Professor Sun Lizhong: Complex Aortic Disease and Sun’s Procedure Specialist
Professor Sun Lizhong is a senior cardiovascular surgeon, professor, doctoral supervisor, founder of the Aortic Surgery Center at Beijing Anzhen Hospital, and a leading specialist in aortic dissection and complex aortic reconstruction. He is known internationally for developing the Sun classification and Sun’s procedure for extensive aortic disease.
Clinical and Academic Focus
- acute type A aortic dissection;
- aortic arch and thoracoabdominal aneurysm;
- Sun’s procedure and frozen elephant trunk reconstruction;
- chronic residual aortic dissection;
- repeat and staged aortic surgery;
- genetic and connective-tissue aortopathy;
- pregnancy-associated aortic disease;
- adult congenital and valve disease involving the aorta; and
- second opinions before complex aortic repair.
Acute Type A Aortic Dissection
Acute type A aortic dissection occurs when a tear in the inner wall of the ascending aorta allows blood to separate the layers of the vessel. It can cause rupture, cardiac tamponade, severe aortic-valve leakage, stroke, heart attack, or loss of blood flow to major organs.
Sudden severe chest, back, or abdominal pain, fainting, neurological symptoms, or shock requires immediate local emergency care. Suspected type A dissection usually requires urgent surgical evaluation and international travel must not delay treatment.
Sun’s Procedure
Sun’s procedure combines total aortic-arch replacement with implantation of a stented elephant-trunk graft into the descending aorta. It is designed for selected patients with extensive type A dissection, arch disease, or complex aneurysm.
The technique can treat the arch, stabilize the proximal descending aorta, and create a platform for later intervention when needed. It is major surgery with risks including bleeding, stroke, spinal-cord injury, organ failure, infection, and death.
Branch-First and Cerebral Protection
Complex arch surgery requires careful protection of the brain and other organs while blood flow through the aorta is interrupted or redirected. Branch-first strategies aim to reconstruct or perfuse arch vessels early during selected procedures.
The exact cannulation, cooling, perfusion, and reconstruction plan depends on anatomy, urgency, malperfusion, previous surgery, and the treating center’s experience.
Aortic Aneurysms
An aortic aneurysm is abnormal enlargement of the vessel. Treatment depends on size, growth, symptoms, location, body size, valve anatomy, family history, genetic condition, and surgical risk.
Options can include surveillance, open surgery, endovascular repair, or a hybrid approach. Diameter alone should not be interpreted without the full clinical context.
Residual and Chronic Dissection
After repair of an acute dissection, the remaining aorta may stay dissected and enlarge over time. Lifelong imaging and blood-pressure management are essential.
Later treatment may involve open thoracoabdominal repair, endovascular stent grafting, branch-vessel procedures, or a staged hybrid strategy.
Genetic Aortic Disease
Marfan syndrome, Loeys-Dietz syndrome, vascular Ehlers-Danlos syndrome, bicuspid aortic valve, and familial thoracic aortic disease can increase dissection risk at younger ages or smaller diameters.
Evaluation may include genetic counseling, family imaging, full-aorta surveillance, and individualized thresholds for preventive surgery.
Pregnancy and Aortic Disease
Pregnancy increases cardiovascular stress and can raise the risk of aortic enlargement or dissection in susceptible patients. Women with known aortopathy should ideally receive pre-pregnancy counseling from an experienced multidisciplinary team.
Management may involve serial imaging, strict blood-pressure control, delivery planning, and preventive surgery before pregnancy in selected cases.
Who May Consider a Consultation?
- stable patients recovering after acute type A dissection repair;
- patients with aortic arch or thoracoabdominal aneurysm;
- patients with residual or enlarging chronic dissection;
- patients advised to undergo Sun’s procedure or staged aortic repair;
- patients needing repeat surgery after previous aortic repair;
- patients with Marfan syndrome or another inherited aortopathy;
- women with aortic disease planning pregnancy; or
- patients seeking a second opinion before complex open or hybrid surgery.
Medical Records to Prepare
- a precise symptom, diagnosis, and treatment timeline;
- contrast-enhanced CT angiography of the entire aorta in original DICOM format;
- echocardiography, cardiac MRI, and catheter angiography when available;
- all previous aortic and cardiac operative reports;
- graft, stent, valve, and implant information;
- brain, kidney, intestinal, and limb-perfusion assessments;
- genetic reports and a three-generation family history;
- blood-pressure records and complete medication history;
- pregnancy and obstetric records when relevant; and
- a clear list of treatment and surveillance questions.
Planning an International Consultation
New severe chest or back pain, fainting, stroke symptoms, a cold limb, severe abdominal pain, or shock requires immediate local emergency care.
Stable patients should confirm whether full-aorta imaging and previous operative records can be reviewed. Remote medical-record review requires physician authorization. Final surgical eligibility and strategy require complete in-person assessment.
How CMCS Can Assist
CMCS – China Medical Concierge Shanghai is an independent medical concierge and health management company, not a hospital. We assist international patients with organizing and translating aortic records, identifying an appropriate specialist, requesting appointment availability, arranging interpretation, and planning medical travel in China.
Access to Professor Sun, remote review, Sun’s procedure, open surgery, or hybrid treatment is subject to doctor and hospital approval. CMCS does not guarantee appointments, surgical eligibility, device availability, or clinical outcomes.
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Important Note
Doctor titles, hospital roles, procedures, devices, and appointment arrangements may change. This profile is based on the supplied verified research document and is for general information only. It does not replace assessment by a qualified aortic surgery team.
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