Anticoagulants are drugs that inhibits blood clots from forming in the veins and arteries of the body. There are a variety of uses for these drugs, which include the treatment or prevention of:

• Deep vein thrombosis (DVT)
• Blood clot in the lung (pulmonary embolism)
• Stroke
• Blood clots during AFib
• Heart attack

Common side effects of anticoagulants include:

• Flatulence (intestinal gas)
• Headache
• Lethargy
• Dizziness
• Fever
• Local injection site reactions
• Nausea
• Anemia
• Bruises caused by trauma (ecchymosis)
• Diarrhea

Drug and supplement interactions and pregnancy and breastfeeding safety should be reviewed prior to using anticoagulant drugs.

Atrial fibrillation (AF or AFib) is an abnormality in the heart rhythm which involves irregular and often rapid beating of the heart. Symptoms may include:

• Palpitations
• Dizziness
• Fainting
• Fatigue
• Shortness of breath
• Chest pain

Treatment may include medication or procedures like cardioversion or ablation to normalize the heart rate.

Atrial fibrillation or AFib is a type of hear rhythm abnormality. Early warning signs and symptoms of atrial fibrillation include:

• Chest pain
• Palpitations
• Shortness of breath
• Lightheadedness

Treatment for atrial fibrillation includes medical procedures, surgery, and medication.

Learn the causes, symptoms, and treatments of the common heart abnormality known as atrial fibrillation (A-fib).

Atrial fibrillation is the most common type of abnormal heart rhythm. Atrial fibrillation or AF can lead to serious heart complications like stroke. Risks associated with AFib are related to heart rhythm changes. Treating atrial fibrillation addresses these changes in heartbeat.

Atrial flutter is a problem with the atria of the heart. In atrial flutter the atria of the heart rapidly and repeatedly beat due to an anomaly in the electrical system of the heart. It is a type of arrhythmia and can be dangerous because complications can develop easily. Signs and symptoms of atrial flutter include:

• Near fainting
• Palpitations
• Mild shortness of breath
• Fatigue

While the exact cause of this condition is not clearly understood, it's most likely related to your health, what medical conditions you certainly have, poor diet, lack of exercise, and drinking too much alcohol.

This condition is diagnosed by physical examination, medical history, and a sawtooth ECG wave pattern.

Blood clots can occur in the venous and arterial vascular system. Blood clots can form in the heart, legs, arteries, veins, bladder, urinary tract and uterus. Risk factors for causes of blood clots include

• high blood pressure and cholesterol,
• diabetes,
• smoking, and
• family history.

Symptoms of a blood clot depend on the location of the clot. Some blood clots are a medical emergency. Blood clots are treated depending upon the cause of the clot. Blood clots can be prevented by lowering the risk factors for developing blood clots.

Deep vein thrombosis (DVT) is a blood clot in the deep veins, and can be caused by broken bones, trauma to a limb, immobility, medications, smoking, cancer, genetic predisposition, and cancer. Symptoms of a deep vein thrombosis in a leg are

• swelling,
• tenderness,
• redness,
• warmth, and
• pain.

Treatment for DVT include medications and surgery.

Take the Deep Vein Thrombosis and Pulmonary Embolism Quiz to learn causes, symptoms, and treatments for these two dangerous conditions.

Deep vein thrombosis (DVT) is a dangerous and sometimes fatal blood clot that occurs deep within the lower leg or thigh. Understand the symptoms, treatment and prevention of deep vein thrombosis (DVT).

The heart is composed of specialized cardiac muscle, and it is four-chambered, with a right atrium and ventricle, and an anatomically separate left atrium and ventricle. See a picture of Heart Detail and learn more about the health topic.

Learn about heart disease and heart attack symptoms and signs of a heart attack in men and women. Read about heart disease diagnostic tests, treatments, and prevention strategies.

Heart rhythm disorders vary from minor palpitations, premature atrial contractions (PACs), premature ventricular contractions (PVCs), sinus tachycardia, and sinus brachycardia, to abnormal heart rhythms such as tachycardia, ventricular fibrillation, ventricular flutter, atrial fibrillation, atrial flutter, paroxysmal supraventricular tachycardia (PSVT), Wolf-Parkinson-White syndrome, brachycardia, or heart blocks. Treatment is dependent upon the type of heart rhythm disorder.

A stroke is an interruption of the blood supply to part of the brain caused by either a blood clot (ischemic) or bleeding (hemorrhagic). Symptoms of a stroke may include

• weakness,
• numbness,
• double vision or vision loss,
• confusion,
• vertigo, and
• difficulty speaking or understanding speech.

A physical exam, imaging tests, neurological exam, and blood tests may be used to diagnose a stroke. Treatment may include administration of clot-busting drugs, supportive care, and in some instances, neurosurgery. The risk of stroke can be reduced by controlling high blood pressure, high cholesterol, diabetes, and stopping smoking.

When a portion of the brain loses blood supply, through a blood clot or embolus, a transient ischemic attack (TIA, mini-stroke) may occur. If the symptoms do not resolve, a stroke most likely has occurred. Symptoms of TIA include: confusion, weakness, lethargy, and loss of function to one side of the body. Risk factors for TIA include vascular disease, smoking, high blood pressure, high cholesterol, and diabetes. Treatment depends upon the severity of the TIA, and whether it resolves.