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Prediction of sudden cardiac death after myocardial infarction in the beta-blocking era.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Huikuri, Heikki Tapanainen, Jari M. Lindgren, Kai S. Raatikainen, Pekka Mäkikallio, Timo Heikki Airaksinen, Karl Eino Juhani Myerburg, Robert Jerome |
| Copyright Year | 2003 |
| Abstract | OBJECTIVES This study assessed the predictive power of arrhythmia risk markers after an acute myocardial infarction (AMI). BACKGROUND Several risk variables have been suggested to predict the occurrence of sudden cardiac death (SCD), but the utility of these variables has not been well established among patients using medical therapy according to contemporary guidelines. METHODS A consecutive series of 700 patients with AMI was studied. The end points were total mortality, SCD, and nonsudden cardiac death (non-SCD). Nonsustained ventricular tachycardia (nsVT), ejection fraction (EF), heart rate variability, baroreflex sensitivity, signal-averaged electrocardiogram (SAECG), QT dispersion, and QRS duration were analyzed (n = 675). Beta-blocking therapy was used by 97% of the patients at discharge and by 95% at one and two years after AMI. RESULTS During a mean (+/-SD) follow-up of 43 +/- 15 months, 37 non-SCDs (5.5%) and 22 SCDs (3.2%) occurred. All arrhythmia risk variables differed between the survivors and those with non-SCD (e.g., the standard deviation of N-N intervals was 98 +/- 32 vs. 74 +/- 21 ms [p < 0.001] and the QRS duration was 103 +/- 22 vs.89 +/- 16 ms [p < 0.001]). Sudden cardiac death was weakly predicted only by reduced EF (<0.40; p < 0.05), nsVT (p < 0.05), and abnormal SAECG (p < 0.05), but not by autonomic markers or standard ECG variables. The positive predictive accuracy of EF, nsVT, and abnormal SAECG as predictors of SCD was relatively low (8%, 12%, and 13%, respectively). CONCLUSIONS The common arrhythmia risk variables, particularly the autonomic and standard ECG markers, have limited predictive power in identifying patients at risk of SCD after AMI in the beta-blocking era. |
| Starting Page | 279 |
| Ending Page | 282 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.onlinejacc.org/content/accj/42/4/652.full.pdf |
| PubMed reference number | 12932596v1 |
| Volume Number | 42 |
| Issue Number | 4 |
| Journal | Journal of the American College of Cardiology |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Acute myocardial infarction Anemia, Sickle Cell Baroreflex Cessation of life Ejection fraction (procedure) Electrocardiography Non-Sustained Ventricular Tachycardia by ECG Finding Patients Signal Peptides Sudden Cardiac Death Survivors Tachycardia, Ventricular Teratozoospermia Ventricular Dysfunction Ventricular Dysfunction, Left Ventricular Fibrillation |
| Content Type | Text |
| Resource Type | Article |
