than resting on top of it. Typically, the arteries rest on top of the heart
muscle and feed blood down into smaller vessels that populate throughout the
myocardium. But if the muscle grows around one of the larger arteries, then a
myocardial bridge is formed. As the heart squeezes to pump blood, the muscle
exerts pressure across the bridge and constricts the artery. This defect is
present from birth. It can lead to uncomfortable, powerful heartbeats and
condition is diagnosed on a scaled based on what percentage of obstruction
occurs. If there is less than 50% blockage, then the condition is probably
benign. A result of at least 70% usually causes some pain. Small amounts of
myocardial bridging often are undetectable, as the blood usually flows through
the coronary while the heart is relaxing in diastole.
condition can cause complications such as vasospasm, angina
pectoris, arrhythmia, Vtach.
Additionally many patients express discomfort in specific positions, (i.e.
laying on the left side for a prolonged period of time)