PURPOSE: Electrocardiographic (ECG) ST segment elevation lasting 2 or more weeks following Q wave @entity583 has been associated with ' @entity439 ' and absence of tissue viability. Regional @entity299 may reflect either viable @entity1562 or scar. Positron emission-tomographic (PET) imaging can distinguish viable from nonviable tissue. We hypothesized that @entity1 with chronic ST segment elevation after Q wave @entity1188 might demonstrate salvageable @entity1562 in the @entity1188 region. METHODS: The ECGs of 1,229 sequential @entity1 undergoing PET scans for viability assessment were reviewed by an electrocardiographer to identify individuals with chronic anteroseptal Q wave @entity1188 with persistent ST segment elevation exceeding 1 mV. @entity1 with QRS duration longer than 0.14 ms or rhythm other than sinus were excluded. Viability was considered present if either a reversible stress-induced perfusion defect ( @entity63 ) or a resting perfusion-metabolism mismatch (hibernation) was identified. RESULTS: Anteroseptal ECG Q wave @entity1188 was identified in 132 subjects (74% male, age 61 +/- 12 years). Chronic ST segment elevation was present in 84 subjects (64%) and absent in 48. Baseline clinical characteristics and left ventricular systolic function were similar in both groups. 63% of those with and 56% of those without chronic ST elevation had viable @entity1562 . No relationship was noted between chronic ST segment elevation and the presence or absence of @entity296 . CONCLUSIONS: Chronic ST segment elevation after anteroseptal Q wave @entity583 does not exclude @entity296 in the ' @entity1188 zone'. Evaluation of residual tissue viability is indicated to assess the benefit of revascularization in @entity1 with Q wave @entity1188 and chronic ST segment elevation.

Does chronic ST segment elevation following Q wave XXXX exclude tissue viability?

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity296 :: ('MESH:D009202', 'Disease') :: ['myocardial viability'] @entity63 :: ('MESH:D007511', 'Disease') :: ['ischemia'] @entity439 :: ('MESH:D000783', 'Disease') :: ['ventricular aneurysm'] @entity1188 :: ('MESH:D007238', 'Disease') :: ['infarctions', 'infarct', 'infarction'] @entity1562 :: ('MESH:D017682', 'Disease') :: ['myocardium'] @entity299 :: ('MESH:D006331', 'Disease') :: ['systolic dysfunction'] @entity583 :: ('MESH:D009203', 'Disease') :: ['myocardial infarction']
@entity583 :: (MESH:D009203,Disease) :: ['myocardial infarction']
