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High blood pressure is inversely related with the presence and extent of coronary collaterals

Abstract

Patients with hypertension have an increased case fatality during acute myocardial infarction (MI). Coronary collateral (CC) circulation has been proposed to reduce the risk of death during acute ischaemia. We determined whether and to which degree high blood pressure (BP) affects the presence and extent of CC circulation. A cross-sectional study in 237 patients (84% males), admitted for elective coronary angioplasty between January 1998 and July 2002, was conducted. Collaterals were graded with Rentrop's classification (grade 0–3). CC presence was defined as Rentrop-grade 1. BP was measured twice with an inflatable cuff manometer in seated position. Pulse pressure was calculated by systolic blood pressure (SBP)−diastolic blood pressure (DBP). Mean arterial pressure was calculated by DBP+1/3 × (SBP−DBP). Systolic hypertension was defined by a reading 140 mmHg. We used logistic regression with adjustment for putative confounders. SBP (odds ratio (OR) 0.86 per 10 mmHg; 95% confidence interval (CI) 0.73–1.00), DBP (OR 0.67 per 10 mmHg; 95% CI 0.49–0.93), mean arterial pressure (OR 0.73 per 10 mmHg; 95% CI 0.56–0.94), systolic hypertension (OR 0.49; 95% CI 0.26–0.94), and antihypertensive treatment (OR 0.53; 95% CI 0.27–1.02), each were inversely associated with the presence of CCs. Also, among patients with CCs, there was a graded, significant inverse relation between levels of SBP, levels of pulse pressure, and collateral extent. There is an inverse relationship between BP and the presence and extent of CC circulation in patients with ischaemic heart disease.

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Acknowledgements

These data were presented previously in part as a poster, entitled ‘High blood pressure is inversely related with presence and extent of coronary collaterals’, at the 14th European Meeting on Hypertension of the European Society of Hypertension 2004 (Paris, France). We gratefully acknowledge Koos (J) Plomp, Cardiologist, Department of Cardiology, Heart Lung Center Utrecht, UMC Utrecht, Utrecht, The Netherlands, for scoring the 100 coronary angiograms to assess interobserver variability of the collateral grading. We thank Michael Edlinger for his accurate handling of the SMART-data. We thank Prof Harry AJ Struijker Boudier, PhD, for critical revision of the manuscript. We thank Christine AE Broeders for her excellent secretarial assistance. The work presented in this paper is part of a program grant from the Netherlands Organisation for Health Research and Development (ZonMw, project number 904-65-095). This funding source had no involvement in the writing of this paper or its submission. MCV is supported by the Netherlands Organisation for Scientific Research (NWO, Grant number 016-036-041).

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Correspondence to D E Grobbee.

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Appendix

Appendix

The SMART Study Group consists of A Algra, MD, PhD, Y van der Graaf, MD, PhD, DE Grobbee, MD, PhD, GEHM Rutten, MD, PhD, Julius Center for Health Sciences and Primary Care, JD Banga, MD, PhD, FLJ Visseren, MD, PhD, Department of Internal Medicine, BC Eikelboom, MD, PhD, FL Moll, MD, PhD, Department of Vascular Surgery, LJ Kappelle, MD, PhD, Department of Neurology, HA Koomans, MD, PhD, Department of Nephrology, WPThM Mali, MD, PhD, Department of Radiology, PAFM Doevendans, MD, PhD, and PPTh de Jaegere, MD, PhD, Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands.

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Koerselman, J., de Jaegere, P., Verhaar, M. et al. High blood pressure is inversely related with the presence and extent of coronary collaterals. J Hum Hypertens 19, 809–817 (2005). https://doi.org/10.1038/sj.jhh.1001917

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