dificultad para respirar

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Asthma is a chronic disease of the respiratory system in which the airway occasionally constricts, becomes inflamed, and is lined with excessive amounts of mucus, often in response to one or more triggers. These acute episodes may be triggered by such things as exposure to an environmental stimulant (or allergen), cold air, exercise or exertion, or emotional stress. In children, the most common triggers are viral illnesses such as those that cause the common cold. This airway narrowing causes symptoms such as wheezing, shortness of breath, chest tightness, and coughing, which respond to bronchodilators. Between episodes, most patients feel fine. ... 

dificultad para respirar, sibilancias, tos

aumento de la sudoración, dificultad para respirar, dolor de estómago, palpitaciones

Anxiety is an unpleasant, emotional state of high energy that involves a complex combination of emotions that include fear, apprehension, and worry. It is often accompanied by physical sensations such as heart palpitations, nausea, chest pain, shortness of breath, or tension headache. ... 

dificultad para respirar, dolor en el pecho, mareos, respiración rápida

In medicine, hyperventilation (or overbreathing) is the state of breathing faster and/or deeper than necessary, thereby reducing the carbon dioxide concentration of the blood below normal. ... 

cambios de comportamiento, dificultad para respirar, irritabilidad, somnolencia

Sleep apnea or sleep apnoea is a sleep disorder characterized by pauses in breathing during sleep. These episodes, called apneas (literally, "without breath"), each last long enough so one or more breaths are missed, and occur repeatedly throughout sleep. There are two distinct forms of sleep apnea: Central and Obstructive. Breathing is interrupted by the lack of effort in Central Sleep Apnea, but in Obstructive Sleep Apnea breathing is interrupted by a physical block to airflow despite effort. In Mixed Sleep Apnea, both types of events occur. ... 

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debilidad, mareos, palidez, palpitaciones

Anemia (AmE) or anaemia (BrE), from the Greek meaning "without blood", refers to a deficiency of red blood cells (RBCs) and/or hemoglobin. This results in a reduced ability of blood to transfer oxygen to the tissues, causing hypoxia; since all human cells depend on oxygen for survival, varying degrees of anemia can have a wide range of clinical consequences. Hemoglobin (the oxygen-carrying protein in the red blood cells) has to be present to ensure adequate oxygenation of all body tissues and organs. 

dificultad para respirar, dolor en el pecho

Pleural effusion is excess fluid that accumulates in the pleural cavity, the fluid-filled space that surrounds the lungs. ... 

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Somatization disorder (also Briquet's disorder or, in antiquity, hysteria) is a psychiatric diagnosis applied to patients who chronicly and persistently complain of varied physical symptoms that have no identifiable physical origin. One common general etiological explanation is that internal psychological conflicts are unconsciously expressed as physical signs. ...