How to Explain SCAD to a Patient
Spontaneous coronary artery dissection (SCAD) is a tear in the wall of one of your heart arteries that happened on its own—not from a blockage caused by cholesterol buildup like typical heart attacks. 1
What Actually Happened in Your Heart
Think of your coronary artery as having layers, like a garden hose with an inner and outer wall. In SCAD, bleeding occurs between these layers (called an intramural hematoma), which creates pressure that squeezes the channel where blood normally flows. 1 This blocks oxygen-rich blood from reaching part of your heart muscle, causing a heart attack.
Key distinction to emphasize: This is NOT the typical "clogged artery" heart attack caused by cholesterol plaques. SCAD is a completely different disease mechanism. 1
Why This Happened to You
SCAD occurs primarily in women (over 90% of cases) and typically affects younger women without traditional risk factors like high cholesterol, diabetes, or smoking. 1
Common triggers and associations include:
- Emotional or physical stress (a major trigger)
- Fibromuscular dysplasia—a condition affecting blood vessel walls found in 25-86% of SCAD patients 1
- Pregnancy and the postpartum period (SCAD causes 14-43% of pregnancy-related heart attacks) 1
- Underlying blood vessel vulnerability that runs in families
Important caveat: This is NOT your fault. You didn't cause this by anything you did or didn't do. Your blood vessels have an underlying tendency toward this condition.
What Makes SCAD Different From Regular Heart Attacks
The management is fundamentally different because:
Your artery will likely heal itself: In 70-97% of cases, the dissection heals spontaneously without intervention 1
Stents can make things worse: The dissected artery wall is fragile and friable—placing stents can extend the tear or cause complications 2
Conservative treatment is preferred: Unless you're unstable or have very high-risk anatomy (like left main artery involvement), we manage this with medications and monitoring, not procedures 1, 2
Your Treatment Plan
Medications you'll take:
- Aspirin: Lifelong, to prevent clotting
- Beta-blocker: This is crucial—it reduces your risk of another SCAD by 61% (hazard ratio 0.39) 1
- Blood pressure control: Hypertension increases recurrence risk by 2.3-fold 1
- Possibly clopidogrel: For 3-12 months, though this is individualized based on bleeding risk 1
What we WON'T routinely prescribe:
- Statins (cholesterol medications)—because SCAD is not caused by cholesterol buildup 1
What to Expect Going Forward
Short-term (next 6 weeks):
- Your artery should heal on its own
- Repeat imaging may show complete resolution 3
- Gradual return to activities through cardiac rehabilitation 4
Long-term reality:
- Recurrence risk: 10-30% chance of another SCAD over your lifetime 5
- Persistent chest pain: Common even after healing—may be due to coronary vasospasm or microvascular dysfunction 6
- Psychological impact: Anxiety and depression are frequent; mental health support is essential 6
Critical Warning Signs—When to Seek Emergency Care
Return to the emergency department immediately if you experience:
- Chest pain lasting more than 20 minutes
- Chest pain with sweating, nausea, or shortness of breath
- Any symptoms similar to your original heart attack
Lifestyle Modifications
Avoid:
- Extreme physical exertion or isometric exercises (heavy weightlifting)
- Intense emotional stress when possible
- Valsalva maneuvers (straining)
Embrace:
- Gradual, supervised cardiac rehabilitation 4
- Stress management techniques
- Blood pressure monitoring at home
Screening for Associated Conditions
You'll need screening for fibromuscular dysplasia, which affects other arteries (brain, kidneys). This typically involves imaging of your neck and kidney arteries. 1
The Bottom Line
SCAD is a distinct disease requiring a completely different approach than typical heart attacks. Your prognosis is generally good with proper medical management, but vigilance for recurrence and addressing persistent symptoms through multidisciplinary care—including cardiac rehabilitation and psychological support—is essential for optimal recovery. 6, 7