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PubMed This is a summary of 22 peer-reviewed journal articles Updated
Cardiology

Restoring Blood Flow: Procedures and Surgeries

At a Glance

Blood-flow restoration procedures for atherosclerosis may be used for a heart emergency, ongoing symptoms despite medical treatment, proven loss of blood flow, or high-risk artery blockages. Stents, bypass surgery, and carotid or leg procedures each have different benefits, risks, and recovery times.

When medical therapy and lifestyle changes are not enough to manage your atherosclerosis, or if you experience a medical emergency, your care team may recommend revascularization. This is the medical term for restoring blood flow to a part of the body that isn’t getting enough [1]. However, revascularization is not an automatic requirement for every severe narrowing in stable disease; it is generally used for acute coronary syndromes, symptoms that persist despite medical therapy, demonstrable ischemia, or prognostically important anatomy. Furthermore, these procedures are powerful tools, but they are not a “cure”—you must continue your medications afterward to manage the underlying disease [2].

Treating the Heart: PCI vs. CABG

If the arteries supplying your heart are severely blocked and meet criteria for intervention, there are two primary ways to restore flow. Because these decisions are complex, they are often made by a Heart Team—a multidisciplinary group including a cardiologist, an interventionalist, and a heart surgeon [3][4].

Percutaneous Coronary Intervention (PCI)

In this procedure, a doctor threads a thin tube (catheter) to the site of the blockage and uses a tiny balloon to open the artery. They then place a stent—a small mesh tube that scaffolds the artery to keep it open [5].

  • Benefits: Faster recovery, no large incision, and a lower risk of stroke immediately after the procedure [6][7].
  • Trade-offs: There is a higher chance that the artery will narrow again (restenosis) or that you will need a repeat procedure in the future, particularly if you have complex disease [8][9].

Coronary Artery Bypass Grafting (CABG)

Commonly called “bypass surgery,” a surgeon uses a healthy blood vessel from another part of your body (like your leg or chest) to create a new path for blood to flow around the blockage [1].

  • Benefits: CABG is often more “durable,” meaning it can last longer. It has survival and repeat-procedure advantages in particular settings, such as suitable patients with diabetes or complex multivessel disease [8][10][11].
  • Trade-offs: It is a major surgery requiring a longer hospital stay and recovery time, and carries different perioperative risks [6].

Making the Coronary Decision

The choice depends heavily on your specific anatomy (often measured by a SYNTAX score, which calculates the complexity of your blockages), symptoms, heart function, surgical risk, diabetes status, and personal preferences [12][13][14][15]. Complete revascularization (treating all significant blockages) is often the goal.

Treating the Neck: Carotid Interventions

The carotid arteries in your neck supply blood to your brain. If these become severely narrowed, it can lead to a stroke [16]. Interventions here are heavily based on whether you are symptomatic (e.g., a recent TIA) or asymptomatic.

Carotid Endarterectomy (CEA)

This is a surgical procedure where the surgeon opens the artery and physically removes the plaque [16].

  • Purpose: The benefit is strongest in carefully selected symptomatic patients with qualifying stenosis; intervention for asymptomatic disease is much more selective [17].
  • Risks: While effective, the surgery carries a risk of local bleeding (hematoma), temporary or permanent cranial-nerve injury (affecting speech or swallowing), perioperative stroke, and myocardial infarction [18][19].

Carotid Artery Stenting (CAS)

Like PCI in the heart, this involves placing a stent in the neck artery without a large incision [16].

  • Considerations: CAS is not simply an alternative for any severe narrowing. It is an option for younger patients or those whose anatomy/surgical risk makes CEA difficult [16]. Age and anatomy affect its stroke risk, and it typically carries a higher risk of stroke during or immediately after the procedure compared to surgery [20][21].

Treating Peripheral Artery Disease (PAD)

If you have Peripheral Artery Disease (PAD) causing leg pain (claudication), management typically begins with supervised or structured walking therapy, foot-care precautions, and symptom-directed medication. Elective revascularization (via stents or surgical bypass) is considered if symptoms are severely limiting despite therapy, or urgently if tissue changes or worsening pain indicate acute ischemia [22].

Common questions in this guide

When is a procedure used to restore blood flow in atherosclerosis?
Blood-flow restoration may be considered during a heart emergency, when symptoms continue despite medical treatment, when testing shows reduced blood flow, or when the artery pattern creates an important long-term risk. It is not automatically needed for every severe but stable narrowing. For leg artery disease, a procedure may be used for severely limiting symptoms despite walking therapy or urgently for tissue changes or worsening pain.
What is the difference between PCI and CABG for coronary artery disease?
PCI uses a catheter, balloon, and stent to open a narrowed heart artery, so recovery is usually faster and there is no large incision. CABG uses a healthy blood vessel to route blood around the blockage; it is major surgery with a longer recovery but can be more durable in selected people, including some with diabetes or complex disease in several heart arteries. A Heart Team weighs the blockage pattern, symptoms, heart function, surgical risk, and preferences.
Which is better for severe carotid narrowing: surgery or a stent?
Carotid endarterectomy has the clearest benefit for carefully selected people with recent symptoms and qualifying narrowing. Carotid stenting may be considered for some younger patients or when anatomy or surgical risk makes surgery less suitable, but it often has a higher risk of stroke during or soon after treatment. Age, anatomy, symptoms, and overall surgical risk guide the decision.
How is peripheral artery disease treated before considering a procedure?
Treatment usually begins with structured or supervised walking, foot-care precautions, and symptom-directed medication. Stents or surgical bypass may be considered when leg pain severely limits activity despite these measures, or urgently when tissue changes or worsening pain suggest an acute loss of blood flow.
Do I need medicines after a stent or bypass for atherosclerosis?
Yes. A blood-flow restoration procedure improves circulation to a treated area but does not cure the underlying artery disease, so prescribed medicines, lifestyle measures, and follow-up remain important after treatment.
How does diabetes affect the choice between PCI and CABG?
Diabetes can make bypass surgery more favorable in some people, particularly those with complex disease in several heart arteries, but it is not the only deciding factor. The Heart Team also weighs the blockage pattern, symptoms, heart function, surgical risk, and your preferences.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Based on my SYNTAX score and anatomy, what are the chances that PCI could achieve 'complete revascularization' for me?
  2. 2.If we choose CABG over PCI, how does that change my long-term risk of needing a second procedure or having a heart attack?
  3. 3.For my carotid disease, what is this facility's average stroke and complication rate for CEA versus stenting?
  4. 4.How does having diabetes affect the 'Heart Team's' recommendation for my specific case?
  5. 5.Which specific specialists—such as a surgeon, interventionalist, and cardiologist—were involved in reviewing my imaging and creating this plan?

Questions For You

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References

References (22)
  1. 1

    2022 Joint ESC/EACTS review of the 2018 guideline recommendations on the revascularization of left main coronary artery disease in patients at low surgical risk and anatomy suitable for PCI or CABG.

    Byrne RA, Fremes S, Capodanno D, et al.

    European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2023; (64(2)) doi:10.1093/ejcts/ezad286.

    PMID: 37632766
  2. 2

    Trends of lipid-lowering drug utilization, treatment intensity and LDL-C target attainment in adults with diabetes and non-dialysis chronic kidney disease in Hong Kong.

    Huang Y, Yang A, Shi M, et al.

    The Lancet regional health. Western Pacific 2025; (63()):101696 doi:10.1016/j.lanwpc.2025.101696.

    PMID: 41080409
  3. 3

    Implementation and consistency of Heart Team decision-making in complex coronary revascularisation.

    Pavlidis AN, Perera D, Karamasis GV, et al.

    International journal of cardiology 2016; (206()):37-41.

    PMID: 26774827
  4. 4

    [The heart team in planning and performance of revascularization : ESC guidelines versus clinical routine].

    Sinning JM, Welz A, Nickenig G

    Herz 2016; (41(7)):562-565 doi:10.1007/s00059-016-4477-6.

    PMID: 27596003
  5. 5

    Comparison of Stenting Versus Bypass Surgery According to the Completeness of Revascularization in Severe Coronary Artery Disease: Patient-Level Pooled Analysis of the SYNTAX, PRECOMBAT, and BEST Trials.

    Ahn JM, Park DW, Lee CW, et al.

    JACC. Cardiovascular interventions 2017; (10(14)):1415-1424 doi:10.1016/j.jcin.2017.04.037.

    PMID: 28728654
  6. 6

    Stroke Rates Following Surgical Versus Percutaneous Coronary Revascularization.

    Head SJ, Milojevic M, Daemen J, et al.

    Journal of the American College of Cardiology 2018; (72(4)):386-398 doi:10.1016/j.jacc.2018.04.071.

    PMID: 30025574
  7. 7

    Five-Year Outcomes after PCI or CABG for Left Main Coronary Disease.

    Stone GW, Kappetein AP, Sabik JF, et al.

    The New England journal of medicine 2019; (381(19)):1820-1830 doi:10.1056/NEJMoa1909406.

    PMID: 31562798
  8. 8

    Coronary Artery Bypass Surgery Versus Drug-Eluting Stent Implantation for Left Main or Multivessel Coronary Artery Disease: A Meta-Analysis of Individual Patient Data.

    Lee CW, Ahn JM, Cavalcante R, et al.

    JACC. Cardiovascular interventions 2016; (9(24)):2481-2489 doi:10.1016/j.jcin.2016.10.008.

    PMID: 28007199
  9. 9

    Percutaneous coronary intervention versus coronary artery bypass graft for left main coronary artery disease: A meta-analysis.

    Gallo M, Blitzer D, Laforgia PL, et al.

    The Journal of thoracic and cardiovascular surgery 2022; (163(1)):94-105.e15 doi:10.1016/j.jtcvs.2020.04.010.

    PMID: 32499076
  10. 10

    Everolimus-Eluting Stents or Bypass Surgery for Multivessel Coronary Artery Disease: Extended Follow-Up Outcomes of Multicenter Randomized Controlled BEST Trial.

    Ahn JM, Kang DY, Yun SC, et al.

    Circulation 2022; (146(21)):1581-1590 doi:10.1161/CIRCULATIONAHA.122.062188.

    PMID: 36121700
  11. 11

    SYNTAX Score in Patients With Diabetes Undergoing Coronary Revascularization in the FREEDOM Trial.

    Esper RB, Farkouh ME, Ribeiro EE, et al.

    Journal of the American College of Cardiology 2018; (72(23 Pt A)):2826-2837 doi:10.1016/j.jacc.2018.09.046.

    PMID: 30522646
  12. 12

    Second asymptomatic carotid surgery trial (ACST-2): a randomised comparison of carotid artery stenting versus carotid endarterectomy.

    Halliday A, Bulbulia R, Bonati LH, et al.

    Lancet (London, England) 2021; (398(10305)):1065-1073 doi:10.1016/S0140-6736(21)01910-3.

    PMID: 34469763
  13. 13

    Outcomes Following Percutaneous Coronary Intervention in Patients With Multivessel Disease Who Were Recommended for But Declined Coronary Artery Bypass Graft Surgery.

    Koshy AN, Stone GW, Sartori S, et al.

    Journal of the American Heart Association 2024; (13(11)):e033931 doi:10.1161/JAHA.123.033931.

    PMID: 38818962
  14. 14

    Percutaneous coronary intervention with drug-eluting stents versus coronary artery bypass grafting in left main coronary artery disease: an individual patient data meta-analysis.

    Sabatine MS, Bergmark BA, Murphy SA, et al.

    Lancet (London, England) 2021; (398(10318)):2247-2257 doi:10.1016/S0140-6736(21)02334-5.

    PMID: 34793745
  15. 15

    Multidisciplinary Heart Team Approach for Complex Coronary Artery Disease: Single Center Clinical Presentation.

    Young MN, Kolte D, Cadigan ME, et al.

    Journal of the American Heart Association 2020; (9(8)):e014738 doi:10.1161/JAHA.119.014738.

    PMID: 32308096
  16. 16

    European Stroke Organisation guideline on endarterectomy and stenting for carotid artery stenosis.

    Bonati LH, Kakkos S, Berkefeld J, et al.

    European stroke journal 2021; (6(2)):I-XLVII doi:10.1177/23969873211012121.

    PMID: 34414302
  17. 17

    Society for Vascular Surgery clinical practice guidelines for management of extracranial cerebrovascular disease.

    AbuRahma AF, Avgerinos ED, Chang RW, et al.

    Journal of vascular surgery 2022; (75(1S)):4S-22S doi:10.1016/j.jvs.2021.04.073.

    PMID: 34153348
  18. 18

    Carotid Artery Stenting Versus Endarterectomy for Stroke Prevention: A Meta-Analysis of Clinical Trials.

    Sardar P, Chatterjee S, Aronow HD, et al.

    Journal of the American College of Cardiology 2017; (69(18)):2266-2275 doi:10.1016/j.jacc.2017.02.053.

    PMID: 28473130
  19. 19

    Efficacy and safety of stenting for elderly patients with severe and symptomatic carotid artery stenosis: a critical meta-analysis of randomized controlled trials.

    Ouyang YA, Jiang Y, Yu M, et al.

    Clinical interventions in aging 2015; (10()):1733-42 doi:10.2147/CIA.S91721.

    PMID: 26604720
  20. 20

    Diagnosis, Treatment and Follow-up in Extracranial Carotid Stenosis.

    Eckstein HH, Kühnl A, Berkefeld J, et al.

    Deutsches Arzteblatt international 2020; (117(47)):801-807.

    PMID: 33549156
  21. 21

    Long-term outcomes of stenting and endarterectomy for symptomatic carotid stenosis: a preplanned pooled analysis of individual patient data.

    Brott TG, Calvet D, Howard G, et al.

    The Lancet. Neurology 2019; (18(4)):348-356 doi:10.1016/S1474-4422(19)30028-6.

    PMID: 30738706
  22. 22

    Medical Management and Revascularization for Asymptomatic Carotid Stenosis.

    Brott TG, Howard G, Lal BK, et al.

    The New England journal of medicine 2026; (394(3)):219-231 doi:10.1056/NEJMoa2508800.

    PMID: 41269206

This page explains blood-flow restoration procedures for atherosclerosis for educational purposes only and does not constitute medical advice. Discuss the best procedure, risks, and need for ongoing medication with your cardiology or vascular care team.

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