Fractional Flow Reserve (FFR)
Not every narrowing seen on a coronary angiogram needs a stent. FFR shows whether a narrowing is genuinely reducing the blood supply to the heart muscle.
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Not every narrowing seen on a coronary angiogram needs a stent. FFR shows whether a narrowing is genuinely reducing the blood supply to the heart muscle.
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An angiogram shows the outline of the artery. Intravascular ultrasound (IVUS) shows its true diameter, the make-up of the plaque and the calcium, from the inside.
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A catheter with an ultrasound probe at its tip is placed inside the heart. It guides the procedure and lets most of them be done without a general anaesthetic.
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Heavy calcification makes it hard for a balloon and a stent to open fully. IVL cracks the hard layers of calcium in the artery wall with controlled shock waves.
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Coronary arteries that have been completely shut for months or even years can be opened again with specialised wires and microcatheters. The decision rests on how the artery is built.
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Severe narrowing of the aortic valve can be treated with a new valve delivered by catheter, without opening the chest. Who it suits is decided by the heart team.
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A leak at the mitral or tricuspid valve can be reduced by joining the edges of the leaflets with a catheter. The chest is not opened; the procedure goes in through the vein in the groin.
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A narrowed heart valve is widened with a balloon passed up from the groin. On the mitral valve this is the main treatment; on the aortic valve it is usually a step along the way.
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A hole between the atria (ASD) or the ventricles (VSD) can be closed with a double-disc device passed up from the groin. Suitability depends on the type of hole.
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The source of the rhythm disorder is located to the millimetre on a three-dimensional map of the heart built by computer, and energy is applied to that point.
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The electrical sources that set off atrial fibrillation are isolated by catheter. It is considered in suitable patients whose palpitations continue despite medication.
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A balloon catheter seated at the mouth of a pulmonary vein freezes it, creating the line of isolation in one go. It is widely used in atrial fibrillation.
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An ablation method that uses very short electrical pulses instead of heat or cold. Its defining feature is that it acts selectively on heart muscle cells.
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A capsule-shaped pacemaker that needs no lead and no pocket under the skin is placed directly inside the heart, through the vein in the groin.
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Where the ventricles contract out of step in heart failure, a third lead paces the left ventricle as well, so that they contract together.
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A device that watches for a life-threatening fast rhythm and stops it, first with pacing and, if that is not enough, with a shock. It serves a different purpose from an ordinary pacemaker.
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A narrowing in the leg arteries can be opened with a balloon and a stent, through the groin. Different methods are used above and below the knee.
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