🌐EnglishEnglishEspañolFrançaisItalianoPortuguêsالعربية中文日本語EntityQ685594· pop 11· linked from 185 articlessecond-degree atrioventricular blockdisease of the electrical conduction system of the heart. It is a conduction block between the atria and ventricles.ConnectionselectrocardiographyEntityartificial pacemakerEntityCategoriesCardiac arrhythmia