Coronary atherosclerotic plaque extent in hypertensive patients detected by computed tomographic angiography

Abstract

Objective To evaluate the extent of coronary artery calcium in hypertensive patients using multislice computed tomography. Background Uncontrolled hypertension is one of the most common determinants for hospital admissions owing to acute coronary events. Computed tomographic (CT) coronary calcium scoring has been established as the best noninvasive predictor of atherosclerotic cardiovascular risk available today. Patients and methods The present study was conducted on 90 patients with recurrent chest pain referred for coronary multislice computed tomography angiography at Kobry El-Kobba Military Hospital. Patients comprised 69 hypertensive patients and 21 normotensive patients. Full history taking, laboratory investigation, coronary CT angiography, coronary plaque distribution, and coronary artery calcium scoring (CACS) were done. Results There was no statistically significant difference between the studied groups regarding mid left anterior descending (LAD) obstruction, distal LAD obstruction, proximal left circumflex (LCX) obstruction and distal LCX obstruction, proximal right coronary artery (RCA) obstruction, mid RCA obstruction, and distal RCA obstruction. However, hypertensive patients had significantly higher rate of 1–49% proximal LAD obstruction (P = 0.015) and mid LCX 1–49% and more than or equal to 50% obstruction (P = 0.034). Moreover, nonhypertensive patients had significantly higher number of patients with nonaffected vessels. Hypertensive patients had significantly higher rate of two-vessel affection. Moreover, hypertensive patients had significantly higher CACS, atheroma burden obstructive score, segment involvement score, and segment stenosis scored syntax I score compared with nonhypertensive patients. Conclusion Hypertension is associated with higher rate of coronary artery stenosis as shown by CT angiography. Hypertension is associated with increasing CACS.