Troponin-I Level After Major Noncardiac Surgery and Its Association With Long-Term Mortality

Area of Science:

• Cardiology
• Perioperative Medicine
• Surgical Outcomes

Background:

• Major noncardiac surgery poses risks for patients with intermediate to high cardiac risk.
• Perioperative myocardial ischemic injury is a significant concern in this patient population.

Purpose of the Study:

• To investigate the long-term clinical impact of elevated postoperative cardiac troponin-I levels.
• To assess the association between troponin-I elevation and all-cause mortality after major noncardiac surgery.

Main Methods:

• Retrospective analysis of 750 patients aged 50 years or older undergoing major noncardiac surgery.
• Collection of postoperative cardiac troponin-I data and tracking of all-cause mortality over a median follow-up of 1727 days.

Main Results:

• 12.2% of patients had elevated troponin-I (>0.10 ng/mL), with significantly higher operative mortality (RR: 4.23).
• Elevated troponin-I was independently associated with increased all-cause mortality (RR: 1.73) in Cox regression analysis.
• The increased mortality risk linked to troponin-I elevation was primarily observed within the first six months post-surgery, diminishing thereafter.

Conclusions:

• Postoperative troponin-I elevation is a significant predictor of short-term mortality after major noncardiac surgery.
• While troponin-I elevation impacts early mortality, its long-term prognostic value beyond six months appears limited.
• Risk stratification and monitoring strategies may need to consider the temporal pattern of troponin elevation.