Posibleng Mga Sanhi para sa Third Degree Atrioventricular Block Coxsackievirus Infection Coronary Atherosclerosis Malalang Myocardial Infarction Hemochromatosis Electrolyte Imbalance Pagka-overdose sa Opiate Atrial Septal Defect Sick Sinus Syndrome Lenegre Disease AV Block Mobitz I Lyme Disease Ankylosing Spondylitis Myotonic Dystrophy Hypereosinophilic Syndrome Lithium Pagkalantad sa Nerve Gas Adenosine
