Late potentials, QTc prolongation, and prediction of arrhythmic events after myocardial infarction
| Autor: | Kong I. Lie, Cees D.J. De Langen, Karin G. Faber, Ans C.P. Wiesfeld, Harry J.G.M. Crijns, Wiek H. van Gilst, Harry Wesseling, Tom J.M. Tobé |
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| Rok vydání: | 1994 |
| Předmět: |
Male
Myocardial Infarction Action Potentials Electrocardiography Risk Factors CARDIAC-ARREST PROGNOSTIC-SIGNIFICANCE Medicine Myocardial infarction Prospective Studies medicine.diagnostic_test SUPPRESSION TRIAL Signal Processing Computer-Assisted Middle Aged Signal-averaged electrocardiogram Survival Rate Anesthesia cardiovascular system Cardiology Female Cardiology and Cardiovascular Medicine circulatory and respiratory physiology medicine.medical_specialty AMBULATORY ELECTROCARDIOGRAMS ARRHYTHMIC EVENTS Sudden death QT interval CLINICAL-VARIABLES QRS complex SUDDEN-DEATH Predictive Value of Tests INTERVAL PROLONGATION Internal medicine Heart rate Confidence Intervals Reaction Time Humans TERMINAL QRS COMPLEX cardiovascular diseases VENTRICULAR PREMATURE BEATS LATE POTENTIALS SIGNAL-AVERAGED ELECTROCARDIOGRAM Aged business.industry Retarded potential Arrhythmias Cardiac medicine.disease QTE PROLONGATION business Follow-Up Studies |
| Zdroj: | International Journal of Cardiology, 46(2), 121-128. ELSEVIER IRELAND LTD |
| ISSN: | 0167-5273 |
| Popis: | In a series of 171 consecutive survivors of acute myocardial infarction, the predictive value of late potentials and QTc prolongation was prospectively assessed. QT intervals were measured in lead V-2, corrected QT (QTc) was calculated using Bazett's equation (cut-off value 440 ms). Late potentials were considered to be present when all of the three signal-averaged electrocardiographic variables were abnormal (i.e. QRS > 114 ms, D-40 > 38 ms, and V-40 440 ms was 1.1 (NS). In a multivariate analysis, the addition of QTc prolongation did not significantly improve the prognostic value of late potentials alone. It is concluded that late potentials are predictive of arrhythmic events after myocardial infarction, but the presence of concomitant QTc prolongation does not worsen the prognosis. |
| Databáze: | OpenAIRE |
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