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Ischemic and nonischemic patterns of diastolic abnormalities during isometric handgrip exercise
1Diagnostic and Therapeutic Center of Athens Hygeia, Greece.
Cardiology
|January 1, 1995
Summary
The handgrip-apexcardiographic test (HAT) effectively differentiates diastolic abnormalities in coronary artery disease (CAD) patients from those with hypertrophic cardiomyopathy (HCM). This stress test identifies distinct patterns, aiding in diagnosing cardiac conditions.
Area of Science:
- Cardiology
- Diagnostic Imaging
- Physiology
Background:
- Distinguishing diastolic dysfunction in coronary artery disease (CAD) from hypertrophic cardiomyopathy (HCM) is clinically significant.
- Existing diagnostic methods may not fully capture exercise-induced diastolic abnormalities.
Purpose of the Study:
- To establish the clinical value of the handgrip-apexcardiographic test (HAT) for differentiating exercise-induced diastolic abnormalities.
- To identify distinct patterns of diastolic response to isometric stress in CAD and HCM patients.
Main Methods:
- A handgrip-apexcardiographic test (HAT) was administered to 305 healthy volunteers, 39 CAD patients, and 17 HCM patients.
- Defined 'ischemic diastolic response' (compliance/relaxation changes) and 'nonischemic diastolic response' based on apex-cardiogram indices during handgrip.
- Assessed handgrip-induced changes in diastolic indices.
Main Results:
- 72% of CAD patients exhibited an 'ischemic diastolic response'.
- 94% of HCM patients demonstrated a 'nonischemic diastolic response'.
- Distinct patterns of diastolic abnormalities were observed between CAD and HCM groups.
Conclusions:
- The HAT reliably differentiates between CAD and HCM based on diastolic response patterns to isometric stress.
- This simple stress test shows potential utility in separating CAD patients from those with nonischemic myocardial diseases.
- HAT provides valuable insights into diastolic function during isometric exertion.