The Basics

A helpful guide to how your heart's electrical system works, complete with a diagram.

Learn how the heart works.

The heart is a muscle and needs its own supply of blood. Heart disease cuts down on the amount of blood the heart muscle gets. This can cause chest pain and even a heart attack. Here's what you need to know.

The pericardium is the thin, sac-like tissue that surrounds the heart. Inflammation of this tissue is called pericarditis. The condition may be mild and last only a few days. Or it may be more severe and lead to serious complications.

Nonstop flow of blood from the heart to the body and back to the heart again is called circulation. Blood vessels are hollow muscular tubes that carry blood throughout your body, much like pipes circulate water in your home.

Coronary artery disease can affect arteries throughout your body. Learn what's at risk.

A heart murmur is an extra noise heard during a heartbeat. The noise is caused when blood does not flow smoothly through the heart.

Watch this video to learn what an Automated External Defibrillator or AED is, how it works, and when it should be used to help save a life.

Watch this to know what an external defibrillator is and how it is used as a life-saving medical device.

CPR is a life-saving skill that can be performed with the power of your hands.

CPR starts with chest compressions. It is followed by rescue breathing. These are done in cycles.

Refresh your skills in CPR for children ages 1 to 8. Here are the steps to know, including how to use an automated external defibrillator.

Watch this to learn what Septal Myectomy means.

As a caregiver, you have a higher risk for health and emotional problems. That's because caregivers are less likely to attend to their own health by eating a healthy diet, getting physical activity and treating physical and emotional problems. It may feel like your first responsibility is to your loved one, but it's really to yourself. Learn to organize your duties as a caregiver. Find the time to take care of your own health. It will help you do a better job for your loved one. © AHA

As a caregiver, you have to communicate with many people: your loved one, family, friends, co-workers, healthcare providers and insurance companies. Effective communication is key to your success. © AHA

Caring for someone you love after a heart or stroke can be hard. The responsibilities and the emotional stress can cause you to forget to take care of yourself. These rights will help you remember that you have a right to health and happiness, even when you're caring for someone else. They'll help you realize that the emotions and pressures you may be feeling are normal. © AHA

Caregiver burnout is caused by long-term stress that can affect your physical, emotional and mental well-being. You become overwhelmed trying to meet the constant demands of your caregiving role. It can have a negative effect on how you care for yourself and your loved one. Your health and well-being benefit your loved one just as they benefit you. Learn the signs of caregiver burnout and seek help if you're having them. © AHA

As a caregiver to someone who has had a stroke, it is common to go through a number of emotions. In the beginning the main effort needs to be put into engaging the survivor in rehabilitation and making a big effort there. That push is one that will make a difference in the future. © AHA

Health reporter John Hammarley summarizes communication tips to help you prepare for your next visit to the doctor.