Rotational Atherectomy

No — and the word “drill” is the reason this frightens people more than it should. A drill bores forward through whatever is in front of it. This burr is coated in diamond dust and works the way sandpaper does: it abrades hard, rigid material and skids harmlessly off soft, elastic material. Healthy artery wall is elastic, so it moves out of the way; calcium cannot move, so it is sanded. The tool is selective because of physics, not because of aim.

Into the bloodstream, where it is cleared. The particles are deliberately made smaller than a red blood cell — a few microns across — so they pass through the smallest vessels and are taken up by the body's scavenging cells in the liver and spleen. This is why the burr size and the technique matter: a burr that is too large, or held pressed against the calcium instead of pecking at it, makes too much debris too fast, and that is what can temporarily clog the small vessels downstream.

You are awake, and the artery itself has no sensation of touch. What people do feel during the runs is chest heaviness or pressure — the same quality as their angina, because blood flow down that artery is briefly reduced while the burr is working. It typically lasts as long as the run does, fifteen or twenty seconds, and eases between runs. Tell us when you feel it; it is useful information, not an interruption.

Because a balloon opens an artery by stretching it, and calcium does not stretch. Push a balloon harder against a rigid calcified ring and one of three things happens: nothing, or the balloon tears the softer wall beside the calcium, or the segment springs shut the moment the balloon comes down. Very high-pressure balloons and cutting balloons genuinely solve many calcified lesions, and they are tried first in most cases. Rotablation is for the calcium they cannot beat.

It makes it possible to place a properly expanded stent, and stent expansion is the thing most consistently linked to how a stent behaves years later. But I will not tell you the evidence goes further than it does. When rotablation was tested as a routine upgrade in patients whose arteries could have been treated without it, the stents did not do better — the ROTAXUS trial found slightly more late narrowing in the rotablation arm, not less. Against that, in the 200-patient PREPARE-CALC trial the strategy succeeded far more often when rotablation was used first, and at five years repeat procedures on the treated segment were less common. The honest summary is that rotablation is what lets a difficult artery be treated well, rather than a way of treating an easy artery better.

It carries some risks an ordinary angioplasty does not, and they are worth naming: a temporary slowing of blood flow after the runs, a slow heart rate or heart block during them — particularly in the right coronary artery — and, rarely, injury to the vessel wall or a burr that becomes stuck and needs specialist retrieval. Set against that, the alternative in these arteries is often an under-expanded stent or a procedure that cannot be completed at all. The comparison that matters is not rotablation versus a simple angioplasty; it is rotablation versus what happens to a rock-hard artery treated without it.

Almost certainly not. The rhythm disturbance that can occur during rotablation is temporary and belongs to the runs themselves — it comes from the debris and the brief interruption of flow, mostly in the right coronary artery, which supplies the heart's natural pacemaker in most people. Where that risk is expected, a temporary pacing wire may be placed through a vein beforehand and removed the same day. A permanent pacemaker is not part of this procedure.

Age by itself is not the deciding factor, and heavily calcified arteries are commonest precisely in older patients, in people with long-standing diabetes, and in those on dialysis. What we assess is your kidney function, your bleeding risk, whether you can take dual antiplatelet tablets, how strong the heart muscle is and what else you are living with. For many people in their seventies and eighties, a wrist procedure that avoids opening the chest is the gentler option, not the braver one.

Sometimes, genuinely. Heavy calcium often marks disease that has been present for a long time and involves several arteries, and that is the pattern in which surgery can serve some patients better — particularly with diabetes and reduced heart function. That decision belongs to a Heart Team discussion with a cardiac surgeon, not to whoever you happen to be sitting in front of. Where surgery is the better answer I will say so and arrange it.

The calcium in the segment we treated has been broken and partly removed, and it does not re-form there in the same way. But rotablation treats one blockage; it does not treat the process that made your arteries calcify. New disease can develop elsewhere, and a stent can narrow again over time. What decides your next ten years is the same unglamorous list as always — the statin, the blood pressure, the sugar, stopping smoking, and the walking.

Often you will not know for certain, and I would rather say that than pretend otherwise. Calcium visible on the angiogram or on a CT scan makes it likely, and intravascular imaging makes it much more predictable — which is why we image first when the artery allows it. But some lesions only declare themselves when a balloon refuses to cross. If there is a realistic chance rotablation will be needed, it is discussed and consented for before you go to the lab, so that nothing is decided about you while you are on the table without your knowing it was possible.

Rotablation adds the burr, its dedicated wire and the console time to your angioplasty bill, and calcified cases usually need more balloons and sometimes more than one stent. Most insurers cover angioplasty for a documented indication, but the individual consumables are where policies differ. We check your specific cover before anything is scheduled, and if pre-authorisation is required we start it early rather than on the morning of the procedure.