Author/Authors :
Koizumi، نويسنده , , Tomomi and Yokoyama، نويسنده , , Masaki and Namikawa، نويسنده , , Susumu and Kuriyama، نويسنده , , Nehiro and Nameki، نويسنده , , Mizuo and Nakayama، نويسنده , , Takashi and Kaneda، نويسنده , , Hideaki and Sudhir، نويسنده , , Krishnankutty and Yock، نويسنده , , Paul G. and Komiyama، نويسنده , , Nobuyuki and Fitzgerald، نويسنده , , Peter J.، نويسنده ,
Abstract :
This study examined whether coronary focal vasospasm occurs in a nonuniform distribution within the coronary tree and whether a longitudinal plaque distribution pattern is present in patients with vasospastic angina using 3-dimensional intravascular ultrasound analysis. Of 121 patients with clinically suspected angina without fixed stenosis in the coronary arteries, vasospasm was provoked in 82 patients with 92 lesions (42 focal, 50 diffuse) by intravenous ergonovine maleate injection. Most focal vasospasms occurred in the proximal third of the coronary arteries (proximal 28, mid 8, distal 6, p <0.01), corresponding to the historical high-risk zones for acute coronary occlusion. More plaque burden also existed in the proximal third of the coronary arteries in patients with focal vasospasm.
