From a static to a dynamic concept of risk: the circadian epidemiology of cardiovascular events

Area of Science:

• Cardiology
• Chronobiology
• Epidemiology

Background:

• Cardiovascular events exhibit significant temporal variations within 24-hour periods.
• These patterns suggest dynamic changes in underlying pathophysiological mechanisms and cardiovascular system physiology.
• Traditional epidemiological studies often assume constant disease risk over time, neglecting diurnal variations.

Purpose of the Study:

• To introduce the concept of 'chronorisk' to explain time-dependent patterns in cardiovascular events.
• To highlight the importance of temporal variability in pathophysiological mechanisms and their interactions.
• To propose a chronobiological approach for improved prognostic and therapeutic assessment in cardiovascular medicine.

Main Methods:

• Review of existing evidence on the temporal distribution of cardiovascular events.
• Conceptual development of the 'chronorisk' framework.
• Analysis of the interplay between pathophysiological mechanisms and cardiovascular susceptibility over time.

Main Results:

• Cardiovascular events are not randomly distributed but follow predictable temporal patterns, particularly within 24 hours.
• Temporal variations in pathophysiological processes and physiological status contribute to diurnal rhythms in disease susceptibility.
• The proposed 'chronorisk' concept integrates these temporal dynamics.

Conclusions:

• The concept of 'chronorisk' offers a novel perspective on understanding cardiovascular event occurrence.
• A chronobiological approach is crucial for a comprehensive assessment of cardiovascular disease.
• Further investigation and broader application of this approach in medicine are warranted.