Background: Cardiac rupture is a leading cause of death among patients hospitalized for acute myocardial infarction (AMI). The aim of our retrospective study was to evaluate the impact of primary coronary angioplasty (PTCA) on this not common but usually fatal complication.
Methods: Since January 1998 PTCA has been the routine treatment for AMI patients in our Institution monitored during the first 12 hours from symptom onset. The AMI patients hospitalized between January 1998 and December 1999 (Group A) were retrospectively compared to those observed between January 1996 and December 1997 (Group B, historical control group), mainly treated with systemic thrombolysis. Patients hospitalized after 12 hours of symptom onset were excluded from the study. Data were analyzed on an intention-to-treat design.
Results: Group A consisted of 204 patients (148 males, 56 females, mean age 67 +/- 11 years), 165 (81%) of whom underwent coronary angiography. Group B consisted of 185 patients (123 males, 62 females, mean age 71 +/- 12 years), 78 (42%) of whom were treated with thrombolysis and 33 (18%) with PTCA. The groups did not differ as regards the time delay before hospital entry, Killip class at admission and site of AMI. Fourteen patients (6.8 %) of Group A and 20 (10.8%) of Group B died in the Cardiology Division. No deaths due to cardiac rupture were observed among the 165 Group A patients, nor among the 33 Group B patients treated with PTCA. Cardiac rupture was the cause of death for 1 out of 14 (7%) patients in Group A, and for 8 out of 20 (40%) patients in Group B (p < 0.02 Group A vs Group B). Nine Group A patients and 11 Group B patients died because of cardiogenic shock.
Conclusion: A lower cardiac rupture incidence was observed among Group A patients in comparison to those of Group B. Thus our data, although not randomized, suggest the ability of primary PTCA in preventing post-AMI cardiac rupture.
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