title: Frequency and implication of ST-T abnormalities on hospital admission electrocardiograms in patients with type A acute aortic dissection.
abstract: Although patients with Stanford type A acute aortic dissection often show ST-T abnormalities at presentation, the frequency and implication of such findings remain unclear. To clarify these points, admission electrocardiograms from 233 patients admitted ≤6 hours after symptom onset who underwent emergency surgery for type A acute aortic dissection were studied. The prevalence of electrocardiographic (ECG) patterns was 51% for ST-T abnormalities (4% for ST-segment elevation and 47% for ST-segment depression and/or negative T waves), 30% for normal ECG findings or no significant ST-T changes, and 19% for ECG confounders such as bundle branch block or left ventricular hypertrophy. Patients with ST-T abnormalities had higher prevalence of pericardial effusion (48% vs 9% and 38%), cardiac tamponade (28% vs 3% and 18%), moderate or severe aortic regurgitation (28% vs 7% and 18%), shock on admission (34% vs 3% and 13%), coronary ostial involvement (14% vs 1% and 2%), concomitant coronary artery bypass surgery (9% vs 1% and 0%), and in-hospital mortality (11% vs 1% and 4%) compared with patients with normal ECG findings or no significant ST-T changes and those who had ECG confounders (p <0.05 for all). On multivariate analysis, ST-T abnormalities were the only independent predictor of in-hospital mortality (odds ratio 3.87, 95% confidence interval 1.02 to 14.7, p = 0.035). In conclusion, about 50% of patients who underwent emergency surgery for type A acute aortic dissection had ST-T abnormalities, characterized predominantly by ST-segment depression or negative T waves, in the acute phase. ST-T abnormalities were associated with more complicated features and independently predicted in-hospital death.
authors: Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan. masami-kosuge@pop06.odn.ne.jp
authors: Masami
authors: M
authors: Kosuge
authors: Keiji
authors: K
authors: Uchida
authors: Kiyotaka
authors: K
authors: Imoto
authors: Naoki
authors: N
authors: Hashiyama
authors: Toshiaki
authors: T
authors: Ebina
authors: Kiyoshi
authors: K
authors: Hibi
authors: Kengo
authors: K
authors: Tsukahara
authors: Nobuhiko
authors: N
authors: Maejima
authors: Munetaka
authors: M
authors: Masuda
authors: Satoshi
authors: S
authors: Umemura
authors: Kazuo
authors: K
authors: Kimura
mesh_terms: D000368:Aged; D000784:Aortic Dissection / Q000175:diagnosis* / Q000401:mortality / Q000601:surgery; D017545:Aortic Aneurysm, Thoracic / Q000175:diagnosis* / Q000401:mortality / Q000601:surgery; D002037:Bundle-Branch Block / Q000175:diagnosis; D015897:Comorbidity; D001026:Coronary Artery Bypass; D004562:Electrocardiography; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D017379:Hypertrophy, Left Ventricular / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D010343:Patient Admission; D011379:Prognosis; D012307:Risk Factors; D012815:Signal Processing, Computer-Assisted