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Causes of iron-deficiency anemia include blood loss, consuming too little iron, problems absorbing iron, and certain medical conditions.

COPD, or chronic obstructive pulmonary disease, is a progressive disease that makes it hard to breathe. In the United States, the term COPD includes two main conditions—emphysema and chronic bronchitis.

You may or may not notice atrial fibrillation. It often occurs with no signs or symptoms. If you do have symptoms, you may notice something that occurs only occasionally. Or, your symptoms may be frequent or serious.

Arrhythmia is caused by changes to heart tissue. It can also occur suddenly as a result of exertion or stress, imbalances in the blood, medicines, or problems with electrical signals in the heart. Typically, an arrhythmia is set off by a trigger, and the irregular heartbeat can continue if there is a problem in the heart. Sometimes the cause of an arrhythmia is unknown.

If you have known risk factors for developing an aortic aneurysm, your doctor may recommend screening. To screen for an aortic aneurysm, your doctor may recommend an imaging study to look at and measure the aorta. An aneurysm can develop and grow without any symptoms until it ruptures or dissects—events that are both life-threatening. If the aneurysm is found early, treatment or surgery may slow its growth and prevent rupture or dissection.

Al comienzo, es posible que la EPOC no cause síntomas o que estos sean leves. A medida que la enfermedad empeora, síntomas comunes incluyen tos (con o sin mucosidad), sensación de falta de aire, sibilancias o un silbido o chillido que se producen al respirar y presión en el pecho.

There are two types of aortic aneurysms: thoracic aortic aneurysms and abdominal aortic aneurysms.

Las causas de la anemia por deficiencia de hierro incluyen la pérdida de sangre, consumir muy poco hierro, problemas para absorber el hierro y ciertas afecciones.

La causa de la enfermedad isquémica del corazón depende del tipo que tenga. La enfermedad isquémica del corazón también puede tener más de una causa, incluida la acumulación de placa o cambios moleculares en los vasos sanguíneos.

Many factors play a role in preparing your body to fall asleep and wake up. Your body has several internal clocks, called circadian clocks. These typically follow a 24-hour repeating rhythm, called the circadian rhythm. This rhythm affects every cell, tissue, and organ in your body and how they work.