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The body’s muscles and nervous system help control your breathing. The lungs are like sponges; they cannot move on their own. Muscles in your chest and abdomen contract, or tighten, to create space in your lungs for air to flow in. The muscles then relax, causing the space in the chest to get smaller and squeeze the air back out. Your breathing usually does not require any thought, because it is controlled by the autonomic nervous system, also called the involuntary nervous system.

Breathing involves two phases: breathing in and breathing out. Your lungs deliver oxygen and remove carbon dioxide from your blood in a process called gas exchange. Gas exchange happens in the capillaries surrounding the alveoli, where the oxygen that is breathed in enters the circulatory system and carbon dioxide in the blood is released to the lungs and then breathed out. If you have problems breathing, gas exchange may be impaired, increasing the risk of serious health problems.

Treatments for peripheral artery disease include lifestyle changes, anti-clotting medicines, statins to control cholesterol, and medicines to treat high blood pressure. When peripheral artery disease is advanced or does not respond to lifestyle changes and medicines, your doctor may recommend surgery or procedures such as bypass grafting, angioplasty and stent placement, and atherectomy.

Your doctor will diagnose peripheral artery disease based on your medical and family histories, a physical exam, and results from one or more tests: ankle-brachial index, Doppler ultrasound, treadmill test, magnetic resonance angiogram (MRA), arteriogram, and blood tests.

Treatments for carotid artery disease may include heart-healthy lifestyle changes, medicines, and medical procedures such as carotid endarterectomy and carotid artery angioplasty and stenting.

Todas las personas mayores de 3 años deben visitar un profesional de la salud para medirse la presión arterial al menos una vez al año. El médico le tomara la presión arterial para ver si las lecturas de la presión arterial son constantemente altas. El médico le hablará sobre cambios en el estilo de vida para un corazón saludable para ayudarle a controlar la presión arterial o evitar la presión arterial alta.

Pneumonia can be very serious and even life-threatening. Vaccines can help prevent some types of pneumonia. Good hygiene (washing your hands often), quitting smoking, and keeping your immune system strong by getting regular physical activity and eating healthy are other ways to lower your risk of getting pneumonia.

Age, race, gender, certain medical conditions—high blood pressure, diabetes, brain aneurysms, and heart diseases—smoking, and family history can raise your risk for a stroke.

Ventricular fibrillation, a type of arrhythmia, causes most sudden cardiac arrests. Other problems with the heart's electrical system, including diseases or conditions that can cause the electrical problems—such as coronary heart disease, physical stress, certain inherited disorders, and structural changes in the heart—also can lead to sudden cardiac arrest.

La enfermedad coronaria es una enfermedad en la cual una sustancia cerosa llamada placa se acumula dentro de las arterias coronarias a través de muchos años. Estas arterias suministran sangre rica en oxígeno al músculo cardíaco.