Natural history of chronic left ventricular aneurysm; a population based cohort study
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CitationJ Clin Epidemiol. 1991, 44(11):1131-9
AbstractIn order to evaluate the morbidity and mortality of chronic left ventricular aneurysm a population based cohort study was carried out. All cardiac catheterizations performed in Iceland during the years 1983-1985 were examined (n = 1261). Sixty seven patients with left ventricular aneurysm defined as: (1) normal diastolic contour with segmental dyskinesis (n = 6), (2) abnormal diastolic contour with (a) akinetic (n = 36) or (b) dyskinetic (n = 25) segments in systole, were included. Sixty seven patients with normal diastolic contour and akinetic segments in systole served as controls. The groups had similar mean age, sex ratio, number of diseased vessels and left ventricular end diastolic pressure. Mean ejection fraction was significantly lower in the aneurysm group (46 vs 56%, p = 0.00005). Collaterals were detected significantly more often in controls (88 vs 72%, p = 0.03). At follow up in 1989, 19 in the aneurysm group had died as compared to 12 in the control group. Life table analysis revealed significant differences between survival curves. The relative risk ratio was 2.18 with 95% confidence interval of 1.00-4.74 (p less than 0.05). However, when the amount of myocardial damage was taken into account the differences in survival were no longer statistically significant (relative risk ratio 1.77 with 95% confidence interval of 0.79-3.99). We conclude that the reduced survival probability of patients with chronic left ventricular aneurysm in comparison to controls with akinetic scars is accounted for by the more extensive myocardial damage and not by the presence of aneurysm per se.
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