Coronary Artery Disease: A Complete Guide for International Patients in Shanghai

Introduction

Coronary artery disease (CAD) — also known as coronary heart disease (CHD) or ischemic heart disease — is the leading cause of death worldwide and the most common form of heart disease. It is caused by the buildup of atherosclerotic plaques inside the coronary arteries — the blood vessels that supply oxygen-rich blood to the heart muscle. As these plaques accumulate and narrow the arteries, blood flow to the heart is reduced, potentially causing chest pain (angina), heart attack (myocardial infarction), heart failure, or sudden cardiac death.

In China, cardiovascular disease is the number one cause of death, accounting for approximately 40% of all deaths. The prevalence of CAD is rising rapidly, driven by increasing rates of hypertension, diabetes, obesity, smoking, and sedentary lifestyles. For international patients and expatriates in Shanghai, understanding CAD — its risk factors, symptoms, diagnosis, and treatment — is essential for protecting long-term heart health.

This guide provides a comprehensive overview of coronary artery disease, from prevention and early detection to acute management and long-term care, tailored to the needs of the international community in Shanghai.

Understanding Coronary Artery Disease

The coronary arteries are a network of blood vessels that wrap around the heart, delivering oxygen and nutrients to the heart muscle (myocardium). CAD develops when these arteries become narrowed or blocked by atherosclerosis — a process in which cholesterol, inflammatory cells, calcium, and fibrous tissue accumulate within the artery wall to form plaques.

Atherosclerosis is a lifelong, progressive process that begins in childhood and accelerates with cardiovascular risk factors. Plaques can be:

• Stable plaques: Gradually narrow the artery, causing predictable chest pain (stable angina) with exertion when oxygen demand exceeds supply.
• Vulnerable (unstable) plaques: Have a thin fibrous cap prone to rupture. When a plaque ruptures, a blood clot (thrombus) forms rapidly, potentially completely blocking the artery and causing a heart attack (acute myocardial infarction).

Spectrum of Coronary Artery Disease

• Stable angina: Predictable chest pain or discomfort triggered by exertion or stress, relieved by rest or nitrates within minutes. Caused by fixed coronary artery narrowing limiting blood flow during increased demand.
• Unstable angina: Chest pain occurring at rest, with minimal exertion, or with increasing frequency and severity. A medical emergency — part of the acute coronary syndrome (ACS) spectrum.
• Non-ST elevation myocardial infarction (NSTEMI): A heart attack without complete artery occlusion. Troponin is elevated. Requires urgent hospital evaluation and treatment.
• ST elevation myocardial infarction (STEMI): A heart attack caused by complete occlusion of a coronary artery. A life-threatening emergency requiring immediate reperfusion therapy (primary PCI) within 90 minutes of first medical contact.
• Silent ischemia: Reduced blood flow to the heart without symptoms. More common in diabetic patients and older adults. Detected on stress testing or imaging.
• Heart failure from CAD: Repeated ischemia or myocardial infarction damages heart muscle, leading to reduced pumping function (reduced ejection fraction heart failure).

Risk Factors

Non-Modifiable

• Age (men ≥45, women ≥55)
• Male sex (women’s risk increases significantly after menopause)
• Family history of premature CAD (first-degree male relative <55, female <65)
• Genetic conditions (familial hypercholesterolaemia)

Modifiable — Major

• Hypertension: The single most important modifiable risk factor for CAD and stroke
• Dyslipidaemia: Elevated LDL cholesterol, low HDL cholesterol, elevated triglycerides
• Diabetes mellitus: 2–4 times increased CAD risk; accelerates atherosclerosis
• Smoking: Doubles CAD risk; dramatically accelerates atherosclerosis
• Obesity: Particularly abdominal obesity
• Physical inactivity

Modifiable — Additional

• Chronic stress and psychological factors
• Obstructive sleep apnea
• Chronic kidney disease
• Inflammatory conditions (rheumatoid arthritis, lupus, psoriasis)
• Air pollution exposure — particularly relevant in Shanghai
• Excessive alcohol consumption
• Unhealthy diet (high saturated fat, trans fat, sodium; low fiber and vegetables)

Symptoms

Stable Angina

Classic angina presents as:

• Chest pain, pressure, tightness, squeezing, or heaviness — often described as “an elephant sitting on my chest”
• Located in the center or left side of the chest
• May radiate to the left arm, jaw, neck, shoulder, or back
• Triggered by physical exertion, emotional stress, cold weather, or heavy meals
• Relieved by rest within 5–10 minutes or by sublingual nitrates within 2–3 minutes
• Typically lasts 2–10 minutes

Atypical Presentations

Not all CAD presents with classic chest pain. Atypical symptoms are more common in women, diabetic patients, and older adults:

• Shortness of breath (dyspnea) — sometimes the only symptom
• Fatigue and exercise intolerance
• Jaw pain, neck pain, or left arm pain without chest pain
• Nausea, indigestion, or epigastric discomfort
• Dizziness or lightheadedness

Acute Coronary Syndrome (Heart Attack) — Emergency Symptoms

Symptoms of a heart attack may include:

• Severe chest pain or pressure lasting more than 20 minutes, not relieved by rest or nitrates
• Pain radiating to the arm, jaw, neck, or back
• Profuse sweating, nausea, or vomiting
• Shortness of breath
• Sense of impending doom
• Loss of consciousness

If you suspect a heart attack, call 120 immediately. Do not drive yourself to hospital. Time is muscle — every minute of delay increases heart muscle damage.

Diagnosis

Initial Assessment

• ECG (electrocardiogram): The first investigation in any patient with chest pain. Detects ST elevation (STEMI), ST depression, T-wave changes, and arrhythmias. Should be performed within 10 minutes of presentation.
• Cardiac troponin: A highly sensitive blood test for heart muscle damage. Elevated in NSTEMI and STEMI. High-sensitivity troponin (hs-cTn) allows rapid rule-in and rule-out of myocardial infarction within 1–3 hours. Available at all major Shanghai hospitals.
• Full blood count, metabolic panel, lipid profile, blood glucose, HbA1c

Non-Invasive Investigations for Stable CAD

• Exercise stress test (EST): Assesses for exercise-induced ischemia and arrhythmias. Useful for risk stratification in patients with stable symptoms.
• Stress echocardiography: Ultrasound of the heart during exercise or pharmacological stress (dobutamine). Detects wall motion abnormalities indicating ischemia. More sensitive and specific than EST alone.
• Myocardial perfusion imaging (MPI / nuclear stress test): Nuclear medicine scan assessing blood flow to the heart muscle at rest and during stress. Available at major Shanghai hospitals.
• Coronary CT angiography (CCTA): Non-invasive CT imaging of the coronary arteries. Excellent for ruling out significant CAD in low-to-intermediate risk patients. Also provides coronary calcium scoring (CAC) for risk stratification. Available at major Shanghai hospitals.
• Cardiac MRI: Detailed assessment of myocardial function, perfusion, and viability. Particularly useful for assessing the extent of prior myocardial infarction and hibernating myocardium.
• Coronary calcium score (CAC): A CT-based measure of calcified plaque burden in the coronary arteries. A powerful predictor of cardiovascular risk, useful for guiding statin therapy decisions in intermediate-risk patients.

Invasive Investigation

• Coronary angiography (cardiac catheterization): The gold standard for visualizing coronary artery anatomy and the degree of stenosis. A catheter is inserted (usually via the radial artery in the wrist) and contrast dye is injected into the coronary arteries under X-ray guidance. Allows simultaneous assessment and treatment (PCI) in the same procedure. Available at all major Shanghai cardiac centers.
• Fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR): Pressure wire measurements performed during coronary angiography to assess the functional significance of a coronary stenosis — guiding the decision to perform PCI. Available at leading Shanghai cardiac catheterization laboratories.
• Intravascular ultrasound (IVUS) and optical coherence tomography (OCT): Intracoronary imaging tools that provide detailed visualization of plaque morphology and guide optimal stent deployment. Available at leading Shanghai centers.

Treatment

Emergency Treatment: STEMI

STEMI is a life-threatening emergency. The priority is immediate restoration of blood flow to the blocked artery:

• Primary percutaneous coronary intervention (primary PCI): Emergency coronary angiography and stenting to open the blocked artery. The gold standard treatment for STEMI. Must be performed within 90 minutes of first medical contact (“door-to-balloon time”). Available 24/7 at major Shanghai cardiac centers including Zhongshan Hospital, Ruijin Hospital, and Shanghai Chest Hospital.
• Thrombolysis (fibrinolytic therapy): Clot-dissolving medication given intravenously when primary PCI is not available within 120 minutes. Less effective than primary PCI but life-saving when PCI is not accessible.

Treatment of Stable CAD

Lifestyle Modification

The foundation of CAD management:

• Heart-healthy diet: Mediterranean-style diet rich in vegetables, fruits, whole grains, legumes, fish, and olive oil; low in saturated fat, trans fat, and sodium
• Regular aerobic exercise: 150 minutes of moderate-intensity exercise per week
• Smoking cessation: The single most impactful lifestyle change
• Weight management
• Stress reduction and adequate sleep
• Limit alcohol

Medical Therapy

All patients with established CAD should receive optimal medical therapy (OMT):

• Antiplatelet therapy:
  • Aspirin (75–100 mg daily): Reduces platelet aggregation and prevents clot formation. Cornerstone of CAD secondary prevention.
  • P2Y12 inhibitors (clopidogrel, ticagrelor, prasugrel): Used in combination with aspirin (dual antiplatelet therapy, DAPT) after ACS or PCI for 6–12 months. Clopidogrel is widely available in China; ticagrelor is available at major centers.
• Statins: Reduce LDL cholesterol and stabilize atherosclerotic plaques. High-intensity statins (atorvastatin 40–80 mg, rosuvastatin 20–40 mg) are recommended for all patients with established CAD. Target LDL <1.4 mmol/L (<55 mg/dL) for very high-risk patients. Available in China.
• PCSK9 inhibitors (evolocumab, alirocumab): Injectable agents that dramatically lower LDL cholesterol. Used when statins alone are insufficient or not tolerated. Approved and available in China for high-risk patients.
• Beta-blockers: Reduce heart rate and myocardial oxygen demand. Essential after myocardial infarction and in patients with reduced ejection fraction heart failure.
• ACE inhibitors / ARBs: Reduce cardiovascular events in CAD patients, particularly those with diabetes, hypertension, or reduced ejection fraction.
• Nitrates: Sublingual nitrates (glyceryl trinitrate, GTN) for acute angina relief. Long-acting nitrates for angina prevention.
• Ranolazine, ivabradine, trimetazidine: Additional anti-anginal agents for patients with persistent symptoms despite standard therapy. Trimetazidine is widely used in China.
• SGLT2 inhibitors (empagliflozin, dapagliflozin): Originally developed for diabetes, now proven to reduce cardiovascular events and heart failure hospitalizations in CAD patients with or without diabetes. Available in China.
• GLP-1 receptor agonists (semaglutide, liraglutide): Reduce cardiovascular events in high-risk patients with diabetes and established CAD. Available in China.

Coronary Revascularization

When medical therapy is insufficient to control symptoms or when anatomy indicates high ischemic risk, revascularization restores blood flow to the heart:

• Percutaneous coronary intervention (PCI / coronary stenting): A catheter-based procedure in which a balloon is used to open the narrowed artery and a stent (a small metal mesh tube) is deployed to keep it open. Modern drug-eluting stents (DES) release medication to prevent re-narrowing (restenosis). PCI is performed under local anesthesia via the radial artery (wrist), typically requiring 1–2 days of hospitalization. Available at all major Shanghai cardiac catheterization laboratories.
• Coronary artery bypass grafting (CABG): Open-heart surgery in which blood vessels (typically the internal mammary artery and saphenous vein from the leg) are used to bypass blocked coronary arteries, restoring blood flow. Preferred over PCI for patients with left main disease, three-vessel disease, or diabetes with multivessel disease. Available at major Shanghai cardiac surgery centers including Zhongshan Hospital and Shanghai Chest Hospital.

Cardiac Rehabilitation

Cardiac rehabilitation (CR) is a structured program of exercise, education, and psychological support for patients after a heart attack, PCI, or CABG. It significantly reduces mortality, recurrent events, and hospitalizations, and improves quality of life. Despite strong evidence, CR remains underutilized in China. CMCS can assist with identifying and accessing cardiac rehabilitation programs in Shanghai.

Long-Term Management & Secondary Prevention

CAD is a lifelong condition requiring ongoing management:

• Strict adherence to optimal medical therapy — never stop medications without consulting your cardiologist
• Regular follow-up with a cardiologist: at least annually, or more frequently after ACS or revascularization
• Lipid monitoring: LDL cholesterol checked 4–8 weeks after starting or adjusting statin therapy, then annually
• Blood pressure and blood glucose monitoring
• Annual influenza vaccination (reduces cardiovascular events)
• Lifestyle optimization: ongoing commitment to diet, exercise, smoking cessation, and stress management
• Psychological health: depression is common after heart attack and significantly worsens outcomes. Screening and treatment are essential.

CAD in Women

CAD in women is frequently underdiagnosed and undertreated. Key differences include:

• Women more often present with atypical symptoms (fatigue, shortness of breath, nausea) rather than classic chest pain
• Women have a higher prevalence of non-obstructive CAD and microvascular disease (INOCA — ischemia with non-obstructive coronary arteries)
• Pregnancy complications (preeclampsia, gestational diabetes) are risk factors for future CAD
• Premature menopause increases CAD risk
• Women are less likely to be referred for stress testing, angiography, and cardiac rehabilitation

Managing CAD in Shanghai

• Emergency care: Call 120 immediately for any suspected heart attack. Major Shanghai hospitals with 24/7 primary PCI capability include Zhongshan Hospital, Ruijin Hospital, Shanghai Chest Hospital, and Xinhua Hospital.
• Medications: All essential CAD medications (aspirin, statins, beta-blockers, ACE inhibitors, clopidogrel, ticagrelor, PCSK9 inhibitors) are available in China. Bring a sufficient supply when relocating and carry a medication list with generic names.
• Dietary management: Chinese cuisine can be high in sodium and saturated fat. Request low-sodium, low-oil preparations when dining out. Cook at home using heart-healthy ingredients where possible.
• Air quality: PM2.5 air pollution is an independent cardiovascular risk factor. Use HEPA air purifiers at home, monitor the AQI daily, and limit outdoor exertion on high-pollution days.
• Specialist care: Cardiology departments at Zhongshan Hospital, Ruijin Hospital, and Shanghai Chest Hospital are nationally recognized centers of excellence with experienced interventional cardiologists and cardiac surgeons.

How China Medical Concierge Shanghai (CMCS) Can Help

Managing coronary artery disease in Shanghai requires consistent specialist care, medication management, and lifestyle support. CMCS provides:

• Cardiovascular risk assessment: Coordinating comprehensive cardiac check-ups including lipid panels, blood glucose, ECG, echocardiogram, coronary calcium scoring, and stress testing
• Specialist matching: Connecting you with leading cardiologists, interventional cardiologists, and cardiac surgeons at Shanghai’s top hospitals
• Emergency support: 24/7 assistance for cardiac emergencies, including hospital navigation and real-time communication with medical teams
• Appointment booking: Priority scheduling and full administrative coordination
• Medical interpretation: Professional interpreters for all consultations, catheterization procedures, and surgical discussions
• Medication access: Guidance on obtaining cardiac medications in China, including newer agents such as PCSK9 inhibitors, SGLT2 inhibitors, and ticagrelor
• Insurance coordination: Liaising with your international health insurer for cardiac investigations, PCI, CABG, and ongoing treatment
• Cardiac rehabilitation coordination: Identifying and facilitating access to cardiac rehabilitation programs in Shanghai
• Second opinion coordination: Arranging second opinions from leading specialists for complex cases

📩 Contact CMCS today for a free initial consultation — your heart health cannot wait.

Frequently Asked Questions

What is the difference between a heart attack and angina?
Angina is chest pain caused by reduced blood flow to the heart during exertion, which resolves with rest or nitrates. A heart attack (myocardial infarction) occurs when a coronary artery is completely or near-completely blocked, causing permanent heart muscle damage. Angina pain typically lasts 2–10 minutes; heart attack pain lasts more than 20 minutes and is not relieved by rest or nitrates. A heart attack is a medical emergency — call 120 immediately.

What should I do if I think I am having a heart attack in Shanghai?
Call 120 immediately. Chew an aspirin (300 mg) if available and not contraindicated. Do not drive yourself to hospital. Note the time symptoms began. CMCS clients can contact our 24/7 emergency line for immediate support and hospital navigation.

Is coronary stenting (PCI) available in Shanghai?
Yes. Coronary angiography and PCI with drug-eluting stents are widely available at Shanghai’s major hospitals. Leading centers including Zhongshan Hospital, Ruijin Hospital, and Shanghai Chest Hospital have experienced interventional cardiologists performing high volumes of PCI, including complex procedures.

Do I need bypass surgery or can I have a stent?
The choice between PCI and CABG depends on the number and location of blocked arteries, the presence of diabetes, heart function, and other factors. This decision should be made by a multidisciplinary heart team (cardiologist and cardiac surgeon) reviewing your coronary angiogram. CMCS can facilitate access to MDT review at leading Shanghai cardiac centers.

How low should my LDL cholesterol be?
For patients with established CAD (very high cardiovascular risk), current guidelines recommend an LDL target of less than 1.4 mmol/L (55 mg/dL) and at least a 50% reduction from baseline. If this target is not achieved with maximum tolerated statin therapy, a PCSK9 inhibitor should be added. CMCS can coordinate lipid management with a cardiologist.

Is CAD treatment covered by international health insurance?
Yes. CAD diagnosis and treatment — including stress testing, coronary angiography, PCI, CABG, and cardiac medications — are covered by most international health insurance plans. Coverage for newer agents (PCSK9 inhibitors, SGLT2 inhibitors) may vary. CMCS can verify your coverage and manage the authorization process.