Key result
Q waves at high chest leads were present in 85% of recent anterior infarctions, compared to 0% of posterior infarctions and only 2 of 149 normal subjects.
Why the study?
Does the presence of Q waves in high chest leads differentiate anterior myocardial infarction from normal subjects and posterior infarction?
Population
425 cases, including 149 normal subjects, 32 cases of posterior infarction, and an unspecified number of…
Design
Cross-sectional
Authors
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Q waves in high chest leads may aid anterior MI differentiation; leaves open prospective validation in broader cohorts.
Observational (n=425)
Does the presence of Q waves in high chest leads differentiate anterior myocardial infarction from normal subjects and posterior infarction?
Q waves in high chest leads are highly specific for anterior myocardial infarction when bundle branch block and ventricular hypertrophy are excluded.
Zelman Freeman (1960) conducted an observational in Myocardial infarction (n=425). High chest leads (second intercostal space above V2 and middle of sternum at third intercostal space) was evaluated on Presence of Q waves at high chest leads. Q waves at high chest leads were present in 85% of recent anterior infarctions, compared to 0% of posterior infarctions and only 2 of 149 normal subjects.
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