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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References
Folkow B. Physiological aspects of primary hypertension. Physiol Rev 1982; 63: 347–504
Mulvany MJ, Aalkjaer C. Structure and function of small arteries. Physiol Rev 1990; 70: 921–71
Heagerty AM, Aalkjaaer C, Bund SJ. Small artery structure in hypertension: dual process of remodeling and growth. Hypertension 1993; 21: 391–7
Agabiti-Rosei E, Rizzoni D, Castellano M, et al. Media:lumen ratio in human small resistance arteries is related to forearm minimal vascular resistance. J Hypertens 1995; 13: 341–7
Aalkjaer C, Haegerty AM, Petersen KK, et al. Evidence for increased media thickness, increased neural amine uptake, and depressed excitation-contraction cou-pling in isolated resistance vessels from essential hypertensives. Circ Res 1987; 61(2): 181–6
Rizzoni D, Porteri E, Castellano M, et al. Vascular hypertrophy and remodeling in secondary hypertension. Hypertension 1996; 28: 785–90
Rizzoni D, Porteri E, Guelfi D, et al. Cellular hypertrophy in subcutaneous small arteries of patients with renovascular hypertension. Hypertension 2000; 35: 931–5
Lever AF. Slow pressor mechanisms in hypertension: a role for hyper-trophy of resistance vessels? J Hypertens 1986; 4: 515–24
Schiffrin EL. Reactivity of small blood vessels in hypertension: relationship with structural changes. Hypertension 1992; 19Suppl. II: II1–9
Folkow B, Grimby G, Thulesius O. Adaptive structural changes in the vascular wall in hypertension and their relation to the control of peripheral resistance. Acta Physiol Scand 1958; 44: 255–72
Conway J. A vascular abnormality in hypertension: a study of blood flow in the forearm. Circulation 1963; 27: 520–9
Pedrinelli R, Dell’Omo G, Gimelli A, et al. Myocardial and forearm blood flow reserve in mild-moderate essential hypertensive patients. J Hypertens 1997; 115: 667–73
Vogt M, Motz W, Strauer BE. Coronary hemodynamics in hypertensive heart disease. Eur Heart J 1992; 13Suppl. D: 44–9
Kaski JC. Myocardial ischemia in the hypertensive patient: the role of coronary microcirculation abnormalities. Eur Heart J 1993; 14Suppl. J: 32–7
Kozàkovà M, Palombo C, Pratali L, et al. Mechanisms of coronary flow reserve impairment in human hypertension: an integrated approach by transthoracic and transesophageal echocardiography. Hypertension 1997; 29: 551–9
Rizzoni D, Palombo C, Porteri E, et al. Relationship between coronary vasodilator capacity and small artery remodeling in hypertensive patients. J Hypertens 2003; 21: 615–21
European Society of Hypertension/European Society of Cardiology guidelines for the management of arterial hypertension. J Hypertens 2003 21: 1011–53
Kozàkovà M, Palombo C, Pratali L, et al. Assesssment of coronary reserve by transoesophageal Doppler echocardiography. Eur Heart J 1997; 18: 514–23
Sahn DJ, De Maria A, Kisslo J, et al. Recommendations regarding quantitation in M-mode echocardiography: results of a survey of echocardiographic measurements. Circulation 1978; 58: 1072–83
Devereux RB, Reichek N. Echocardiographic determination of left ventricular mass in man: anatomic validation of the method. Circulation 1977; 55: 613–8
Dubois D, Dubois EF. A formula to estimate the approximate surface area if height and weight be known. Arch Intern Med 1916; 17: 863–71
Savage DD, Garrison RJ, Kannel WB, et al. The spectrum of left ventricular hypertrophy in a general population sample: the Framingham study. Circulation 1987; 75Suppl. I: I-26–I-30
Devereux RB, Lutas EM, Casale PN, et al. Standardization of M-mode echocardiographic left ventricular anatomic measurements. J Am Coll Cardiol 1984; 4: 1222–30
Muiesan ML, Pasini GF, Salvetti M, et al. Cardiac and vascular structural changes. Prevalence and relation to ambulatory blood pressure in a middle-aged general population in northern Italy: the Vobarno Study. Hypertension 1996; 27: 1046–52
Rizzoni D, Muiesan ML, Porteri E, et al. Relations between cardiac and vascular structure in patients with primary and secondary hypertension. J Am Coll Cardiol 1998; 32: 985–92
Aalkjaer C, Eiskjaer H, Mulvany MJ, et al. Abnormal structure and function of isolated subcutaneous resistance vessels from essential hypertensive patients despite antihypertensive treatment. J Hypertens 1989; 7: 305–10
Mulvany MJ, Halpern W. Contractile properties of small resistance vessels in spontaneously hypertensive and normotensive rats. Circ Res 1977; 41(1): 19–26
Mulvany MJ, Hansen PK, Aalkjaer C. Direct evidence that the greater contractility of resistance vessels in sponta-neously hypertensive rats is associated with a narrowed lumen, a thickened media, and an increased number of smooth muscle cell layers. Circ Res 1978; 43(6): 854–64
Rizzoni D, Porteri E, Boari G, et al. Prognostic significance of small-artery structure in hypertension. Circulation 2003; 108: 2230–5
Rizzoni D, Porteri E, Guelfi D, et al. Structural alterations in subcutaneous small arteries of normotensive and hypertensive patients with non insulin dependent diabetes mellitus. Circulation 2001; 103: 1238–44
Mulvany MJ. Biophysical aspects of resistance vessels studied in spontaneous and renal hypertensive rats. Acta Physiol Scand 1988; 133Suppl. 571: 129–38
Olsen MH, Wachtell K, Meyer C, et al. Association between vascular dysfunction and reduced myocardial flow reserve in patients with hypertension: a LIFE substudy. J Human Hypertens 2004; 18: 445–52
Buus NH, Bottcher M, Bottker HE, et al. Reduced vasodilator capacity in syndrome X related to structure and function of resistance arteries. Am J Cardiol 1999; 83(2): 149–54
Muiesan ML, Rizzoni D, Salvetti A, et al. Structural changes in small resistance arteries and left ventricular geometry in patients with primary and secondary hypertension. J Hypertens 2002; 20: 1439–46
Schafer S, Kelm M, Mingers S, et al. Left ventricular remodelling impairs coronary flow reserve in hypertensive patients. J Hypertens 2002; 20: 1431–7
Vatner SF, Hittinger L. Coronary vascular mechanisms involved in decompensation from hypertrophy to heart failure. J Am Coll Cardiol 1993; 22Suppl. A: 34A–40A
Kozàkovà M, de Simone G, Morizzo C, et al. Coronary vasodilator capacity and hypertension-induced increase in left ventricular mass. Hypertension 2003; 41: 224–9
Thybo NK, Mulvany MJ, Jastrup B, et al. Some pharmacological and elastic characteristics of isolated subcutaneous small arteries from patients with essential hypertension. J Hypertens 1996; 14: 993–8
Intengan HD, Deng LY, Li JS, et al. Mechanics and composition of human subcutaneous resistance arteries in essential hypertension. Hypertension 1999; 33(Pt II): 569–74
Schiffrin EL. Remodeling of resistance arteries in essential hypertension and effects of antihypertensive treatment. Am J Hypertens 2004: 1192–1200
Thybo NK, Stephens N, Cooper A, et al. Effect of antihypertensive treatment on small arteries of patients with previously untreated essential hypertension. Hypertension 1995; 25(Pt 1): 474–81
Rizzoni D, Porteri E, De Ciuceis C, et al. Effects of treatment with candesartan or enalapril on subcutaneous small resistance artery structure in hypertensive patients with NIDDM. Hypertension 2005; 45(Pt 2): 659–65
Buus NH, Bottcher M, Jorgesen CG, et al. Myocardial perfusion during long-term angiotensin-converting enzyme inhibition or beta-blockade in patients with essential hypertension. Hypertension 2004; 44: 465–70
Mathiassen ON, Buus NH, Sihm I, et al. Small artery structure is an independent predictor of cardiovascular events in essential hypertension. J Hypertens 2007; 25: 1021–6
De Ciuceis C, Porteri E, Rizzoni D, et al. Structural alterations of subcutaneous small arteries may predict major cardiovascular events in hypertensive patients. Am J Hypertens 2007; 20: 846–52
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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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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