First degree AV block laboratory findings
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Sara Zand, M.D.[2] Ahmed Elsaiey, MBBCH [3]
Overview
Overview
There are no specific laboratory findings associated with First-degree AV block. However, in suspicion of underlying causes of atrioventricular block, laboratory testing about metabolic disorder, infectious disease, rheumatology disorder is reasonable.
Laboratory findings
Laboratory findings
Laboratory tests in patients with bradycardia or conduction disorder based on the underlying cause may include:[1]
- Thyroid function test in suspicion of hypothyroidism
- Lyme titer in acute Lyme carditis in a young patient who develops atrioventricular block in an endemic area
- Potassium level, PH in patients with renal insufficiency
- Blood digoxin level in patients suspected digoxin overdose
References
References
- ↑ Kusumoto, Fred M.; Schoenfeld, Mark H.; Barrett, Coletta; Edgerton, James R.; Ellenbogen, Kenneth A.; Gold, Michael R.; Goldschlager, Nora F.; Hamilton, Robert M.; Joglar, José A.; Kim, Robert J.; Lee, Richard; Marine, Joseph E.; McLeod, Christopher J.; Oken, Keith R.; Patton, Kristen K.; Pellegrini, Cara N.; Selzman, Kimberly A.; Thompson, Annemarie; Varosy, Paul D. (2019). “2018 ACC/AHA/HRS Guideline on the Evaluation and Management of Patients With Bradycardia and Cardiac Conduction Delay: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society”. Circulation. 140 (8). doi:10.1161/CIR.0000000000000628. ISSN 0009-7322.
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