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. 2009:2009:927385.
doi: 10.4061/2009/927385. Epub 2009 Dec 29.

Endothelial Function as a Possible Significant Determinant of Cardiac Function during Exercise in Patients with Structural Heart Disease

Bonpei Takase  1 , Takashi Akima, Akimi Uehata, Masayuki Ishihara, Akira Kurita
Affiliations

Endothelial Function as a Possible Significant Determinant of Cardiac Function during Exercise in Patients with Structural Heart Disease

Bonpei Takase et al. Cardiol Res Pract. 2009.

Abstract

This study was investigated the role that endothelial function and systemic vascular resistance (SVR) play in determining cardiac function reserve during exercise by a new ambulatory radionuclide monitoring system (VEST) in patients with heart disease. The study population consisted of 32 patients. The patients had cardiopulmonary stress testing using the treadmill Ramp protocol and the VEST. The anaerobic threshold (AT) was autodetermined using the V-slope method. The SVR was calculated by determining the mean blood pressure/cardiac output. Flow-mediated vasodilation (FMD) was measured in the brachial artery to evaluate endotheilial function. FMD and the percent change f'rom rest to AT in SVR correlated with those from rest to AT in ejection fraction and peak ejection ratio by VEST, respectively. Our findings suggest that FMD in the brachial artery and the SVR determined by VEST in patients with heart disease can possibly reflect cardiac function reserve during aerobic exercise.

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Figures

Figure 1
Figure 1
The correlation between the percent changes in systemic peripheral vascular resistance and cardiac response to exercise. EF: left ventricular ejection fraction; SVR: systemic peripheral vascular resistance; AT: anaerobic threshold; PER: peak ejection rate.
Figure 2
Figure 2
The correlation between flow-mediated vasodilation and cardiac response to exercise. FMD: flow-mediated vasodilation; EF: left ventricular ejection fraction; PER: peak ejection rate.
Figure 3
Figure 3
The correlation between flow-mediated vasodilation and cardiac response to exercise in the patients not on ACE-inhibitors. FMD: flow-mediated vasodilation; EF: left ventricular ejection fraction; PER: peak ejection rate.
Figure 4
Figure 4
The correlation between flow-mediated vasodilation and changes in systemic peripheral vascular resistance during exercise in the patients not on ACE-inhibitors. FMD: flow-mediated vasodilation; SVR: systemic peripheral vascular resistance.
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