Paroxysmal AV block Laboratory Findings and Stimulation tests: Difference between revisions
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==Overview== | ==Overview== | ||
Adenosine Plasma levels, adenosine triphosphate stimulation tests and lab values related to potential reversible causes of AV block such as a thyroid profile, electrolyte values,etc are important laboratory investigations. | [[Adenosine]] [[Plasma]] levels, [[adenosine triphosphate]] [[stimulation]] tests and lab values related to potential reversible causes of [[AV block]] such as a [[thyroid]] profile, [[electrolyte]] values,etc are important laboratory investigations. | ||
=Laboratory Investigations and stimulation tests= | =Laboratory Investigations and stimulation tests= | ||
*'''Adenosine plasma levels (APL) and Adneosine Triphosphate (ATP)stimulation tests are tests of value in extrinsic idiopathic AV Block'''. | *'''[[Adenosine]] [[plasma]] levels (APL) and [[Adneosine Triphosphate]] (ATP)stimulation tests are tests of value in [[extrinsic idiopathic paroxysmal AV Block]]'''. | ||
**As previously discussed, '''APL levels are innately low in patients with EI AVB and therefore, on injection of ATP, AV blocks maybe reproduced'''. | **As previously discussed, '''APL levels are innately low in patients with EI AVB and therefore, on [[injection]] of ATP, [[AV blocks]] maybe reproduced'''. | ||
*Other lab investigations such as arterial blood gas analysis, hemoglobin, troponin or D- dimer may help with the diagnoses in appropriate clinical situations. {{cite web |url=https://www.escardio.org/Guidelines/Clinical-Practice-Guidelines/Syncope-Guidelines-on-Diagnosis-and-Management-of |title=ESC Guidelines on Syncope (Diagnosis and Management of) |format= |work= |accessdate=}} | *Other lab investigations such as [[arterial blood gas]] analysis, [[hemoglobin]], [[troponin]] or [[D- dimer]] may help with the diagnoses in appropriate clinical situations. {{cite web |url=https://www.escardio.org/Guidelines/Clinical-Practice-Guidelines/Syncope-Guidelines-on-Diagnosis-and-Management-of |title=ESC Guidelines on Syncope (Diagnosis and Management of) |format= |work= |accessdate=}} | ||
=2018 ACC/AHA/HRS Guideline on the Evaluation and Management of Patients With Bradycardia and Cardiac Conduction Delay: Recommendation for Laboratory Testing= | =2018 ACC/AHA/HRS Guideline on the Evaluation and Management of Patients With Bradycardia and Cardiac Conduction Delay: Recommendation for Laboratory Testing= | ||
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| bgcolor="LemonChiffon"|<nowiki>"</nowiki>'''1.''' In patients with bradycardia, laboratory tests (eg, thyroid function tests, Lyme titer, potassium, pH) based on clinical suspicion | | bgcolor="LemonChiffon"|<nowiki>"</nowiki>'''1.''' In patients with bradycardia, laboratory tests (eg, thyroid function tests, Lyme titer, potassium, pH) based on clinical suspicion | ||
for a potential underlying cause are reasonable ''([[ACC AHA Guidelines Classification Scheme#Level of Evidence|Level of Evidence: C-LD]]) | for a potential underlying cause are reasonable ''([[ACC AHA Guidelines Classification Scheme#Level of Evidence|Level of Evidence: C-LD]])'' <nowiki>"</nowiki> | ||
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==References== | ==References== | ||
<references /> | |||
Revision as of 13:00, 2 July 2020
Overview
Adenosine Plasma levels, adenosine triphosphate stimulation tests and lab values related to potential reversible causes of AV block such as a thyroid profile, electrolyte values,etc are important laboratory investigations.
Laboratory Investigations and stimulation tests
- Adenosine plasma levels (APL) and Adneosine Triphosphate (ATP)stimulation tests are tests of value in extrinsic idiopathic paroxysmal AV Block.
- Other lab investigations such as arterial blood gas analysis, hemoglobin, troponin or D- dimer may help with the diagnoses in appropriate clinical situations. "ESC Guidelines on Syncope (Diagnosis and Management of)".
2018 ACC/AHA/HRS Guideline on the Evaluation and Management of Patients With Bradycardia and Cardiac Conduction Delay: Recommendation for Laboratory Testing
| Recommendation for Laboratory Testing |
| "1. In patients with bradycardia, laboratory tests (eg, thyroid function tests, Lyme titer, potassium, pH) based on clinical suspicion
for a potential underlying cause are reasonable (Level of Evidence: C-LD) " |