Chest Pain Not at the Insertion Site After CABG: Causes and Management

Common Causes of Non-Insertion Site Chest Pain Post-CABG

The American College of Cardiology notes that musculoskeletal pain is the most frequent etiology of chest pain away from the surgical site after coronary artery bypass graft (CABG) surgery, with post-sternotomy pain syndrome affecting between 7% and 66% of patients 1, 2
Women experience a higher prevalence of post-sternotomy pain within the first 3 months (51.4% vs 31.3% in men), though this difference disappears after 3 months 2
Graft failure due to technical issues, thrombosis, graft intimal hyperplasia, or vasospasm can cause ischemic chest pain, with saphenous vein graft failure rates of 10-20% at 1 year and approximately 50% by 10 years 1, 2
Internal mammary artery grafts have better longevity, with 90-95% patency at 10-15 years 1, 2
Pericarditis, pulmonary embolism, and sternal wound infection are other potential causes of non-insertion site chest pain post-CABG 2

The American College of Cardiology recommends stress imaging to evaluate for myocardial ischemia in patients with non-ACS presentation 1, 2
Coronary CT angiography (CCTA) is effective for evaluating graft stenosis or occlusion, with 99% sensitivity and specificity for detecting complete graft occlusions 2, 3
Invasive coronary angiography (ICA) is recommended for indeterminate or nondiagnostic stress test results, and for patients with high-risk features such as new resting left ventricular systolic dysfunction or significant ST-segment depression 1, 2, 3

The American Heart Association recommends emergency CABG after failed PCI in the presence of ongoing ischemia or threatened occlusion with substantial myocardium at risk 4, 5
For patients with resuscitated sudden cardiac death or sustained ventricular tachycardia thought to be caused by significant CAD and resultant myocardial ischemia, CABG is recommended 4