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La mayoría de las veces, el cuerpo filtra los gérmenes del aire que respira. A veces, los gérmenes, como las bacterias, los virus o los hongos; ingresan a los pulmones y causan infecciones. Cuando estos gérmenes ingresan en los pulmones, el sistema inmunológico, que es la defensa natural del cuerpo contra los gérmenes, entra en acción. Las células inmunes atacan a los gérmenes y pueden causar una inflamación en los sacos de aire o alvéolos. La inflamación puede hacer que los sacos de aire se llenen de líquido y de pus y puede provocar los síntomas de la neumonía.

Pacemakers are used to treat certain types of arrhythmias, as well as heart failure, a condition that occurs when the heart cannot pump enough blood to the body. Not everyone with an arrhythmia needs a pacemaker.

Conditions that damage or overwork the heart muscle can cause the heart to weaken, including coronary heart disease, diabetes, high blood pressure, other heart conditions, and other factors.

DASH is a flexible and balanced eating plan that helps create a heart-healthy eating style for life.

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.

The exact cause of asthma is unknown, and the causes may vary from person to person. However, asthma is often the result of a strong response of the immune system to an allergen in the environment.

While Marfan syndrome has no cure, treatments can help delay or prevent complications, especially when started early. The type of treatment you receive will depend on what parts of your body are affected and the severity of your condition. You may have a team of doctors and specialists to coordinate your care.

Your risk for high blood cholesterol may be higher because of your age, family history and genetics, race or ethnicity, or sex.

Risk factors for overweight and obesity include having unhealthy lifestyle habits such as lack of physical activity, unhealthy eating behaviors, not getting enough sleep, having high amounts of stress; being a certain age; living in unhealthy environments, having a family history; being a certain race or ethnicity; or being a certain sex.

Heart failure is more common in people age 65 or older, blacks, people who are overweight, and people who have had a heart attack. Children who have congenital heart defects also can develop heart failure.