Can a Simple Blood Index Predict the Risk of Death After Stroke Treated with Thrombectomy?

Every year, thousands of people suffer a severe ischemic stroke caused by the obstruction of a large blood vessel in the brain. For these patients, mechanical thrombectomy—a procedure that removes the clot blocking circulation—has become a standard treatment. However, despite this intervention, nearly one in five patients dies within three months after the procedure. Identifying those at highest risk of fatal complications remains a major challenge to tailor their follow-up and improve their chances of survival.

A recent study focused on a biological marker little known to the general public: the triglyceride-glucose index. This indicator, calculated from blood sugar and fat levels, reflects insulin resistance, a mechanism where cells respond less effectively to this hormone that regulates blood glucose. Previous research had already shown its usefulness in assessing the risk of metabolic or cardiovascular diseases. But its role in the prognosis of patients who have undergone thrombectomy had not yet been clearly established.

Analysis of data from more than 700 people treated for severe ischemic stroke reveals that those with a high triglyceride-glucose index have an increased risk of short-term death. Specifically, patients with the highest values are nearly twice as likely to die during hospitalization and in the following three months, even after accounting for other factors such as age, stroke severity, or the presence of diabetes. This relationship is even more pronounced in non-diabetic individuals, suggesting that diabetes itself, often better monitored and treated, may mask the impact of this index.

The explanation may lie in the biological mechanisms linked to insulin resistance. This condition promotes inflammation, oxidative stress, and coagulation disorders—all phenomena that worsen brain damage after the blocked vessel is reopened. Additionally, high blood sugar levels can weaken the barrier protecting the brain and increase the risk of hemorrhage, a feared complication after this type of intervention.

These findings highlight the importance of systematically measuring this index in patients admitted for severe stroke. Early detection of elevated values could help identify individuals requiring enhanced monitoring or additional treatments to limit brain damage. In the long term, strategies aimed at reducing this index before or after the procedure could help lower mortality rates.

The study also confirms that the effect of this marker varies depending on the patient’s sex and metabolic status. Men appear more vulnerable to its consequences, likely due to hormonal differences and fat distribution in the body. These observations pave the way for personalized approaches, where management would be tailored not only to the severity of the stroke but also to each individual’s metabolic profile.

While these conclusions require further research to be confirmed, they already provide a concrete avenue for improving patient outcomes. Incorporating this simple and inexpensive index into the initial assessment could help medical teams better anticipate risks and act accordingly.

Legal Attributions

Study Citation

DOI: https://doi.org/10.1186/s12902-026-02206-0

Title: Triglyceride-glucose index as a potential evaluation tool for all-cause mortality in ischemic stroke patients undergoing endovascular therapy: a multicenter cohort study

Journal: BMC Endocrine Disorders

Publisher: Springer Science and Business Media LLC

Authors: Yanli Sun; Xiaojun Zhu; Jun Han; Wei Deng