Define coronary artery circulation. Coronary circulation : definition of Coronary circulation and synonyms of Coronary circulation (English)

Coronary arterial dominance

define coronary artery circulation

In older patients, stress thallium studies may be used to assess myocardial ischaemia before and after treatment. However, in the less frequently encountered right coronary artery to coronary sinus drainage, the fistula vessel may be large and very tortuous. Two-dimensional and colour Doppler echocardiography are helpful in demonstrating dilation of the affected coronary artery and on colour flow mapping may show the site of drainage, but it is difficult to define the detailed anatomy of the fistula with this technique. In the older patients, symptoms may include dyspnoea or angina of effort and occasionally arrhythmias. Pathophysiology When the fistula drains to the right side of the heart, the volume load is increased to the right heart as well as to the pulmonary vascular bed, the left atrium and the left ventricle. The vessels that remove the deoxygenated blood from the heart muscle are known as cardiac veins.

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Coronary

define coronary artery circulation

Transcatheter closure of coronary artery fistulae using the Amplatzer duct occluder. If the fistula drains to the right atrium with a proximally arising feeding artery, it tends to be considerably dilated but less tortuous Figure and Figure. Clinical features Coronary arterial fistulas are usually asymptomatic in the first two decades, especially when they are haemodynamically small. Spontaneous rupture of the aneurysmal fistula causing haemopericardium has also been reported. Congenital coronary artery fistulae: six new cases with a collective review. Variations Four percent of people have a third, the posterior coronary artery. These junctions are called anastomoses.

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Coronary Artery

define coronary artery circulation

If the fistula does not close with growth of the patient, then the older the patient, the easier the catheter procedure becomes technically. The main complication is inadvertent embolisation of the devices, but even then it is possible to retrieve the devices with goose-neck snares. These arteries, when healthy, are capable of autoregulation to maintain coronary blood flow at levels appropriate to the needs of the. Approximately 70% of the general population are right-dominant, 20% are co-dominant, and 10% are left-dominant. The technique of catheter closure allows further arterial feeding vessels to be discovered by selective coronary angiography at the end of the procedure and if such multiple feeding vessels are noted, these can also be occluded.

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Coronary Artery

define coronary artery circulation

There is a stenosis at the entry point into the right atrium. Symptoms and signs The majority of the patients are asymptomatic. Some patients with large shunts may present with signs of congestive cardiac failure and angina, usually at the two extremes of life. The choice of the equipment and the technique depends on the morphology of the fisulas. Coronary flow During contraction of the myocardium , the subendocardial coronary vessels the vessels that enter the myocardium are compressed due to the high intraventricular pressures. Because of this, blood flow in the subendocardium stops. Many types of equipment should be available in the catheterisation laboratory for closing the fistulas.

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Coronary circulation : definition of Coronary circulation and synonyms of Coronary circulation (English)

define coronary artery circulation

The more proximal the feeding artery originates from the main coronary artery, the more dilated it tends to be. In rare cases, a person will have one coronary artery that runs around the root of the aorta. Whichever technique of catheter closure is used, the occlusion should be at a precise point. Selective coronary angiography of both the coronary arteries is needed to confirm the diagnosis, the detailed anatomy and the presence of multiple fistulas. Initial diagnostic catheterisation is needed to assess the haemodynamic significance of the fistula and to provide detailed anatomy of the fistula, in particular, the size, the origin, the course, presence of any stenoses and the drainage site. Its exact incidence is unknown. For example if the route to the target vessel is tortuous, then superfloppy guidewires combined with 3 Fr Tracker or Ferret catheters are recommended.

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Coronary arterial dominance

define coronary artery circulation

The treatment options for coronary arterial fistulas include surgery or catheter closure. This contributes to the filling difficulties of the coronary arteries. In these patients with multiple bends in the feeding artery, it may be preferable to use controlled-release platinum micro-coils of 0. Coronary cameral fistulae following heart transplantation. The majority of these fistulas are congenital in origin although they may occasionally be detected after cardiac surgery. The vessels that deliver oxygen-rich blood to the myocardium are known as coronary.

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