The L-shaped association between superoxide dismutase levels and blood pressure in older Chinese adults: community-based, cross-sectional study.

Background: As an antioxidant, serum superoxide dismutase (SOD) have been found to be associated with hypertension.

Methods: The data were derived from the Chinese Longitudinal Healthy Longevity Survey (CLHLS), a prospective cohort study in China. We explored the association between serum SOD and blood pressure (BP) using multivariable correction analysis in an older Chinese population.

Low deceleration capacity is associated with higher stroke risk in patients with paroxysmal atrial fibrillation.

Background: Deceleration capacity (DC) is a non-invasive marker for cardiac autonomic dysfunction; however, few studies have shown that the influence factors of cardiac autonomic dysfunction and the correlations between DC and stroke risk in paroxysmal atrial fibrillation (AF). We aimed to explore the influencing factors of abnormal DC and the relationships between DC and stroke risk in patients with paroxysmal AF.

Methods: The study included hospitalized paroxysmal AF patients with DC measurements derived from 24-h Holter electrocardiography recordings taken between August 2015 and June 2016.

[SCN5A mutation in patients with Brugada electrocardiographic pattern induced by fever].

Objective: To explore the relationship between SCN5A, SCN1b, SCN3b and GPD1L genotypes and the risk of malignant arrhythmia in patients with Brugada electrocardiographic pattern induced by fever.

Methods: The clinical data and peripheral blood of patients with Brugada electrocardiographic pattern induced by fever were collected. Patients with depolarization abnormality associated with hypertension, coronary heart disease, drugs and other factors were excluded.