Back to Search
Start Over
Prognostic value of average T-wave alternans and QT variability for cardiac events in MADIT-II patients
- Source :
- Journal of Electrocardiology. 46:480-486
- Publication Year :
- 2013
- Publisher :
- Elsevier BV, 2013.
-
Abstract
- Background Identifying which patients might benefit the most from ICD therapy remains challenging. We hypothesize that increased T-wave alternans (TWA) and QT variability (QTV) provide complementary information for predicting appropriate ICD therapy in patients with previous myocardial infarction and reduced ejection fraction. Methods We analyzed 10-min resting ECGs from MADIT-II patients with baseline heart rate > 80 beats/min. TWA indices IAA and IAA 90 were computed with the multilead Laplacian Likelihood ratio method. QTV indices QTVN and QTVI were measured using a standard approach. Cox proportional hazard models were adjusted considering appropriate ICD therapy and sudden cardiac death (SCD) as endpoints. Results TWA and QTV were measured in 175 patients. Neither QTV nor TWA predicted SCD. Appropriate ICD therapy was predicted by combining IAA 90 and QTVN after adjusting for relevant correlates. Conclusion Increased TWA and QTV are independent predictors of appropriate ICD therapy in MADIT-II patients with elevated heart rate at baseline.
- Subjects :
- Male
medicine.medical_specialty
Myocardial Infarction
Sensitivity and Specificity
Sudden cardiac death
Risk Factors
Internal medicine
Outcome Assessment, Health Care
Heart rate
Prevalence
Humans
Medicine
Diagnosis, Computer-Assisted
Myocardial infarction
Qt variability
Ejection fraction
business.industry
Patient Selection
Reproducibility of Results
T wave alternans
Middle Aged
Prognosis
medicine.disease
Survival Analysis
Icd therapy
Defibrillators, Implantable
Survival Rate
Death, Sudden, Cardiac
Treatment Outcome
Electrocardiography, Ambulatory
Cardiology
Female
Madit ii
Cardiology and Cardiovascular Medicine
business
Subjects
Details
- ISSN :
- 00220736
- Volume :
- 46
- Database :
- OpenAIRE
- Journal :
- Journal of Electrocardiology
- Accession number :
- edsair.doi.dedup.....55a5c5458fa720d39a38c69ae9282fab