The revascularization of the atrio-ventricular node artery in a case of right coronary artery occlusion promptly discontinue the atrio-ventricular block.

As it is known, ischemia of the specialized myocardial excito-conducting tissue is one of the hypothesized mechanisms in atrio-ventricular (A-V) arrhythmias; unfortunately, in the current context of interventional cardiology, which is mainly focused on ablation and/or pacing, the ischemic hypothesis is scarcely taken into consideration. To discuss this hypothesis, which has a solid pathophysiological basis, we report here a case of ST elevation myocardial infarction (STEMI) with A-V block at onset, in which the revascularization of the A-V artery originating from an occluded right coronary artery (RCA) promptly restores a physiological A-V conduction.