacramento, USA
| | - Kul Aggarwal
- Department of Internal Medicine, Division of Cardiovascular Diseases, University of Missouri-Columbia, Columbia, USA
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Abstract
Sickle cell disease (SCD) is an inherited disorder that occurs due to point mutation in the beta-globin chain resulting in the production of hemoglobin S that tends to become rigid and sickle-shaped under low oxygen concentration. These sickle-shaped red blood cells (RBCs) obstruct the blood vessels leading to reduced blood flow to the organs, causing ischemia and tissue fibrosis. These sickle RBCs being abnormal in shape are frequently sequestered by the spleen, creating a state of chronic anemia in the body. This chronic anemia leads to a high cardiac output state causing cardiac remodeling. To tackle chronic anemia, patients are frequently treated with blood transfusions that makes them more prone to the risk of iron overload (from newly transfused RBCs and iron release from the RBCs that just got sequestered as well as from volume overload) and volume overload causing left ventricular (LV) dilation. The above-mentioned mechanism of cardiac hypertrophy, along with LV dilation together, makes SCD-related cardiomyopathy unique cardiomyopathy with features of restrictive cardiomyopathy with LV dilation. It is interesting to note here that even though there is a presence of LV dilatation, Systolic dysfunction is very uncommon in SCD-related cardiomyopathy.
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Affiliation(s)
- Harsimran Kaur
- Internal Medicine, California Institute of Behavioural Neurosciences and Psychology, Fairfield, USA
| | - Fahad Aurif
- General Surgery, California Institute of Behavioural Neurosciences and Psychology, Fairfield, USA
| | - Mahdi Kittaneh
- General and Laparoscopic Surgery, California Institute of Behavioural Neurosciences and Psychology, Fairfield, USA
| | - Jeoffrey Patrick G Chio
- Family Medicine, California Institute of Behavioural Neurosciences and Psychology, Fairfield, USA
| | - Bilal Haider Malik
- Internal Medicine, California Institute of Behavioural Neurosciences and Psychology, Fairfield, USA
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Coloigner J, Vu C, Borzage M, Bush A, Choi S, Miao X, Chai Y, Galarza C, Lepore N, Tamrazi B, Coates TD, Wood JC. Transient Hypoxia Model Revealed Cerebrovascular Impairment in Anemia Using BOLD MRI and Near-Infrared Spectroscopy. J Magn Reson Imaging 2020; 52:1400-1412. [PMID: 32648323 DOI: 10.1002/jmri.27210] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/07/2020] [Accepted: 05/08/2020] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Obstructive sleep apnea and nocturnal oxygen desaturations, which are prevalent in sickle cell disease (SCD) and chronic anemia disorders, have been linked to risks of stroke and silent cerebral infarcts (SCI). Cerebrovascular response to intermittent desaturations has not been well studied and may identify patients at greatest risk. PURPOSE To investigate the cerebral dynamic response to induced desaturation in SCD patients with and without SCI, chronic anemia, and healthy subjects. STUDY TYPE Prospective. SUBJECTS Twenty-six SCD patients (age = 21 ± 8.2, female 46.2%), including 15 subjects without SCI and nine subjects with SCI, 15 nonsickle anemic patients (age = 22 ± 5.8, female 66.7%), and 31 controls (age = 28 ± 12.3, female 77.4%). FIELD STRENGTH/SEQUENCE 3T, gradient-echo echo-planar imaging. ASSESSMENT A transient hypoxia challenge of five breaths of 100% nitrogen gas was performed with blood oxygen level-dependent (BOLD) MRI and near-infrared spectroscopy (NIRS) acquisitions. Hypoxia responses were characterized by desaturation depth, time-to-peak, return-to-baseline half-life, and posthypoxia recovery in the BOLD and NIRS time courses. SCI were documented by T2 fluid-attenuation inversion recovery (FLAIR). STATISTICAL TESTS Univariate and multivariate regressions were performed between hypoxic parameters and anemia predictors. Voxelwise two-sample t-statistic maps were used to assess the regional difference in hypoxic responses between anemic and control groups. RESULTS Compared to controls, SCD and chronically anemic patients demonstrated significantly higher desaturation depth (P < 0.01) and shorter return-to-baseline timing response (P < 0.01). Patients having SCI had shorter time-to-peak (P < 0.01), return-to-baseline (P < 0.01), and larger desaturation depth (P < 0.01) in both white matter regions at risk and normal-appearing white matter than patients without infarcts. On multivariate analysis, desaturation depth and timing varied with age, sex, blood flow, white blood cells, and cell-free hemoglobin (r2 = 0.25 for desaturation depth; r2 = 0.18 for time-to-peak; r2 = 0.37 for return-to-baseline). DATA CONCLUSION Transient hypoxia revealed global and regional response differences between anemic and healthy subjects. SCI was associated with extensive heterogeneity of desaturation dynamics, consistent with extensive underlying microvascular remodeling.
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Affiliation(s)
- Julie Coloigner
- CIBORG Laboratory, Department of Radiology, Children's Hospital Los Angeles, Los Angeles, California, USA.,Univ Rennes, CNRS, Inria, Inserm, IRISA UMR 6074, Rennes, France
| | - Chau Vu
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA
| | - Matthew Borzage
- Division of Neonatology, Fetal and Neonatal Institute, Children's Hospital Los Angeles, Los Angeles, California, USA.,Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Adam Bush
- Department of Radiology and Department of Electrical Engineering, Stanford University, Stanford, California, USA
| | - Soyoung Choi
- Neuroscience Graduate Program, University of Southern California, Los Angeles, California, USA
| | - Xin Miao
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA
| | - Yaqiong Chai
- CIBORG Laboratory, Department of Radiology, Children's Hospital Los Angeles, Los Angeles, California, USA.,Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA
| | - Cristina Galarza
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Natasha Lepore
- CIBORG Laboratory, Department of Radiology, Children's Hospital Los Angeles, Los Angeles, California, USA.,Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA.,Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Benita Tamrazi
- Department of Radiology, Children's Hospital Los Angeles, Los Angeles, California, USA
| | - Thomas D Coates
- Division of Hematology-Oncology, Department of Pediatrics, Children's Hospital Los Angeles, Los Angeles, California, USA.,Department of Pediatrics and Pathology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - John C Wood
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA.,Division of Cardiology, Department of Pediatrics and Radiology, Children's Hospital Los Angeles, Los Angeles, California, USA
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Abstract
Hemangiomas of the small intestine are rare and very difficult to diagnose preoperatively. Clinical presentations may include occult or massive gastrointestinal (GI) bleeding, obstruction, intussusception, and perforation. We report a 66-year-old Caucasian male patient with severe anemia secondary to occult GI bleeding from a cavernous hemangioma in the jejunum. A double balloon enteroscopy following capsule endoscopy was performed to obtain biopsy samples, which established the final diagnosis.
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Affiliation(s)
- Ceren Durer
- Internal Medicine, Florida Hospital-Orlando, Orlando, USA
| | - Seren Durer
- Internal Medicine, Florida Hospital-Orlando, Orlando, USA
| | | | - Isin Y Comba
- Internal Medicine, UCF Internal Medicine Residency Program, Orlando, USA
| | - Ilan Aharoni
- Gastroenterology, Florida Hospital, Orlando, USA
| | - Umair Majeed
- Internal Medicine Residency, Florida Hospital-Orlando, Casselberry, USA
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Abstract
OBJECTIVES To report 2 cases of reversible cerebral vasoconstriction syndrome (RCVS) with posterior reversible encephalopathy syndrome (PRES) after blood transfusion for severe anemia. BACKGROUND RCVS is presented with recurrent thunderclap headache and reversible constriction of cerebral arteries. PRES is a known complication of RCVS. Blood transfusion for severe anemia could be a cause for PRES in few cases; however, it is seldom mentioned as an etiology for RCVS. METHODS We report a case series. RESULTS We report 2 women presented with RCVS with PRES after blood transfusion for anemia, and reviewed another 4 similar cases reported in the literature. Our 2 patients were middle-aged women, with severe chronic anemia (average hemoglobin: 1.45 g/dL), and received multiple blood transfusions (average: 3250 mL) over a period of 5-7 days. They developed thunderclap headache and other symptoms about 1 week after the last blood transfusion. Cerebral vasoconstrictions were demonstrated by magnetic resonance angiography and transcranial color-coded sonography. PRES was found in both of them using magnetic resonance imaging, and one of them also had cytotoxic edema on diffusion weighted image. CONCLUSIONS RCVS with PRES is one complication of blood transfusion in patients under chronic severe anemia (especially when hemoglobin level increased for more than 5 g/dL), particularly in Asian women with menorrhagia. Blood pressure surge and the occurrence of severe headaches or other neurological symptoms should be aggressively monitored within 10 days after the last blood transfusion.
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Affiliation(s)
- Yi-Hsuan Dou
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan; Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
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