Electrocardiogram (ECG) (cont.)
IN THIS ARTICLE
Basic Anatomy of the Heart
The right side of the heart collects blood from the body and pumps it to the lungs while the left side of the heart receives blood from the lungs and pumps it to the body.
Blood flows through the body in the following way:
Like any muscle, the heart requires oxygen and nutrients to function. Oxygen and nutrients are supplied by arteries that originate from the aorta. These vessels branch out to supply all the regions of the heart with oxygen rich blood.
Electrically, the heart can be divided into upper and lower chambers. An electrical impulse is generated in the upper chambers of the heart that causes the atria to squeeze and push blood into the ventricles. There is a short delay to allow the ventricles to fill. The ventricles then contract to pump blood to the body and the lungs.
Conducting system of the heart: SA means sinoatrial node. AV means atrioventricular node. RB and LB mean right and left bundle, respectively, and are the nerves that spread the electric impulse from the AV node into the ventricles.
The heart has its own automatic pacemaker called the sinaoatrial, or SA node, located in the right atrium. The SA node acts independently of the brain to generate electricity for the heart to beat.
Medically Reviewed by a Doctor on 2/17/2016
Must Read Articles Related to Electrocardiogram (ECG)
Patient Comments & Reviews
The eMedicineHealth doctors ask about Electrocardiogram (ECG, EKG):
Electrocardiogram (ECG) - Experience
Please describe your experience with an electrocardiogram (ECG).
Electrocardiogram (ECG, EKG) - Patient Experience
Tell us your experience receiving an electrocardiogram. What condition did it help diagnose?