title: Detection of postischemic regional left ventricular delayed outward wall motion or diastolic stunning after exercise-induced ischemia in patients with stable effort angina by using color kinesis.
abstract: To determine whether postischemic diastolic stunning could be detected using color kinesis, we evaluated regional left ventricular (LV) diastolic wall motion in 36 patients with stable effort angina and a coronary stenosis (> or = 70% of luminal diameter), and in 30 control subjects. Regional LV filling fraction in the short-axis view during the first 30% of the LV filling time (color kinesis diastolic index) was determined before, 20 minutes, 1 hour, and 24 hours after the treadmill exercise test. In 33 of the 36 patients (92%), new regional LV delayed outward motion during early diastole (color kinesis diastolic index < or = 40%) was detected at 20 minutes after exercise. The regional LV delayed diastolic wall motion showed significant improvement but persisted 1 hour afterward in 20 of 36 patients (56%), and disappeared 24 hours after exercise. Detection of regional stunned myocardium with impaired diastolic function may be a useful tool for the diagnosis of coronary artery disease.
authors.affiliation: Department of Cardiology, Kansai Denryoku Hospital, Osaka, Japan. ishii.katsuhisa@b2.kepco.co.jp
authors.forename: Katsuhisa
authors.initials: K
authors.lastname: Ishii
authors.forename: Kunihisa
authors.initials: K
authors.lastname: Miwa
authors.forename: Takahiro
authors.initials: T
authors.lastname: Sakurai
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Kataoka
authors.forename: Makoto
authors.initials: M
authors.lastname: Imai
authors.forename: Aya
authors.initials: A
authors.lastname: Kintaka
authors.forename: Takeshi
authors.initials: T
authors.lastname: Aoyama
authors.forename: Masaki
authors.initials: M
authors.lastname: Kawanami
mesh_terms: D000787:Angina Pectoris / Q000000981:diagnostic imaging*; D003971:Diastole; D018618:Echocardiography, Doppler, Color / Q000379:methods*; D005080:Exercise Test; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000000981:diagnostic imaging*; D017682:Myocardial Stunning / Q000000981:diagnostic imaging*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging*