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Cardiac function changes with switching from the supine to prone position: Analysis by quantitative semiconductor gated single-photon emission computed tomography

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Journal of Nuclear Cardiology Aims and scope

Abstract

Background

Prone positioning is required in certain operations such as spinal surgery. Changes in cardiac function in the prone position have been studied with various methodologies. Few studies have investigated changes in left ventricular diastolic function and rhythm in subjects turned prone.

Methods and Results

Cardiac function was evaluated in the supine and prone positions in 90 patients without atrial fibrillation who underwent 99mTc-tetrofosmin quantitative gated single-photon emission computed tomography. Three groups of 30 patients each were classified as “no history of myocardial ischemia or cardiomyopathy” (Group A), “history of myocardial infarction” (Group B), and “ischemic heart disease without myocardial infarction history” (Group C). Upon assuming the prone position, the cardiac index and any dyssynchrony worsened in all groups. Ejection fraction changes occurred only in Group B, and diastolic function changes occurred in Groups B and C, but not in Group A. The changes caused by prone positioning were more severe in the patients with poor cardiac function.

Conclusions

Prone positioning induces significant changes in systolic and diastolic function, as well as dyssynchrony. The negative effects of prone positioning are more severe in patients with poor baseline cardiac function.

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Acknowledgments

We thank Mr. Masami Hasegawa and Mr. Shigenori Uchida for their excellent technical assistance.

Disclosures

The authors have no conflicts of interest to declare.

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Correspondence to Masato Shimizu MD.

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Shimizu, M., Fujii, H., Yamawake, N. et al. Cardiac function changes with switching from the supine to prone position: Analysis by quantitative semiconductor gated single-photon emission computed tomography. J. Nucl. Cardiol. 22, 301–307 (2015). https://doi.org/10.1007/s12350-014-0058-3

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  • DOI: https://doi.org/10.1007/s12350-014-0058-3

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