[Melatonin production in hypertonic patients during magnetic storms]

Area of Science:

• Environmental Medicine
• Cardiovascular Physiology
• Endocrinology

Background:

• Essential hypertension (EH) affects a significant portion of the adult population.
• The influence of natural geomagnetic fields on human physiology, particularly in disease states, requires further elucidation.
• Melatonin plays a crucial role in circadian rhythm regulation and has potential cardiovascular implications.

Purpose of the Study:

• To investigate the impact of Earth's natural magnetic field on arterial pressure (AP) and melatonin production in patients with stage II essential hypertension.
• To compare the physiological responses of hypertensive patients and healthy individuals to geomagnetic variations.

Main Methods:

• A study involving 52 men with stage II EH and 11 healthy male controls.
• Monitoring of 24-hour, daytime, and nighttime systolic and diastolic arterial pressures.
• Radioimmunoassay measurement of urinary melatonin levels and assessment of geomagnetic activity using the K-index.

Main Results:

• Arterial pressure increased in hypertensive patients with rising geomagnetic activity, while remaining stable in healthy subjects.
• Magnetic storms significantly reduced nighttime and daytime melatonin production in EH patients.
• Healthy individuals maintained high nighttime melatonin production irrespective of geomagnetic conditions.

Conclusions:

• Patients with stage II essential hypertension exhibit a maladaptive physiological response to magnetic storms, characterized by increased arterial pressure and suppressed melatonin production.
• These findings suggest a potential link between geomagnetic activity and cardiovascular dysregulation in hypertensive individuals.