The coronary artery spasm is an intensive vasoconstriction that causes a vessel’s occlusion. Spastic atrioventricular-block is secondary, most of the time, to an impairment of the right coronary artery. It is a disease more common among Asiatic; its positive diagnosis is based on coronarography with a provocative test of the coronary spasm and a telemetry monitoring. The medical treatment consists of calcium channel blockers and the nitrated by-products. Cardiac pacing is required in case of failure of the drug treatment. We report the case of a 44-year-old woman, admitted for a complete atrio-ventricular block secondary to a spasm of the right coronary artery, which required, in addition to medical treatment, the establishment of a Pace maker.