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Grade-response relationship between blood pressure and severity of coronary atherosclerosis in asymptomatic adults: assessment with coronary CT angiography

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Abstract

Hypertension is known to be a strong risk factor for coronary atherosclerosis. We aimed to investigate the prevalence, severity, and plaque characteristics of coronary atherosclerosis according to grade of blood pressure (BP) using coronary CT angiography (CCTA) in asymptomatic adults. We enrolled 8,238 asymptomatic subjects who underwent coronary artery calcium scoring (CACS) and CCTA for health screening purposes. Subjects were classified according to JNC 7 guidelines (normal, systolic BP/diastolic BP < 120/80; pre-hypertension [PH], 120–139/80–89; hypertension stage 1 [H1], 140–159/90–99; hypertension stage 2 [H2], >160/100). Isolated systolic hypertension (ISH; systolic BP > 140, diastolic BP < 80) was additionally categorized. With CCTA, the presence of plaques, severity of stenosis, and plaque types were assessed. Using multiple logistic regression analysis, the adjusted odds ratios (AORs) for plaque, obstructive coronary artery disease (CAD) (luminal stenosis ≥50 %), non-calcified plaque (NCP), and CACS > 100 were assessed according to BP grade. After adjustment for clinical risk factors, the risk of subclinical atherosclerosis, NCP, and CACS > 100 gradually increased from PH stage (all P values for trend <0.05), while the risk of obstructive CAD increased from the H1 stage (AORs of H1 and H2: 1.70 and 2.33, respectively). In the ISH group, the AOR of subclinical atherosclerosis (1.64) was higher than in the H1 group (1.55), while the AOR of obstructive CAD (2.58) was higher than in the H2 group (2.33). Therefore, our study strongly suggests that coronary atherosclerosis in asymptomatic adults shows a grade-response relationship according to hypertension grade.

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Authors and Affiliations

  1. Department of Radiology, Seoul National University Bundang Hospital, Gyeonggido, 436-707, Korea

    Tae Seong Im, Eun Ju Chun, Min Su Lee & Sang Il Choi

  2. Department of Imaging Techniques, Motol University Hospital, Prague, Czech Republic

    Theodor Adla

  3. Department of Radiology, Inje University Ilsan Paik Hospital, Gyeonggido, 411-706, Korea

    Jeong A. Kim

  4. Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Gyeonggido, 436-707, Korea

    Eun Ju Chun

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  1. Tae Seong Im
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  2. Eun Ju Chun
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Correspondence to Eun Ju Chun.

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Im, T.S., Chun, E.J., Lee, M.S. et al. Grade-response relationship between blood pressure and severity of coronary atherosclerosis in asymptomatic adults: assessment with coronary CT angiography. Int J Cardiovasc Imaging 30 (Suppl 2), 105–112 (2014). https://doi.org/10.1007/s10554-014-0522-9

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