A recent study has found patients have an increased risk of Sudden Cardiac Arrest (SCA) when they have a lower serum Calcium Level. The risk of SCA was found to be over 2 times higher in patients with the lowest quartile of serum Calcium when compared with patients in the highest quartile of serum Calcium levels.
In the lowest quartile, participants had less the 8.95 mg/dl (Milligrams/deciliter) of serum Calcium. In the highest quartile group, levels over 9.55 mg/dl of serum Calcium were seen. Data for the study was taken from the Oregon Sudden Unexpected Death Study (Oregon SUDS). This study is the first of its kind to identify an association between low serum Calcium levels as measured prior to a SCA event and the elevated risk of this adverse event. This was deemed important since many of the individuals who experience a SCA are not considered as a high risk for this type of catastrophic event under the usual guidelines used to evaluate risk.
There were however some limitation seen in the study findings. Some of the participants with lower serum Calcium levels also had other issues which may have added to their risk factors of SCA. Additionally the study was designed to be an observational one and therefore a causal mechanism could not be concluded.
Researchers agreed that additional study was needed.
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