Cold exposure and the cardiovascular system: from physiological adaptation to pathological risk

Area of Science:

• Cardiovascular Medicine
• Environmental Physiology
• Metabolic Adaptation

Background:

• Cold exposure is a known risk factor for cardiovascular events.
• The body's response to cold involves complex physiological adaptations.
• These adaptations can be both detrimental and protective for cardiovascular health.

Purpose of the Study:

• To critically analyze the paradoxical role of cold stress in cardiovascular medicine.
• To synthesize current evidence on the cardiovascular response to cold.
• To propose a model for seasonal cardiovascular disease regulation and explore cold-based therapies.

Main Methods:

• Review of existing literature on cold stress and cardiovascular disease.
• Synthesis of evidence from studies on coronary disease and heart failure.
• Analysis of molecular pathways involved in cold adaptation.

Main Results:

• Cold challenge triggers sympathetic activation, hemodynamic stress, and brown adipose tissue recruitment.
• Cardiac metabolic remodeling occurs in response to cold, with potentially pathological or protective outcomes.
• Evidence suggests molecular pathways influencing metabolic, inflammatory, and electrophysiological effects.

Conclusions:

• Cold stress exhibits a dual role in cardiovascular medicine, presenting both risks and adaptive mechanisms.
• Understanding these adaptive mechanisms, like brown adipose tissue activation, may offer therapeutic potential.
• A mechanistic model for seasonal cardiovascular disease regulation can be developed based on cold's effects.