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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.

Sometimes VTE does not cause symptoms until serious complications occur. In other cases, deep vein thrombosis causes swelling or discomfort near the blood clot. Pulmonary embolism can cause chest pain and difficulty breathing. Pulmonary embolism can be a life-threatening condition.

Taking steps to ensure a healthy pregnancy might prevent your newborn from being born before his or her lungs have fully developed.

Taking steps to ensure a healthy pregnancy might prevent your newborn from being born before his or her lungs have fully developed. Your doctor may also give you injections of a corticosteroid medicine if he or she thinks you may give birth too early. This medicine can speed up development of the lungs, brain, and kidneys in your baby and surfactant production.

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.

Strokes are medical emergencies and treatment needs to begin immediately. Depending on the type of stroke, treatment may include medicines (such as tissue plasminogen activator (tPA) or anticoagulants/antiplatelets) and procedures (such as carotid endarterectomy or carotid artery angioplasty). Surgery—such as aneurysm clipping and coil embolization or arteriovenous malformation repair—may be needed to treat a hemorrhagic stroke. Making lifestyle changes can help treat and control risk factors for a stroke.

La enfermedad pulmonar obstructiva crónica, o EPOC, es una enfermedad progresiva que causa dificultad para respirar. En los Estados Unidos el término EPOC abarca dos enfermedades principales, el enfisema y la bronquitis crónica.

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.

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.

If you’ve already had sudden cardiac arrest, an implantable cardioverter defibrillator reduces the chances of dying from a second sudden cardiac arrest. If you have not yet had sudden cardiac arrest but have severe coronary heart disease, your doctor may prescribe a beta blocker or statin. Following a healthy lifestyle can help you lower your risk for sudden cardiac arrest, coronary heart disease, and other heart problems.