Preoperative Heart Rate Variability and Baroreflex Sensitivity in ASO Patients During Various Sleep Stages

Preoperative Heart Rate Variability and Baroreflex Sensitivity in ASO Patients During Various Sleep Stages

The goal of this study is to evaluate the possible preoperative predictive value of altered heart rate variability (HRV) and baroreflex sensitivity in different sleep stages for postoperative adverse cardiac events (i.e. arrhythmia or myocardial ischemia needing hospitalization or medication, myocardial ischemia assessed by enzyme release, myocardial infarction, sudden cardiac death, stroke) in arteriosclerosis obliterans patients.

Inclusion Criteria:

• Age > 40 years
• ASO
• Elective vascular surgery patient (i.e. infra-inguinal bypass procedure)

Exclusion Criteria:

• Other than sinus rhythm
• Lack of co-operation
• Major surgery less than 3 months preoperatively
• Sleep apnoea
• Dialysis treatment
• CABG less than 3 years earlier