Naslov
Relationship between QT dispersion and incidence of serious ventricular arrhythmias in patients with acute myocardial infarction

Autori
Zaputović, Luka ; Mavrić, Žarko ; Zaninović-Jurjević, Teodora ; Matana, Ante ; Bradić, Nikola

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of the 3RD Alpe-Adria Cardiology Meeting ; u: Cardiologia Hungarica. Supplement 24 (1995) (S3) / - , 1995, 45-45

Skup
Alpe-Adria Cardiology Meeting (3 ; 1995)

Mjesto i datum
Budimpešta, Mađarska, 17.05.1995. - 20.05.1995

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ventricular tachycardia; fibrillation; myocardial infarction

Sažetak
There is much controversy about the influence of QT dispersion on the incidence of ventricular tachycardia or fibrillation (VT/VF) in patients with acute myocaedial infarction. The QT, QTc, QRS and JT dispersion (QTd, QTcd, QRSd, JTd) between two groups of patients with acute myocardial infarction were compared: 33 patients with early VT/VF (Group 1) and 40 patients without such arrhythmias (Group 2). QTd, QTcd, QRSd and JTd were calculated from the admission and predischarge ECG, expressed as the difference between maximum and minimum of QT, QTc, QRS and JT interval duration in 12 leads. The coefficient of variability for each variable was also calculated (KQTd, KQTcd, KQRSd, KJTd). Groups did not differ significantly in age, incidence of previous infarction, Killip class, electrolyte status (K, Ca, Mg), infarction location, expected and final ECG infarct size, frequency of antiarrhythmic drug administration ; i.e. in variables that could influence the VT/VF occurance. Only higher frequency of thrombolytic treatment was noticed in Group 1 (61 vs 10%, p<0.001). On admission ECG patients with VT/VF had significantly greater QTd (80± ; 23 vs 45± ; 25 ms, p=0.013), QTcd (91± ; 27 vs 58± ; 36 ms, p=0.042) and JTd (76± ; 22 vs 45± ; 19 ms, p=0.016). KQTd was also significantly higher (6.72± ; 1.18 vs 4.47± ; 2.23 %, p=0.046). Although similar differences of QTd (64± ; 27 vs 45± ; 10 ms), QTcd (75± ; 30 vs 48± ; 12 ms), JTd (61± ; 24 vs 45± ; 25 ms) and KQTd (6.04± ; 2.59 vs 5.50± ; 0.43 %) existed on predischarge ECG, these differences were not significant. The results of this study indicate that QT dispersion dynamically varies during the illness, and that measurements of QT dispersion could be helpful in predicting serious ventricular arrhythmias.

Izvorni jezik
Engleski

Znanstvena područja
Kliničke medicinske znanosti

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