Q waves and transmural infarcts: The terms are not the same

Ideker, RE; Wagner, G.; Reimer, K. A.; Alonso,; Sp, Bishop; Bloor, C. M.; Jt, Fallon; Gottlieb, GJ; Db, Hackel; Phillips, HR; Roark, Steven F.; Wj, Rogers; Ruth, WK; Savage, RM; Selvester, R. H.; Ward, RM

doi:10.1016/0002-9149(81)90931-0

Cited by 3 publications

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“…Different scoring systems for quantifying the extent of MI from the ECG have been developed. The Selvester QRS scoring system has proved its validity in the diagnosis, size esti mation and outcome prediction of MI [4][5][6][7], The scoring system has also been proven to predict LVEF immediate ly following an acute MI in the absence of thrombolytic KARC.FR therapy [8] where any depression in LVEF must be due to necrosis. A decreased pre-CABG LVEF has been shown by Hinohora ct al.…”

Section: Introductionmentioning

confidence: 99%

Serial Prognostic Capabilities of Electrocardiographic Indices of Infarcted and Hibernating Myocardium in Predicting Short- and Long-Term-Outcome following Coronary Artery Bypass Surgery

Holmvang

Lyck

Clemmensen³

et al. 1997

Cardiology

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The present study was performed to test the hypothesis that patients with a large amount of ischemic (hibernating) myocardium are most likely to develop a perioperative myocardial infarction undergoing coronary artery bypass grafting (CABG). Furthermore, we evaluated the Selvester QRS scoring system as a postoperative prognostic tool. A relationship between a high amount of hibernating myocardium determined by ventriculographic and electrocardiographic investigations and an increased risk of perioperative myocardial infarction was found. The Selvester QRS scoring system used in diagnosing and prognosing after acute myocardial infarction was proven valid in predicting prognosis after CABG as well.

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Section: Introductionmentioning

confidence: 99%

Serial Prognostic Capabilities of Electrocardiographic Indices of Infarcted and Hibernating Myocardium in Predicting Short- and Long-Term-Outcome following Coronary Artery Bypass Surgery

Holmvang

Lyck

Clemmensen³

et al. 1997

Cardiology

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Subendocardial Versus Transmural Infarction

Ideker¹

1985

Acute Coronary Care

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Electrocardiographic effects of experimental nontransmural myocardial infarction.

Mirvis¹,

Ingram²,

Holly³

et al. 1985

Circulation

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Clinical and experimental data have documented the ability of nontransmural myocardial infarction to produce abnormal Q waves on both the epicardial and body surfaces. We undertook this study to define the anatomic determinants of such Q wave development. Thirty dogs were studied before and after occlusion-reperfusion (26 dogs) or latex embolization (four dogs) of the left circumflex coronary artery. Occlusion was maintained for 60 to 240 min before reperfusion to produce nontransmural lesions of various sizes. Electrocardiographic data were registered from 84 torso electrodes by body surface mapping techniques before and 1 week after infarction. Infarct size was quantitated by computer analysis of heart slices stained with triphenyl tetrazolium chloride. Six dogs did not develop infarction. Of the remaining 24, 10 did and 14 did not develop significant changes in body surface Q wave duration and width. The incidence of Q wave changes was not different in dogs with nontransmural and those with transmural lesions. Infarct size (expressed as a percentage of the left ventricle infarcted), the percentage of endocardium subjacent to infarction, the average depth of necrosis, the percent of the four outer fifths of the ventricular wall infarcted, and the duration of occlusion were significantly (p < .05) greater in dogs with than in those without Q wave changes. Logistic regression modeling demonstrated that only two anatomic parameters percentage of left ventricle infarcted and average lesion depth significantly and independently predicted Q wave development. A model including only these two variables accurately classified all 24 cases. Thus, nontransmural infarction can produce abnormal body surface Q waves, and the development of new Q waves after infarction is statistically dependent on overall infarct size as well as average transmural extent of necrosis.

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Q waves and transmural infarcts: The terms are not the same

Cited by 3 publications

References 0 publications

Serial Prognostic Capabilities of Electrocardiographic Indices of Infarcted and Hibernating Myocardium in Predicting Short- and Long-Term-Outcome following Coronary Artery Bypass Surgery

Serial Prognostic Capabilities of Electrocardiographic Indices of Infarcted and Hibernating Myocardium in Predicting Short- and Long-Term-Outcome following Coronary Artery Bypass Surgery

Subendocardial Versus Transmural Infarction

Electrocardiographic effects of experimental nontransmural myocardial infarction.

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