Pulseless ventricular tachycardia laboratory findings
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Aisha Adigun, B.Sc., M.D.[2]
Overview
There aren't any specific findings associated with pulseless ventricular tachycardia. However, investigations should be conducted to find the underlying etiology of the arrhythmia.
Laboratory Findings
- There aren't any specific diagnostic laboratory findings associated with pulseless ventricular tachycardia.
- To find the underlying etiology of the arrhythmic event, the following investigations should be conducted;
- Serial cardiac enzymes;[1] these can help assess myocardial ischemia or infarction. They include;
- Troponin I and Troponin T
- Creatinine-kinase MB
- Serum electrolytes;[2][3] measuring electrolyte levels are important as imbalances in certain electrolytes predispose patients to torsade the pointes, a common cause of pulseless ventricular tachycardia. Important electrolytes to measure include;[1]
- Calcium
- Potassium
- Phosphate
- Magnesium
- A toxicology screen should be obtained to measure levels of therapeutic and illicit drugs (cocaine) as they can result in ventricular tachycardia.
References
- ↑ 1.0 1.1 "Ventricular Tachycardia: Practice Essentials, Background, Pathophysiology".
- ↑ Tchou P, Young P, Mahmud R, Denker S, Jazayeri M, Akhtar M (January 1988). "Useful clinical criteria for the diagnosis of ventricular tachycardia". Am. J. Med. 84 (1): 53–6. doi:10.1016/0002-9343(88)90008-3. PMID 3337132.
- ↑ Lown B, Temte JV, Arter WJ (June 1973). "Cardiac arrhythmias. 6. Ventricular tachyarrhythmias. Clinical aspects". Circulation. 47 (6): 1364–81. doi:10.1161/01.cir.47.6.1364. PMID 4709549.