loosely descriptive of the hearts electrical axis when this is directed at approximately +90°. As a cardiac electrical position, recognized in the electrocardiogram when the QRS complex in lead aVL resembles V1 while that in aVF resembles V6.
Farlex Partner Medical Dictionary © Farlex 2012
ver·ti·cal heart(vĕr'ti-kăl hahrt)
Descriptive of the heart's electrical axis when this is directed at approximately +90 degrees.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012