197 The extent of left ventricular dysfunction in patients with anterior myocardial infarction: Q versus non-Q

1999 ◽  
Vol 1 ◽  
pp. S36-S36
Author(s):  
C OSULLIVAN ◽  
I RAMZY ◽  
D GIBSON ◽  
M HENEIN
Keyword(s):  
Myocardial Infarction ◽  
Left Ventricular Dysfunction ◽  
Ventricular Dysfunction ◽  
Left Ventricular ◽  
Anterior Myocardial Infarction

Impact of increased infarct transmurality on remodeling and function during healing after anterior myocardial infarction in the dog

1992 ◽  
Vol 70 (7) ◽  
pp. 949-958 ◽  
Author(s):  
Bodh I. Jugdutt ◽  
Mohammad I. Khan
Keyword(s):  
Myocardial Infarction ◽  
Left Ventricular Dysfunction ◽  
Ventricular Dysfunction ◽  
Left Ventricular ◽  
Coronary Artery Ligation ◽  
Anterior Myocardial Infarction ◽  
Infarct Transmurality ◽  
Infarct Expansion ◽  
Group 2 ◽  
And Function

To determine the impact of greater infarct transmurality on changes in left ventricular remodeling and function after acute anterior myocardial infarction, serial topographic and functional parameters (two-dimensional echocardiograms) and hemodynamics over 6 weeks, and postmortem topography (planimetry) at 6 weeks, were measured in chronically instrumented dogs randomized to standard coronary artery ligation (group 1) or a modified lower ligation plus collateral obliteration to decrease collateral inflow and increase transmurality (group 2). At 6 weeks, postmortem scar size and collagen were similar in the two groups, but group 2 had greater transmurality associated with more necrosis relative to area at risk, Q waves, infarct expansion, thinning, regional bulging, and cavity dilatation. Over the 6 weeks, group 2 showed more early expansion, late thinning and regional bulging in the short axis, larger diastolic and systolic volumes, and more apical aneurysmal bulging in the long-axis, reflecting more topographic deterioration. More important, group 2 showed greater regional and global left ventricular dysfunction over 6 weeks, lower ejection fraction at 2 days with further decrease over 6 weeks, and more left ventricular thrombus, ventricular arrhythmias, and deaths. In addition, transmurality correlated with the severity of remodeling and dysfunction. The findings indicate that transmurality is a major determinant of remodeling and left ventricular dysfunction during healing after anterior infarction.Key words: infarct expansion, echocardiography, aneurysm, Q wave infarction.

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