Management of Coronary Artery Disease with Multiple Stenoses

Assessment of Current Coronary Status

The American College of Cardiology recommends that patients with coronary lesions, including LAD with 40% stenosis, previous LCx proximal angioplasty, previous stent in first obtuse marginal proximal segment, and previous stent in proximal RCA, undergo further evaluation 1
The patient's 75% mid RCA stenosis and 85% in-stent restenosis would be categorized as CAD-RADS 4A/S, indicating severe stenosis with stent presence, according to the CAD-RADS classification 1, 3
Severe RCA stenosis (70-99%) is considered hemodynamically significant and requires intervention, with a recommendation for invasive coronary angiography with potential intervention 4

The 75% mid RCA stenosis meets criteria for significant obstructive disease requiring intervention, with percutaneous coronary intervention (PCI) with stent placement indicated 4
The 85% in-stent restenosis is classified as severe and warrants treatment, with consideration of functional assessment (FFR) if there is any question about hemodynamic significance 3, 1
The LAD 40% stenosis is considered non-obstructive and does not require intervention at this time, but should be monitored for progression of non-obstructive disease 2, 3

For the 75% mid RCA stenosis, percutaneous coronary intervention (PCI) with stent placement is indicated, with consideration of functional assessment (FFR) if there is any question about hemodynamic significance 4
For the management of coronary artery disease, aggressive medical therapy including high-intensity statins, dual antiplatelet therapy, and risk factor modification is recommended 5, 1

After intervention, regular follow-up is essential to monitor for progression of non-obstructive disease, recurrent in-stent restenosis, and recurrent symptoms, with consideration of non-invasive functional testing (stress test) at 6-12 months post-intervention 1, 4, 5
Close monitoring after intervention is necessary due to the risk of recurrent restenosis, with factors associated with recurrent restenosis including lesion and stent length, severity of initial stenosis, and acute neointimal recoil after intervention 5