Key result
Surgery for post-MI mechanical complications carries ~37% in-hospital mortality despite favorable long-term survival in survivors.
Why the study?
Mechanical complications after acute myocardial infarction are rare but potentially fatal, and surgery is challenging yet considered the treatment of choice; early and long-term surgical outcomes remain incompletely characterized.
Cohort (n=720)
Yes
Although surgical treatment for post-infarction mechanical complications carries a high in-hospital mortality of 37.4%, patients who survive the peri-operative period demonstrate an encouraging 10-year survival rate of 65.7%.
High perioperative mortality warrants cautious surgical selection; leaves open optimal timing and adjunctive strategies in post-MI mechanical complications.
AIMS: Mechanical complications (MCs) are rare but potentially fatal sequelae of acute myocardial infarction (AMI). Surgery, though challenging, is considered the treatment of choice. The authors sought to study the early and long-term results of patients undergoing surgical treatment for post-AMI MCs. METHODS AND RESULTS: Patients who underwent surgical treatment for post-infarction MCs between 2001 through 2019 in 27 centres worldwide were retrieved from the database of the CAUTION study. In-hospital and long-term mortality were the primary outcomes. Cox proportional hazards regression models were used to determine independent factors associated with overall mortality. The study included 720 patients. The median age was 70.0 [62.0-77.0] years, with a male predominance (64.6%). The most common MC encountered was ventricular septal rupture (VSR) (59.4%). Cardiogenic shock was seen on presentation in 56.1% of patients. In-hospital mortality rate was 37.4%; in more than 50% of cases, the cause of death was low cardiac output syndrome (LCOS). Late mortality occurred in 133 patients, with a median follow-up of 4.4 [1.0-8.6] years. Overall survival at 1, 5, and 10 years was 54.0, 48.1, and 41.0%, respectively. Older age (P < 0.001) and post-operative LCOS (P < 0.001) were independent predictors of overall mortality. For hospital survivors, 10-year survival was 65.7% and was significantly higher for patients with VSR than those with papillary muscle rupture (long-rank P = 0.022). CONCLUSION: Contemporary data from a multicentre cohort study show that surgical treatment for post-AMI MCs continues to be associated with high in-hospital mortality rates. However, long-term survival in patients surviving the immediate post-operative period is encouraging.
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Matteucci et al. (2024) conducted a cohort in Post-infarction mechanical complications (n=720). Surgical treatment was evaluated on In-hospital mortality. Surgical treatment for post-infarction mechanical complications was associated with a high in-hospital mortality rate of 37.4%, though hospital survivors had an encouraging 10-year survival of 65.7%.
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