Management of Orthopnea Post-CABG

Diagnostic Evaluation

The American Heart Association recommends assessing for acute heart failure by examining jugular venous distention, presence of third heart sound, rales, and peripheral edema, as these signs indicate volume overload requiring urgent intervention 1, 2
Evaluate for graft failure or myocardial ischemia, as angina can present as dyspnea and orthopnea in the post-CABG period, although this fact is from a less preferred source, it is still relevant 3
Check for mechanical complications including ventricular septal rupture or mitral regurgitation from papillary muscle dysfunction, which carry high mortality 4, 5

Increased pulmonary capillary wedge pressure and systemic vascular resistance when lying flat can be managed with targeted therapy 6
Elevate head of bed 30 degrees (beach chair position) to prevent atelectasis formation and improve functional residual capacity, as recommended by the British Journal of Anaesthesia 7

The American College of Cardiology recommends never using NSAIDs or COX-2 inhibitors for pain management in post-CABG patients, as these increase cardiovascular events and mortality 5, 6, 8
Minimize opioids which can worsen respiratory depression and delay extubation; use multimodal analgesia with paracetamol as baseline (maximum 4000 mg/day) 6, 8

Ensure adequate analgesia through multimodal approach, as pain control is essential for mobilization and preventing complications, as recommended by the American Heart Association 1, 5, 6
Optimize nutritional support with controlled caloric intake (30 kcal/kg/day) to prevent depletion, although this fact is from a less preferred source, it is still relevant 3
Initiate cardiac rehabilitation when stable, as participation reduces depressive symptoms and improves functional capacity, although this fact is from a less preferred source, it is still relevant 9

If mechanical ventilation is required, use low tidal volume (6-8 ml/kg predicted body weight) with PEEP of 5 cm H2O minimum, as recommended by the British Journal of Anaesthesia 7
Individualize PEEP to avoid increases in driving pressure while maintaining adequate oxygenation, as recommended by the British Journal of Anaesthesia 7
Target early extubation (within 6 hours) in uncomplicated cases to facilitate mobilization and reduce pulmonary complications, as recommended by the American Heart Association 1, 2, 5