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Chronic Kidney Disease II: Clinical Manifestations01:24

Chronic Kidney Disease II: Clinical Manifestations

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Chronic Kidney Disease (CKD) progressively impairs multiple body systems due to the accumulation of uremic toxins, which disrupt cellular functions across various organs.Neurologic symptomsNeurologic symptoms often arise early in CKD, as uremic toxin buildup drives changes in cognitive and motor functions. Patients frequently experience fatigue, headache, confusion, difficulty concentrating, and, in severe cases, seizures. Peripheral neuropathy commonly manifests as burning sensations in the...
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Coronary Artery Disease III: Clinical Manifestations01:30

Coronary Artery Disease III: Clinical Manifestations

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Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
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Endocarditis II: Clinical Features of Infective Endocarditis01:25

Endocarditis II: Clinical Features of Infective Endocarditis

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Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...
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Heart Failure III: Clinical Manifestations01:26

Heart Failure III: Clinical Manifestations

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Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
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Gastroesophageal Reflux Disease II: Clinical Features and Management01:29

Gastroesophageal Reflux Disease II: Clinical Features and Management

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Gastroesophageal reflux disease, or GERD, is a persistent medical condition that affects many individuals worldwide. Its clinical manifestations can vary greatly, making diagnosis and management challenging for healthcare professionals. The following is a comprehensive overview of the clinical manifestations, assessment, and management strategies for GERD.
Clinical Manifestations
GERD presents itself in a multitude of ways, with symptoms varying from person to person. The hallmark symptoms are...
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Hypertension III: Clinical Manifestations and Diagnostic Studies01:30

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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...
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Updated: Jan 7, 2026

A Metadata Extraction Approach for Clinical Case Reports to Enable Advanced Understanding of Biomedical Concepts
07:50

A Metadata Extraction Approach for Clinical Case Reports to Enable Advanced Understanding of Biomedical Concepts

Published on: September 20, 2018

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Manifestaciones Clínicas

Christopher A Phillips1, Cory A Alcon1, Sam N Lockhart2,3

  • 1High Point University, High Point, NC, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
PubMed
Resumen
Este resumen es generado por máquina.

La función cognitiva y la educación predicen el éxito en las compras de comestibles en adultos jóvenes y mayores. Niveles más altos de amiloide beta en adultos mayores se asociaron con un peor rendimiento en esta tarea compleja.

Palabras clave:
envejecimiento cognitivocompras de comestiblesamiloide betareserva cognitivaneuroimagen

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Área de la Ciencia:

  • Neurociencia; Envejecimiento Cognitivo; Biomarcadores

Sus antecedentes:

  • Comprender cómo los biomarcadores de la enfermedad de Alzheimer (EA), como el amiloide beta (Aβ) cerebral, y la reserva cognitiva influyen en el rendimiento de tareas complejas es crucial para la intervención temprana. Este estudio investiga el poder predictivo de la demografía, los factores sociales, las capacidades cognitivas y la deposición de Aβ en el rendimiento de las compras de comestibles en adultos jóvenes (YA) y mayores (OA).

Objetivo del estudio:

  • Determinar si los factores demográficos, sociales, cognitivos y de deposición de Aβ predicen el rendimiento en las compras de comestibles en adultos jóvenes y mayores. Explorar las diferencias en estas relaciones predictivas entre los grupos de edad.

Principales métodos:

  • Cincuenta y cuatro adultos mayores (OA) y 28 adultos jóvenes (YA) sin deterioro cognitivo completaron cuatro ensayos de compras de comestibles utilizando seguimiento ocular. Las métricas de rendimiento incluyeron fijaciones en notas de compras y tiempo dedicado a fijar elementos/estanterías correctos. Los predictores incluyeron datos demográficos (educación, edad), factores sociales (tamaño del hogar), pruebas cognitivas (MoCA, Codificación, SSI, ICI) y escáneres PET de Aβ (solo OA).

Principales resultados:

  • En adultos jóvenes (YA), puntuaciones cognitivas más bajas (MoCA, ICI) predijeron más fijaciones en notas de compras, mientras que una menor educación predijo más tiempo en estanterías/marcas correctas. En adultos mayores (OA), la mayor edad, el Aβ más alto y una mejor velocidad de procesamiento (Codificación) predijeron más fijaciones en notas de compras. Mejores puntuaciones cognitivas (Codificación, MoCA) predijeron una búsqueda visual más eficiente (menos tiempo en áreas incorrectas) en OA, particularmente con Aβ más bajo.

Conclusiones:

  • Las capacidades cognitivas y la educación son predictores clave del rendimiento en las compras de comestibles en todos los grupos de edad. Los niveles más altos de Aβ cerebral se asocian con un escaneo visual menos eficiente durante las compras de comestibles en adultos mayores. Los hallazgos resaltan el papel de la cognición y el Aβ en el rendimiento de tareas complejas y el envejecimiento.