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Coronary Flow Reserve and Small Artery Remodelling in Hypertensive Patients

Re-Analysis of Data and Review of the Literature

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Abstract

Objective: To evaluate the relationship between subcutaneous small arteries structure and coronary flow reserve in patients with essential hypertension.

Methods: Eighteen patients with mild to moderate essential hypertension and normal epicardial coronary arteries were included in the study and underwent a biopsy of the subcutaneous fat from the gluteal region. Subcutaneous small arteries were dissected and mounted on a micromyograph. The media thickness, the normalized internal diameter and the media: lumen ratio were then calculated. Measurement of coronary flow velocity in the left anterior descending artery before and during maximal pharmacological vasodilatation was performed by transesophageal Doppler echocardiography.

Results: Mean and peak coronary flow reserve (CFR) as well as minimum coronary resistance were significantly correlated to both media: lumen ratio and normalized internal diameter of subcutaneous small arteries. Those patients with a mean CFR (mCFR) of <2.69 (i.e. 1 SD below the mean of values in our normal reference subjects) had a greater media: lumen ratio and a smaller internal diameter compared with those with a mCFR of ≥2.69. Similarly, patients with a media: lumen ratio of ≥0.109 had a smaller mCFR compared with those with a media: lumen ratio of <0.109.

Conclusions: These results are in keeping with the hypothesis of a generalized remodelling of small arteries, that may also be responsible for a reduced coronary vasodilator capacity even in patients with mild to moderate essential hypertension.

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Acknowledgements

No sources of funding were used to assist in the preparation of this review. The authors have no conflicts of interest that are directly relevant to the content of this review.

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Correspondence to Damiano Rizzoni.

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Rizzoni, D., Palombo, C., Porteri, E. et al. Coronary Flow Reserve and Small Artery Remodelling in Hypertensive Patients. High Blood Press Cardiovasc Prev 15, 127–134 (2008). https://doi.org/10.2165/0151642-200815030-00006

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  • DOI: https://doi.org/10.2165/0151642-200815030-00006

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