Atrial Fibrillation (AF) Explained

A straight answer to the question most patients actually have: what’s wrong, what are my options, and what would you do in my position?

A short video on how AF is diagnosed, what drives treatment decisions, and where ablation fits in.

The Three Things I Weigh Up Before Anything Else

Every AF conversation I have starts in the same place, not with a drug or a procedure, but with three questions: are you safe, are you comfortable, and do you want your normal rhythm back. The order matters, and it’s rarely the same answer for two patients.

01

Your Stroke Risk Comes First

I first assess your stroke risk using the CHA₂DS₂-VASc score to determine whether a modern anticoagulant (NOAC) is the safest treatment.

02

Then, Keeping Your Heart Comfortable

A beta-blocker or calcium channel blocker helps control a fast or irregular heart rate, easing symptoms and reducing the risk of heart failure.

03

Finally, Deciding on Rhythm Control

If symptoms continue, we discuss restoring a normal heart rhythm with medication or catheter ablation when it's the most appropriate option.

Malcolm Afib 1

What Actually Happens During Ablation?

Almost all my patients go home the same day, occasionally with one night in. Most have sedation and local anaesthetic rather than a general anaesthetic. I guide catheters to the heart using X-ray and 3-D mapping, and a straightforward procedure takes one to two hours.

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Is Ablation My Only Option?

Not at all. Plenty of patients with mild symptoms, a healthy heart pump and low stroke risk need nothing beyond monitoring. Medication remains a genuine choice for many others, carrying risks broadly similar to those of ablation itself. Where rate control is genuinely difficult and ablation isn't appropriate, a pacemaker paired with AV-node ablation is sometimes the better route, though it does make someone dependent on the pacemaker for their heartbeat.

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Is Ablation Safe?

Yes, on the whole. A small number of patients have bruising or bleeding where the catheter enters the leg, and around 1 in 100 develop fluid around the heart, which usually just means a longer hospital stay to drain it. Stroke and injury to the oesophagus are now rare. I won't downplay it: death has occurred in roughly 1 in 2,000 procedures, though that's still a lower risk than an elective hip or knee replacement, at around 1 in 300.

Malcolm Afib 4

Can I Improve Things Myself?

Yes, and more than most people expect. Cutting back on alcohol, stopping smoking, and losing excess weight where it applies can all reduce how often AF strikes, and make any treatment you do have work better. For a minority, that's enough on its own; for most, it's what makes everything else stick.

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What Are My Chances of Success?

It depends which type of AF you have. If your AF comes and goes (paroxysmal), most patients are symptom-free after one procedure, and success from your point of view runs above 80% overall. If it's constant (persistent), success is above 70%, though a second procedure is sometimes needed, particularly if it's been present for years.

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What Happens to My Blood Thinners?

If you were already on one before the procedure, I'll generally keep you on it afterwards, at least for a while. A brief, symptomless flare-up of AF can still carry a stroke risk, and ablation doesn't fully reverse the underlying changes in the heart that caused the AF in the first place. This gets reviewed individually, not applied as a blanket rule.

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Does AF Ever Return After Treatment?

Often, yes, and it doesn't mean the procedure failed. Around half of patients treated for persistent AF, and around a third treated for paroxysmal AF, have a further episode. Usually that's just the treated tissue healing over, and a shorter follow-up procedure targeting that specific spot resolves it.

Worried about AF? Let’s talk it through.

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