[Evaluation of ST-segment analysis in long-term ECG]

Area of Science:

• Cardiology
• Medical Technology
• Diagnostic Imaging

Background:

• Accurate ST-segment analysis is crucial for diagnosing coronary heart disease (CHD).
• Conventional electrocardiography (ECG) during exercise stress testing is a standard diagnostic tool.
• Evaluating new technologies for improved accuracy and reliability is essential.

Purpose of the Study:

• To compare the accuracy of ST-segment analysis between the Marquette-Laser-Holter system and conventional ECG during ergometry.
• To assess the correlation of ST-segment measurements from both systems in patients with confirmed CHD.

Main Methods:

• Simultaneous recording of conventional chest leads and long-term ECGs using the Marquette-Laser-Holter system during standardized exercise.
• Analysis of ST-segments in lead V5 (conventional ECG) and Holter CM5 (Holter system).
• Comparison of ST-segment data between the two methods in 26 patients with angiographically confirmed CHD.

Main Results:

• A strong correlation (r = 0.91) was found between ST-segment readings from the Marquette-Laser-Holter system and conventional ECG.
• The Marquette-Laser-Holter system demonstrated high accuracy in detecting abnormal repolarizations during ergometry.
• Both systems effectively captured ST-segment deviations indicative of myocardial ischemia.

Conclusions:

• The Marquette-Laser-Holter system is a reliable tool for ST-segment analysis during exercise stress tests.
• This technology offers comparable accuracy to conventional ECG for diagnosing CHD.
• The findings support the use of the Marquette-Laser-Holter system in clinical cardiology practice for exercise testing.