title: Two observations regarding pervenous atrial pacing from the coronary sinus.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000628:therapy; D016275:Atrial Function; D006328:Cardiac Catheterization; D003331:Coronary Vessels / Q000502:physiology*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008875:Middle Aged; D010138:Pacemaker, Artificial