Myocardial bridge: Difference between revisions
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{{Infobox medical condition | |||
| name = Myocardial bridge | |||
| image = [[File:Myocardial_bridges.jpg]] | |||
| caption = Myocardial bridge as seen in a coronary angiogram | |||
| field = [[Cardiology]] | |||
| synonyms = | |||
| symptoms = Often asymptomatic, [[angina]], [[myocardial ischemia]] | |||
| complications = [[Myocardial infarction]], [[arrhythmia]] | |||
| onset = | |||
| duration = | |||
| types = | |||
| causes = Congenital | |||
| risks = | |||
| diagnosis = [[Coronary angiography]], [[intravascular ultrasound]] | |||
| differential = | |||
| prevention = | |||
| treatment = [[Beta blockers]], [[calcium channel blockers]], [[surgery]] | |||
| medication = | |||
| prognosis = Generally good if asymptomatic | |||
| frequency = 5-40% in the general population | |||
| deaths = | |||
}} | |||
{{Short description|A congenital heart anomaly involving the coronary arteries}} | {{Short description|A congenital heart anomaly involving the coronary arteries}} | ||
A '''myocardial bridge''' is a congenital anomaly of the coronary arteries where a segment of a coronary artery tunnels through the myocardium, the muscular wall of the heart, instead of resting on its surface. This condition is most commonly found in the [[left anterior descending artery]] (LAD), but can occur in other coronary arteries as well. | A '''myocardial bridge''' is a congenital anomaly of the coronary arteries where a segment of a coronary artery tunnels through the myocardium, the muscular wall of the heart, instead of resting on its surface. This condition is most commonly found in the [[left anterior descending artery]] (LAD), but can occur in other coronary arteries as well. | ||
== Anatomy and Physiology == | == Anatomy and Physiology == | ||
In a typical heart, the coronary arteries lie on the surface of the heart, supplying oxygen-rich blood to the heart muscle. In the case of a myocardial bridge, a portion of the artery dips into the myocardium and is "bridged" by heart muscle. During [[systole]], when the heart muscle contracts, the tunneled segment of the artery is compressed, which can potentially reduce blood flow. | In a typical heart, the coronary arteries lie on the surface of the heart, supplying oxygen-rich blood to the heart muscle. In the case of a myocardial bridge, a portion of the artery dips into the myocardium and is "bridged" by heart muscle. During [[systole]], when the heart muscle contracts, the tunneled segment of the artery is compressed, which can potentially reduce blood flow. | ||
== Clinical Significance == | == Clinical Significance == | ||
While many individuals with a myocardial bridge are asymptomatic, some may experience symptoms such as [[angina]], [[myocardial ischemia]], or even [[myocardial infarction]]. The compression of the artery during systole can lead to decreased blood flow, particularly during periods of increased heart rate or demand. | While many individuals with a myocardial bridge are asymptomatic, some may experience symptoms such as [[angina]], [[myocardial ischemia]], or even [[myocardial infarction]]. The compression of the artery during systole can lead to decreased blood flow, particularly during periods of increased heart rate or demand. | ||
=== Symptoms === | === Symptoms === | ||
Symptoms associated with myocardial bridges can include: | Symptoms associated with myocardial bridges can include: | ||
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* [[Dyspnea]] (shortness of breath) | * [[Dyspnea]] (shortness of breath) | ||
* [[Syncope]] (fainting) | * [[Syncope]] (fainting) | ||
=== Diagnosis === | === Diagnosis === | ||
Myocardial bridges are often diagnosed using imaging techniques such as: | Myocardial bridges are often diagnosed using imaging techniques such as: | ||
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* [[Intravascular ultrasound]] (IVUS) | * [[Intravascular ultrasound]] (IVUS) | ||
* [[Computed tomography angiography]] (CTA) | * [[Computed tomography angiography]] (CTA) | ||
== Treatment == | == Treatment == | ||
Treatment for myocardial bridges depends on the severity of symptoms. Options include: | Treatment for myocardial bridges depends on the severity of symptoms. Options include: | ||
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* Surgical intervention, such as [[myotomy]], in severe cases | * Surgical intervention, such as [[myotomy]], in severe cases | ||
* Lifestyle modifications to reduce cardiac stress | * Lifestyle modifications to reduce cardiac stress | ||
== See also == | |||
== | |||
* [[Coronary artery disease]] | * [[Coronary artery disease]] | ||
* [[Angina pectoris]] | * [[Angina pectoris]] | ||
* [[Myocardial infarction]] | * [[Myocardial infarction]] | ||
* [[Cardiac anatomy]] | * [[Cardiac anatomy]] | ||
[[Category:Congenital heart defects]] | [[Category:Congenital heart defects]] | ||
[[Category:Cardiology]] | [[Category:Cardiology]] | ||
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| Myocardial bridge | |
|---|---|
| |
| Synonyms | |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Often asymptomatic, angina, myocardial ischemia |
| Complications | Myocardial infarction, arrhythmia |
| Onset | |
| Duration | |
| Types | |
| Causes | Congenital |
| Risks | |
| Diagnosis | Coronary angiography, intravascular ultrasound |
| Differential diagnosis | |
| Prevention | |
| Treatment | Beta blockers, calcium channel blockers, surgery |
| Medication | |
| Prognosis | Generally good if asymptomatic |
| Frequency | 5-40% in the general population |
| Deaths | |
A myocardial bridge is a congenital anomaly of the coronary arteries where a segment of a coronary artery tunnels through the myocardium, the muscular wall of the heart, instead of resting on its surface. This condition is most commonly found in the left anterior descending artery (LAD), but can occur in other coronary arteries as well.
Anatomy and Physiology[edit]
In a typical heart, the coronary arteries lie on the surface of the heart, supplying oxygen-rich blood to the heart muscle. In the case of a myocardial bridge, a portion of the artery dips into the myocardium and is "bridged" by heart muscle. During systole, when the heart muscle contracts, the tunneled segment of the artery is compressed, which can potentially reduce blood flow.
Clinical Significance[edit]
While many individuals with a myocardial bridge are asymptomatic, some may experience symptoms such as angina, myocardial ischemia, or even myocardial infarction. The compression of the artery during systole can lead to decreased blood flow, particularly during periods of increased heart rate or demand.
Symptoms[edit]
Symptoms associated with myocardial bridges can include:
Diagnosis[edit]
Myocardial bridges are often diagnosed using imaging techniques such as:
Treatment[edit]
Treatment for myocardial bridges depends on the severity of symptoms. Options include:
- Beta-blockers or calcium channel blockers to reduce heart rate and myocardial contractility
- Surgical intervention, such as myotomy, in severe cases
- Lifestyle modifications to reduce cardiac stress
