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Table 1 Clinical risk stratification for nonsurgical procedures

From: Perioperative risk stratification in non cardiac surgery: role of pharmacological stress echocardiography

High (>5%)
   Emergent major operations
   Aortic and other major vascular
   Peripheral vascular
   Anticipated prolonged surgical procedures associated with large fluid shifts and/or blood loss
Intermediate (<5%)
   Carotid endarterectomy
   Head and neck
   Intraperitoneal and intrathoracic
Low (<1%)
   Endoscopic procedures
   Superficial procedure
  1. Modified from [3]