Table 2.

Inclusion and exclusion criteria for the PREOP-ECHO trial

Inclusion criteria
• Aged 18 to 90 years • Plan to undergo elective non-cardiac surgery
Randomized controlled trial (Intermediate-risk group)	Prospective cohort study (high-risk group)
• Intermediate-risk surgery with less than three clinical risk factors	• Intermediate-risk surgery with three or more clinical risk factors or • High-risk surgery regardless of the number of clinical risk factors
Exclusion criteria
• Current symptoms or signs requiring transthoracic echocardiography • Poor functional capacity (< 4 METs) • Life expectancy less than 6 months • Emergent surgery • Low-risk surgery • Participants who underwent TTE within 3 months before study enrollment

TTE transthoracic echocardiography, MET metabolic equivalent of task