ST-segment changes in normal men during ambulatory electrocardiography

Area of Science:

• Cardiology
• Electrophysiology
• Preventive Medicine

Background:

• Ambulatory electrocardiographic monitoring is a key tool for assessing cardiac electrical activity.
• Understanding normal variations in electrocardiogram (ECG) parameters is crucial for accurate diagnosis.
• Previous studies have not extensively detailed ST-segment changes in young, healthy male populations.

Purpose of the Study:

• To investigate the occurrence and characteristics of ST-segment changes during 24-hour ambulatory ECG monitoring in healthy men.
• To compare the prevalence of ST-segment changes between younger (≤30 years) and older (>30 years) healthy male cohorts.

Main Methods:

• 24-hour ambulatory electrocardiographic monitoring was conducted on 46 healthy male subjects.
• Subjects were stratified into two age groups: 30 years and under (n=30) and over 30 years (n=16).
• An ECG analysis system with a digital filter was utilized to ensure accurate low-frequency response.

Main Results:

• ST-segment changes were frequently observed in the younger cohort (≤30 years).
• Specifically, 13 subjects aged 30 and under exhibited ST elevation, 3 showed both ST elevation and depression, and 3 had ST depression.
• In the older cohort (>30 years), 3 out of 16 subjects displayed ST elevation.

Conclusions:

• ST-segment variations during ambulatory electrocardiographic monitoring are a common finding in healthy men aged 30 and under.
• These findings suggest that transient ST-segment changes may represent a normal physiological response in younger healthy males.
• Further research is warranted to establish normative data and differentiate physiological changes from pathological conditions.