A prospective cohort pilot study of non-cardiac patients to determine the feasibility of recruiting 150 patients to undergo postoperative continuous hemodynamic monitoring for up to 3 days.

Patient will start wearing the Philips' hemodynamic and ECG monitor in the Post Anaesthesia Care Unit (PACU). This device will continuously measure heart rate, pulse oxymetry, and ST-segments. The device will measure blood pressure every hour from 7 am to 10 pm and every 2 hours from 10 pm to 7 am.

Patients will have postoperative Troponin I monitoring and telephone follow-up at 30 days postop.

Inclusion Criteria: We will enroll patients aged 45 years or older undergoing noncardiac surgery who fulfilled 2 or more of the following risk factors:

• History of coronary artery disease
• History of stroke or transient ischemic attack (TIA)
• History of hypertension
• History of diabetes
• History of peripheral vascular disease
• History of congestive heart failure
• Preoperative creatinine > 175 umol/L
• A planned admission for ≥48 hours
• Patients receiving a general or regional anesthetic

Exclusion Criteria:

• Patients unable to provide informed consent.
• Patients who undergo procedure performed under infiltrative or topical anesthesia.
• Patients previously enrolled in the HI-VISION Study.
• Patients who refuse 30-day follow-up.

Patients aged 45 or greater who present for noncardiac surgery with 2 or more risk factors for heart disease and will be receiving a general or spinal anesthesia with an anticipated length of stay of 3 days or more.