What Is Myocardial Bridging? Its Importance in Athletes and the Role of Coronary CT Angiography

Created: 11.12.2024 · Last Updated: 10.08.2026 · Category: Cardiology · Prepared by the Academic Hospital Web and Editorial Board.

Myocardial bridging is an anatomical condition in which a segment of a coronary artery travels through the heart muscle rather than remaining entirely on the surface of the heart.

In most people, myocardial bridging is found incidentally and causes no symptoms. In some individuals, however, compression of the tunneled coronary segment may affect blood flow, particularly when heart rate and myocardial oxygen demand increase during intense exercise. The clinical significance of a myocardial bridge therefore depends not only on its presence but also on its anatomy, the patient's symptoms and whether it produces myocardial ischemia or clinically significant arrhythmias.

What Is Myocardial Bridging?

Coronary arteries normally travel along the outer surface of the heart and supply oxygenated blood to the heart muscle. In myocardial bridging, a portion of a coronary artery passes through the myocardium. The intramuscular portion is called the tunneled coronary segment, while the overlying muscle is known as the myocardial bridge.

The left anterior descending coronary artery (LAD) is the vessel most commonly involved, although myocardial bridges can occur in other coronary arteries.

The reported prevalence varies considerably according to the imaging method used. Myocardial bridges are identified more frequently with coronary CT angiography and anatomical studies than with conventional coronary angiography, where bridges producing more obvious dynamic compression are more readily detected.

Important Information: Finding a myocardial bridge on imaging does not automatically mean that a person has a dangerous heart condition. Most myocardial bridges remain clinically silent and do not cause significant health problems.

What Are the Symptoms of Myocardial Bridging?

Many people with myocardial bridging have no symptoms. When symptoms occur, they may become more noticeable during exercise, tachycardia or other situations in which the heart requires more oxygen.

  • Chest pain or pressure during exercise
  • Shortness of breath
  • Palpitations
  • Unexplained reduction in exercise capacity
  • Dizziness
  • Fainting or near-fainting

These symptoms are not specific to myocardial bridging. Coronary artery disease, cardiomyopathies, arrhythmias and several other cardiovascular conditions may cause similar complaints. A cardiological assessment is therefore necessary to establish the underlying cause.

Why Is Myocardial Bridging Important in Athletes?

During exercise, the heart beats faster and requires more oxygen. At the same time, diastole — the relaxation phase during which a substantial portion of coronary blood flow occurs — becomes shorter. In selected myocardial bridges, dynamic compression may therefore become more relevant at high heart rates.

However, an athlete with a myocardial bridge is not automatically considered high risk. An incidental bridge in an asymptomatic athlete without inducible ischemia or significant ventricular arrhythmia is clinically different from a bridge associated with exertional chest pain, syncope, ischemia or complex arrhythmias.

Assessment should be individualized according to symptoms, exercise intensity, family history, ECG and echocardiographic findings, exercise testing and advanced cardiac imaging when appropriate.

Is Myocardial Bridging Associated With Sudden Cardiac Arrest?

Studies and case reports have described associations between myocardial bridging and myocardial ischemia, certain arrhythmias and, very rarely, serious cardiac events. Nevertheless, the majority of myocardial bridges have a benign clinical course, and the presence of a myocardial bridge alone does not mean that a person is at risk of sudden cardiac arrest.

Sudden cardiac arrest in athletes can result from many different cardiovascular conditions, including cardiomyopathies, electrical disorders, congenital coronary abnormalities and other structural heart diseases.

If a person with myocardial bridging experiences exertional chest pain, syncope, significant arrhythmia or has survived an unexplained cardiac arrest, a comprehensive investigation is required to determine whether the bridge is functionally significant and to exclude other causes.

Do not ignore chest pain, unexplained fainting or significant palpitations that occur during exercise.

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How Is Myocardial Bridging Diagnosed?

Diagnosis and risk assessment are not based on a single test. Depending on symptoms and clinical findings, several complementary investigations may be used.

  • Electrocardiography (ECG): Evaluates the electrical activity of the heart but does not directly visualize a myocardial bridge.
  • Echocardiography: Helps assess cardiac structure, function and accompanying abnormalities.
  • Exercise testing or stress imaging: May be used to assess for exercise-induced ischemia or arrhythmia.
  • Coronary CT angiography: Can directly demonstrate the intramyocardial course and anatomical characteristics of the coronary artery.
  • Invasive coronary angiography: Can demonstrate dynamic narrowing of the tunneled artery, particularly during systole.
  • Advanced invasive functional testing: In selected symptomatic patients, intravascular imaging and coronary pressure or flow measurements may help determine the hemodynamic significance of the bridge.

What Is the Role of Coronary CT Angiography?

Coronary CT angiography (CCTA) is an important non-invasive imaging technique for myocardial bridging because it can demonstrate the anatomical relationship between the coronary arteries and myocardium in high detail.

CCTA can help assess:

  • Which coronary artery is involved
  • The length of the tunneled segment
  • The depth of the artery within the myocardium
  • The anatomical relationship between the vessel and surrounding heart muscle
  • Associated coronary artery anomalies
  • Coronary plaques or stenoses
Anatomy and functional significance are not the same: CCTA can provide detailed anatomical information about a myocardial bridge, but identifying a bridge does not prove that it is reducing myocardial blood flow. Stress or functional testing may be required when clinically indicated.

How Is Coronary CT Angiography Performed?

During CCTA, iodinated contrast material is administered through a vein and thin-section CT images of the coronary arteries are acquired. An appropriate heart rate is important for image quality, and medications to control heart rate may be considered when clinically appropriate.

The resulting images can be reconstructed in multiple planes and in three dimensions to assess the course and anatomy of the coronary vessels.

How Does CCTA Differ From Invasive Coronary Angiography?

CCTA is a non-invasive anatomical imaging technique that can demonstrate the coronary artery wall, its relationship with surrounding tissues and the intramyocardial course of the vessel.

Invasive coronary angiography is performed using a catheter and may demonstrate the dynamic narrowing of a bridged coronary segment during cardiac contraction. Intravascular imaging or physiological measurements can be added when clinically necessary.

The two methods should therefore be viewed as complementary tools that answer different clinical questions, rather than as direct substitutes for one another.

Who May Need Coronary CT Angiography?

Coronary CT angiography is not a routine screening test for everyone who exercises or participates in sports. Its use should be determined by a physician after considering symptoms, cardiovascular risk and findings from other investigations.

CCTA may be considered in selected situations such as:

  • Unexplained exertional chest pain
  • Syncope or near-syncope during exercise
  • Suspected coronary artery anomaly
  • Abnormal findings on exercise testing or other cardiac investigations requiring further explanation
  • Need for detailed anatomical assessment of a known or suspected myocardial bridge
  • Selected patients in whom coronary artery disease and structural coronary abnormalities need to be assessed together

Because CCTA uses iodinated contrast material and X-rays, kidney function, previous contrast reactions, possible pregnancy and other relevant clinical factors should be assessed before the examination.

How Is Myocardial Bridging Treated?

Not every myocardial bridge requires treatment. Clinical follow-up is generally sufficient for people who have no symptoms and no evidence of ischemia or clinically significant arrhythmia.

In symptomatic patients, treatment is individualized according to symptom severity, evidence of ischemia, anatomical and functional characteristics of the bridge and accompanying cardiovascular conditions.

Medical Treatment

Beta blockers are commonly used as a first-line treatment in symptomatic myocardial bridging because reducing heart rate and contractility may decrease dynamic compression of the tunneled coronary segment. Calcium-channel blockers may be considered in selected patients depending on the clinical situation.

Medication selection and dosing should be individualized by a cardiologist.

Surgical Treatment

In selected patients with persistent significant symptoms and objectively demonstrated ischemia despite appropriate medical therapy, surgical unroofing or myotomy may be considered to release the coronary artery from the overlying myocardial tissue.

Surgical treatment should not be based solely on the anatomical presence of a bridge. Symptoms, objective evidence of ischemia and detailed anatomical and functional assessment should be considered together.

When Should You See a Doctor?

Cardiological evaluation is particularly appropriate if any of the following occur during sports or intense physical activity:

  • Chest pain or pressure
  • Unexplained shortness of breath
  • Significant or recurrent palpitations
  • Dizziness
  • Fainting or near-fainting
  • A marked and unexplained reduction in exercise capacity

Severe or new chest pain, loss of consciousness, severe shortness of breath or sudden collapse requires emergency assessment. In Türkiye, call 112 Emergency or go to the nearest emergency department.

Do Not Ignore Cardiac Symptoms During Exercise

Symptoms and cardiovascular findings can be evaluated together to determine whether exercise testing, coronary CT angiography or other advanced cardiac investigations are appropriate.

Frequently Asked Questions

What is myocardial bridging?
Myocardial bridging is an anatomical condition in which a segment of a coronary artery travels through the heart muscle rather than remaining entirely on the surface of the heart. The left anterior descending coronary artery is most commonly involved.
Is myocardial bridging dangerous?
Most myocardial bridges do not cause symptoms or significant health problems. Clinical significance depends on symptoms, anatomical characteristics and whether the bridge causes exercise-induced ischemia or clinically important arrhythmias.
Can a person with myocardial bridging exercise?
Many people can exercise. The decision should be individualized according to symptoms, exercise intensity and whether ischemia or clinically significant arrhythmia occurs during exercise. Symptomatic athletes should undergo cardiological evaluation.
Can coronary CT angiography detect myocardial bridging?
Yes. Coronary CT angiography can demonstrate the intramyocardial course of the coronary artery and provide detailed information about the length and depth of the bridge. Additional functional testing may be required to determine whether the bridge causes ischemia.
Should every athlete undergo coronary CT angiography?
No. Coronary CT angiography is not a routine screening test for every athlete. The need for CCTA should be determined by a physician after considering symptoms, cardiovascular risk and the results of other examinations.
Can myocardial bridging be treated?
Asymptomatic myocardial bridges usually do not require treatment. Medical treatment may be used when a bridge is symptomatic and functionally significant, while surgery may be considered in selected patients with persistent symptoms and documented ischemia despite appropriate medical therapy.
Academic Hospital note: Assessment of myocardial bridging should consider more than anatomy alone. Symptoms such as chest pain, fainting or palpitations, evidence of exercise-induced ischemia or arrhythmia, anatomical characteristics of the bridge and accompanying coronary artery disease should be evaluated together. You can book an appointment for cardiology and, when appropriate, advanced cardiac imaging assessment.

References

  1. Academic Hospital. 50 Yaş Altı Spor Yapan Bireylerde Ani Kalp Durmasında Koroner Arter Bridge ve Koroner BT Anjiyografi’nin Önemi
  2. Sternheim D, Power DA, Samtani R, Kini A, Fuster V, Sharma S. Myocardial Bridging: Diagnosis, Functional Assessment, and Management: JACC State-of-the-Art Review. J Am Coll Cardiol. 2021;78(22):2196-2212.
  3. Rovera C, Moretti C, Bisanti F, et al. Myocardial Bridging: Review on the Role of Coronary Computed Tomography Angiography. J Clin Med. 2023;12(18):5949.
  4. Kim JH, Baggish AL, Levine BD, et al. Clinical Considerations for Competitive Sports Participation for Athletes With Cardiovascular Abnormalities. Circulation. 2025;151:e716-e761.
  5. Pelliccia A, Sharma S, Gati S, et al. 2020 ESC Guidelines on Sports Cardiology and Exercise in Patients with Cardiovascular Disease. Eur Heart J. 2021;42:17-96.
  6. Petek BJ, Churchill TW, Moulson N, et al. Sudden Cardiac Death in National Collegiate Athletic Association Athletes: A 20-Year Study. Circulation. 2024;149(2):80-90.
  7. Alegria JR, Herrmann J, Holmes DR Jr, Lerman A, Rihal CS. Myocardial Bridging. Eur Heart J. 2005;26:1159-1168.
  8. Ripa C, Melatini MC, Olivieri F, Antonicelli R. Myocardial Bridging: A 'Forgotten' Cause of Acute Coronary Syndrome – A Case Report. Int J Angiol. 2007;16(3):115-118.