Attenuated coronary flow reserve and vascular remodeling in patients with hypertension and left ventricular hypertrophy

Objectives. The purpose of this study was to evaluate the association between hypertension and left ventricular hypertrophy (LVH) with both coronary vascular remodelling and endothelial function. Background. The association between endothelial and nonendothelial coronary flow reserve with vascular remodeling in patients with hypertension and LVH is still unclear. Methods. One hundred and eleven patients with normal or mildly diseased coronary arteries at angiography underwent intravascular ultrasound examination of the left anterior descending coronary artery. Patients were divided into three groups: group 1: n = 13, hypertensive patients with LVH; group 2: n = 30, hypertensive patients without LVH; group 3: n = 68, normotensive patients. Vessel and lumen area and antherosclerotic plaque area were evaluated. Vascular reactivity was examined using intracoronary adenosine and acetylcholine. Results. Vessel area in group 1 (with LVH) was significantly (p < 0.01 greater than that in group 2 (without LVH), whereas, vessel area in both groups 1 and 3 was similar (12.8 ± 0.8 mm², 10.7 = 0.4 mm² and 11.5 = 0.3 mm². Coronary blood flow at baseline for patients in group 1 (with LHV) was significantly greater than it was for patients in groups 2 and 3 (81.1 ± 9.9 ml/min, 56.5 ± 6.2 ml/min and 48.1 ± 3.2 ml/min, both p < 0.05). In comparison with groups 2 and 3, the response to both acetylcholine and adenosine was significantly impaired in patients with LVH. Conclusions. The current study demonstrates that hypertension LVH is associated with both coronary vascular remodeling and attenuated endothelial and nonendothelial coronary flow reserve. (C) 2000 by the American College of Cardiology.