Mismatch between localization of Q waves in 12-lead electrocardiogram and localization of myocardial infarction at magnetic resonance imaging (Contributo in atti di convegno)

Type
Label
  • Mismatch between localization of Q waves in 12-lead electrocardiogram and localization of myocardial infarction at magnetic resonance imaging (Contributo in atti di convegno) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Rovai D.; Di Bella G.; Rossi G.; Strata E.; Lombardi M.; L'Abbate A.; Pingitore A. (2006)
    Mismatch between localization of Q waves in 12-lead electrocardiogram and localization of myocardial infarction at magnetic resonance imaging
    in World Congress of Cardiology, Barcellona
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Rovai D.; Di Bella G.; Rossi G.; Strata E.; Lombardi M.; L'Abbate A.; Pingitore A. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • In: World Congress of Cardiology (Barcellona, 2-6 settembre 2006). Proceedings, pp. 49-51. European Society of Cardiology 1997-2005 (ed.). ESC Congress Reports, 2006. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • ABSTRACT: The electrocardiogram (ECG) is currently utilized to define the localization of myocardial infarction (MI), which can be precisely studied in vivo by contrast-enhanced magnetic resonance imaging (MRI). The aim of this study was to investigate whether the localization of pathologic Q waves (duration 0.04 sec or QS pattern in at least two contiguous leads) reflects the anatomical localization of MI at contrast-enhanced MRI. In a group of patients with one old MI (age 62 ± 11 years), undergoing contrast-enhanced MRI, a 12-lead ECG was recorded and analyzed by two experienced cardiologists. Patients with Left Bundle Branch Block were excluded. The infarction was classified as anterior (Q waves in V1-V4), inferior (Q waves in II, III, aVF), lateral (Q waves in V5, V6, I, aVL or great and broad R wave in V2) or non-Q-wave. Contrast-enhanced MRI images were analyzed by a semi-automatic program that divided left ventricular myocardium according to a 17 segment model and calculated the percent of MI in each segment. The segments were attributed to the classical perfusion territories of left anterior descending (LAD), right (RCA) or left circumflex (LCx) coronary arteries. Of the entire group of 90 patients, 13 had a purely anterior MI at ECG, 13 a purely inferior, 11 a purely lateral and 11 a non-Q wave MI. In the patients with purely anterior MI, 80% of the infarction was localized in the LAD perfusion territory; however, 14% of the infarction was localized in the RCA and 6% in the LCx perfusion territories. In the patients with purely inferior MI, 57% of the infarction was localized in the RCA, 13% in the LAD and 30% in the LCx perfusion territory. In the patients with purely lateral MI, 27% of the infarction was localized in the LCx, 39% in the LAD and 34% in the RCA perfusion territory. In non-Q-wave MI patients 50% of the infarction was localized in the LAD, 30% in the RCA and 20% in the LCx perfusion territory. At MRI the infarction was localized solely in the LAD perfusion territory in 11 patients, solely in the RCA perfusion territory in 10 patients and solely in the LCx perfusion territory in 6 patients; the ECG showed a purely anterior, a purely inferior or a purely lateral MI in only 4 (36%), 4 (40%) and 2 (33%) of these patients, respectively. In conclusion, the localization of pathologic Q waves weakly predicts the anatomical location of MI. (literal)
Titolo
  • Mismatch between localization of Q waves in 12-lead electrocardiogram and localization of myocardial infarction at magnetic resonance imaging (literal)
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