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description of the heart's electrical position; recognized in the electrocardiogram when the QRS in lead aVL resembles that in V6 and QRS in aVF resembles that in V1; also, loosely, when the electrical axis lies between -30° and +30°.
Farlex Partner Medical Dictionary © Farlex 2012
hor·i·zon·tal heart(hōr'i-zon'tăl hahrt)
Description of the heart's electrical position; recognized in the electrocardiogram when the electrical axis lies between -30 and +30 degrees.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012