retrograde block

ret·ro·grade block

impaired conduction backward from the ventricles or AV node into the atria.

ret·ro·grade block

(ret'rō-grād blok)
Impaired conduction backward from the ventricles or atrioventricular node into the atria.
References in periodicals archive ?
When RV was stimulated with 600 ms, VA retrograde blocked. The patient's EPS showed evidence of preexcitation and AVB, exhibited an unusual pattern of high-grade (2:1-4:1) AVB when stimulated CS with S1 = 400 ms.