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Barenco-Marins TS, Seara FAC, Ponte CG, Nascimento JHM. Pulmonary Circulation Under Pressure: Pathophysiological and Therapeutic Implications of BK Channel. Cardiovasc Drugs Ther 2023:10.1007/s10557-023-07503-7. [PMID: 37624526 DOI: 10.1007/s10557-023-07503-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/10/2023] [Indexed: 08/26/2023]
Abstract
The large-conductance Ca2+-activated K+ (BK) channel is widely expressed in the pulmonary blood vessels and plays a significant role in regulating pulmonary vascular tonus. It opens under membrane depolarization, increased intracellular Ca+2 concentration, and chronic hypoxia, resulting in massive K+ efflux, membrane hyperpolarization, decreased L-type Ca+2 channel opening, and smooth muscle relaxation. Several reports have demonstrated an association between BK channel dysfunction and pulmonary hypertension (PH) development. Decreased BK channel subunit expression and impaired regulation by paracrine hormones result in decreased BK channel opening, increased pulmonary vascular resistance, and pulmonary arterial pressure being the cornerstone of PH. The resulting right ventricular pressure overload ultimately leads to ventricular remodeling and failure. Therefore, it is unsurprising that the BK channel has arisen as a potential target for treating PH. Recently, a series of selective, synthetic BK channel agonists have proven effective in attenuating the pathophysiological progression of PH without adverse effects in animal models.
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Affiliation(s)
- Thais S Barenco-Marins
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Programa de Pós-Graduação Em Cardiologia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Fernando A C Seara
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
- Instituto de Ciências Biológicas E da Saúde, Universidade Federal Rural Do Rio de Janeiro, Seropédica, RJ, Brazil.
- Programa de Pós-Graduação Multicêntrico Em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia, São Paulo, Brazil.
| | - Cristiano G Ponte
- Instituto Federal de Educação, Ciências e Tecnologia do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Jose H M Nascimento
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Programa de Pós-Graduação Em Cardiologia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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2
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Cook CM, Craddock VD, Ram AK, Abraham AA, Dhillon NK. HIV and Drug Use: A Tale of Synergy in Pulmonary Vascular Disease Development. Compr Physiol 2023; 13:4659-4683. [PMID: 37358518 PMCID: PMC10693986 DOI: 10.1002/cphy.c210049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
Over the past two decades, with the advent and adoption of highly active anti-retroviral therapy, HIV-1 infection, a once fatal and acute illness, has transformed into a chronic disease with people living with HIV (PWH) experiencing increased rates of cardio-pulmonary vascular diseases including life-threatening pulmonary hypertension. Moreover, the chronic consequences of tobacco, alcohol, and drug use are increasingly seen in older PWH. Drug use, specifically, can have pathologic effects on the cardiovascular health of these individuals. The "double hit" of drug use and HIV may increase the risk of HIV-associated pulmonary arterial hypertension (HIV-PAH) and potentiate right heart failure in this population. This article explores the epidemiology and pathophysiology of PAH associated with HIV and recreational drug use and describes the proposed mechanisms by which HIV and drug use, together, can cause pulmonary vascular remodeling and cardiopulmonary hemodynamic compromise. In addition to detailing the proposed cellular and signaling pathways involved in the development of PAH, this article proposes areas ripe for future research, including the influence of gut dysbiosis and cellular senescence on the pathobiology of HIV-PAH. © 2023 American Physiological Society. Compr Physiol 13:4659-4683, 2023.
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Affiliation(s)
- Christine M Cook
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Vaughn D Craddock
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Anil K Ram
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Ashrita A Abraham
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Navneet K Dhillon
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA
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3
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Thienemann F, Katoto PDMC, Azibani F, Kodogo V, Mukasa SL, Sani MU, Karaye KM, Mbanze I, Mocumbi AO, Dzudie A, Sliwa K. Long-Term Follow-up of Human Immunodeficiency Virus-Associated Pulmonary Hypertension: Clinical Features and Survival Outcomes of the Pan Africa Pulmonary Hypertension Cohort (PAPUCO). Open Forum Infect Dis 2022; 9:ofac604. [PMID: 36601555 PMCID: PMC9801092 DOI: 10.1093/ofid/ofac604] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Indexed: 11/29/2022] Open
Abstract
Background Data characterizing risk factors and long-term outcome studies on human immunodeficiency virus (HIV)-associated pulmonary hypertension (PH) in Africa are lacking. Methods The Pan African Pulmonary Hypertension Cohort, a multinational registry of 254 consecutive patients diagnosed with PH (97% of African descent) from 9 centers in 4 African countries was implemented. We compared baseline characteristics and 3-year survival of an HIV-infected cohort newly diagnosed with PH (PH/HIV+) to an HIV-uninfected cohort with PH (PH/HIV-). Results One hundred thirty-four participants with PH completed follow up (47 PH/HIV+ and 87 PH/HIV-; age median, 36 versus 44 years; P = .0004). Cardiovascular risk factors and comorbidities were similar except for previous tuberculosis (62% versus 18%, P < .0001). Six-minute walk distance (6MWD) <300 meters was common in PH/HIV- (P = .0030), but PH/HIV+ had higher heart (P = .0160) and respiratory (P = .0374) rates. Thirty-six percent of PH/HIV+ and 15% of PH/HIV- presented with pulmonary arterial hypertension (PAH) (P = .0084), whereas 36% of PH/HIV+ and 72% of PH/HIV- exhibited PH due to left heart disease (PHLHD) (P = .0009). Pulmonary hypertension due to lung diseases and hypoxia (PHLD) was frequent in PH/HIV+ (36% versus 15%) but did not reach statistical significance. Human immunodeficiency virus-associated PAH tended to have a poorer survival rate compared with PHLHD/PHLD in HIV-infected patients. Conclusions The PH/HIV + patients were younger and commonly had previous tuberculosis compared to PH/HIV- patients. Despite a better 6MWD at presentation, they had more signs and symptoms of early onset heart failure and a worse survival rate. Early echocardiography assessment should be performed in HIV-infected patients with history of tuberculosis who present with signs and symptoms of heart failure or posttuberculosis lung disease.
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Affiliation(s)
- Friedrich Thienemann
- General Medicine & Global Health, Cape Heart Institute, Faculty of Health Science, University of Cape Town, Cape Town, South Africa
- Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- Department of Internal Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Patrick D M C Katoto
- General Medicine & Global Health, Cape Heart Institute, Faculty of Health Science, University of Cape Town, Cape Town, South Africa
- Department of Medicine and Center for Infectious Diseases, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
- Department of Medicine, Division of Respiratory Medicine and Prof. Lurhuma Biomedical Research Laboratory, Mycobacterium Unit, Catholic University of Bukavu, Bukavu, Democratic Republic of Congo
| | - Feriel Azibani
- General Medicine & Global Health, Cape Heart Institute, Faculty of Health Science, University of Cape Town, Cape Town, South Africa
- INSERM U942, Paris, France
| | - Vitaris Kodogo
- General Medicine & Global Health, Cape Heart Institute, Faculty of Health Science, University of Cape Town, Cape Town, South Africa
| | - Sandra L Mukasa
- General Medicine & Global Health, Cape Heart Institute, Faculty of Health Science, University of Cape Town, Cape Town, South Africa
- Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Mahmoud U Sani
- Department of Medicine, Bayero University Kano and Aminu Kano Teaching Hospital, Kano, Nigeria
| | - Kamilu M Karaye
- Department of Medicine, Bayero University Kano and Aminu Kano Teaching Hospital, Kano, Nigeria
| | - Irina Mbanze
- Faculty of Medicine, Universidade Eduardo Mondlane, Maputo, Mozambique
| | - Ana O Mocumbi
- Faculty of Medicine, Universidade Eduardo Mondlane, Maputo, Mozambique
- Instituto Nacional de Saúde, Maputo, Mozambique
| | - Anastase Dzudie
- Department of Internal Medicine, Douala General Hospital, Cameroon
| | - Karen Sliwa
- General Medicine & Global Health, Cape Heart Institute, Faculty of Health Science, University of Cape Town, Cape Town, South Africa
- Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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4
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Hon SM, Alpizar-Rivas RM, Farber HW. Pulmonary Arterial Hypertension in Patients Infected with the Human Immunodeficiency Virus. Cardiol Clin 2021; 40:45-54. [PMID: 34809916 DOI: 10.1016/j.ccl.2021.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
It is important to recognize and treat human immunodeficiency virus-associated pulmonary arterial hypertension (HIV-PAH) because of the associated morbidity and mortality. With the introduction of antiretroviral therapies (ART), improved survival has changed the focus of treatment management from immunodeficiency-related opportunistic infections to chronic cardiovascular complications, including HIV-PAH. The 2018 6th World Symposium of Pulmonary Hypertension recommended a revised definition of PAH that might result in a greater number of patients with HIV-PAH; however, the implication of this change is not yet clear. Here, we review the current literature on the diagnosis, management, and outcomes of patients with HIV-PAH.
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Affiliation(s)
- Stephanie M Hon
- Division of Pulmonary, Critical Care, and Sleep Medicine, Tufts Medical Center, 800 Washington Street, Box 257, Boston, MA 02111, USA.
| | - Rodolfo M Alpizar-Rivas
- Division of Infectious Diseases, University of Rochester Medical Center, 601 Elmwood Avenue, Box 689, Rochester, NY 14642, USA
| | - Harrison W Farber
- Division of Pulmonary, Critical Care, and Sleep Medicine, Tufts Medical Center, 800 Washington Street, Box 257, Boston, MA 02111, USA
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5
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Fernandes CJ, Calderaro D, Assad APL, Salibe-Filho W, Kato-Morinaga LT, Hoette S, Piloto B, Castro MA, Lisboa RP, da Silva TAF, Martins MDA, Alves-Jr JL, Jardim C, Terra-Filho M, de Souza R. Update on the Treatment of Pulmonary Arterial Hypertension. Arq Bras Cardiol 2021; 117:750-764. [PMID: 34709302 PMCID: PMC8528352 DOI: 10.36660/abc.20200702] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/13/2020] [Accepted: 11/04/2020] [Indexed: 11/28/2022] Open
Abstract
In the last decades, important advances have been made in the treatment of pulmonary arterial hypertension (PAH), a severe, progressive, incurable, and potentially fatal disease. For an adequate therapy, correct hemodynamic diagnosis and etiology classification are fundamental. Many etiologies - rheumatic disease, portal hypertension, congenital heart diseases, schistosomiasis - require specific measures, in addition to drug therapy for PAH. The specific therapy for PAH is based on medications that act on three pathophysiological pathways - prostacyclin, endothelin, and nitric oxide pathways. These drugs have multiple presentations (oral, intravenous, subcutaneous, and inhaled) and have changed the history of PAH. This review presents an overview of drug therapy strategies and different forms and peculiarities of PAH.
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Affiliation(s)
- Caio J. Fernandes
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Instituto do CâncerFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilInstituto do Câncer da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
| | - Daniela Calderaro
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Medicina Interdisciplinar - Divisão de Cardiologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
| | - Ana Paula Luppino Assad
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
- Hospital das ClínicasFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilDisciplina de Reumatologia do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
| | - William Salibe-Filho
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
| | - Luciana Tamie Kato-Morinaga
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
| | - Susana Hoette
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
| | - Bruna Piloto
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
| | - Marcela Araújo Castro
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
| | - Roberta Pontes Lisboa
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
| | - Taysa Antonia Felix da Silva
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
| | - Murillo de Araújo Martins
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
| | - Jose L. Alves-Jr
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Instituto do CâncerFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilInstituto do Câncer da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
| | - Carlos Jardim
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
| | - Mario Terra-Filho
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
| | - Rogerio de Souza
- IncorFaculdade de MedicinaUniversidade de São PauloSão PauloSPBrasilUnidade de Circulação Pulmonar - Divisão de Pneumologia – Incor - Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil
- Hospital Sírio-LibanêsSão PauloSPBrasilHospital Sírio-Libanês, São Paulo, SP - Brasil
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6
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Ferraz AP, Seara FAC, Baptista EF, Barenco TS, Sottani TBB, Souza NSC, Domingos AE, Barbosa RAQ, Takiya CM, Couto MT, Resende GO, Campos de Carvalho AC, Ponte CG, Nascimento JHM. BK Ca Channel Activation Attenuates the Pathophysiological Progression of Monocrotaline-Induced Pulmonary Arterial Hypertension in Wistar Rats. Cardiovasc Drugs Ther 2021; 35:719-732. [PMID: 33245463 DOI: 10.1007/s10557-020-07115-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/16/2020] [Indexed: 02/08/2023]
Abstract
PURPOSE In the present study, the therapeutic efficacy of a selective BKCa channel opener (compound X) in the treatment of monocrotaline (MCT)-induced pulmonary arterial hypertension (PAH) was investigated. METHODS PAH was induced in male Wistar rats by a single injection of MCT. After two weeks, the MCT-treated group was divided into two groups that were either treated with compound X or vehicle. Compound X was administered daily at 28 mg/kg. Electrocardiographic, echocardiographic, and haemodynamic analyses were performed; ex vivo evaluations of pulmonary artery reactivity, right ventricle (RV) and lung histology as well as expression levels of α and β myosin heavy chain, brain natriuretic peptide, and cytokines (TNFα and IL10) in heart tissue were performed. RESULTS Pulmonary artery rings of the PAH group showed a lower vasodilatation response to acetylcholine, suggesting endothelial dysfunction. Compound X promoted strong vasodilation in pulmonary artery rings of both control and MCT-induced PAH rats. The untreated hypertensive rats presented remodelling of pulmonary arterioles associated with increased resistance to pulmonary flow; increased systolic pressure, hypertrophy and fibrosis of the RV; prolongation of the QT and Tpeak-Tend intervals (evaluated during electrocardiogram); increased lung and liver weights; and autonomic imbalance with predominance of sympathetic activity. On the other hand, treatment with compound X reduced pulmonary vascular remodelling, pulmonary flow resistance and RV hypertrophy and afterload. CONCLUSION The use of a selective and potent opener to activate the BKCa channels promoted improvement of haemodynamic parameters and consequent prevention of RV maladaptive remodelling in rats with MCT-induced PAH.
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Affiliation(s)
- Ana Paula Ferraz
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Fernando A C Seara
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, Seropedica, RJ, Brazil
| | - Emanuelle F Baptista
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Thais S Barenco
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Thais B B Sottani
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Natalia S C Souza
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Ainá E Domingos
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Raiana A Q Barbosa
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Christina M Takiya
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Marcos T Couto
- Campus Rio de Janeiro, Federal Institute of Education, Science and Technology of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Gabriel O Resende
- Campus Rio de Janeiro, Federal Institute of Education, Science and Technology of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | | | - Cristiano G Ponte
- Campus Rio de Janeiro, Federal Institute of Education, Science and Technology of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Jose Hamilton M Nascimento
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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7
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Krishnan M, Barnett CF. Advances in the diagnosis and treatment of HIV-associated pulmonary arterial hypertension. Expert Opin Orphan Drugs 2020. [DOI: 10.1080/21678707.2020.1770080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Mrinalini Krishnan
- MedStar Heart and Vascular Institute, MedStar Washington Hospital Center, Department of Cardiology, Division of Advanced Heart Failure, Washington, D.C, USA
| | - Christopher F. Barnett
- MedStar Heart and Vascular Institute, MedStar Washington Hospital Center, Department of Cardiology, Division of Advanced Heart Failure, Washington, D.C, USA
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8
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Hester J, Ventetuolo C, Lahm T. Sex, Gender, and Sex Hormones in Pulmonary Hypertension and Right Ventricular Failure. Compr Physiol 2019; 10:125-170. [PMID: 31853950 DOI: 10.1002/cphy.c190011] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pulmonary hypertension (PH) encompasses a syndrome of diseases that are characterized by elevated pulmonary artery pressure and pulmonary vascular remodeling and that frequently lead to right ventricular (RV) failure and death. Several types of PH exhibit sexually dimorphic features in disease penetrance, presentation, and progression. Most sexually dimorphic features in PH have been described in pulmonary arterial hypertension (PAH), a devastating and progressive pulmonary vasculopathy with a 3-year survival rate <60%. While patient registries show that women are more susceptible to development of PAH, female PAH patients display better RV function and increased survival compared to their male counterparts, a phenomenon referred to as the "estrogen paradox" or "estrogen puzzle" of PAH. Recent advances in the field have demonstrated that multiple sex hormones, receptors, and metabolites play a role in the estrogen puzzle and that the effects of hormone signaling may be time and compartment specific. While the underlying physiological mechanisms are complex, unraveling the estrogen puzzle may reveal novel therapeutic strategies to treat and reverse the effects of PAH/PH. In this article, we (i) review PH classification and pathophysiology; (ii) discuss sex/gender differences observed in patients and animal models; (iii) review sex hormone synthesis and metabolism; (iv) review in detail the scientific literature of sex hormone signaling in PAH/PH, particularly estrogen-, testosterone-, progesterone-, and dehydroepiandrosterone (DHEA)-mediated effects in the pulmonary vasculature and RV; (v) discuss hormone-independent variables contributing to sexually dimorphic disease presentation; and (vi) identify knowledge gaps and pathways forward. © 2020 American Physiological Society. Compr Physiol 10:125-170, 2020.
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Affiliation(s)
- James Hester
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care, Occupational and Sleep Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Corey Ventetuolo
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Alpert Medical School of Brown University, Providence, Rhode Island, USA.,Department of Health Services, Policy and Practice, Brown University School of Public Health, Providence, Rhode Island, USA
| | - Tim Lahm
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care, Occupational and Sleep Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA.,Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis, Indiana, USA.,Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana, USA
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9
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Basyal B, Jarrett H, Barnett CF. Pulmonary Hypertension in HIV. Can J Cardiol 2019; 35:288-298. [PMID: 30825951 DOI: 10.1016/j.cjca.2019.01.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/17/2019] [Accepted: 01/17/2019] [Indexed: 12/16/2022] Open
Abstract
Human immunodeficiency virus-associated pulmonary arterial hypertension (HIV-PAH) is important to recognize given its association with significant morbidity and mortality. With the introduction of antiretroviral therapy, the focus of disease management has largely shifted from treating immunodeficiency-related opportunistic infections to managing chronic cardiopulmonary complications. Symptoms are nonspecific, and a high index of clinical suspicion is needed to avoid significant delay in the diagnosis of HIV-PAH. Although several viral proteins have been implicated in the pathogenesis of HIV-PAH, the exact mechanism remains uncertain. Further studies are needed to elucidate precise pathogenic mechanisms, early diagnostic tools, and novel therapeutic targets to improve prognosis of this severe complication.
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Affiliation(s)
- Binaya Basyal
- MedStar Heart and Vascular Institute, Washington Hospital Center, Washington, DC, USA
| | - Harish Jarrett
- MedStar Heart and Vascular Institute, Washington Hospital Center, Washington, DC, USA; MedStar Georgetown University Hospital, Washington, DC, USA
| | - Christopher F Barnett
- MedStar Heart and Vascular Institute, Washington Hospital Center, Washington, DC, USA; MedStar Georgetown University Hospital, Washington, DC, USA.
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10
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Feinstein MJ, Hsue PY, Benjamin L, Bloomfield GS, Currier JS, Freiberg MS, Grinspoon SK, Levin J, Longenecker CT, Post. WS. Characteristics, Prevention, and Management of Cardiovascular Disease in People Living With HIV: A Scientific Statement From the American Heart Association. Circulation 2019; 140:e98-e124. [PMID: 31154814 PMCID: PMC7993364 DOI: 10.1161/cir.0000000000000695] [Citation(s) in RCA: 386] [Impact Index Per Article: 77.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
As early and effective antiretroviral therapy has become more widespread, HIV has transitioned from a progressive, fatal disease to a chronic, manageable disease marked by elevated risk of chronic comorbid diseases, including cardiovascular diseases (CVDs). Rates of myocardial infarction, heart failure, stroke, and other CVD manifestations, including pulmonary hypertension and sudden cardiac death, are significantly higher for people living with HIV than for uninfected control subjects, even in the setting of HIV viral suppression with effective antiretroviral therapy. These elevated risks generally persist after demographic and clinical risk factors are accounted for and may be partly attributed to chronic inflammation and immune dysregulation. Data on long-term CVD outcomes in HIV are limited by the relatively recent epidemiological transition of HIV to a chronic disease. Therefore, our understanding of CVD pathogenesis, prevention, and treatment in HIV relies on large observational studies, randomized controlled trials of HIV therapies that are underpowered to detect CVD end points, and small interventional studies examining surrogate CVD end points. The purpose of this document is to provide a thorough review of the existing evidence on HIV-associated CVD, in particular atherosclerotic CVD (including myocardial infarction and stroke) and heart failure, as well as pragmatic recommendations on how to approach CVD prevention and treatment in HIV in the absence of large-scale randomized controlled trial data. This statement is intended for clinicians caring for people with HIV, individuals living with HIV, and clinical and translational researchers interested in HIV-associated CVD.
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Affiliation(s)
| | - Priscilla Y. Hsue
- University of California-San Francisco School of Medicine, San Francisco, CA
| | | | | | - Judith S. Currier
- University of California-Los Angeles School of Medicine, Los Angeles, CA
| | | | | | - Jules Levin
- National AIDS Treatment Advocacy Program, New York, NY
| | | | - Wendy S. Post.
- Johns Hopkins University School of Medicine, Baltimore, MD
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11
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Abstract
: Improved survival among HIV-1-infected individuals with the advent of antiretroviral therapy has clearly led to a greater prevalence of noninfectious complications. One of the most devastating sequelae in these individuals is the development of pulmonary arterial hypertension (PAH). Various epidemiological studies suggest worse survival of HIV-PAH patients when compared with other forms of PAH. Given that only a subset and not all HIV-infected individuals develop HIV-PAH, it is suggested that an additional second-hit of genetic or environmental trigger is needed for the development of PAH. In this context, it has been well documented that HIV patients who abuse illicit drugs such as stimulants, opioids, and the like, are more susceptible to develop PAH. In this review, we highlight the studies that support the significance of a double hit of HIV and drug abuse in the incidence of PAH and focus on the research that has been undertaken to unravel the pathobiology and vascular remodeling mechanisms underlying the deleterious synergy between HIV infection and drugs of abuse in orchestrating the development of PAH.
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Abstract
PURPOSE OF REVIEW HIV-associated pulmonary arterial hypertension (HIV-PAH) is a well-recognized severe cardiovascular complication of HIV infection that confers an adverse prognosis irrespective of the stage of disease. This review will summarize the available data on HIV-PAH epidemiology and provide insights into the pathophysiology and therapeutic strategies currently available. RECENT FINDINGS Patients with HIV are several thousand times more likely to develop HIV-PAH compared to the incidence of idiopathic PAH. Several HIV viral proteins are implicated in the pathogenesis although the exact mechanism remains unknown. In the past two decades, there have been several new treatment strategies that appear effective in treating HIV-PAH. Novel pathophysiologic mechanisms implicating the transforming growth factor β receptor family may offer novel therapeutic targets in the future. SUMMARY As antiretroviral therapy continues to improve health outcomes for patients with HIV, there needs to be a shift in focus of care toward chronic noncommunicable diseases. Among cardiovascular disease-complicating chronic HIV infection, HIV-PAH is a severe progressive disease that leads to right heart failure and death. Currently available treatment strategies are effective, however, furthering our understanding of HIV-PAH will be critical as it is likely to become the commonest cause of PAH worldwide.
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13
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Marsh LM, Jandl K, Grünig G, Foris V, Bashir M, Ghanim B, Klepetko W, Olschewski H, Olschewski A, Kwapiszewska G. The inflammatory cell landscape in the lungs of patients with idiopathic pulmonary arterial hypertension. Eur Respir J 2018; 51:51/1/1701214. [PMID: 29371380 PMCID: PMC6383570 DOI: 10.1183/13993003.01214-2017] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 10/15/2017] [Indexed: 12/20/2022]
Abstract
Increasing evidence points towards an inflammatory component underlying pulmonary hypertension. However, the conclusive characterisation of multiple inflammatory cell populations in the lung is challenging due to the complexity of marker specificity and tissue inaccessibility. We used an unbiased computational flow cytometry approach to delineate the inflammatory landscape of idiopathic pulmonary arterial hypertension (IPAH) and healthy donor lungs. Donor and IPAH samples were discriminated clearly using principal component analysis to reduce the multidimensional data obtained from single-cell flow cytometry analysis. In IPAH lungs, the predominant CD45+ cell type switched from neutrophils to CD3+ T-cells, with increases in CD4+, CD8+ and γδT-cell subsets. Additionally, diversely activated classical myeloid-derived dendritic cells (CD14−HLA-DR+CD11c+CD1a+/−) and nonclassical plasmacytoid dendritic cells (pDCs; CD14−CD11c−CD123+HLA-DR+), together with mast cells and basophils, were more abundant in IPAH samples. We describe, for the first time, the presence and regulation of two cell types in IPAH, γδT-cells and pDCs, which link innate and adaptive immunity. With our high-throughput flow cytometry with multidimensional dataset analysis, we have revealed the interactive interplay between multiple inflammatory cells is a crucial part of their integrative network. The identification of γδT-cells and pDCs in this disease potentially provides a missing link between IPAH, autoimmunity and inflammation. Computational flow cytometry details the complex inflammatory cell landscape in patients with pulmonary hypertensionhttp://ow.ly/rjFZ30g1tew
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Affiliation(s)
- Leigh M Marsh
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Katharina Jandl
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Gabriele Grünig
- Dept of Environmental Medicine and Medicine, NYU School of Medicine, New York, NY, USA
| | - Vasile Foris
- Division of Pulmonology, Dept of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Mina Bashir
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Bahil Ghanim
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria.,Division of Thoracic Surgery, Dept of Surgery, Medical University of Vienna, Vienna, Austria
| | - Walter Klepetko
- Division of Thoracic Surgery, Dept of Surgery, Medical University of Vienna, Vienna, Austria
| | - Horst Olschewski
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria.,Division of Pulmonology, Dept of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Andrea Olschewski
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria.,Institute of Physiology, Medical University of Graz, Graz, Austria
| | - Grazyna Kwapiszewska
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria.,Institute of Physiology, Medical University of Graz, Graz, Austria
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14
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Manga P, McCutcheon K, Tsabedze N, Vachiat A, Zachariah D. HIV and Nonischemic Heart Disease. J Am Coll Cardiol 2017; 69:83-91. [PMID: 28057254 DOI: 10.1016/j.jacc.2016.09.977] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 09/20/2016] [Indexed: 11/30/2022]
Abstract
Human immunodeficiency virus (HIV)-associated heart disease encompasses a broad spectrum of diseases. HIV infection may involve the pericardium, myocardium, coronary arteries, pulmonary vasculature, and valves, as well as the systemic vasculature. Access to combination antiretroviral therapy, as well as health resources, has had a significant influence on the prevalence and severity of the effects on each cardiac structure. Investigations over the recent past have improved our understanding of the epidemiology and pathophysiology of HIV-associated cardiovascular disease. This review will focus on our current understanding of pathogenesis and risk factors associated with HIV infection and heart disease, and it will discuss relevant advances in diagnosis and management of these conditions.
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Affiliation(s)
- Pravin Manga
- Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa.
| | - Keir McCutcheon
- Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa
| | - Nqoba Tsabedze
- Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa
| | - Ahmed Vachiat
- Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa
| | - Don Zachariah
- Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa
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15
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The Role of Caveolin 1 in HIV Infection and Pathogenesis. Viruses 2017; 9:v9060129. [PMID: 28587148 PMCID: PMC5490806 DOI: 10.3390/v9060129] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 05/02/2017] [Accepted: 05/22/2017] [Indexed: 12/29/2022] Open
Abstract
Caveolin 1 (Cav-1) is a major component of the caveolae structure and is expressed in a variety of cell types including macrophages, which are susceptible to human immunodeficiency virus (HIV) infection. Caveolae structures are present in abundance in mechanically stressed cells such as endothelial cells and adipocytes. HIV infection induces dysfunction of these cells and promotes pathogenesis. Cav-1 and the caveolae structure are believed to be involved in multiple cellular processes that include signal transduction, lipid regulation, endocytosis, transcytosis, and mechanoprotection. Such a broad biological role of Cav-1/caveolae is bound to have functional cross relationships with several molecular pathways including HIV replication and viral-induced pathogenesis. The current review covers the relationship of Cav-1 and HIV in respect to viral replication, persistence, and the potential role in pathogenesis.
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16
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Abstract
INTRODUCTION Since the advent of antiretroviral therapy (ART), non-infectious pulmonary disorders have become common comorbidities in the human immunodeficiency virus (HIV) positive population. Clinicians caring for those with HIV disease should be aware of the prevalence of non-infectious pulmonary disorders. A comprehensive understanding is required to diagnosis and manage these syndromes appropriately. Areas covered: This review focuses on the epidemiology, risk factors, pathogenesis, clinical feature and diagnosis, and treatment of HIV-related chronic obstructive pulmonary disease (COPD), lung cancer, pulmonary hypertension. Expert Commentary: The prevalence of COPD in the HIV population is frequent and requires appropriate diagnosis and treatment. HIV-positive individuals with lung cancer carry a poorer prognosis and require early diagnosis and treatment. A complex condition exists with pulmonary hypertension in the HIV population and requires a high degree of clinical suspicion for early diagnosis.
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Affiliation(s)
- Choua Thao
- a Section of Pulmonary and Critical Care Medicine , MedStar Washington Hospital Center , Washington , DC , USA
| | - Andrew F Shorr
- a Section of Pulmonary and Critical Care Medicine , MedStar Washington Hospital Center , Washington , DC , USA.,b Medical Intensive Care Unit , MedStar Washington Hospital Center , Washington , DC , USA
| | - Christian Woods
- b Medical Intensive Care Unit , MedStar Washington Hospital Center , Washington , DC , USA.,c Sections of Infectious Diseases and Pulmonary/Critical Care Medicine , MedStar Washington Hospital Center , Washington , DC , USA.,d Education, Section of Critical Care Medicine , MedStar Washington Hospital Center , Washington , DC , USA
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17
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Chastain DB, King TS, Stover KR. Infectious and Non-infectious Etiologies of Cardiovascular Disease in Human Immunodeficiency Virus Infection. Open AIDS J 2016; 10:113-26. [PMID: 27583063 PMCID: PMC4994107 DOI: 10.2174/1874613601610010113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 03/01/2016] [Accepted: 05/10/2016] [Indexed: 12/03/2022] Open
Abstract
Background: Increasing rates of HIV have been observed in women, African Americans, and Hispanics, particularly those residing in rural areas of the United States. Although cardiovascular (CV) complications in patients infected with human immunodeficiency virus (HIV) have significantly decreased following the introduction of antiretroviral therapy on a global scale, in many rural areas, residents face geographic, social, and cultural barriers that result in decreased access to care. Despite the advancements to combat the disease, many patients in these medically underserved areas are not linked to care, and fewer than half achieve viral suppression. Methods: Databases were systematically searched for peer-reviewed publications reporting infectious and non-infectious etiologies of cardiovascular disease in HIV-infected patients. Relevant articles cited in the retrieved publications were also reviewed for inclusion. Results: A variety of outcomes studies and literature reviews were included in the analysis. Relevant literature discussed the manifestations, diagnosis, treatment, and outcomes of infectious and non-infectious etiologies of cardiovascular disease in HIV-infected patients. Conclusion: In these medically underserved areas, it is vital that clinicians are knowledgeable in the manifestations, diagnosis, and treatment of CV complications in patients with untreated HIV. This review summarizes the epidemiology and causes of CV complications associated with untreated HIV and provide recommendations for management of these complications.
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Affiliation(s)
- Daniel B Chastain
- Department of Pharmacy, Phoebe Putney Memorial Hospital, 417 3 Avenue W, Albany, GA, USA; Department of Clinical and Administrative Pharmacy, University of Georgia College of Pharmacy, Albany, GA, USA
| | - Travis S King
- Department of Pharmacy Practice, University of Mississippi School of Pharmacy, 2500 North State Street, Jackson, MS, USA
| | - Kayla R Stover
- Department of Pharmacy Practice, University of Mississippi School of Pharmacy, 2500 North State Street, Jackson, MS, USA
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18
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Chinello P, Petrosillo N. Pharmacological treatment of HIV-associated pulmonary hypertension. Expert Rev Clin Pharmacol 2016; 9:715-25. [PMID: 26863919 DOI: 10.1586/17512433.2016.1151785] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Pulmonary arterial hypertension (PAH) is a rare but severe disease that results from chronic obstruction of small pulmonary arteries, leading to right ventricular failure and, ultimately, death. One established risk factor for the development of PAH is HIV infection. The presence of PAH is an independent risk factor for mortality in HIV-infected patients. This article will focus on HIV-associated PAH (HIV-PAH) with special considerations to the available treatments. With the approval of the soluble guanylate cyclase stimulator riociguat, a new drug class has become available in addition to the already existing prostanoids, endothelin receptor antagonists, and phosphodiesterase type 5 inhibitors. Guidelines for the treatment of idiopathic PAH and guidelines for antiretroviral therapy should be followed for the treatment of HIV-PAH.
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Affiliation(s)
- Pierangelo Chinello
- a 2nd Infectious Diseases Unit , "L. Spallanzani" National Institute for Infectious Diseases , Rome , Italy
| | - Nicola Petrosillo
- a 2nd Infectious Diseases Unit , "L. Spallanzani" National Institute for Infectious Diseases , Rome , Italy
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19
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Bigna JJR, Sime PSD, Koulla-Shiro S. HIV related pulmonary arterial hypertension: epidemiology in Africa, physiopathology, and role of antiretroviral treatment. AIDS Res Ther 2015; 12:36. [PMID: 26566389 PMCID: PMC4642627 DOI: 10.1186/s12981-015-0078-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 10/29/2015] [Indexed: 01/28/2023] Open
Abstract
The development of HIV related pulmonary arterial hypertension (PAH) reduces the probability of survival by half as compared with HIV-infected individuals without HIV related PAH. HIV infected patients have a greater incidence of PAH compared to general population and have a 2500-fold increased risk of developing PAH. It is therefore important to have a recent overview of the problem in Africa, the most HIV affected part of the world (70 % of all HIV infection in the world). First, we discussed the epidemiology of HIV-related PAH in Africa. Second, the current understanding of the HIV-related PAH pathogenesis has been covered. Third, role of highly active antiretroviral therapy on HIV-related PAH has been revisited. There are few data concerning epidemiology of HIV related pulmonary hypertension in Africa leading to necessity to conduct further prospective large studies. The prevalence of PAH among HIV infected people in Africa varies from 5 to 13 %. The prevalence of HIV-related PAH in Africa is notably high compared to those in developed countries and in general population. The pathogenesis of PAH is clearly complex, and probably results from the interaction of multiple modulating genes with environmental factors. The physiopathology includes cytokines secretion increase which induces dysregulation of endothelial and vascular smooth muscle cell growth and imbalance of endogenous vasodilators and constrictors; HIV viral proteins which induces vascular oxidative stress, smooth myocyte proliferation and migration, and endothelial injury and genetic predisposition due to some major histocompatibility complex alleles, particularly HDL-DR6 and HLA-DR5. Histologically, HIV related PAH has the same characteristics with other types PAH. Antiretroviral therapy have a beneficial effect on the outcome of HIV related pulmonary hypertension, but it lacks evidence from large prospective studies.
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20
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Schwarze-Zander C, Pabst S, Hammerstingl C, Ohlig J, Wasmuth JC, Boesecke C, Stoffel-Wagner B, Carstensen A, Nickenig G, Strassburg CP, Rockstroh JK, Skowasch D, Schueler R. Pulmonary hypertension in HIV infection: a prospective echocardiographic study. HIV Med 2015; 16:578-82. [PMID: 25960172 DOI: 10.1111/hiv.12261] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2015] [Indexed: 12/27/2022]
Abstract
OBJECTIVES While idiopathic pulmonary arterial hypertension (PAH) is a rare disease, it is seen more frequently in patients with HIV infection. The aim of this study was to evaluate the prevalence of pulmonary hypertension (PH) in patients with HIV infection by echocardiographic screening. METHODS Echocardiography and N-terminal of the prohormone brain natriuretic peptide measurement were used to examine the prevalence of PH prospectively in HIV-positive patients (n = 374) during routine follow-up visits for HIV disease. RESULTS In echocardiographic screening, PH was detected in a total of 23 of 374 HIV-infected patients (6.1%). Of these, three patients (13%) presented with symptoms of dyspnoea and fatigue, and diagnosis of PAH was confirmed by right heart catheterization. Patients with systolic pulmonary artery pressure (sPAP) > 30 mmHg were more likely to be female, to have a history of injecting drug use and to originate from high-prevalence countries (HPCs). CONCLUSIONS Echocardiographic screening detected PH in a substantial proportion of HIV-positive patients. Female gender, a history of injecting drug use and HPC origin were associated with a higher prevalence of HIV-associated PH. The relevance and long-term outcome of these findings need to be validated in follow-up studies, which are ongoing.
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Affiliation(s)
- C Schwarze-Zander
- Department of Internal Medicine I, University Hospital, University of Bonn, Bonn, Germany
| | - S Pabst
- Department of Internal Medicine II, University Hospital, University of Bonn, Bonn, Germany
| | - C Hammerstingl
- Department of Internal Medicine II, University Hospital, University of Bonn, Bonn, Germany
| | - J Ohlig
- Department of Internal Medicine II, University Hospital, University of Bonn, Bonn, Germany
| | - J C Wasmuth
- Department of Internal Medicine I, University Hospital, University of Bonn, Bonn, Germany
| | - C Boesecke
- Department of Internal Medicine I, University Hospital, University of Bonn, Bonn, Germany
| | - B Stoffel-Wagner
- Institute for Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, Bonn, Germany
| | - A Carstensen
- Institute for Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, Bonn, Germany
| | - G Nickenig
- Department of Internal Medicine II, University Hospital, University of Bonn, Bonn, Germany
| | - C P Strassburg
- Department of Internal Medicine I, University Hospital, University of Bonn, Bonn, Germany
| | - J K Rockstroh
- Department of Internal Medicine I, University Hospital, University of Bonn, Bonn, Germany
| | - D Skowasch
- Department of Internal Medicine II, University Hospital, University of Bonn, Bonn, Germany
| | - R Schueler
- Department of Internal Medicine II, University Hospital, University of Bonn, Bonn, Germany
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21
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Correale M, Palmiotti GA, Lo Storto MM, Montrone D, Foschino Barbaro MP, Di Biase M, Lacedonia D. HIV-associated pulmonary arterial hypertension: from bedside to the future. Eur J Clin Invest 2015; 45:515-28. [PMID: 25715739 DOI: 10.1111/eci.12427] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 02/23/2015] [Indexed: 12/27/2022]
Abstract
Pulmonary arterial hypertension (PAH) is a life-threatening complication of HIV infection. The prevalence of HIV-associated PAH (HIV-PAH) seems not to be changed over time, regardless of the introduction of highly active antiretroviral therapy (HAART). In comparison with the incidence of idiopathic PAH in the general population (1-2 per million), HIV-infected patients have a 2500-fold increased risk of developing PAH. HIV-PAH treatment is similar to that for all PAH conditions and includes lifestyle changes, general treatments and specific treatments.
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22
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Overexpression of Endothelin-1 Leads to More Severe Pulmonary Complex Vascular Lesions Associated with the Human Immunodeficiency Virus. Arch Med Res 2015; 46:228-32. [PMID: 25892606 DOI: 10.1016/j.arcmed.2015.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Accepted: 04/06/2015] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND AIMS Despite increase in survival of HIV patients due to highly active antiretroviral therapy (HAART), non-infectious complications are still prevalent such as presentation of lung vasculopathy, even in asymptomatic patients. Endothelin-1 (ET-1) is a potent vasoconstrictor that causes pulmonary vasculopathy. Participation of this protein in the pulmonary circulation in HIV patients has not been elucidated. In this work we studied the presence and expression of ET-1 in pulmonary complex vascular lesions associated with human immunodeficiency virus (PCVL/HIV). METHODS We used immunohistochemistry and immunochemiluminescence (imagej) to determine the different degrees of expression of ET-1 in PCVL/HIV in comparison with non-PCVL/HIV. Reagents used were anti-endothelin-1 and an automated system. All data are presented as mean and standard deviation (SD). Differences were analyzed with one-way ANOVA; p < 0.05 was accepted as statistically significant. RESULTS Lung tissues from 56 patients who died from complications of HIV pulmonary infection and with PCVL were studied. Histological evidence of pulmonary vasculopathy was shown as different types (proliferative, obliterative and plexiform). A statistically significant increase in ET-1 expression was observed in all PCVL/HIV tissue samples and is associated directly with different grades of severity of endothelial dysfunction. CONCLUSIONS ET-1 has a relevant role in the pathogenesis of pulmonary vasculopathy in acquired immunodeficiency syndrome (AIDS) patients. It is necessary to determine in the future the participation of ET-1 and other mechanisms involved in PCVL/HIV.
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Zabini D, Crnkovic S, Xu H, Tscherner M, Ghanim B, Klepetko W, Olschewski A, Kwapiszewska G, Marsh LM. High-mobility group box-1 induces vascular remodelling processes via c-Jun activation. J Cell Mol Med 2015; 19:1151-61. [PMID: 25726846 PMCID: PMC4420616 DOI: 10.1111/jcmm.12519] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 11/24/2014] [Indexed: 12/20/2022] Open
Abstract
Extracellular high-mobility group box-1 (HMGB1) acts as a signalling molecule during inflammation, cell differentiation and angiogenesis. Increased abundance of HMGB1 is associated with several pathological disorders such as cancer, asthma and chronic obstructive pulmonary disease (COPD). In this study, we investigated the relevance of HMGB1 in the pathological remodelling present in patients with idiopathic pulmonary arterial hypertension (IPAH) and pulmonary hypertension (PH) associated with COPD. Remodelled vessels present in COPD with PH and IPAH lung samples were often surrounded by HMGB1-positive cells. Increased HMGB1 serum levels were detected in both patient populations compared to control samples. The effects of physiological HMGB1 concentrations were then examined on cellular responses in vitro. HMGB1 enhanced proliferation of pulmonary arterial smooth muscle cells (PASMC) and primary human arterial endothelial cells (PAEC). HMGB1 stimulated p38, extracellular signal-regulated kinase (ERK) and c-Jun N-terminal kinase (JNK) phosphorylation. Furthermore, activation of the downstream AP-1 complex proteins c-Fos and c-Jun was observed. Silencing of c-Jun ablated the HMGB1-induced proliferation in PASMC. Thus, an inflammatory component such as HMGB1 can contribute to PASMC and PAEC proliferation and therefore potentially to vascular remodelling and PH pathogenesis.
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Affiliation(s)
- Diana Zabini
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
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24
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A global perspective on the epidemiology of pulmonary hypertension. Can J Cardiol 2015; 31:375-81. [PMID: 25840090 DOI: 10.1016/j.cjca.2015.01.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 01/28/2015] [Accepted: 01/28/2015] [Indexed: 01/04/2023] Open
Abstract
The epidemiology of pulmonary hypertension (PH) is not fully determined worldwide but is believed to vary in different regions of the world, with differences determined by genetic, geographic, environmental, and socioeconomic factors, as well as sex-related practices and inequities in access to health care. This article reviews the global epidemiology of PH, with emphasis on the prevalence, causes, forms, and underlying factors in the developing world. Left ventricular heart disease is the most common cause worldwide, but the main contributors in developing countries are chronic infectious diseases, hypertensive heart disease, cardiomyopathy, and rheumatic heart disease. Despite data suggesting a high prevalence in Sub-Saharan Africa, the available literature is very limited. International registries like the Pan African Pulmonary Hypertension Cohort are essential to provide information about the causes, comorbidities, and diagnostic classification, therapeutic management, and the natural course of PH worldwide. Moreover, there is a need to track diagnostic and management practices and challenges to identify the gaps and gradients between different regions of the world. The information gained will pinpoint areas for improvement, aiming at bridging the current divide between low-income and high-income countries.
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25
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Sandoval-Gutiérrez JL, Santos-Martínez LE, Rodríguez-Silverio J, Baranda-Tovar FM, Rivera-Rosales RM, Flores-Murrieta FJ. [Pulmonary arterial hypertension associated to human immunodeficiency virus]. ARCHIVOS DE CARDIOLOGIA DE MEXICO 2015; 85:118-23. [PMID: 25577549 DOI: 10.1016/j.acmx.2014.10.003] [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: 12/10/2013] [Revised: 10/17/2014] [Accepted: 10/18/2014] [Indexed: 11/27/2022] Open
Abstract
From the advent of the highly effective antiretroviral treatment, the life expectancy of patients with human immunodeficiency virus has increased significantly. At present, the causes of death are non-infectious complications. Between them, the pulmonary arterial hypertension has a special importance. It is important early detection to establish the therapeutic, with the objective of preventing a fatal outcome to future.
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Affiliation(s)
- José Luis Sandoval-Gutiérrez
- Departamento de Urgencias Respiratorias, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Secretaría de Salubridad y Asistencia, México, D.F., México
| | - Luis Efren Santos-Martínez
- Departamento de Hipertensión Pulmonar y Función Ventricular Derecha, UMAE Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México, D.F., México.
| | - Juan Rodríguez-Silverio
- Departamento de Farmacología, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Secretaría de Salubridad y Asistencia, México, D.F., México
| | - Francisco Martín Baranda-Tovar
- Departamento de Cuidados Intensivos Posquirúrgicos Cardiovasculares, Instituto Nacional de Cardiología Ignacio Chávez, Secretaría de Salubridad y Asistencia, México, D.F., México
| | - Rosa María Rivera-Rosales
- Departamento de Patología, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Secretaría de Salubridad y Asistencia, México, D.F., México
| | - Francisco Javier Flores-Murrieta
- Departamento de Farmacología, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Secretaría de Salubridad y Asistencia, México, D.F., México
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L'Huillier AG, Posfay-Barbe KM, Pictet H, Beghetti M. Pulmonary Arterial Hypertension among HIV-Infected Children: Results of a National Survey and Review of the Literature. Front Pediatr 2015; 3:25. [PMID: 25905096 PMCID: PMC4387937 DOI: 10.3389/fped.2015.00025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 03/19/2015] [Indexed: 01/07/2023] Open
Abstract
Since the advent of highly active anti-retroviral therapy, HIV-related mortality has decreased dramatically. As a consequence, patients are living longer, and HIV infection is becoming a chronic disease. Patients and caretakers have to deal with chronic complications of infection and treatment, such as cardiovascular diseases, which now represent an important health issue, even in the pediatric population. Prevalence of pulmonary arterial hypertension (PAH) in the adult HIV population is around 0.4-0.6%, which is around 1000- to 2500-fold more prevalent than in the general population. In recent adult PAH registries, HIV has been identified as the fourth cause of PAH, accounting for approximately 6-7% of cases. Therefore, regular screening is recommended in HIV-infected adults by many experts. If HIV-associated PAH is mainly reported in HIV-infected adults, pediatric cases have also been, albeit rarely, described. This scarcity may be due to a very low PAH prevalence, or due to the lack of systematic cardiovascular screening in pediatric patients. As PAH may manifest only years or decades after infection, a systematic screening should perhaps also be recommended to HIV-infected children. In this context, we retrospectively looked for PAH screening in children included in our national Swiss Mother and Child HIV cohort study. A questionnaire was sent to all pediatric infectious disease specialists taking care of HIV-infected children in the cohort. The questions tried to identify symptoms suggestive of cardiovascular risk factors and asked which screening test was performed. In the 71 HIV-infected children for which we obtained an answer, no child was known for PAH. However, only two had been screened for PAH, and the diagnosis was not confirmed. In conclusion, PAH in HIV-infected children is possibly underestimated due to lack of screening. Systematic echocardiographic evaluation should be performed in HIV-infected children.
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Affiliation(s)
- Arnaud Grégoire L'Huillier
- Pediatric Infectious Diseases Unit, Department of Pediatrics, Geneva University Hospitals , Geneva , Switzerland
| | - Klara Maria Posfay-Barbe
- Pediatric Infectious Diseases Unit, Department of Pediatrics, Geneva University Hospitals , Geneva , Switzerland
| | - Hiba Pictet
- Faculty of Medicine, University of Geneva , Geneva , Switzerland
| | - Maurice Beghetti
- Pediatric Cardiology Unit, Department of Pediatrics, Geneva University Hospitals , Geneva , Switzerland
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Araújo I, Enjuanes-Grau C, Lopez-Guarch CJ, Narankiewicz D, Ruiz-Cano MJ, Velazquez-Martin T, Delgado J, Escribano P. Pulmonary arterial hypertension related to human immunodeficiency virus infection: A case series. World J Cardiol 2014; 6:495-501. [PMID: 24976921 PMCID: PMC4072839 DOI: 10.4330/wjc.v6.i6.495] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Revised: 02/21/2014] [Accepted: 05/08/2014] [Indexed: 02/07/2023] Open
Abstract
AIM: To present 18 new cases of human immunodeficiency virus (HIV)-related pulmonary arterial hypertension (PAH) with presenting features, treatment options and follow-up data.
METHODS: This is a single-centre, retrospective, observational study that used prospectively collected data, conducted during a 14-year period on HIV-related PAH patients who were referred to a pulmonary hypertension unit. All patients infected with HIV were consecutively admitted for an initial evaluation of PAH during the study period and included in our study. Right heart catheterisation was used for the diagnosis of PAH. Specific PAH treatment was started according to the physician’s judgment and the recommendations for idiopathic PAH. The data collected included demographic characteristics, parameters related to both HIV infection and PAH and disease follow-up.
RESULTS: Eighteen patients were included. Intravenous drug use was the major risk factor for HIV infection. Risk factors for PAH, other than HIV infection, were present in 55.5% patients. The elapsed time between HIV infection and PAH diagnoses was 12.2 ± 6.9 years. At PAH diagnosis, 94.1% patients had a CD4 cell count > 200 cells/μL. Highly active antiretroviral therapy (present in 47.1% patients) was associated with an accelerated onset of PAH. Survival rates were 93.8%, 92.9% and 85.7% at one, two and three years, respectively. Concerning specific therapy, 33.3% of the patients were started on a prostacyclin analogue, and the rest were on oral drugs, mainly phosphodiesterase-5 inhibitors. During the follow-up period, specific therapy was de-escalated to oral drugs in all of the living patients.
CONCLUSION: The survival rates of HIV-related PAH patients were higher, most likely due to new aggressive specific therapy. The majority of patients were on oral specific therapy and clinically stable. Moreover, sildenafil appears to be a safe therapy for less severe HIV-related PAH.
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Prevalence and severity of ventricular dysfunction in patients with HIV-related pulmonary arterial hypertension. Heart Lung 2014; 43:256-61. [DOI: 10.1016/j.hrtlng.2014.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 02/10/2014] [Accepted: 02/12/2014] [Indexed: 12/23/2022]
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Mayaud C, Cadranel J. Le poumon du VIH de 1982 à 2013. Rev Mal Respir 2014; 31:119-32. [DOI: 10.1016/j.rmr.2013.09.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 07/11/2013] [Indexed: 10/26/2022]
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Colvin KL, Yeager ME. Animal Models of Pulmonary Hypertension: Matching Disease Mechanisms to Etiology of the Human Disease. ACTA ACUST UNITED AC 2014; 4. [PMID: 25705569 PMCID: PMC4334132 DOI: 10.4172/2161-105x.1000198] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Recently a great deal of progress has been made in our understanding of pulmonary hypertension (PH). Research from the past 30 years has resulted in newer treatments that provide symptomatic improvements and delayed disease progression. Unfortunately, the cure for patients with this lethal syndrome remains stubbornly elusive. With the relative explosion of scientific literature regarding PH, confusion has arisen regarding animal models of the disease and their correlation to the human condition. This short review uniquely focuses on the clear and present need to better correlate mechanistic insights from existing and emerging animal models of PH to specific etiologies and histopathologies of human PH. A better understanding of the pathologic processes in various animal models and how they relate to the human disease should accelerate the development of newer and more efficacious therapies.
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Affiliation(s)
- Kelley L Colvin
- Deptartment of Pediatrics-Critical Care, University of Colorado Denver, USA ; Cardiovascular Pulmonary Research, USA ; Department of Bioengineering, University of Colorado Denver, USA ; Linda Crnic Institute for Down Syndrome, USA
| | - Michael E Yeager
- Deptartment of Pediatrics-Critical Care, University of Colorado Denver, USA ; Cardiovascular Pulmonary Research, USA ; Department of Bioengineering, University of Colorado Denver, USA ; Linda Crnic Institute for Down Syndrome, USA
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31
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Updated Clinical Classification of Pulmonary Hypertension. J Am Coll Cardiol 2013; 62:D34-41. [DOI: 10.1016/j.jacc.2013.10.029] [Citation(s) in RCA: 2067] [Impact Index Per Article: 187.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 10/22/2013] [Indexed: 12/13/2022]
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McLaughlin VV, Palevsky HI. Parenteral and inhaled prostanoid therapy in the treatment of pulmonary arterial hypertension. Clin Chest Med 2013; 34:825-40. [PMID: 24267307 DOI: 10.1016/j.ccm.2013.09.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Since continuous IV epoprostenol was approved in the U.S., parenteral prostanoid therapy has remained the gold standard for the treatment of patients with advanced pulmonary arterial hypertension (PAH). Prostanoid agents can be administered as continuous intravenous infusions, as continuous subcutaneous infusions and by intermittent nebulization therapy. This article presents data from clinical trials of available prostanoid agents, and their varied routes of administration. The varied routes of administration allow for the incremental use of this class of agents in advanced PAH, and if PAH progresses. Prostanoids will remain a major component of PAH therapy for the foreseeable future.
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Affiliation(s)
- Vallerie V McLaughlin
- Pulmonary Hypertension Program, Cardiovascular Center, University of Michigan Hospital and Health Systems, 1500 East Medical Center Drive, Room 2392, Ann Arbor, MI 48109-5853, USA
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Abstract
Accurate diagnosis of pulmonary arterial hypertension can be challenging and often requires a high index of clinical suspicion. Use of a variety of noninvasive tests can help define the population of patients in whom invasive cardiac catheterization should be pursued. An understanding of the historical, physical exam, electrocardiographic, radiographic, and echocardiographic clues in the diagnosis is important. A ventilation-perfusion scan and careful assessment for left-to-right shunting are mandatory to avoid missing reasons for pulmonary hypertension that may require nonpharmacologic management. Right heart, and sometimes concomitant left heart, catheterization is required to establish the diagnosis and distinguish pulmonary arterial from pulmonary venous hypertension.
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Affiliation(s)
- Paul R Forfia
- Division of Cardiovascular Medicine, Pulmonary Hypertension and Right Heart Failure Program, Temple University Hospital, 3401 North Broad Street, 9th Floor, Parkinson Pavillion, Philadelphia, PA 19140, USA.
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Isiguzo GC, Okeahialam BN, Danbauchi SS, Odili AN, Iroezindu MO, Placid U. Contributions of pulmonary hypertension to HIV-related cardiac dysfunction. Indian Heart J 2013; 65:644-9. [PMID: 24206894 PMCID: PMC3860612 DOI: 10.1016/j.ihj.2013.08.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 04/25/2013] [Accepted: 08/10/2013] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND/AIM To evaluate the prevalence of pulmonary hypertension among patients living with HIV/AIDS and to determine its contribution to cardiac dysfunction. METHOD A hospital based cross sectional study was carried out over a 6-month period at the Jos University Teaching Hospital. The subjects were 200 confirmed HIV positive patients, ≥18 years of age who consented to the study. Physical examination, laboratory investigations, 2 dimensional and Doppler echocardiography were conducted on the subjects. RESULTS The mean age of the patients was 38 ± 9 years, and there were 142 females (71%). Females were younger, mean age 36 ± 8 years versus 41 ± 10 years for males (p-value <0.01). The median CD4 cell count was 312 cells/μl, there were no homosexual or intravenous drug user among the subjects. Eight of the subjects had pulmonary hypertension, with a case prevalence of 4%, and this had no relationship to CD4 cell count. Both systolic and diastolic functions were worse in subjects with pulmonary hypertension, with a negative correlation between mean pulmonary arterial systolic pressure (mPASP) and parameters like ejection fraction (r = -0.28, p-value 0.0003), fractional shortening (r = -0.21, p-value 0.003), deceleration time (r = -0.13. p-value 0.09). CONCLUSION Immune-suppression affects the cardiac function adversely and coexisting pulmonary hypertension contributes to poor systolic and diastolic function in affected patients. The subtle nature of presentation of pulmonary hypertension and other cardiac dysfunctions in HIV/AIDS patients demand a high-index of suspicion and early intervention if detected, to ensure better care for these emerging threats to our patients.
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MESH Headings
- Adult
- Age Distribution
- Comorbidity
- Cross-Sectional Studies
- Disease Progression
- Echocardiography, Doppler
- Female
- Follow-Up Studies
- HIV Infections/diagnosis
- HIV Infections/drug therapy
- HIV Infections/epidemiology
- Heart Failure, Diastolic/diagnosis
- Heart Failure, Diastolic/epidemiology
- Heart Failure, Systolic/diagnosis
- Heart Failure, Systolic/epidemiology
- Humans
- Hypertension, Pulmonary/diagnosis
- Hypertension, Pulmonary/epidemiology
- Hypertension, Pulmonary/therapy
- Male
- Middle Aged
- Prevalence
- Reference Values
- Risk Assessment
- Severity of Illness Index
- Sex Distribution
- Stroke Volume/physiology
- Survival Analysis
- Ventricular Dysfunction, Left/diagnostic imaging
- Ventricular Dysfunction, Left/epidemiology
- Ventricular Dysfunction, Left/physiopathology
- Young Adult
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Affiliation(s)
- Godsent C Isiguzo
- Internal Medicine Department, Federal Teaching Hospital Abakaliki, Ebonyi State, Nigeria.
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Human immunodeficiency virus and pulmonary arterial hypertension. ISRN CARDIOLOGY 2013; 2013:903454. [PMID: 24027641 PMCID: PMC3763567 DOI: 10.1155/2013/903454] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 07/23/2013] [Indexed: 11/19/2022]
Abstract
Human immunodeficiency virus- (HIV-) related pulmonary arterial hypertension (PAH) is a rare complication of HIV infection. The pathophysiology of HIV-related PAH is complex, with viral proteins seeming to play the major role. However, other factors, such as coinfection with other microorganisms and HIV-related systemic inflammation, might also contribute. The clinical presentation of HIV-related PAH and diagnosis is similar to other forms of pulmonary hypertension. Both PAH-specific therapies and HAART are important in HIV-related PAH management. Future studies investigating the pathogenesis are needed to discover new therapeutic targets and treatments.
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Barnett CF, Hsue PY. Human immunodeficiency virus-associated pulmonary arterial hypertension. Clin Chest Med 2013; 34:283-92. [PMID: 23702177 DOI: 10.1016/j.ccm.2013.01.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Antiretroviral therapy has greatly increased longevity for individuals with human immunodeficiency virus (HIV) infection. About 0.5% of patients with HIV infection develop moderate to severe pulmonary arterial hypertension, which is several thousand times higher than the incidence of idiopathic pulmonary arterial hypertension. As more than 30 million individuals are chronically infected, HIV infection could soon become one of the most common causes of pulmonary arterial hypertension worldwide. Pulmonary arterial hypertension is a relentlessly progressive disease leading to right heart failure and death. In this article the available data on epidemiology, hemodynamics, mechanisms, and therapeutic strategies for HIV-associated pulmonary arterial hypertension are reviewed.
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Affiliation(s)
- Christopher F Barnett
- Division of Cardiology, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
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Olalla J, Urdiales D, Pombo M, del Arco A, de la Torre J, Prada JL. [Pulmonary hypertension in human immunodeficiency virus-infected patients: the role of antiretroviral therapy]. Med Clin (Barc) 2013; 142:248-52. [PMID: 23490486 DOI: 10.1016/j.medcli.2012.12.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 12/19/2012] [Accepted: 12/20/2012] [Indexed: 10/27/2022]
Abstract
BACKGROUND AND OBJECTIVE Pulmonary arterial hypertension (PAH) is a serious disorder, more prevalent in patients infected with human immunodeficiency virus (HIV). It is not entirely clear what role is played by highly active antiretroviral therapy (HAART) in PAH development or course. Our aim was to describe PAH prevalence in a series of HIV-infected patients and identify possible links with cumulative and current use of different antiretrovirals. PATIENTS AND METHOD Cross-sectional study of a cohort of HIV-infected patients attending a hospital in southern Spain. Demographic data, data on HIV infection status and on cumulative and recent antiretroviral treatment were recorded. Transthoracic echocardiography was performed in all study participants. PAH was defined as pulmonary artery systolic pressure of 36mmHg or more. RESULTS A total of 400 patients participated in the study; 178 presented with tricuspid regurgitation and 22 of these presented with PAH (5.5%). No differences were encountered in age, sex, CD4 lymphocytes, proportion of naive patients or patients with AIDS. No differences were encountered in cumulative use of antiretrovirals. However, recent use of lamivudine was associated with a greater presence of PAH, whereas recent use of tenofovir and emtricitabine was associated with a lower presence of PAH. Logistic regression analysis was performed including the use of lamivudine, emtricitabine and tenofovir. Only recent use of tenofovir was associated with a lower presence of PAH (odds ratio 0.31; 95% confidence interval: 0.17-0.84). CONCLUSIONS PAH prevalence in our study was similar to others series. Current use of tenofovir may be associated with lower PAH prevalence.
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Affiliation(s)
- Julián Olalla
- Unidad de Medicina Interna, Hospital Costa del Sol, Marbella, Málaga, España.
| | - Daniel Urdiales
- Unidad de Medicina Interna, Hospital Costa del Sol, Marbella, Málaga, España
| | - Marta Pombo
- Área de Cardiología, Hospital Costa del Sol, Marbella, Málaga, España
| | - Alfonso del Arco
- Unidad de Medicina Interna, Hospital Costa del Sol, Marbella, Málaga, España
| | - Javier de la Torre
- Unidad de Medicina Interna, Hospital Costa del Sol, Marbella, Málaga, España
| | - José Luis Prada
- Unidad de Medicina Interna, Hospital Costa del Sol, Marbella, Málaga, España
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Abstract
BACKGROUND Risk factors of pulmonary hypertension (PH) are poorly understood. The objective of this study was to identify the determinants of PH in young adults. METHODS We analysed a limited access dataset from the CARDIA (Coronary Artery Risk Development in Young Adults) study provided by the National Heart, Lung and Blood Institute. Pulmonary arterial pressure was assessed by the Doppler pulmonary artery acceleration time (PAAT). Socio-demographic characteristics, self-reported clinical variables, echocardiographic variables, pulmonary function tests, systemic blood pressure and body mass index calculated from height and weight were used in multivariate analysis. RESULTS There were 4171 study subjects, mean age 24.9 ± 3.6 years, retained in year five with echocardiographic data available after five years of follow-up. The prevalence of severe PH (PAAT ≤ 70 ms) and mild to moderate PH (PAAT = 109.9-70.01 ms) was 1.1% and 14% respectively. Multivariate analysis revealed that body mass index (β = -1.09, p < 0.0001), female gender (β = 6.25, p < 0.0001), age (β = -0.30, p = 0.02), African American race (β = -2.57, p = 0.007), physical activity (β = 0.005, p = 0.002), current smoking (β = -3.42, p = 0.001), left atrial dimension (β = -2.97, p = 0.009) and diastolic dysfunction (β = -13.06, p = 0.006) were statistically significant variables predicting PH. CONCLUSION In this large, observational study of young adults, pulmonary hypertension, as assessed by echocardiography, is common. Diastolic dysfunction, obesity, physical inactivity and smoking are associated with elevated pulmonary arterial pressure in young adults.
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Affiliation(s)
- Maya Guglin
- Department of Cardiology, University of South Florida, Tampa, FL, USA.
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Abstract
Pulmonary hypertension (PH) can develop in association with many different diseases and risk factors, and its presence is nearly always associated with reduced survival. The prognosis and management of PH is largely dependent upon its underlying etiology and severity of disease. The combination of clinical and hemodynamic classifications of PH provides a framework for the diagnostic evaluation of PH to establish a final clinical diagnosis that guides therapy. As our understanding of the different pathologic mechanisms that underlie the syndrome of PH evolves, so too will the classification and treatment of PH.
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Affiliation(s)
- Dana McGlothlin
- Division of Cardiology, UCSF Medical Center, University of California-San Francisco, 505 Parnassus Avenue, San Francisco, CA 94143-0124, USA.
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Abstract
Pulmonary arterial hypertension (PAH) is a severe condition that markedly reduces exercise capacity and survival in the affected patient population. PAH includes primary pulmonary hypertension (PPH) and pulmonary hypertension associated with collagen vascular diseases, congenital systemic-to-pulmonary shunts, portal hypertension and HIV infection. All these conditions share virtually identical obstructive pathologic changes of the pulmonary microcirculation and probably similar pathobiologic processes. The pathophysiology is characterized by a progressive increase in pulmonary vascular resistance, leading to right ventricular failure and death. Prostacyclin is an endogenous substance that is produced by vascular endothelial cells and induces vasodilatation, inhibition of platelet activity, and antiproliferative effects. A dysregulation of prostacyclin metabolic pathways has been shown in patients with PAH and this represents the rationale for the exogenous therapeutic administration of this substance. The clinical use of prostacyclin in patients with PAH has been made possible by the synthesis of stable analogs that possess different pharmacokinetic properties but share similar pharmacodynamic effects. Experience in humans has been initially collected with epoprostenol, which is a synthetic salt of prostacyclin. Epoprostenol has a short half-life in the circulation and requires continuous administration by the intravenous route by means of infusion pumps and permanent tunnelized catheters. In addition, epoprostenol is unstable at room temperature, and the complex delivery system required is associated with several adverse effects and potentially serious complications. For these reasons, alternatives to intravenous epoprostenol have been sought and this has led to the development of analogs that can be administered subcutaneously (treprostinil), orally (beraprost sodium) or by inhalation (iloprost). Three unblinded clinical trials and several uncontrolled trials have shown that treatment with epoprostenol improved symptoms and exercise capacity in New York Heart Association (NYHA) class III and IV PAH patients and also survival in patients with PPH. Subcutaneous treprostinil improved symptoms, exercise, hemodynamics and clinical events in the largest clinical trial ever performed in PAH, but local infusion site reactions limited efficacy in a proportion of patients. Oral beraprost sodium improved exercise capacity only in patients with PPH and is the only prostacyclin analog that has also been tested in NYHA class II patients. Inhaled iloprost has improved symptoms, exercise capacity and clinical events in patients with PAH and inoperable chronic thromboembolic pulmonary hypertension. The favorable effects of prostanoids observed in all studies coupled with different profiles of adverse events and tolerability for each prostacyclin analog allow the unique opportunity to select the most appropriate compound for the individual patient with PAH.
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Affiliation(s)
- Nazzareno Galiè
- Institute of Cardiology, University of Bologna, Bologna, Italy.
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Prevalence and risk factors associated with pulmonary hypertension in HIV-infected patients on regular follow-up. AIDS 2012; 26:1387-92. [PMID: 22526521 DOI: 10.1097/qad.0b013e328354f5a1] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Pulmonary arterial hypertension (PAH) is uncommon among HIV-positive patients. However, it is a potentially life-threatening condition. Transthoracic echocardiography (TTE) is a noninvasive tool validated for PAH screening. The aim of our study was to establish the prevalence and factors associated with PAH in HIV-infected patients. METHODS Consecutive HIV-infected individuals attended at one HIV reference clinic in Madrid, Spain, during year 2011 were examined. Demographics and clinical data were recorded and a Doppler echocardiography was performed in all individuals. PAH was considered when right ventricular pressure was more than 35 mmHg (mild if <40 mmHg, moderate if 40-65 mmHg, and severe if >65 mmHg). RESULTS Three hundred and ninety-two individuals were examined (83.4% men, median age 47 years, 53% were men who have sex with men and 53% former intravenous drug addicts). Overall, 84% were on HAART, 76% had undetectable HIV viral load and median CD4 cell counts were 577 cells/μl. Cardiovascular risk factors were smoking 50%, arterial hypertension 16% and diabetes mellitus 9%. A total of 28.5 and 4.8% had chronic hepatitis C (CHC) and 4.8% chronic hepatitis B, respectively. PAH was diagnosed in 9.9% of patients (6.4% mild, 2.8% moderate and 0.8% severe). Multivariate logistic regression analysis [odds ratio (OR), 95% confidence interval (CI)] showed that detectable plasma HIV-RNA [OR, 3.3; 95% CI, 1.04-10], CHC [OR, 3.1; 95% CI 1.2-8.2] and female sex [OR, 2.9; 95% CI, 1.04-8.3] were independently associated with PAH. CONCLUSION The prevalence of PAH HIV-infected patients on regular follow-up approaches 10%, being moderate-severe in nearly 4% of cases. Patients with CHC and/or uncontrolled HIV replication exhibit a higher risk of PAH.
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Soto-Abánades CI, Alcolea-Batres S, Ríos-Blanco JJ. [Pulmonary hypertension in patients infected with human immunodeficiency virus: current situation]. Enferm Infecc Microbiol Clin 2012; 31:461-70. [PMID: 22784689 DOI: 10.1016/j.eimc.2012.05.001] [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: 10/11/2011] [Revised: 02/26/2012] [Accepted: 05/04/2012] [Indexed: 11/16/2022]
Abstract
The increase in survival that has been achieved with the new treatments in the era of highly active antiretroviral therapy, has enabled clinicians and researchers to analyze issues that emerge in the long term in patients with HIV infection. Although the majority of cardiovascular complications have been widely described, the pathogenesis of pulmonary arterial hypertension is still poorly understood, and is one of the more complex and feared complications as it worsens the prognosis and quality of life of these patients This article reviews newer aspects related to the aetiology, symptoms, diagnosis and treatment of this disease.
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Affiliation(s)
- Clara Itzíar Soto-Abánades
- Servicio de Medicina Interna, Unidad de Enfermedades Infecciosas y Microbiología Clínica, Grupo Multidisciplinar de Hipertensión Pulmonar, Hospital Universitario La Paz, Madrid, España.
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Doukky R, Lee WY, Ravilla M, Lateef OB, Pelaez V, French A, Tandon R. A novel expression of exercise induced pulmonary hypertension in human immunodeficiency virus patients: a pilot study. Open Cardiovasc Med J 2012; 6:44-9. [PMID: 22550549 PMCID: PMC3339433 DOI: 10.2174/1874192401206010044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Revised: 02/21/2012] [Accepted: 02/27/2012] [Indexed: 11/22/2022] Open
Abstract
Background:
Patients with the human immunodeficiency virus (HIV) are at risk for multiple pulmonary complications including pulmonary hypertension. Exercise induced pulmonary hypertension (EIPH) has been previously described in patients with scleroderma, sickle cell disease and chronic obstructive pulmonary disease, yet has not been associated with the HIV population. Methods:
A prospective case-control study design was implemented. Four HIV patients with unexplained dyspnea and four healthy controls underwent symptom-limited stationary bicycle exercise. Transthoracic Doppler Echocardiography was used to measure tricuspid regurgitation velocity which was used to calculate the right ventricular to right atrial pressure (RV-RA) gradient at rest and at peak exercise using the simplified Bernoulli’s equation. Change in RV-RA gradient between rest and peak exercise was calculated and considered to represent change in pulmonary arterial systolic pressure. Results:
The mean age was 41.25 years (±8.7) for patients and 33.5 years (±6.0) for controls. The mean CD4 count of patients was 191.5 cells/μL (±136.2). Patients had a significantly higher increase in RV-RA gradient as compared to controls (180.2% vs. 27.5%, p = 0.03). Discussion:
This pilot study suggests that it is feasible to use recumbent bicycle and transthoracic Doppler echocardiography for the evaluation of EIPH among HIV patients with dyspnea of unknown etiology. The study is too small to draw any broad conclusion. Further evaluation of this concept with a larger study is warranted.
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Affiliation(s)
- Rami Doukky
- Rush University Medical Center, Department of Medicine, Section of Cardiology, 1653 W. Congress Pkwy, Jelke 1015, Chicago, IL 60612, USA
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L’hypertension artérielle pulmonaire associée au VIH. Rev Mal Respir 2012; 29:491-500. [DOI: 10.1016/j.rmr.2011.09.050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Accepted: 09/19/2011] [Indexed: 11/20/2022]
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Pathogenesis of HIV-associated pulmonary hypertension: potential role of HIV-1 Nef. Ann Am Thorac Soc 2011; 8:308-12. [PMID: 21653533 DOI: 10.1513/pats.201006-046wr] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Infection with HIV increases the risk for lung diseases, including noninfectious pulmonary hypertension (PH). HIV-associated PH (HIV-PH) is an important lung disease in HIV-infected persons who live longer with antiretrovirals. The early stages of HIV-PH may be overlooked by healthcare providers due to nonspecific symptoms, including progressive dyspnea and nonproductive cough. HIV-PH may be detected via chest radiographs, CT scans, or electrocardiograms, but Doppler echocardiography is the most useful screening test to identify candidates for right heart catheterization. HIV-PH has a poor prognosis with high mortality; improved biomarkers to identify earlier stages of PH would benefit clinical care. The HIV-PH mechanism remains unknown, but HIV proteins such as Tat and Nef may play a role. HIV-1 Nef is a broad-spectrum adaptor protein that may affect HIV-infected and uninfected pulmonary vascular cells. Studies in macaques suggest that Nef is important in HIV-PH pathogenesis because monkeys infected with a chimeric simian immunodeficiency virus (SIV) expressing HIV-nef (SHIVnef) alleles, but not monkeys infected with the native SIV, develop pulmonary vascular remodeling. Four consistent amino acid mutations arose spontaneously in Nef passaged in the monkeys. To translate these findings to humans, one research endeavor of the Lung HIV Study focuses on the identification of HIV nef mutations in HIV-infected individuals with PH compared with HIV-infected normotensive patients. We present some of the preliminary evidence. Ongoing longitudinal studies will establish the connection between Nef mutations and the propensity for HIV-PH.
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Cicalini S, Chinello P, Petrosillo N. HIV infection and pulmonary arterial hypertension. Expert Rev Respir Med 2011; 5:257-66. [PMID: 21510735 DOI: 10.1586/ers.11.10] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Pulmonary arterial hypertension (PAH) is a rare but severe disease that results from chronic obstruction of small pulmonary arteries, leading to right ventricular failure and, ultimately, death. One established risk factor for the development of PAH is HIV infection. In comparison with the incidence of idiopathic PAH in the general population (1-2 per million), HIV-infected patients have a 2500-fold increased risk of developing PAH. The presence of PAH is an independent risk factor for mortality in patients with HIV infection, and in most cases death is causally related to PAH rather than to other complications of HIV infection. This article will focus on HIV-PAH with special considerations to epidemiology, pathogenesis, clinical presentation, diagnostic approach and available treatments.
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Affiliation(s)
- Stefania Cicalini
- Second Infectious Diseases Division, National Institute for Infectious Diseases Lazzaro Spallanzani Via Portuense 292, 00149 Rome, Italy.
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Abstract
Pulmonary hypertension (PH) is a severe, life-threatening disease for which there are no effective curative therapies. A diverse group of agents such as prostacyclins, endothelin antagonists, phosphodiesterase inhibitors, calcium channel blockers, diuretics, inotropic agents, and anticoagulants are used to treat PH; however, none of these agents have a marked effect upon survival. Among the new agents that promise treatment of PH are rho-kinase inhibitors and soluble guanylate cyclase stimulators. Although these new classes of agents have beneficial effects in experimental animal models and clinical studies, they are not selective in their actions on the pulmonary vascular bed. This manuscript reviews the actions of rho-kinase inhibitors and soluble guanylate cyclase stimulators on the pulmonary vascular bed. It is our hypothesis that these new agents may be more effective than current therapies in the treatment of PH. Moreover, new methods in the delivery of these agents to the lung need to be developed so that their main effects will be exerted in the pulmonary vascular bed and their systemic effects can be minimized or avoided.
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Abstract
OBJECTIVES HIV-related pulmonary arterial hypertension (PAH) is a rare entity but is associated with significant morbidity and mortality. The literature describing the outcomes of therapy for this disease is limited to case series and cohort studies. The objective of this study was to systematically review and synthesize the literature on HIV-related PAH. METHODS MEDLINE, EMBASE, PapersFirst, the Cochrane collaboration and the Cochrane Register of controlled trials were searched with pre-defined search terms. Randomized controlled trials, observational cohort studies, case-control studies and case reports were considered for inclusion in the qualitative analysis. RESULTS A total of 180 case reports of PAH in HIV-infected patients were identified. Twenty-six were excluded and thus 154 case reports were included in the qualitative analysis. Thirteen cohort, one case series and two case-control studies were also identified and included in the review. The average baseline CD4 count at the time of diagnosis of PAH was 352 ± 304 cells/μL. The average time from diagnosis of HIV infection to diagnosis of PAH was 4.3 ± 4.0 years. Predominant chest X-ray findings included cardiomegaly (80%) and pulmonary arterial enlargement (75%). Highly active antiretroviral therapy, bosentan, and prostaglandin therapy have all been reported to be beneficial in improving haemodynamic and functional status in HIV-related PAH. CONCLUSION HIV-related PAH is a rare entity with clinical, laboratory, imaging and pathological manifestations similar to those of idiopathic PAH. The evidence for various treatments is limited to cohort, case series and case-control studies. Randomized controlled trials are needed to properly assess the utility of these therapies in the treatment of HIV-related PAH.
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Affiliation(s)
- S Janda
- Division of Respirology, Vancouver General Hospital, University of British Columbia, Vancouver, Canada.
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Miró O, Pedrol E, Robert J, Flores L, Cardellach F. Cerebral paradoxical embolism in a patient infected by human immunodeficiency virus; TO THE EDITOR. Eur J Neurol 2011; 3:278-9. [DOI: 10.1111/j.1468-1331.1996.tb00437.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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