electrical alternation of heart

e·lec·tri·cal al·ter·na·tion of heart

a disorder in which the ventricular or atrial complexes or both are regular in time but of alternating pattern; detected by electrocardiography. The P, PR segment, QRS, T, QRS-T, or P-QRST alternate singly or in combination.
Farlex Partner Medical Dictionary © Farlex 2012

e·lec·tri·cal al·ter·na·tion of heart

(ĕ-lek'tri-kăl awl-tĕr-nā'shŭn hahrt)
A disorder in which the ventricular or atrial complexes or both are regular in time but of alternating pattern; detected by electrocardiography.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
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