Most of the time, you’re probably blissfully unaware of your heart's ceaseless activity -- nearly 100,000 beats per day, or about 37 million beats per year and 3 billion in an average lifetime.
But not always. Maybe your pulse suddenly races for no apparent reason. Maybe your heart throbs. Maybe it flutters or seems to skip a beat. When it does, you wonder: Is this normal?
That can be a tricky question, especially if you don't know the facts about heart rate and rhythm. Here are five common myths...
Cardiovascular disease is the leading cause of death for both men and women in the U.S. It is important to learn about your heart to help prevent heart disease. And, if you have heart disease, you can live a healthier, more active life by learning about your disease and treatments and by becoming an active participant in your care.
Coronary Artery Disease
Coronary artery disease (CAD) is atherosclerosis, or hardening, of the arteries that provide vital oxygen and nutrients to the heart.
Abnormal Heart Rhythms
The heart is an amazing organ. It beats in a steady, even rhythm, about 60 to 100 times each minute (that's about 100,000 times each day!). But, sometimes your heart gets out of rhythm. An irregular or abnormal heartbeat is called an arrhythmia. An arrhythmia (also called a dysrhythmia) can involve a change in the rhythm, producing an uneven heartbeat, or a change in the rate, causing a very slow or very fast heartbeat.
The term "heart failure" can be frightening. It does not mean the heart has "failed" or stopped working. It means the heart does not pump as well as it should.
Heart failure is a major health problem in the U.S., affecting nearly 5 million Americans. About 550,000 people are diagnosed with heart failure each year. It is the leading cause of hospitalization in people older than 65.
Heart Valve Disease
Your heart valves lie at the exit of each of your four heart chambers and maintain one-way blood-flow through your heart.
Examples of heart valve disease include mitral valve prolapse, aortic stenosis, and mitral valve insufficiency.
Congenital Heart Disease
Congenital heart disease is a type of defect in one or more structures of the heart or blood vessels that occur before birth.
It affects about 8 out of every 1,000 children. Congenital heart defects may produce symptoms at birth, during childhood, and sometimes not until adulthood.
In most cases scientists don't know why they occur. Heredity and genetics may play a role as well as exposure to the fetus during pregnancy to certain viral infections, alcohol, or drugs.
Cardiomyopathy or Enlarged Heart
Cardiomyopathies, also called an enlarged heart, are diseases of the heart muscle itself. People with cardiomyopathies have hearts that are abnormally enlarged, thickened, and/or stiffened. As a result, the heart's ability to pump blood is weakened. Without treatment, cardiomyopathies worsen over time and often lead to heart failure and abnormal heart rhythms.