Heart rate turbulence in patients with metabolic syndrome

Area of Science:

• Cardiology
• Autonomic Nervous System Function
• Metabolic Disorders

Background:

• Metabolic syndrome is a constellation of risk factors associated with cardiometabolic diseases.
• Previous research has linked metabolic syndrome to cardiovascular disease (CVD), but cardiac autonomic function has not been extensively studied.
• Heart rate turbulence (HRT) is a key indicator of cardiac autonomic function and its role in CVD development.

Purpose of the Study:

• To investigate the impact of metabolic syndrome on heart rate turbulence (HRT).
• To assess whether metabolic syndrome affects cardiac autonomic function, even without diagnosed heart disease.

Main Methods:

• A study involving 37 patients with metabolic syndrome and 37 healthy controls.
• Calculation of heart rate turbulence (HRT) indices, specifically turbulence onset (TO) and turbulence slope (TS), using 24-hour ambulatory electrocardiographic recordings.

Main Results:

• Abnormal heart rate turbulence (HRT) values (either TO or TS) were detected in 62% of individuals with metabolic syndrome.
• In contrast, only 27% of the control group exhibited abnormal HRT values.
• These findings indicate a significant difference in cardiac autonomic function between the two groups.

Conclusions:

• Cardiac autonomic function is demonstrably impaired in patients with metabolic syndrome, even in the absence of overt cardiac disease.
• The study highlights the potential role of autonomic dysfunction in the pathophysiology of metabolic syndrome.
• Further research is warranted to determine the prognostic significance and clinical implications of these impaired autonomic functions.