Stratificazione del rischio negli infarti senza onde Q: ruolo dell'ecocardiografia a riposo e da sforzo.

Translated title of the contribution: Stratification of risk in infarcts without Q wave: role of echocardiography at rest and during exertion

C. D. Vizza, F. Fedele, S. Sciomer, C. Iacoboni, F. Fabietti, L. R. Pastore, A. Dagianti

Research output: Contribution to journalArticle

Abstract

To assess the relation between the extent of myocardial necrosis and the presence of myocardium at risk in myocardial infarction without Q waves (NQMI) we studied by echocardiography the prevalence of jeopardized myocardium in a group of NQMI stratified on the basis of left ventricular wall motion (akinesis, hypokinesis, normal kinesis). We have studied 60 consecutive patients with non-Q myocardial infarction. Patients were examined by 2D echo at rest (V-VI day from the acute episode) and during symptoms limited bicycle ergometric test (ExT) (XX-XXX day). Regional left ventricular wall motion was evaluated as normal or asynergic (severe hypokinetic, akinetic) and the ExT was considered positive in case of new asynergic areas or ECG criteria. 2D echo at rest was technically satisfactory in 56 patients, 19 showed almost an akinetic segment (Aci) 17 had hypokinetic areas (Ipo) and 20 had normal left ventricle kinesis (Norc). Wall motion abnormalities were localized more frequently in the apex and lateral areas. During exercise 2D echo was performed in 46 patients (82%) with 23 positive tests (50%). Stratifying the population on the basis of left ventricle wall motion we observed a major number of positive tests in the group of patients with normal wall motion in comparison with those with asynergic areas at rest (Norc 66.6%, Ipo 35.7%, Aci 42.6% p less than 0.05 Nore vs Ipo and Nore vs Aci) despite the same CAD extension. These data show the heterogeneity of the NQMI that likely includes patients with transmural (asynergy group) and subendocardial MI (normal kinesis group), the latter with a higher degree of myocardium at risk.

Translated title of the contributionStratification of risk in infarcts without Q wave: role of echocardiography at rest and during exertion
Original languageItalian
Pages (from-to)303-309
Number of pages7
JournalCardiologia
Volume35
Issue number4
Publication statusPublished - Apr 1990

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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    Vizza, C. D., Fedele, F., Sciomer, S., Iacoboni, C., Fabietti, F., Pastore, L. R., & Dagianti, A. (1990). Stratificazione del rischio negli infarti senza onde Q: ruolo dell'ecocardiografia a riposo e da sforzo. Cardiologia, 35(4), 303-309.