Cardio IQ® Vitamin D, 25‑Hydroxy
Also known as: CardioIQ®, Vitamin D, 25-Hydroxy, LC/MS/MS, Cardio IQ®
Use
At low levels, vitamin D (25‑Hydroxy) is associated with increased risk of cardiovascular events and death due to heart failure, sudden cardiac death, and stroke. These cardiovascular effects are mediated via activation of the renin‑angiotensin‑aldosterone system and increased parathyroid hormone, which contribute to insulin resistance, hypertension, inflammation, and heightened cardiovascular risk ([questdiagnostics.com](https://www.questdiagnostics.com/healthcare-professionals/about-our-tests/cardiovascular/cvd-test-descriptions?utm_source=openai)).
Special Instructions
Not provided.
Limitations
Not provided.
Methodology
Mass Spectrometry
Biomarkers
Result Turnaround Time
2-4 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.3 mL
Container
Red Top (No Additive)
Collection Instructions
Fasting is preferred but not required. Gently invert 5X (Do not shake!). Let blood clot for 30 min at room temperature. Centrifuge for 10 min.
Patient Preparation
Fasting preferred, but not required.
Causes for Rejection
Gross hemolysis; grossly lipemic; heparinized or EDTA plasma; grossly icteric; specimens other than serum; improper labeling; samples older than stability limits; samples not stored properly
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 21 Days |
| Refrigerated | 21 Days |
| Frozen | 21 Days |