Could Saliva Tests Help Detect Heart Attacks?
Researchers are investigating if salivary proteins can supplement blood tests to identify heart attacks.
Updated on Oct. 31, 2026 in Heart Disease
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Researchers are investigating whether saliva samples can act as a non-invasive tool to detect acute myocardial infarction. The study compared biomarkers in blood and saliva among 60 heart attack patients and 30 healthy individuals.
Why it matters
Developing a reliable, non-invasive method for cardiac assessment could simplify the diagnostic process for patients experiencing chest pain. This research explores if saliva testing might eventually support standard blood-based heart attack screenings.
This exploratory cross-validation analysis measured cardiac proteins in 60 patients and 30 healthy controls, finding strong correlations between blood and saliva biomarkers. The panel currently does not outperform standard blood-based diagnostic tests.
The details
Researchers collected paired blood and saliva samples to analyze levels of proteins including hs-cTnI, Apelin, Elabela, Endoglin, and Irisin. The team found that Endoglin levels were higher and Irisin levels were lower in the saliva of heart attack patients compared to healthy participants. However, the study confirms that using these salivary biomarkers did not provide better diagnostic performance than the current standard of measuring high-sensitivity cardiac troponin I (hs-cTnI) in the blood.
Timeline
The study findings were published on October 31, 2026.
Health Landscape
Standard clinical care currently relies on high-sensitivity cardiac troponin I (hs-cTnI) blood tests for the rapid confirmation of heart attacks. This research contributes to an evolving search for non-invasive, saliva-based diagnostic markers to complement existing blood-based care.
This research is preliminary and does not change how doctors currently screen for heart attacks in the emergency room. If you or someone you know experiences symptoms of a heart attack, seek immediate medical attention rather than waiting for diagnostic advancements.
The takeaway
While salivary testing for heart attacks remains in the exploratory phase, this study highlights the potential for non-invasive protein monitoring. Continue to prioritize standard medical protocols if you face cardiac concerns and discuss new testing innovations with your physician.
Further reading
Learn more about the latest diagnostic approaches in our Heart Disease section.
More information
View the complete scientific research study for detailed methodology.
Source note: This article includes information reported by Nature.
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