Chest tightness, palpitations, exhaustion — and then an angiography report that says, plainly, total occlusion. For many patients the sense of a blocked road becomes a sense that the road is closed altogether.

Chronic total occlusion (CTO) means a coronary artery that is 100% blocked and has stayed that way for more than three months. A review published in JACC: Cardiovascular Imaging in 2021 estimated that 15% to 25% of patients with coronary artery disease who undergo angiography have at least one CTO-affected vessel.

100%Blockage defining a total occlusion
>3 monthsDuration that makes it "chronic" rather than acute
15–25%Of angiography patients with at least one CTO vessel

For a long time these lesions have been regarded as the toughest fortress in interventional cardiology — and many patients are advised that open-heart bypass is the only realistic option.

At centres with rigorous evaluation and deep procedural experience, that verdict is being reconsidered. Whether the problem is a genuine chronic total occlusion, or a complex dissection left behind by a failed procedure elsewhere, a second intervention can often find a way through. Two patients treated at the Heart and Vascular Center at SinoUnited Health made that journey from a closed road to a reopened one.

1. The stent that would not open

Case one — a failed procedure, and a guidewire in the wrong placeReferred for surgery; treated percutaneously
The situationMs. Z underwent angioplasty for intolerable chest pain. The stent could not be expanded. After several days in hospital, her local team judged the case too complex and recommended transfer to cardiac surgery.
The findingProf. Lei Ge, a visiting specialist in interventional cardiology at SinoUnited, re-examined why the first attempt failed: the guidewire had entered the false lumen of the vessel.
The planNot an immediate second attempt — but letting the vessel rest until the dissection and haematoma caused by the guidewire had healed, then re-attempting.

The mechanism is worth understanding, because it explains why forcing a second attempt rarely works. A severely narrowed vessel is like a road with localised cave-ins. If the guidewire pierces the vessel wall and creates a false lumen, it is taking a wrong turn at the cave-in — and the result is a larger dissection and haematoma, which makes the true lumen even harder to find.

Waiting was the treatment. When the vessel had healed, the second intervention quickly recanalised the right coronary artery and implanted a stent successfully. Ms. Z went home as planned.

The decision to step back before stepping forward is the point of the case: with a complex dissection after a failed procedure, judging the right timing and the state of vascular healing matters more than attempting recanalisation again immediately.

2. Three-vessel disease at 68

Case two — a report that said bypass, and a culprit found elsewhereOne vessel treated; the other two left alone
The situationMr. Y, 68, woke one night with cardiac discomfort. Angiography showed disease in all three major vessels — the left anterior descending, circumflex and right coronary arteries. His local hospital concluded that stenting was not an option and bypass was the only route.
The findingProf. Ge reviewed the angiogram frame by frame for 40 minutes. The true culprit causing his symptoms was a chronic total occlusion of the right coronary artery; the narrowings on the left side had not reached a degree that would produce them.
The planTreat only the right coronary artery, then standardised medical therapy and risk-factor control — with a realistic expectation that the left-sided vessels would remain stable without intervention, and without bypass.

That conclusion substantially reduced the scope of the intervention, and for Mr. Y the change was as much psychological as clinical. He has been candid that he would rather have taken his chances than undergo open-heart surgery, and that the revised plan gave him considerable relief.

3. The procedure, and what followed

Mr. Y was treated on 1 June. He has spoken about Prof. Ge and the team reassuring him repeatedly during the procedure, and about blood flow in the right coronary artery being restored quickly.

Afterwards he still had mild chest tightness, and his anxiety had not fully settled. Prof. Ge visited the ward to explain, patiently, that the symptoms would improve gradually — and they did, with the patient back to normal shortly after.

What Mr. Y emphasises now is not the procedure but everything around it: following medical advice, taking medication consistently, controlling risk factors, and above all stopping smoking.

A note on reading case reports. These two outcomes reflect specific anatomies, specific timings and a specialist's judgement. They are not a promise that the same result is achievable in every patient, and no treatment decision should be made from an article alone. Patient details have been anonymised.

4. Opening the artery is the beginning, not the end

The logic behind SinoUnited's one-stop cardiac management is that a successful procedure is the start of treatment. Long-term control of blood pressure, blood lipids and blood glucose, together with lifestyle change, is what prevents progression and protects the prognosis that the procedure bought.

Both cases also illustrate the structure that makes a second opinion possible. The Heart and Vascular Center runs on a "general practitioner plus specialist" model, bringing together senior interventional cardiologists and cardiologists from top-tier tertiary hospitals in China, and using multidisciplinary resources with international standards and clinical pathways. Care runs the full cycle: prevention, diagnosis, medical and surgical treatment, and rehabilitation guidance.

For complex cases the centre also has access to devices that sit outside routine procurement, deployed where clinically appropriate:

Penetrating microcatheters Anchoring balloons Intravascular lithotripsy

Specialised clinics cover hypertension, chest pain, arrhythmia, syncope and pan-vascular disease — so the same centre that takes on a difficult CTO also handles the long-term chronic disease management that follows it.

5. What these two cases actually demonstrate

One patient had a dissection caused by a failed procedure elsewhere. The other had what looked like a dead end: three diseased vessels, and a recommendation for open-heart surgery.

In both, the change came from evaluation rather than from a new device — from knowing when to wait, and from reading a film closely enough to identify which vessel was actually causing the symptoms. That is the argument for a second look at complex coronary disease: when a CTO stops being a one-way street to bypass, the range of what is possible widens.

This article is health education for international patients and their families and does not replace an individual consultation, examination or diagnosis. Eligibility for percutaneous treatment of a chronic total occlusion depends on coronary anatomy, myocardial viability and overall clinical status, and is determined by an interventional cardiologist after full assessment.

About Prof. Lei Ge

Prof. Lei Ge, MD, PhD, is a chief physician and visiting specialist in interventional cardiology at SinoUnited Health, and Deputy Director of the Interventional Cardiology Center at Zhongshan Hospital, Fudan University. He is a member of the Interventional Cardiology Group of the Chinese Society of Cardiology, a training mentor at the National Health Commission's Coronary Intervention Training Base, and Deputy Director of the Coronary Intervention Group of the Shanghai Medical Association. He is a Fellow of the European Society of Cardiology (FESC), the Society for Cardiovascular Angiography and Interventions (FSCAI) and the Asia-Pacific Society of Interventional Cardiology (FAPSIC); Founding Chairman of the Asia-Pacific Chronic Total Occlusion Club (APCTO Club); and Secretary-General of the China Chronic Total Occlusion Club (CTOCC).

His practice centres on high-risk and complex coronary disease. He has performed live case demonstrations and given specialist lectures at major international meetings, including the Oriental Congress of Cardiology (OCC, Shanghai), China Interventional Therapeutics (CIT, Beijing), the European Society of Cardiology Congress, Transcatheter Cardiovascular Therapeutics (TCT, USA), the CTO Summit (USA), Complex Cardiovascular Therapeutics (CCT, Japan) and the CTO Club in Japan. He has served as principal investigator on the Shanghai Municipal Science and Technology Commission key project on fully degradable polylactic-acid rapamycin-eluting coronary stents, and on the National Key Research and Development Program project on fully degradable polymer stents.

He has contributed to Practical Internal Medicine, Practical Cardiology and Modern Cardiology, and has served as associate editor or editor-in-chief of six books on coronary CTO intervention, including Retrograde Interventional Therapy for Coronary Chronic Total Occlusion and the Handbook of Interventional Therapy for Coronary Chronic Total Occlusion. He has published in JACC, JAMA, the European Heart Journal, the American Journal of Cardiology and Heart, and twice received the Best Paper Award at the Angioplasty Summit in Korea and the Asia-Pacific TCT meeting. He was the first internationally to demonstrate the importance of final balloon kissing in the Crush technique for bifurcation lesions, and to analyse the efficacy and safety of drug-eluting stents in degenerated saphenous vein grafts; he was among the earliest to study drug-eluting stents in CTO lesions and to propose an electrophysiology mode for reducing radiation exposure during CTO PCI. He has been listed among Elsevier's Highly Cited Chinese Researchers for six consecutive years, with a single most-cited paper at 2,214 citations and 15,232 citations in total.

About the Heart and Vascular Center

The Heart and Vascular Center brings together senior interventional cardiology experts from tertiary A hospitals, electrophysiology specialists and cardiologists from China and abroad. Working on a "generalist plus specialist" model with international standards and pathways, it provides comprehensive assessment and one-stop cardiac management: prevention, diagnosis, medication, surgical treatment and rehabilitation guidance.

Specialised clinics cover hypertension, arrhythmia, chest pain, syncope and comprehensive vascular care, offering both tailored procedural treatment and long-term chronic disease management. See the Heart & Vascular service page.