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Minutolo R, De Nicola L, Mallamaci F, Zoccali C. Thiazide diuretics are back in CKD: the case of chlorthalidone. Clin Kidney J 2022; 16:41-51. [PMID: 36726437 PMCID: PMC9871852 DOI: 10.1093/ckj/sfac198] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Indexed: 02/04/2023] Open
Abstract
Sodium and volume excess is the fundamental risk factor underlying hypertension in chronic kidney disease (CKD) patients, who represent the prototypical population characterized by salt-sensitive hypertension. Low salt diets and diuretics constitute the centrepiece for blood pressure control in CKD. In patients with CKD stage 4, loop diuretics are generally preferred to thiazides. Furthermore, thiazide diuretics have long been held as being of limited efficacy in this population. In this review, by systematically appraising published randomized trials of thiazides in CKD, we show that this class of drugs may be useful even among people with advanced CKD. Thiazides cause a negative sodium balance and reduce body fluids by 1-2 l within the first 2-4 weeks and these effects go along with improvement in hypertension control. The recent CLICK trial has documented the antihypertensive efficacy of chlorthalidone, a long-acting thiazide-like diuretic, in stage 4 CKD patients with poorly controlled hypertension. Overall, chlorthalidone use could be considered in patients with treatment-resistant hypertension when spironolactone cannot be administered or must be withdrawn due to side effects. Hyponatremia, hypokalaemia, volume depletion and acute kidney injury are side effects that demand a vigilant attitude by physicians prescribing these drugs. Well-powered randomized trials assessing hard outcomes are still necessary to more confidently recommend the use of these drugs in advanced CKD.
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Affiliation(s)
| | - Luca De Nicola
- Division of Nephrology, Department of Scienze Mediche e Chirurgiche Avanzate, University of Campania “Luigi Vanvitelli”Naples, Italy
| | - Francesca Mallamaci
- Unità Operativa di Nefrologia, Dialisi e Trapianto Renale, Grande Ospedale Metropolitano di Reggio Calabria, Rome, Italy,Institute of Clinical Physiology-Reggio Calabria Unit, National Research Council of Italy, Rome, Italy
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Bacan G, Ribeiro-Silva A, Oliveira VAS, Cardoso CRL, Salles GF. Refractory Hypertension: a Narrative Systematic Review with Emphasis on Prognosis. Curr Hypertens Rep 2022; 24:95-106. [PMID: 35107787 DOI: 10.1007/s11906-022-01165-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/09/2021] [Indexed: 12/31/2022]
Abstract
PURPOSE OF REVIEW To perform a narrative systematic review on refractory hypertension (RfHT) with particular emphasis on prognosis. RECENT FINDINGS There were 37 articles on RfHT, 13 non-systematic reviews, and 24 original studies. RfHT, a recently described extreme phenotype of anti-hypertensive treatment failure, shall be defined as uncontrolled out-of-office blood pressure (BP) levels despite the use of at least 5 anti-hypertensive drugs, including a long-acting diuretic and a mineraloreceptor antagonist. Its prevalence ranges from 0.5 to 4.3% of general treated hypertensives and between 3.6 and 51.4% of patients with resistant hypertension (RHT). RfHT is associated with younger age, African ancestry, obesity, hypertension-mediated organ damage and clinical cardiovascular diseases, and with some comorbidities, such as diabetes and obstructive sleep apnea. Its physiopathological mechanisms probably involve sympathetic overactivity and not volume overload. Patients with RfHT have a worse prognosis than non-refractory RHT individuals, with higher risks of adverse cardiovascular and renal outcomes and of mortality. RfHT represents a rare but true extreme phenotype of anti-hypertensive treatment failure distinct from RHT and with a significantly worse prognosis. Identifying such individuals is important to tailor specific interventions.
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Affiliation(s)
- Giovanna Bacan
- Department of Internal Medicine, School of Medicine, Universidade Federal do Rio de Janeiro, Rua Croton, 72, Jacarepagua, Rio de Janeiro - RJ, CEP: 22750-240, Brazil
| | - Angélica Ribeiro-Silva
- Department of Internal Medicine, School of Medicine, Universidade Federal do Rio de Janeiro, Rua Croton, 72, Jacarepagua, Rio de Janeiro - RJ, CEP: 22750-240, Brazil
| | - Vinicius A S Oliveira
- Department of Internal Medicine, School of Medicine, Universidade Federal do Rio de Janeiro, Rua Croton, 72, Jacarepagua, Rio de Janeiro - RJ, CEP: 22750-240, Brazil
| | - Claudia R L Cardoso
- Department of Internal Medicine, School of Medicine, Universidade Federal do Rio de Janeiro, Rua Croton, 72, Jacarepagua, Rio de Janeiro - RJ, CEP: 22750-240, Brazil
| | - Gil F Salles
- Department of Internal Medicine, School of Medicine, Universidade Federal do Rio de Janeiro, Rua Croton, 72, Jacarepagua, Rio de Janeiro - RJ, CEP: 22750-240, Brazil.
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