Unveiling the Hidden Stroke Threat in Patients With Atrial Fibrillation and Primary Hyperparathyroidism

Area of Science:

• Cardiology
• Endocrinology
• Neurology

Background:

• Current guidelines recommend considering stroke risk factors in atrial fibrillation (AF) patients.
• Nontraditional risk factors for stroke in AF, such as primary hyperparathyroidism (PHPT), are not well-explored.

Purpose of the Study:

• To investigate the association between PHPT and the risk of ischemic stroke in patients with AF.
• To determine if PHPT is an independent risk factor for ischemic stroke in AF patients.

Main Methods:

• Retrospective cohort study using the Nationwide Inpatient Sample Database.
• Propensity score matching was used to control for over 20 confounding variables, including CHA₂DS₂-VASc score components.
• Multivariate logistic regression analysis assessed the independent impact of PHPT on ischemic stroke risk.

Main Results:

• Patients with AF and PHPT had higher rates of ischemic stroke (6.0% vs 4.4%) and mortality (6.3% vs 4.9%) compared to those without PHPT.
• PHPT was associated with a 1.4-fold increased risk of ischemic stroke and a 1.32-fold increased risk of mortality, independent of CHA₂DS₂-VASc score.
• Subgroup analysis indicated higher mortality in men with high CHA₂DS₂-VASc scores and PHPT.

Conclusions:

• Primary hyperparathyroidism is significantly associated with an increased risk of ischemic stroke in patients with atrial fibrillation.
• PHPT should be considered in the thromboembolic risk assessment for AF patients, beyond traditional risk scores.
• Potential mechanisms include vascular changes, cardiac dysfunction, and coagulation alterations.