Atrioventricular Block - Cardiovascular Disorders - Merck Manuals Professional Edition
Second-Degree Heart Block: Symptoms, Causes, Treatment, Outlook
Heart Blocks, Anatomy and ECG Reading, Animation. - YouTube
Second-degree atrioventricular block - Wikipedia
What is Heart Block?
Osmosis from Elsevier on Twitter: "Atrioventricular block is a type of arrhythmia where the signal is delayed or blocked when moving from the atria to the ventricles. Learn more about Atrioventricular block