Video Experimental Relacionado
Updated: Jul 4, 2026
06:08
A Novel Method: Super-selective Adrenal Venous Sampling
Published on: September 15, 2017
Prevalencia del hiperaldosteronismo primario en la hipertensión resistente: un estudio observacional retrospectivo
Stella Douma1, Konstantinos Petidis, Michael Doumas
1Second Propedeutic Department of Internal Medicine, Hippokration Hospital, Aristotle University of Thessaloniki, Greece.
Lancet (London, England)
|June 10, 2008
Resumen
El hiperaldosteronismo primario afecta al 11,3% de los pacientes con hipertensión resistente, una prevalencia más baja de lo sugerido anteriormente. Este estudio desafía la idea de una epidemia de esta condición en la población hipertensa general.
Área de la Ciencia:
- Endocrinología Endocrinología.
- Investigación de la Hipertensión Investigación de la Hipertensión
- La medicina clínica es la medicina clínica.
Sus antecedentes:
- Se debate la prevalencia del hiperaldosteronismo primario (síndrome de Conn) en la hipertensión, con estimaciones de más del 10%.
- Se considera que la hipertensión resistente tiene la mayor prevalencia de hiperaldosteronismo primario basado en estudios limitados.
- Este estudio tuvo como objetivo determinar la prevalencia real en una gran cohorte de hipertensión resistente.
Objetivo del estudio:
- Para evaluar con precisión la prevalencia del hiperaldosteronismo primario en pacientes con hipertensión resistente.
- Para comparar los hallazgos con estimaciones anteriores y evaluar el concepto de una epidemia.
Principales métodos:
- 1616 pacientes con hipertensión resistente fueron evaluados durante 20 años.
- El cribado inicial incluyó la relación de actividad de la aldosterona sérica y la renina plasmática.
- Los casos positivos se sometieron a pruebas de supresión de la sal y se confirmaron por la respuesta al tratamiento con espironolactona.
Principales resultados:
- El 11,3% (182/1616) de los pacientes fueron diagnosticados con hiperaldosteronismo primario.
- Esta prevalencia es menor que en algunos informes anteriores.
- La hipocalemia estaba presente en sólo el 45,6% de los pacientes diagnosticados.
Conclusiones:
- La prevalencia del hiperaldosteronismo primario en la hipertensión resistente es significativa, pero es menor de lo que a menudo se cita.
- La alta prevalencia en la población hipertensa general es probablemente sobreestimada.
- El concepto de una epidemia de hiperaldosteronismo primario no está respaldado por estos hallazgos.
Videos de Conceptos Relacionados
01:18Hypertension and Regulation of Blood Pressure
Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
01:30Hypertension III: Clinical Manifestations and Diagnostic Studies
Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
01:25Antihypertensive Drugs: Direct Renin Inhibitors
The renin-angiotensin-aldosterone system (RAAS) is an intricate physiological pathway involving numerous enzymes and hormones, including renin, angiotensin-converting enzyme (ACE), angiotensin I and II, and aldosterone. Imbalances within this system increase the production of angiotensin II and aldosterone. Increased angiotensin II levels promote vasoconstriction and blood pressure elevation. Concurrently, higher aldosterone levels stimulate sodium and water reabsorption in the kidneys,...
01:29Hypertension II: Pathophysiology
Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
01:28Antihypertensive Drugs: Potassium-Sparing Diuretics
Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...
01:33Hormonal Regulation
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.