inflatable balloon catheters were positioned around the left anterior descending coronary arteries ( lad ) of 54 hearts or the proximal left circumflex coronary arteries of three hearts for study of the following intervals of coronary occlusion : a ) 10 minutes followed by 20 minutes of reflow , b ) 40 minutes followed by either no reflow or by 20 minutes of reflow , and c ) 60 minutes without reflow .
C0226032
left anterior descending coronary arteries
C0018787
hearts