Atherosclerosis: Symptoms, Risk Factors, and When to Seek Medical Care

Atherosclerosis—the progressive buildup of plaque (cholesterol, fatty substances, cellular waste, calcium, and fibrin) inside artery walls—is the underlying cause of most cardiovascular disease, the leading global cause of death. Early detection and risk factor modification can dramatically alter disease trajectory.

Pathophysiology

The process begins with endothelial injury (from hypertension, smoking, diabetes, inflammation), allowing LDL cholesterol to penetrate the arterial intima. Oxidized LDL triggers inflammatory response, recruiting monocytes that become foam cells. Over decades, this forms a fibrous cap over a lipid core. Plaque rupture exposes thrombogenic material, causing acute thrombosis—heart attack or stroke.

Clinical Manifestations by Vascular Bed

• Coronary arteries: Angina (exertional chest pressure), dyspnea, silent ischemia (especially in diabetes)
• Carotid arteries: Transient ischemic attacks (TIAs), stroke, amaurosis fugax
• Peripheral arteries: Claudication (exertional leg pain relieved by rest), critical limb ischemia
• Aorta: Aneurysm formation, dissection
• Renal arteries: Refractory hypertension, flash pulmonary edema
• Mesenteric arteries: Postprandial abdominal pain, weight loss

Major Modifiable Risk Factors

• Dyslipidemia: Elevated LDL-C, low HDL-C, high triglycerides
• Hypertension: >130/80 mmHg per ACC/AHA guidelines
• Diabetes/insulin resistance: Accelerates endothelial dysfunction
• Smoking: Doubles CVD risk; cessation reduces risk by 50% within 1 year
• Obesity/physical inactivity: Central adiposity particularly atherogenic
• Diet: High saturated/trans fat, low fiber, excess sodium
• Psychosocial: Chronic stress, depression, social isolation

Non-Modifiable Risk Factors

• Age (men ≥45, women ≥55)
• Family history of premature CVD (male <55, female <65)
• Genetic disorders (familial hypercholesterolemia, lipoprotein(a) elevation)
• Male sex (premenopausal women partially protected by estrogen)
• Race/ethnicity (higher risk in South Asians, African Americans)

When to See a Doctor

Urgent evaluation needed for:

• New or worsening chest discomfort, especially with exertion
• Unexplained shortness of breath
• Sudden weakness, numbness, speech difficulty (possible TIA/stroke)
• Leg pain with walking that resolves at rest
• Erectile dysfunction (often precedes coronary symptoms by 3-5 years)

Routine screening recommended for:

• Adults 40-75: ASCVD risk assessment every 4-6 years (Pooled Cohort Equations)
• Adults 20-39 with risk factors: Lipid panel, BP, glucose
• Family history of premature CVD: Earlier, more intensive screening

Diagnostic Approach

• Lipid panel: LDL-C primary target; consider apoB, Lp(a) for risk refinement
• Imaging: Coronary artery calcium (CAC) scoring for risk reclassification in intermediate-risk adults; carotid IMT; CT angiography for symptomatic patients
• Functional testing: Stress testing (exercise ECG, stress echo, nuclear, cardiac MRI) for symptomatic evaluation

Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for evaluation of cardiovascular symptoms or risk factors. In a medical emergency, call emergency services immediately.