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Left ventricular diastolic and systolic function during isometric exercise: an echocardiographic study
Clinical Cardiology
|February 1, 1987
Summary
The isometric handgrip test improved left ventricular (LV) diastolic function in normal adults, showing M-mode echocardiography is effective for assessing cardiac responses to exercise. This method may enhance detection of subtle LV dysfunction.
Area of Science:
- Cardiology
- Physiology
- Diagnostic Imaging
Background:
- Assessing left ventricular (LV) function during exercise is crucial for understanding cardiac health.
- Standardized exercise protocols combined with echocardiography can reveal subtle changes in cardiac performance.
Purpose of the Study:
- To evaluate the impact of a standardized maximal isometric handgrip test on LV systolic and diastolic function in healthy adults.
- To determine the utility of M-mode echocardiography in conjunction with isometric exercise for cardiac assessment.
Main Methods:
- M-mode echocardiography was used to measure LV systolic and diastolic function in 20-63 year old normal subjects.
- Measurements were taken at rest and post-maximal isometric handgrip test.
- Blood pressure (BP) and heart rate (HR) were monitored throughout the test.
Main Results:
- Isometric handgrip exercise significantly increased BP and HR by approximately 25%.
- LV systolic function showed no significant changes.
- Significant improvements in LV diastolic function, including myocardial relaxation and filling rate, were observed.
Conclusions:
- The isometric handgrip test is a suitable and effective exercise modality for use with M-mode echocardiography.
- Combining isometric exercise with echocardiography can improve the sensitivity for detecting mild LV dysfunction.