Spontaneous Coronary Artery Dissection: A Leading Cause of Heart Attacks in Women

Spontaneous Coronary Artery Dissection: A Leading Cause of Heart Attacks in Women

Spontaneous coronary artery dissection (SCAD) is emerging as one of the most important yet often overlooked causes of heart attacks in women. While traditional heart attacks are mainly linked to cholesterol-rich plaque buildup, SCAD occurs when a tear forms in the wall of a coronary artery. This tear disrupts blood flow to the heart muscle, triggering an acute myocardial infarction. Most cases occur in young or middle-aged women who would otherwise be considered healthy and at low cardiovascular risk. New clinical research is revealing that SCAD is a distinct disease that requires its own diagnostic and treatment approach.

What Is Spontaneous Coronary Artery Dissection?

Spontaneous coronary artery dissection, or SCAD, is a condition where an inner layer of a coronary artery separates from the outer layer. Blood enters the newly created space, forming a false channel that compresses the true artery lumen. This constriction limits blood flow, causing oxygen deprivation to the heart muscle and leading to myocardial infarction.

SCAD is increasingly identified through advanced imaging such as intravascular ultrasound or optical coherence tomography. These tools allow cardiologists to visualize the dissection plane directly, improving diagnostic accuracy.

Who Is Most at Risk for SCAD Heart Attack?

Unlike conventional coronary artery disease, which is driven by plaque buildup, SCAD frequently affects younger women between 30 and 55. A large proportion of cases are reported in women without common risk factors such as smoking or diabetes. Data from the Serbian SCAD Registry showed that 85% of patients diagnosed with SCAD were women, with a mean age of 47.5 years.

Pregnancy Related SCAD and Postpartum Connection

Pregnancy related SCAD occurs in roughly 5 to 10% of cases. Hormonal changes during pregnancy can weaken arterial walls, contributing to vascular fragility and increasing susceptibility to dissection. Most pregnancy related SCAD events happen in the postpartum period, when hormone levels fluctuate sharply and cardiac output remains elevated.

Common Triggers and Risk Factors

Several physical and emotional stressors have been linked to SCAD events. The Serbian registry showed that mental stress preceded 38% of SCAD cases, while physical exertion was noted in more than 10%. Additional risk factors include fibromuscular dysplasia, connective tissue disorders such as Ehlers-Danlos or Marfan syndrome, and long-term high blood pressure.

Fibromuscular Dysplasia and SCAD

Fibromuscular dysplasia (FMD) is a vascular condition that causes abnormal cell growth in the walls of arteries. This can lead to areas of narrowing, bulging, or tearing. Studies have found a high prevalence of FMD among SCAD patients, suggesting an underlying predisposition to vascular fragility. Still, some autopsy studies have questioned this association, showing that not all patients with SCAD exhibit evidence of FMD in the coronary arteries.

What Are the Symptoms of SCAD in Women?

Recognizing heart attack symptoms in women is crucial for timely diagnosis and treatment. Many women experiencing a SCAD heart attack may initially believe their discomfort is due to anxiety, fatigue, or indigestion. However, the warning signs can be severe and life-threatening.

Typical Symptoms Include:

• Sudden chest pain or pressure that may radiate to the arm, neck, back, or jaw.

• Shortness of breath or difficulty catching breath.

• Unexplained extreme fatigue.

• Lightheadedness or dizziness.

• Nausea or vomiting.

• Rapid heartbeat or palpitations.
  

Women experiencing these symptoms should seek emergency care immediately. Early intervention can reduce complications and improve recovery outcomes.

The Difference Between SCAD and Atherosclerotic Heart Attacks

Traditional heart attacks generally occur when a cholesterol plaque ruptures, causing a blood clot to form inside the artery. In contrast, SCAD is caused by a tear within the artery wall itself. Because of this difference, the usual interventional approach involving stent implantation may not always be appropriate.

Stent Implantation and SCAD: New Evidence

According to recent registry data presented at the 2026 European Association of Percutaneous Cardiovascular Interventions Summit, stent implantation was not beneficial in most SCAD patients. In fact, those who underwent stent placement were more likely to experience adverse cardiac events later. The fragile nature of the dissected vessel makes it susceptible to further damage during stent deployment. Physicians now prefer conservative management through medication and close observation wherever possible.

Classification and Diagnosis of Coronary Artery Dissection

Coronary artery dissection classification is based on angiographic patterns observed during coronary imaging. The most common types include:

• Type 1: Classic appearance with a visible dissection flap.

• Type 2: Long, smooth narrowing due to intramural hematoma.

• Type 3: Focal narrowing resembling plaque disease.

These distinctions guide treatment planning and help cardiologists avoid unnecessary interventions.

For diagnostic documentation, SCAD is coded under the coronary artery dissection ICD-10 category (I25.42), which helps clinicians and researchers track cases for statistical analysis and research development.

How Is SCAD Managed After a Heart Attack?

The management of SCAD depends on the severity of the dissection and the patient’s stability. In stable cases, a conservative “watch and wait” approach is favored because spontaneous healing occurs in a large proportion of patients.

Medical Management

• Beta-blockers: Reduce heart rate and lower arterial wall stress.

• Antiplatelet agents: Prevent clot formation.

• Blood pressure control: Minimize vessel strain.

• Psychological support: Addresses anxiety and post-traumatic stress that often follow SCAD events.

Observational studies suggest that more than 60% of patients show full arterial healing within 30 days. Regular follow-up imaging ensures restoration of normal blood flow.

Cardiac Rehabilitation

Cardiac rehabilitation helps patients gradually rebuild physical strength, manage stress, and regain confidence. Since SCAD often strikes younger women, rehabilitation programs must also provide tailored emotional and lifestyle support.

 

When Should Stent Implantation Be Avoided in SCAD?

Stent implantation should generally be avoided unless there is ongoing ischemia or complete vessel occlusion. Because dissected arteries can be fragile and prone to further tearing, stents may extend the dissection or obstruct smaller vessels. Conservative therapy paired with imaging-guided follow-up offers a safer long-term outcome for most patients.

Why Does SCAD Sometimes Recur?

SCAD recurrence remains a clinical concern. Some patients may experience recurrent dissections months or years after the first episode. Research suggests possible triggers include persistent vascular inflammation or underlying connective tissue disorders. Genetic factors such as PHACTR1/EDN1 polymorphisms have been proposed as potential contributors. Continued monitoring and lifestyle management are essential to reduce recurrence risk.

What Ongoing SCAD Research Is Revealing

The European Society of Cardiology has launched a large multinational registry to capture data on SCAD presentation, treatment, and outcomes. Combined with earlier findings from the Serbian registry, this research aims to standardize care protocols and close gaps in global SCAD awareness.

These initiatives are also exploring how genetic testing, imaging technologies, and hormonal evaluations can improve detection and prevention.

Preventive Strategies and Awareness

Although SCAD cannot always be predicted or prevented, certain lifestyle and risk-reduction strategies may help:

• Control high blood pressure through diet, exercise, and medication.

• Avoid extreme physical strain and emotional stress.

• Participate in regular cardiac checkups after pregnancy or long-term hormone therapy.

• Seek medical care at the first sign of chest discomfort.

Awareness among women and healthcare providers remains the key factor for improving survival and recovery outcomes.

Conclusion

Spontaneous coronary artery dissection is increasingly recognized as one of the main causes of heart attacks in women under 50. Unlike traditional atherosclerotic disease, SCAD often occurs without warning in young and otherwise healthy individuals. New global research confirms that conservative management strategies and long-term rehabilitation lead to better recovery than routine stent implantation in many cases. With enhanced awareness of symptoms, improved diagnostic imaging, and dedicated registries, the medical community is taking crucial steps to understand and manage this complex condition. For women experiencing unexplained chest pain or discomfort, immediate evaluation remains the most effective way to save heart muscle, preserve health, and prevent recurrence of this unpredictable yet treatable condition.