Very Low Risk for In-hospital Adverse Outcome Such as ST-elevation or Non-ST-elevation Myocardial Infarction in...

Area of Science:

• Cardiology
• Orthopedic Surgery
• Health Outcomes Research

Background:

• Knee surgery is a prevalent orthopedic procedure.
• The incidence of cardiac complications following knee surgery is generally considered low.
• However, specific data on adverse cardiac events like myocardial infarction are limited.

Purpose of the Study:

• To evaluate the occurrence of adverse cardiac outcomes, specifically ST-elevation myocardial infarction (STEMI) and Non-ST-elevation myocardial infarction (NSTEMI), in patients undergoing inpatient knee surgery.
• To assess the risk of myocardial infarction in a large cohort of patients undergoing knee surgery.

Main Methods:

• Utilized the National Inpatient Sample (NIS) database for a comprehensive analysis.
• Examined two random samples from 2005 and 2014, representing a decade-long period.
• Included a total of 7,444 inpatient knee surgery cases.

Main Results:

• The incidence of STEMI and NSTEMI was found to be very low in both sampled years.
• In 2005, 1 STEMI (0.0%) and 4 NSTEMI (0.1%) events occurred.
• In 2014, 0 STEMI (0.0%) and 5 NSTEMI (0.16%) events were recorded.
• Overall, STEMI or NSTEMI occurred in only 0.13% of all analyzed inpatient knee surgeries.

Conclusions:

• Adverse cardiac outcomes, including myocardial infarction, are infrequent in patients undergoing knee surgery.
• The low incidence suggests that extensive pre-operative cardiac evaluations may not be routinely required for all patients undergoing knee surgery.
• These findings support a more targeted approach to cardiac risk assessment in this patient population.