Normal indicates normal sinus rhythm, the normal functioning of the heart's electrical system. Specifically, for Kardia(tm), Instant Analysis Normal indicates a regular sinus rhythm with a heart rate of 50 to 100 beats per minute.
The heart pumps blood to the lungs and to all the body's tissues by a sequence of highly organized contractions between two upper chambers (atria) and two lower chambers (ventricles). For the heart to function properly, the four chambers must beat in sync. Normal indicates that the electrical signals that control the heart are occurring normally, beginning at the top of the heart (from a region called the "sinus" node) and then traveling downwards to the ventricles.
The term "arrhythmia" refers to any change from the normal sequence of electrical impulses.
Heart disease and heart attack can occur in the presence of normal sinus rhythm. Contact a physician or emergency services if you have questions or are concerned about any symptoms.