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Altered coronary endothelial function in young smokers detected by magnetic resonance assessment of myocardial blood flow during the cold pressor test

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Abstract

Endothelial dysfunction is a key element in early atherogenesis. The purposes of this study were to evaluate the feasibility of magnetic resonance (MR) assessment of altered myocardial blood flow (MBF) in response to the cold pressor test (CPT) and to determine if coronary endothelial dysfunction in young smokers can be detected with this noninvasive approach. Fourteen healthy non-smokers (31 ± 6 years) and 12 smokers (34 ± 8 years) were studied. Breath-hold phase-contrast cine MR imaging (PC-MRI) of the coronary sinus (CS) were obtained at rest and during the CPT. MBF was measured as CS flow divided by left ventricle mass and the rate pressure product. In non-smokers, MBF was 0.88 ± 0.19 ml/min/g at rest and significantly increased to 1.13 ± 0.26 ml/min/g during the CPT (P = 0.0001). In smokers, MBF was 0.94 ± 0.26 ml/min/g at rest and 0.96 ± 0.30 ml/min/g during the CPT (P = 0.73). ΔMBF (MBF during the CPT–MBF at rest) was significantly reduced in smokers compared with non-smokers (0.02 ± 0.20 vs. 0.26 ± 0.18 ml/min/g, P = 0.005). The intra-class correlation coefficient between measurements by two observers was 0.90 for ΔMBF. A significant reduction in MBF response to CPT was demonstrated in young smokers with PC-MRI at 1.5 T. This noninvasive method has great potential for assessment of coronary endothelial function.

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Acknowledgments

The authors would like to thank the Advanced School for Core Investigators program organized by the Asian Society of Cardiovascular Imaging for providing valuable suggestions and comments on our research.

Conflict of interest

The authors report no conflicts of interest.

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Authors and Affiliations

  1. Department of Radiology, Matsusaka Central Hospital, 102 Kobou, Kawai, Matsusaka, Mie, 515-8566, Japan

    Yasutaka Ichikawa & Tadanori Hirano

  2. Department of Radiology, Mie University Hospital, 2-174 Edobashi, Tsu, Mie, 514-8507, Japan

    Kakuya Kitagawa, Shingo Kato & Hajime Sakuma

  3. Department of Cardiology, Mie University Hospital, 2-174 Edobashi, Tsu, Mie, 514-8507, Japan

    Kaoru Dohi & Masaaki Ito

Authors
  1. Yasutaka Ichikawa
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  2. Kakuya Kitagawa
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  3. Shingo Kato
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  4. Kaoru Dohi
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  5. Tadanori Hirano
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  7. Hajime Sakuma
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Correspondence to Yasutaka Ichikawa.

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Ichikawa, Y., Kitagawa, K., Kato, S. et al. Altered coronary endothelial function in young smokers detected by magnetic resonance assessment of myocardial blood flow during the cold pressor test. Int J Cardiovasc Imaging 30 (Suppl 1), 73–80 (2014). https://doi.org/10.1007/s10554-014-0387-y

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  • DOI: https://doi.org/10.1007/s10554-014-0387-y

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