QUANTIFICATION OF RECRUITABLE CORONARY COLLATERAL BLOOD-FLOW IN CONSCIOUS HUMANS AND ITS POTENTIAL TO PREDICT FUTURE ISCHEMIC EVENTS

被引：176

作者：

PIJLS, NHJ ^{[1
]}

BECH, GJW ^{[1
]}

ELGAMAL, MIH ^{[1
]}

BONNIER, HJRM ^{[1
]}

DEBRUYNE, B ^{[1
]}

VANGELDER, B ^{[1
]}

MICHELS, HR ^{[1
]}

KOOLEN, JJ ^{[1
]}

机构：

[1] CTR CARDIOVASC, AALST, BELGIUM

来源：

JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY | 1995年 / 25卷 / 07期

关键词：

D O I：

10.1016/0735-1097(95)00111-G

中图分类号：

R5 [内科学];

学科分类号：

1002 [临床医学]; 100201 [内科学];

摘要：

Objectives. The present study was designed to evaluate the applicability of a pressure-flow equation for quantitative calculation of recruitable collateral blood flow at coronary artery occlusion in conscious patients and to investigate the value of that index to predict future ischemic events. Background. Recent experimental studies have indicated that recruitable collateral blood flow at coronary artery occlusion can be expressed as a fraction of normal maximal myocardial blood flow by simultaneous recordings of mean arterial, coronary wedge and central venous pressures, respectively. This index is called the pressure-derived fractional collateral bow and is independent of hemodynamic loading conditions. Methods. In 120 patients undergoing elective coronary angioplasty, mean arterial, coronary wedge and central venous pressures were measured at balloon inflations of 2 min. All patients had a recent exercise electrocardiogram (ECG) with positive findings showing clearly distinguishable, reversible ECG abnormalities, enabling recognition of ischemia at balloon inflation. Fractional collateral blood flow at angioplasty was calculated by coronary wedge pressure minus central venous pressure divided by mean arterial pressure minus central venous pressure and correlated to the presence or absence of ischemia at balloon inflation. Ischemic events were monitored during a follow-up period of 6 to 22 months. Results. In 90 of the 120 patients, ischemia was present at balloon inflation, and in 82 of these patients, fractional collateral blood flow was less than or equal to 23%. By contrast, in 29 patients, no ischemia was present, and fractional collateral blood how was >24% in all 29. During the follow-up period, 16 patients had an ischemic event. Fifteen of these 16 patients were in the group with insufficient collateral flow (p < 0.05). Conclusions. To our knowledge, this study presents the first method for quantitative assessment of recruitable collateral blood flow in humans in the catheterization laboratory. Sufficient and insufficient collateral circulation can be reliably distinguished by this method. Use of this method can also help to provide more insight into the extent and behavior of the collateral circulation for investigational purposes and may have potential clinical implications.

引用

页码：1522 / 1528

页数：7

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