Identify the major types of atrioventricular (AV) block, including first-degree AV block, second-degree AV block (Mobitz Type I and Mobitz Type II), and third-degree AV block, and recall their defining electrocardiographic characteristics.

Explain the underlying conduction disturbances associated with each type of AV block and distinguish how atrial and ventricular activity is affected in each condition.

Interpret electrocardiographic findings to differentiate first-degree AV block, Mobitz Type I AV block, Mobitz Type II AV block, and third-degree AV block based on PR interval behavior, QRS relationships, and AV synchrony.

Analyze clinical scenarios involving AV block to determine potential etiologies, including congenital heart disease, cardiomyopathy, myocarditis, rheumatic heart disease, surgical interventions, and medication-related causes.

Evaluate appropriate management strategies for patients with AV block by determining when treatment of the underlying cause is sufficient and when AV pacing may be indicated to restore atrioventricular synchrony.