Ignite Creation Date:
2026-03-26 @ 3:21 PM
Ignite Modification Date:
2026-04-01 @ 10:36 PM
Study NCT ID:
NCT06450327
Status:
RECRUITING
Last Update Posted:
2024-08-29
First Post:
2024-06-04
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
Resistant Hypertension An Open, Complicated ("Cum Plicare") or Complex ("Cum Plexus") Syndrome?
Sponsor:
Organization:
Raw JSON
{'hasResults': False, 'derivedSection': {'miscInfoModule': {'versionHolder': '2026-03-25'}, 'conditionBrowseModule': {'meshes': [{'id': 'D006973', 'term': 'Hypertension'}], 'ancestors': [{'id': 'D014652', 'term': 'Vascular Diseases'}, {'id': 'D002318', 'term': 'Cardiovascular Diseases'}]}}, 'protocolSection': {'designModule': {'studyType': 'OBSERVATIONAL', 'designInfo': {'timePerspective': 'CROSS_SECTIONAL', 'observationalModel': 'OTHER'}, 'enrollmentInfo': {'type': 'ESTIMATED', 'count': 80}, 'patientRegistry': False}, 'statusModule': {'overallStatus': 'RECRUITING', 'startDateStruct': {'date': '2024-08-27', 'type': 'ACTUAL'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2024-08', 'completionDateStruct': {'date': '2026-12-30', 'type': 'ESTIMATED'}, 'lastUpdateSubmitDate': '2024-08-28', 'studyFirstSubmitDate': '2024-06-04', 'studyFirstSubmitQcDate': '2024-06-07', 'lastUpdatePostDateStruct': {'date': '2024-08-29', 'type': 'ACTUAL'}, 'studyFirstPostDateStruct': {'date': '2024-06-10', 'type': 'ACTUAL'}, 'primaryCompletionDateStruct': {'date': '2026-04-30', 'type': 'ESTIMATED'}}, 'outcomesModule': {'primaryOutcomes': [{'measure': 'Blood Pressure', 'timeFrame': '4 weeks', 'description': 'through MAPA using non-linear calculations from Chaos Theory'}, {'measure': 'Heart Rate', 'timeFrame': '4 weeks', 'description': 'through MAPA using non-linear calculations from Chaos Theory'}, {'measure': 'Level of TNF-α', 'timeFrame': '10 weeks', 'description': 'Analysis of inflammatory responses associated with blood pressure variability'}, {'measure': 'Level of IL1β, IL-6', 'timeFrame': '10 weeks', 'description': 'Analysis of inflammatory responses associated with blood pressure variability'}]}, 'oversightModule': {'oversightHasDmc': True, 'isFdaRegulatedDrug': False, 'isFdaRegulatedDevice': False}, 'conditionsModule': {'keywords': ['autonomic nervous system', 'resistant hypertension', 'arterial hypertension', 'refractory hypertension', 'baroreceptors'], 'conditions': ['Hypertension', 'Resistant Hypertension']}, 'referencesModule': {'references': [{'pmid': '30354828', 'type': 'BACKGROUND', 'citation': 'Carey RM, Calhoun DA, Bakris GL, Brook RD, Daugherty SL, Dennison-Himmelfarb CR, Egan BM, Flack JM, Gidding SS, Judd E, Lackland DT, Laffer CL, Newton-Cheh C, Smith SM, Taler SJ, Textor SC, Turan TN, White WB; American Heart Association Professional/Public Education and Publications Committee of the Council on Hypertension; Council on Cardiovascular and Stroke Nursing; Council on Clinical Cardiology; Council on Genomic and Precision Medicine; Council on Peripheral Vascular Disease; Council on Quality of Care and Outcomes Research; and Stroke Council. Resistant Hypertension: Detection, Evaluation, and Management: A Scientific Statement From the American Heart Association. Hypertension. 2018 Nov;72(5):e53-e90. doi: 10.1161/HYP.0000000000000084.'}, {'pmid': '21502568', 'type': 'BACKGROUND', 'citation': 'Persell SD. Prevalence of resistant hypertension in the United States, 2003-2008. Hypertension. 2011 Jun;57(6):1076-80. doi: 10.1161/HYPERTENSIONAHA.111.170308. Epub 2011 Apr 18.'}, {'pmid': '25979412', 'type': 'BACKGROUND', 'citation': 'Modolo R, de Faria AP, Sabbatini AR, Barbaro NR, Ritter AM, Moreno H. Refractory and resistant hypertension: characteristics and differences observed in a specialized clinic. J Am Soc Hypertens. 2015 May;9(5):397-402. doi: 10.1016/j.jash.2015.03.005. Epub 2015 Mar 19.'}, {'pmid': '25139782', 'type': 'BACKGROUND', 'citation': 'Modolo R, de Faria AP, Almeida A, Moreno H. Resistant or refractory hypertension: are they different? 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Epub 2010 Oct 7.'}, {'pmid': '22029740', 'type': 'BACKGROUND', 'citation': 'Figueiredo VN, Yugar-Toledo JC, Martins LC, Martins LB, de Faria AP, de Haro Moraes C, Sierra C, Coca A, Moreno H. Vascular stiffness and endothelial dysfunction: Correlations at different levels of blood pressure. Blood Press. 2012 Feb;21(1):31-8. doi: 10.3109/08037051.2011.617045. Epub 2011 Oct 27.'}, {'pmid': '25186286', 'type': 'BACKGROUND', 'citation': 'de Faria AP, Modolo R, Fontana V, Moreno H. Adipokines: novel players in resistant hypertension. J Clin Hypertens (Greenwich). 2014 Oct;16(10):754-9. doi: 10.1111/jch.12399. Epub 2014 Sep 4.'}, {'pmid': '26504819', 'type': 'BACKGROUND', 'citation': 'Barbaro NR, de Araujo TM, Tanus-Santos JE, Anhe GF, Fontana V, Moreno H. Vascular Damage in Resistant Hypertension: TNF-Alpha Inhibition Effects on Endothelial Cells. Biomed Res Int. 2015;2015:631594. doi: 10.1155/2015/631594. Epub 2015 Oct 4.'}, {'pmid': '25061978', 'type': 'BACKGROUND', 'citation': 'Barbaro NR, Fontana V, Modolo R, De Faria AP, Sabbatini AR, Fonseca FH, Anhe GF, Moreno H. Increased arterial stiffness in resistant hypertension is associated with inflammatory biomarkers. Blood Press. 2015 Feb;24(1):7-13. doi: 10.3109/08037051.2014.940710. Epub 2014 Jul 25.'}, {'pmid': '27091893', 'type': 'BACKGROUND', 'citation': 'Dudenbostel T, Siddiqui M, Oparil S, Calhoun DA. Refractory Hypertension: A Novel Phenotype of Antihypertensive Treatment Failure. Hypertension. 2016 Jun;67(6):1085-92. doi: 10.1161/HYPERTENSIONAHA.116.06587. Epub 2016 Apr 18. No abstract available.'}, {'pmid': '30920924', 'type': 'BACKGROUND', 'citation': 'Acelajado MC, Hughes ZH, Oparil S, Calhoun DA. Treatment of Resistant and Refractory Hypertension. Circ Res. 2019 Mar 29;124(7):1061-1070. doi: 10.1161/CIRCRESAHA.118.312156.'}, {'pmid': '20921423', 'type': 'BACKGROUND', 'citation': 'Acelajado MC, Pimenta E, Calhoun DA. Salt and aldosterone: a concert of bad effects. Hypertension. 2010 Nov;56(5):804-5. doi: 10.1161/HYPERTENSIONAHA.110.160960. Epub 2010 Oct 4. No abstract available.'}, {'pmid': '27825280', 'type': 'BACKGROUND', 'citation': 'Ritter AM, de Faria AP, Barbaro N, Sabbatini AR, Correa NB, Brunelli V, Amorim R, Modolo R, Moreno H. Crosstalk between obesity and MMP-9 in cardiac remodelling -a cross-sectional study in apparent treatment-resistant hypertension. Blood Press. 2017 Apr;26(2):122-129. doi: 10.1080/08037051.2016.1249336. Epub 2016 Nov 8.'}, {'pmid': '22810172', 'type': 'BACKGROUND', 'citation': 'de Haro Moraes C, Figueiredo VN, de Faria AP, Barbaro NR, Sabbatini AR, Quinaglia T, Ferreira-Melo SE, Martins LC, Demacq C, Junior HM. High-circulating leptin levels are associated with increased blood pressure in uncontrolled resistant hypertension. J Hum Hypertens. 2013 Apr;27(4):225-30. doi: 10.1038/jhh.2012.29. Epub 2012 Jul 19.'}, {'pmid': '30843931', 'type': 'BACKGROUND', 'citation': 'Faria AP, Ritter AMV, Gasparetti CS, Correa NB, Brunelli V, Almeida A, Pires NF, Modolo R, Moreno Junior H. A Proposed Inflammatory Score of Circulating Cytokines/Adipokines Associated with Resistant Hypertension, but Dependent on Obesity Parameters. Arq Bras Cardiol. 2019 Apr;112(4):383-389. doi: 10.5935/abc.20190032. Epub 2019 Feb 28.'}, {'pmid': '26049084', 'type': 'BACKGROUND', 'citation': 'Ritter AM, Fontana V, Faria AP, Modolo R, Barbaro NR, Sabbatini AR, Peres H, Biagi C, Silva PS, Lopes PC, Tanus-Santos JE, Coelho EB, Moreno H. Association of Mineralocorticoid Receptor Polymorphism I180V With Left Ventricular Hypertrophy in Resistant Hypertension. Am J Hypertens. 2016 Feb;29(2):245-50. doi: 10.1093/ajh/hpv070. Epub 2015 Jun 6.'}, {'pmid': '21816315', 'type': 'BACKGROUND', 'citation': 'Bisognano JD, Bakris G, Nadim MK, Sanchez L, Kroon AA, Schafer J, de Leeuw PW, Sica DA. Baroreflex activation therapy lowers blood pressure in patients with resistant hypertension: results from the double-blind, randomized, placebo-controlled rheos pivotal trial. J Am Coll Cardiol. 2011 Aug 9;58(7):765-73. doi: 10.1016/j.jacc.2011.06.008.'}, {'pmid': '25987662', 'type': 'BACKGROUND', 'citation': 'Dudenbostel T, Acelajado MC, Pisoni R, Li P, Oparil S, Calhoun DA. Refractory Hypertension: Evidence of Heightened Sympathetic Activity as a Cause of Antihypertensive Treatment Failure. Hypertension. 2015 Jul;66(1):126-33. doi: 10.1161/HYPERTENSIONAHA.115.05449. Epub 2015 May 18.'}, {'pmid': '25079852', 'type': 'BACKGROUND', 'citation': 'Muxfeldt ES, de Souza F, Margallo VS, Salles GF. Cardiovascular and renal complications in patients with resistant hypertension. Curr Hypertens Rep. 2014 Sep;16(9):471. doi: 10.1007/s11906-014-0471-7.'}, {'pmid': '23595044', 'type': 'BACKGROUND', 'citation': 'Muiesan ML, Salvetti M, Rizzoni D, Paini A, Agabiti-Rosei C, Aggiusti C, Agabiti Rosei E. Resistant hypertension and target organ damage. Hypertens Res. 2013 Jun;36(6):485-91. doi: 10.1038/hr.2013.30. Epub 2013 Apr 18.'}, {'pmid': '25004914', 'type': 'BACKGROUND', 'citation': 'Metelka R. Heart rate variability--current diagnosis of the cardiac autonomic neuropathy. A review. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub. 2014 Sep;158(3):327-38. doi: 10.5507/bp.2014.025. Epub 2014 Jul 4.'}, {'pmid': '20435193', 'type': 'BACKGROUND', 'citation': 'Salles GF, Cardoso CR, Fiszman R, Muxfeldt ES. Prognostic impact of baseline and serial changes in electrocardiographic left ventricular hypertrophy in resistant hypertension. Am Heart J. 2010 May;159(5):833-40. doi: 10.1016/j.ahj.2010.02.012.'}, {'pmid': '24445393', 'type': 'BACKGROUND', 'citation': 'Salles GF, Ribeiro FM, Guimaraes GM, Muxfeldt ES, Cardoso CR. A reduced heart rate variability is independently associated with a blunted nocturnal blood pressure fall in patients with resistant hypertension. J Hypertens. 2014 Mar;32(3):644-51. doi: 10.1097/HJH.0000000000000068.'}, {'pmid': '21654850', 'type': 'BACKGROUND', 'citation': 'Dudenbostel T, Calhoun DA. Resistant hypertension, obstructive sleep apnoea and aldosterone. J Hum Hypertens. 2012 May;26(5):281-7. doi: 10.1038/jhh.2011.47. Epub 2011 Jun 9.'}, {'pmid': '24705438', 'type': 'BACKGROUND', 'citation': 'Muxfeldt ES, Margallo VS, Guimaraes GM, Salles GF. Prevalence and associated factors of obstructive sleep apnea in patients with resistant hypertension. Am J Hypertens. 2014 Aug;27(8):1069-78. doi: 10.1093/ajh/hpu023. Epub 2014 Apr 4.'}, {'pmid': '30788010', 'type': 'BACKGROUND', 'citation': 'Agashe S, Petak S. Cardiac Autonomic Neuropathy in Diabetes Mellitus. Methodist Debakey Cardiovasc J. 2018 Oct-Dec;14(4):251-256. doi: 10.14797/mdcj-14-4-251.'}, {'pmid': '19720958', 'type': 'BACKGROUND', 'citation': 'Grassi G. Assessment of sympathetic cardiovascular drive in human hypertension: achievements and perspectives. Hypertension. 2009 Oct;54(4):690-7. doi: 10.1161/HYPERTENSIONAHA.108.119883. Epub 2009 Aug 31.'}, {'pmid': '29915014', 'type': 'BACKGROUND', 'citation': "Grassi G, Pisano A, Bolignano D, Seravalle G, D'Arrigo G, Quarti-Trevano F, Mallamaci F, Zoccali C, Mancia G. Sympathetic Nerve Traffic Activation in Essential Hypertension and Its Correlates: Systematic Reviews and Meta-Analyses. Hypertension. 2018 Aug;72(2):483-491. doi: 10.1161/HYPERTENSIONAHA.118.11038. Epub 2018 Jun 18."}, {'pmid': '29713047', 'type': 'BACKGROUND', 'citation': 'Kasiakogias A, Tsioufis C, Dimitriadis K, Konstantinidis D, Koumelli A, Leontsinis I, Andrikou E, Vogiatzakis N, Marinaki S, Petras D, Fragoulis C, Konstantinou K, Papademetriou V, Tousoulis D. Cardiovascular morbidity of severe resistant hypertension among treated uncontrolled hypertensives: a 4-year follow-up study. J Hum Hypertens. 2018 Jul;32(7):487-493. doi: 10.1038/s41371-018-0065-y. Epub 2018 May 1.'}, {'pmid': '31008482', 'type': 'BACKGROUND', 'citation': 'Feng YN, Xiao H, Zhang YY. [Research advances of autonomic nervous system in the regulation of cardiac inflammation]. Sheng Li Xue Bao. 2019 Apr 25;71(2):225-234. Chinese.'}, {'pmid': '16915038', 'type': 'BACKGROUND', 'citation': "Palatini P, Dorigatti F, Zaetta V, Mormino P, Mazzer A, Bortolazzi A, D'Este D, Pegoraro F, Milani L, Mos L; HARVEST Study Group. Heart rate as a predictor of development of sustained hypertension in subjects screened for stage 1 hypertension: the HARVEST Study. J Hypertens. 2006 Sep;24(9):1873-80. doi: 10.1097/01.hjh.0000242413.96277.5b."}, {'pmid': '19573576', 'type': 'BACKGROUND', 'citation': 'Li YF, LaCroix C, Freeling J. Specific subtypes of nicotinic cholinergic receptors involved in sympathetic and parasympathetic cardiovascular responses. Neurosci Lett. 2009 Oct 2;462(1):20-3. doi: 10.1016/j.neulet.2009.06.081. Epub 2009 Jun 30.'}, {'pmid': '29214181', 'type': 'BACKGROUND', 'citation': 'Bissinger A. Cardiac Autonomic Neuropathy: Why Should Cardiologists Care about That? J Diabetes Res. 2017;2017:5374176. doi: 10.1155/2017/5374176. Epub 2017 Oct 29.'}, {'pmid': '23287453', 'type': 'BACKGROUND', 'citation': 'Karakas M, Koenig W. Sympathetic nervous system: a crucial player modulating residual cardiovascular risk. Circ Res. 2013 Jan 4;112(1):13-6. doi: 10.1161/CIRCRESAHA.112.281097. 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No abstract available.'}, {'pmid': '22713154', 'type': 'BACKGROUND', 'citation': 'Laurent S, Alivon M, Beaussier H, Boutouyrie P. Aortic stiffness as a tissue biomarker for predicting future cardiovascular events in asymptomatic hypertensive subjects. Ann Med. 2012 Jun;44 Suppl 1:S93-7. doi: 10.3109/07853890.2011.653398.'}, {'pmid': '24853828', 'type': 'BACKGROUND', 'citation': 'Pettersen KH, Bugenhagen SM, Nauman J, Beard DA, Omholt SW. Arterial stiffening provides sufficient explanation for primary hypertension. PLoS Comput Biol. 2014 May 22;10(5):e1003634. doi: 10.1371/journal.pcbi.1003634. eCollection 2014 May.'}, {'pmid': '20083680', 'type': 'BACKGROUND', 'citation': 'Mitchell GF, Hwang SJ, Vasan RS, Larson MG, Pencina MJ, Hamburg NM, Vita JA, Levy D, Benjamin EJ. Arterial stiffness and cardiovascular events: the Framingham Heart Study. Circulation. 2010 Feb 2;121(4):505-11. doi: 10.1161/CIRCULATIONAHA.109.886655. Epub 2010 Jan 18.'}, {'pmid': '33909761', 'type': 'BACKGROUND', 'citation': 'Barroso WKS, Rodrigues CIS, Bortolotto LA, Mota-Gomes MA, Brandao AA, Feitosa ADM, Machado CA, Poli-de-Figueiredo CE, Amodeo C, Mion Junior D, Barbosa ECD, Nobre F, Guimaraes ICB, Vilela-Martin JF, Yugar-Toledo JC, Magalhaes MEC, Neves MFT, Jardim PCBV, Miranda RD, Povoa RMDS, Fuchs SC, Alessi A, Lucena AJG, Avezum A, Sousa ALL, Pio-Abreu A, Sposito AC, Pierin AMG, Paiva AMG, Spinelli ACS, Nogueira ADR, Dinamarco N, Eibel B, Forjaz CLM, Zanini CRO, Souza CB, Souza DDSM, Nilson EAF, Costa EFA, Freitas EV, Duarte EDR, Muxfeldt ES, Lima Junior E, Campana EMG, Cesarino EJ, Marques F, Argenta F, Consolim-Colombo FM, Baptista FS, Almeida FA, Borelli FAO, Fuchs FD, Plavnik FL, Salles GF, Feitosa GS, Silva GVD, Guerra GM, Moreno Junior H, Finimundi HC, Back IC, Oliveira Filho JB, Gemelli JR, Mill JG, Ribeiro JM, Lotaif LAD, Costa LSD, Magalhaes LBNC, Drager LF, Martin LC, Scala LCN, Almeida MQ, Gowdak MMG, Klein MRST, Malachias MVB, Kuschnir MCC, Pinheiro ME, Borba MHE, Moreira Filho O, Passarelli Junior O, Coelho OR, Vitorino PVO, Ribeiro Junior RM, Esporcatte R, Franco R, Pedrosa R, Mulinari RA, Paula RB, Okawa RTP, Rosa RF, Amaral SLD, Ferreira-Filho SR, Kaiser SE, Jardim TSV, Guimaraes V, Koch VH, Oigman W, Nadruz W. Brazilian Guidelines of Hypertension - 2020. Arq Bras Cardiol. 2021 Mar;116(3):516-658. doi: 10.36660/abc.20201238. No abstract available. English, Portuguese.'}]}, 'descriptionModule': {'briefSummary': 'Resistant arterial hypertension (RAH) is a complex and multifactorial syndrome, with hyperactivity of the sympathetic nervous system (SNS) and reduction of vagal activity being considered some of the main causes of refractoriness to treatment. Seen from the outside, it resembles a complicated (see lat. "Cum plicate") or complex disease (see lat. "Cum plexus"), Chaotic with the participation of several open systems. For example, in recent years some relationships have been demonstrated between the autonomic nervous systems, synaptic mediators, hormones, inflammatory and immune responses. However, these findings have not been investigated together and systematically. In the present project, we intend to establish and compare, in an integrated way, the clinical alterations present in RAH (resistant and refractory), hemodynamic variables, autonomous activity (sympathetic and baroreflex) and interactions with the neuroimmune-endocrine systems. To this end, we will test the hypothesis that resistant patients have greater damage to the autonomic nervous system (ANS) associated with exacerbated systemic and hormonal inflammatory profile, including SNA mediators (noradrenaline and acetylcholinesterase). This is also intended to determine the behavior (deterministic or chaotic) of the systems evaluated (mentioned above) in volunteers with RAH. Sample and methods: The sample space (calculated) will consist of 72 individuals, being: - 18 refractory hypertensive (HRT); II- 18 resistant hypertensive patients (HRfT); III- 18 controlled hypertensive (1-2 drugs) (CAH); and IV- 18 healthy normotensive individuals. This is a prospective, double-blind study (patient and professional-technician), paired (1 X 4), in which the 72 volunteers will be evaluated by the methods set out below. We will also have the chance to observe whether resistant and refractory hypertension share the same pathophysiological bases and clinical manifestations ("deterministic-isolated or cardiovascular chaos") by analyzing the patterns of cardiovascular variability (MAPA and Holter) (SpaceLabs, USA; DynaMap, Brazil), inflammatory and hormonal mediators (ELISA) in the resistant hypertension - RHT and refratary hypertension - HfRT groups. Central pressure (CP) and arterial stiffness (pulse wave velocity, VOP) (Sphymocor, ATCor, USA) will also be assessed. Healthy normotensive (NT) and controlled hypertension (CAH) will be evaluated in an identical way to control the other groups. Perspectives: The findings will improve the clinical knowledge based on pathophysiology about Resistant Hypertension and, mainly, the bases of pharmacological treatment and with implantable devices (stimulation of baroreceptors and sympathetic denervation) used in this condition.', 'detailedDescription': "Cardiovascular Autonomic Modulation Procedures for spectral analysis of pulse interval (heart rate variability) and systolic blood pressure variability have been described in the literature41-44. Each heartbeat will be identified using a specialized algorithm implemented in Matlab MT software (MATLAB 6.0, Mathworks, USA ) and which automatically detects PAS and PAD waves. The pulse interval or R-R interval will be calculated as the difference between the start and end points of the cycle (t1-t0). The power spectral density of the PAS and R-R interval will be calculated using the Fast Fourier Transform and the Welch method over 16,384 points with a Hanning window and 50% overlap. The spectral bands evaluated for humans were defined according to literature references: very low frequency (MBF: 0.007-0.04Hz), low frequency (BF: 0.04-0.15Hz), high frequency (AF: 0. 15-0.4 Hz) and full power \\[130\\]. Baroreflex sensitivity will be inferred from the alpha index (HR BF ratio in ms2 / SBP BF ratio in mmHg).\n\nABPM - It will be performed with the CardioMAPA Monitor - Cardios - Brazil, with standardized measurements every 15 minutes during the waking period, and every 20 minutes during the sleeping period. The data will be considered valid when monitoring takes place for a minimum period of 21 hours with a minimum number of forty measurements during wakefulness and ten measurements during sleep.\n\nDetermination of Central Blood Pressure and Amplification Index (AIx) - The SphygmoCor CPV system (AtCor Medical, USA) is a sophisticated non-invasive diagnostic tool for clinical assessment of central blood pressure. This system derives central aortic pulse wave pressure (systolic, diastolic, and pulse) using pulse wave pressure recorded by the radial artery. Pulse wave analysis predicts parameters including PAC and indications of vascular stiffness. Measurements are made using a pressure transducer (tonometer) positioned in the required artery and then the pulse wave is recorded. Furthermore, this equipment provides information on arterial stiffness by analyzing the Augmentation Index \\[Amplification Index (AIx)\\], defined by the ratio between the pressure determined by the reflected wave and the ejection wave capable of providing information on arterial stiffness.\n\nAssessment of Clinical Parameters - BP measurements will be taken according to the recommendations recommended by the VIII Brazilian Guidelines on Arterial Hypertension using a digital sphygmomanometer (Omron HEM-711DLX). Pulse pressure (PP) will be calculated from the difference between SBP and DBP values. All individuals will undergo ambulatory BP monitoring (ABPM) for a period of 24 hours using the Spacelabs 90217 equipment (Spacelabs Inc, Redmon, WA, USA). Patients will be instructed to maintain and record normal daily activities. The averages of SBP, DBP and PP will be evaluated.\n\nAssessment of Biochemical and Inflammatory Parameters - Fasting blood samples will be collected and the following tests will be carried out: glucose, glycated hemoglobin A1C, total cholesterol and fractions, urea, creatinine, renin, aldosterone, cortisol, creatinine clearance and microalbuminuria. The biomarkers norepinephrine, dopamine, adrenaline, adrenocorticotropic hormones (ACTH) and cortisol, acetylcholinesterase, ultrasensitive C-reactive protein, interleukins 2, 8, 10 and 12 (IL-2, IL-8, IL-10 and IL-12) will be determined by ELISA according to the manufacturer's instructions."}, 'eligibilityModule': {'sex': 'ALL', 'stdAges': ['ADULT', 'OLDER_ADULT'], 'maximumAge': '85 Years', 'minimumAge': '18 Years', 'samplingMethod': 'PROBABILITY_SAMPLE', 'studyPopulation': 'Participants will be selected from the Resistant Hypertension Outpatient Clinic of the HC of UNICAMP and FAMERP - Faculty of Medicine of São José do Rio Preto. During the first six months of follow-up, ambulatory BP monitoring (ABPM) and optimization of pharmacological therapy will be carried out, including strict control of treatment adherence (pill count) and dietary guidelines. Furthermore, possible causes of secondary hypertension will be investigated and excluded.', 'healthyVolunteers': True, 'eligibilityCriteria': 'Inclusion Criteria:\n\n* men and women over 35 years of age diagnosed with resistant arterial hypertension (RH), in accordance with the latest international and national guidelines;\n* be able to understand, verbalize and answer questions;\n* agree to participate in the study and sign the Informed Consent Form;\n* after clearly understanding it;\n* be under regular follow-up at the UNICAMP Cardiovascular Pharmacology outpatient clinic for at least six months;\n* have proven adherence to non-pharmacological and pharmacological treatment;\n* women in the reproductive phase must be using a proven effective contraceptive method.\n\nExclusion Criteria:\n\n* clinical history or clinical symptoms of heart failure;\n* patients with dilated cardiomyopathies, valvular heart disease, pericardial disorders;\n* patients with cerebrovascular disease or peripheral arterial disease, nephropathies, liver diseases, smoking, autoimmune diseases and use of illicit substances;\n* any abnormal condition that may interfere with the results of the study or the health of the volunteer, as judged by the researcher;\n* women who are pregnant or intend to become pregnant;\n* current participation in another investigative study;\n* major depression or other relevant psychiatric disorders.'}, 'identificationModule': {'nctId': 'NCT06450327', 'briefTitle': 'Resistant Hypertension An Open, Complicated ("Cum Plicare") or Complex ("Cum Plexus") Syndrome?', 'organization': {'class': 'OTHER', 'fullName': 'University of Campinas, Brazil'}, 'officialTitle': 'Resistant Hypertension An Open, Complicated ("Cum Plicare") or Complex ("Cum Plexus")', 'orgStudyIdInfo': {'id': '57573922.0.0000.5415'}}, 'armsInterventionsModule': {'armGroups': [{'label': 'Normotensives - apparently healthy', 'description': 'Group of non-hypertensive participants', 'interventionNames': ['Other: This is a cross-sectional observational study']}, {'label': 'Controlled hypertension', 'description': 'Participants diagnosed with primary arterial hypertension and undergoing outpatient follow-up', 'interventionNames': ['Other: This is a cross-sectional observational study']}, {'label': 'Resistant Hypertension', 'description': 'Participants diagnosed with primary arterial hypertension using 3 or more antihypertensive medications, one of which is preferably a thiazide diuretic', 'interventionNames': ['Other: This is a cross-sectional observational study']}, {'label': 'Refractory Hypertension', 'description': 'Participants diagnosed with primary arterial hypertension using 5 or more antihypertensive medications.', 'interventionNames': ['Other: This is a cross-sectional observational study']}], 'interventions': [{'name': 'This is a cross-sectional observational study', 'type': 'OTHER', 'description': 'There will be no intervention in the study.', 'armGroupLabels': ['Controlled hypertension', 'Normotensives - apparently healthy', 'Refractory Hypertension', 'Resistant Hypertension']}]}, 'contactsLocationsModule': {'locations': [{'zip': '15505185', 'city': 'Votuporanga', 'state': 'São Paulo', 'status': 'RECRUITING', 'country': 'Brazil', 'contacts': [{'name': 'TATIANE DE AZEVEDO RUBIO', 'role': 'CONTACT', 'email': 'thatyazevedo@gmail.com', 'phone': '+55(17)991422510'}], 'facility': 'Tatiane de Azevedo Rubio', 'geoPoint': {'lat': -20.42278, 'lon': -49.97278}}], 'centralContacts': [{'name': 'TATIANE DE AZEVEDO RUBIO', 'role': 'CONTACT', 'email': 'thatyazevedo@gmail.com', 'phone': '+55(17)991422510'}]}, 'ipdSharingStatementModule': {'ipdSharing': 'NO', 'description': 'There will be no data sharing.'}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': 'University of Campinas, Brazil', 'class': 'OTHER'}, 'collaborators': [{'name': 'Fundação de Amparo à Pesquisa do Estado de São Paulo', 'class': 'OTHER_GOV'}], 'responsibleParty': {'type': 'PRINCIPAL_INVESTIGATOR', 'investigatorTitle': 'Principal Investigator', 'investigatorFullName': 'Tatiane De Azevedo Rubio', 'investigatorAffiliation': 'University of Campinas, Brazil'}}}}