concordant alternation

con·cor·dant al·ter·na·tion

alternation in either the mechanical or electrical activity of the heart, occurring in both systemic and pulmonary circulations.

con·cor·dant al·ter·na·tion

(kŏn-kōr'dănt awl'tĕr-nā'shŭn)
Alternation in either the mechanical or electrical activity of the heart, occurring in both systemic and pulmonary circulations.