Q-wave evolution of a first acute myocardial infarction without significant ST segment elevation

Barrabés, José A.; Figueras, Jaume; Moure, Cristina; Cortadellas, Josefa; Soler‐Soler, Jordi

doi:10.1016/s0167-5273(00)00413-7

Cited by 7 publications

(2 citation statements)

References 23 publications

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“…We measured the magnitude of ST‐segment elevation or depression in each lead to the nearest 0.5 mm from a scanned copy of the initial ECG. We defined Q waves as pathological when they had a duration of ≥30 ms in ≥2 contiguous leads or in the presence of an R wave of ≥40 ms in lead V1 and an R>S amplitude in lead V2 . The presence of possible confounding factors, such as bundle branch block, ventricular hypertrophy, or poor ECG quality, was noted.…”

Section: Methodsmentioning

confidence: 99%

“…We defined Q waves as pathological when they had a duration of ≥30 ms in ≥2 contiguous leads or in the presence of an R wave of ≥40 ms in lead V1 and an R>S amplitude in lead V2. 14 The presence of possible confounding factors, such as bundle branch block, ventricular hypertrophy, or poor ECG quality, was noted. We analyzed the following initial electrocardiographic variables: cardiac rhythm, heart rate, PR, QRS, and corrected QT interval duration, left ventricular hypertrophy (LVH) by Sokolow-Lyon criteria, pathological Q waves, number of leads with STsegment elevation or depression, total elevation of the ST segment, total depression of the ST segment (in both cases, the summation in millimeters in all the leads affected), and negative T waves.…”

Section: Electrocardiographic Analysesmentioning

confidence: 99%

See 1 more Smart Citation

Sex Differences in Timeliness of Reperfusion in Young Patients With ST‐Segment–Elevation Myocardial Infarction by Initial Electrocardiographic Characteristics

Gupta

Barrabés

Strait

et al. 2018

JAHA

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BackgroundYoung women with ST‐segment–elevation myocardial infarction experience reperfusion delays more frequently than men. Our aim was to determine the electrocardiographic correlates of delay in reperfusion in young patients with ST‐segment–elevation myocardial infarction.Methods and ResultsWe examined sex differences in initial electrocardiographic characteristics among 1359 patients with ST‐segment–elevation myocardial infarction in a prospective, observational, cohort study (2008–2012) of 3501 patients with acute myocardial infarction, 18 to 55 years of age, as part of the VIRGO (Variation in Recovery: Role of Gender on Outcomes of Young AMI Patients) study at 103 US and 24 Spanish hospitals enrolling in a 2:1 ratio for women/men. We created a multivariable logistic regression model to assess the relationship between reperfusion delay (door‐to‐balloon time >90 or >120 minutes for transfer or door‐to‐needle time >30 minutes) and electrocardiographic characteristics, adjusting for sex, sociodemographic characteristics, and clinical characteristics at presentation. In our study (834 women and 525 men), women were more likely to exceed reperfusion time guidelines than men (42.4% versus 31.5%; P<0.01). In multivariable analyses, female sex persisted as an important factor in exceeding reperfusion guidelines after adjusting for electrocardiographic characteristics (odds ratio, 1.57; 95% CI, 1.15–2.15). Positive voltage criteria for left ventricular hypertrophy and absence of a prehospital ECG were positive predictors of reperfusion delay; and ST elevation in lateral leads was an inverse predictor of reperfusion delay.ConclusionsSex disparities in timeliness to reperfusion in young patients with ST‐segment–elevation myocardial infarction persisted, despite adjusting for initial electrocardiographic characteristics. Left ventricular hypertrophy by voltage criteria and absence of prehospital ECG are strongly positively correlated and ST elevation in lateral leads is negatively correlated with reperfusion delay.

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Section: Methodsmentioning

confidence: 99%

Section: Electrocardiographic Analysesmentioning

confidence: 99%