[Method of diagnosing ischemic heart disease by using isometric loading].

Area of Science:

• Cardiology
• Diagnostic Imaging
• Exercise Physiology

Background:

• Coronary artery disease diagnosis often relies on exercise testing.
• Standard bicycle ergometry is effective but may have limitations.

Purpose of the Study:

• To compare the diagnostic capabilities of bicycle ergometry, manual dynamometry, and a combined approach in patients with coronary artery disease.
• To evaluate the effectiveness of increased venous return in enhancing diagnostic accuracy.

Main Methods:

• Twenty-five male patients (41-57 years) with angina of effort underwent bicycle ergometry, manual dynamometry, and a combined test with increased venous return.
• Electrocardiogram (ECG) changes (ST displacement) and cardiac rhythm disorders were analyzed.

Main Results:

• Bicycle ergometry showed 100% ST displacement; manual dynamometry showed 24%; the combined method showed 76%.
• Cardiac rhythm disorders were detected in 32% with static load tests and 88% with the combined method.
• The combined test demonstrated higher sensitivity for detecting coronary artery disease indicators.

Conclusions:

• Combining manual dynamometry with increased venous return is a more sensitive method for diagnosing coronary artery disease than either test alone.
• This combined approach, particularly for detecting cardiac rhythm disorders, offers improved diagnostic potential.
• The simplicity of the combined test suggests its suitability for outpatient settings.