what does heterogeneous perfusion mean when it is dealing with radiology reports for the heart?

Question:

also if you can help....what does left ventricle ejection fraction 49%.
thanks for your help.

Answers:
Causes and Effects of Heterogeneous Perfusion in Tumors

Abstract:

A characteristic of solid tumors is their heterogeneous distribution of blood flow, with significant hypoxia and acidity in low-flow regions. We review effects of heterogeneous tumor perfusion are reviewed and propose a conceptual model for its cause. Hypoxic-acidic regions are resistant to chemo- and radiotherapy and may stimulate progression to a more metastatic phenotype. In normal tissues, hypoxia and acidity induce angiogenesis, which is expected to improve perfusion. However, aggressive tumors can have high local microvessel density simultaneously with significant regions of hypoxia and acidosis. A possible explanation for this apparent contradiction is that the mechanisms regulating growth and adaptation of vascular networks are impaired. According to a recent theory for structural adaptation of vascular networks, four interrelated adaptive responses can work as a self-regulating system to produce a mature and efficient blood distribution system in normal tissues. It is proposed that heterogeneous perfusion in tumors may result from perturbation of this system. Angiogenesis may increase perfusion heterogeneity in tumors by increasing the disparity between parallel low- and high-resistance flow pathways. This conceptual model provides a basis for future rational therapies. For example, it indicates that selective destruction of tumor vasculature may increase perfusion efficiency and improve therapeutic efficacy.
Keywords: angiogenesis; perfusion; acid-base balance; hypoxia; VEEF; HIF-1

Document Type: Review article

Affiliations: 1: Arizona Cancer Center, University of Arizona, Tucson, AZ 2: Department of Physiology, University of Arizona, Tucson, AZ

Heterogeneous perfusion means normal blood through the arteries in the heart. Thats good!
Ejection efraction means the function iof the heart. How strong the left ventricle is. 49% is considered low normal. 60%-70% is good.
Hope that helps!

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what does heterogeneous perfusion mean when it is dealing with radiology reports for the heart?

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