Overview
What is first-degree atrioventricular (AV) block?
What is the pathophysiology of first-degree atrioventricular (AV) block?
What causes first-degree atrioventricular (AV) block?
What causes first-degree atrioventricular (AV) block in well-trained athletes?
Which degenerative diseases of the conduction system cause first-degree atrioventricular (AV) block?
How does Lenègre disease cause first-degree atrioventricular (AV) block?
How does Lev disease cause first-degree atrioventricular (AV) block?
Which medications cause first-degree atrioventricular (AV) block?
Which infections cause first-degree atrioventricular (AV) block?
Which collagen vascular diseases cause first-degree atrioventricular (AV) block?
What are the iatrogenic causes of first-degree atrioventricular (AV) block?
What is the role of cardiac sarcoidosis in the etiology of first-degree atrioventricular (AV) block?
What is the US prevalence of first-degree atrioventricular (AV) block?
Which patient groups have the highest prevalence of first-degree atrioventricular (AV) block?
What is the global prevalence of first-degree atrioventricular (AV) block?
What is the prognosis of first-degree atrioventricular (AV) block?
What are the possible complications of first-degree atrioventricular (AV) block?
Presentation
Which clinical history findings are characteristic of first-degree atrioventricular (AV) block?
Which physical findings are characteristic of first-degree atrioventricular (AV) block?
DDX
What are the differential diagnoses for First-Degree Atrioventricular Block?
Workup
How is first-degree atrioventricular (AV) block diagnosed?
What is the role of electrocardiography in the workup of first-degree atrioventricular (AV) block?
What is the role of ultrasonography in the workup of first-degree atrioventricular (AV) block?
Which histologic findings are characteristic of first-degree atrioventricular (AV) block?
Treatment
How is first-degree atrioventricular (AV) block treated?
What is the role of a pacemaker in the treatment of first-degree atrioventricular (AV) block?
What is included in the long-term monitoring for first-degree atrioventricular (AV) block?
Medications
What is the role of medications in the treatment of first-degree atrioventricular (AV) block?
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First-Degree Atrioventricular Block. The PR interval is 0.24 seconds (240 ms) in a patient with asymptomatic first-degree atrioventricular block.
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First-Degree Atrioventricular Block. 12-Lead electrocardiogram from a patient with first-degree heart block.
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First-Degree Atrioventricular Block. 12-Lead electrocardiogram from a patient with first-degree heart block.