Abstract:
:A recently developed platelet aggregometer using a laser light scattering method is capable of monitoring the increase in size of small-sized platelet aggregates (diameter 9-25 microm), which cannot be detected with the conventional methods. Whether coronary spasm can cause platelet aggregation in the coronary circulation is unknown. We investigated platelet aggregation, especially small-sized platelet aggregates, simultaneously in the coronary sinus and the aortic root in 18 patients with coronary spastic angina before and after a left coronary artery spasm induced by intracoronary injection of acetylcholine, and in 15 patients with stable exertional angina before and after acute myocardial ischemia induced by rapid right atrial pacing. Platelet aggregation in 12 patients with chest pain syndrome was also examined before and after coronary spasms provoked by acetylcholine. The number of small-sized platelet aggregates increased significantly in the coronary sinus [2.0+/-0.6 x 104 to 4.1+/-1.0 x 104 (V), P<.01] and in the aortic root [1.7+/-0.6 x 104 to 3.2+/-0.6 x 104 (V), P<.05], and the coronary sinus-arterial difference in the number of small-sized platelet aggregates [2.3+/-1.9 x 103 to 1.1+/-0.4 x 104 (V), P<.01] increased significantly after attacks in the coronary spastic angina group, but remained the same in the stable exertional angina group after attacks and in the chest pain syndrome group after the administration of acetylcholine. Therefore, we can conclude that acute myocardial ischemia induced by coronary spasm causes platelet aggregation in the coronary circulation.
journal_name
Thromb Resjournal_title
Thrombosis researchauthors
Miyamoto S,Ogawa H,Soejima H,Takazoe K,Kajiwara I,Shimomura H,Sakamoto T,Yoshimura M,Kugiyama K,Yasue H,Ozaki Ydoi
10.1016/s0049-3848(01)00333-4subject
Has Abstractpub_date
2001-09-01 00:00:00pages
377-86issue
5eissn
0049-3848issn
1879-2472pii
S0049-3848(01)00333-4journal_volume
103pub_type
临床试验,杂志文章abstract::Coronary artery disease (CAD) continues to be the most frequent cause of death among women in the United States. Although elevated levels of clotting factors have been associated with CAD, few of these studies have been performed in women. Elevated levels of Factor XI have previously been associated with venous thromb...
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pub_type: 临床试验,杂志文章,随机对照试验
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doi:10.1016/0049-3848(95)00062-v
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doi:10.1016/j.thromres.2014.11.020
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journal_title:Thrombosis research
pub_type: 杂志文章
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pub_type: 杂志文章
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