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Cardiology · London

Subcutaneous ICD (S-ICD) implant - private in London.

A defibrillator that sits entirely under the skin. Generator in the mid-axillary line, a single lead tunnelled to the breastbone, and nothing inside the heart or veins. The Boston Scientific EMBLEM S-ICD, implanted by a consultant electrophysiologist in a proper theatre.

A stethoscope on a clinical desk

Indicative pricing

What a private S-ICD implant costs in London.

Indicative all-inclusive ranges across UK theatres: device, hospital stay, electrophysiologist and anaesthetist. NHS funding applies where NICE and BHRS criteria are met.

In short

£22,000-£38,000, home the next morning.

Procedure Indicative range
Subcutaneous ICD (Boston EMBLEM S-ICD) implant £22,000-£38,000
S-ICD screening ECG (three-vector template test) £150-£300
EP consultation and SCD-risk assessment £250-£450
Device check and remote monitoring set-up £150-£300
Generator change at end of life £16,000-£22,000
Transvenous ICD (single or dual chamber) £20,000-£32,000

Prices vary by centre, by which electrophysiologist does the case, and by length of stay.

The problem

The right device, the right patient, the right advice.

The S-ICD is a superb device for the right patient - and the wrong device for the wrong one. The mistakes we see are S-ICDs implanted in patients who needed anti-tachycardia pacing, or transvenous ICDs implanted in patients who should have kept their veins clear. We fix that before you commit.

  • Young, and facing decades of device therapy?

    No leads in the veins means no lead extractions later in life. That matters more with every decade you look ahead.

  • Worried about lead infection?

    Prior endocarditis, dialysis or immunosuppression - the S-ICD keeps all hardware outside the heart and vessels.

  • Want it done properly?

    A named electrophysiologist, a BHRS-accredited theatre, a proper screening ECG, and honest advice on whether an S-ICD or a transvenous device fits your risk.

When it helps

When a subcutaneous ICD is the right step.

The situations we see most, plus the red flag that means an emergency rather than an appointment. The S-ICD only shocks - if you also need pacing, we say so.

  • Hereditary cardiomyopathy

    HCM, ARVC, long-QT (LQTS) or Brugada syndrome with a primary-prevention indication - the S-ICD spares the venous system for a lifetime of devices.

  • Survived sudden cardiac arrest

    Secondary-prevention ICD after a VF/VT arrest with no need for anti-tachycardia pacing or bradycardia backup.

  • Young patients

    Children, adolescents and young adults facing decades of device therapy - no leads in the veins, no lead extractions later in life.

  • Limited or difficult venous access

    Congenital heart disease, prior subclavian occlusion, mechanical tricuspid valve, or upper-limb DVT - the veins to the heart are left completely untouched.

  • Previous endocarditis or lead infection

    A prior transvenous lead infection or bloodstream infection - the S-ICD keeps all hardware outside the heart and vessels.

  • Dialysis patients

    End-stage renal disease on haemodialysis - preserving central veins for fistulas and avoiding lead-related infection risk.

  • Immunosuppression

    Transplant recipients or long-term immunosuppression, where transvenous lead infection carries a much higher morbidity.

  • Red flag: aborted cardiac arrest

    A witnessed collapse with a shockable rhythm is an emergency - same-day A&E, not a clinic booking. Once stable, the ICD route can be discussed properly.

Device options

S-ICD compared with the alternatives.

The S-ICD keeps every wire outside the heart and vessels - MRI-conditional, no lead extraction to worry about, no endocarditis on a lead. What you give up is anti-tachycardia pacing and bradycardia backup. Here is when each device wins.

  • Boston Scientific EMBLEM MRI S-ICD

    The only subcutaneous ICD on the market. Generator sits in the mid-axillary line, a single lead tunnelled to a parasternal position. Delivers up to 80J for VF/VT. MRI-conditional at 1.5T.

  • Transvenous single-chamber ICD (VVI)

    Standard ICD with one lead in the right ventricle - still the right answer where anti-tachycardia pacing or bradycardia backup is needed.

  • Transvenous dual-chamber ICD (DDD)

    RA and RV leads for shock therapy plus dual-chamber pacing - preferred where sinus node dysfunction or AV block coexist with an ICD indication.

  • CRT-D (biventricular defibrillator)

    Cardiac resynchronisation plus shock therapy for heart failure with a wide QRS and low ejection fraction. An S-ICD cannot deliver CRT.

  • Leadless pacemaker (Micra / Aveir)

    Sometimes paired with an S-ICD in select cases to add bradycardia support without adding transvenous leads. Discussed only where the indication is clear.

  • Wearable cardioverter defibrillator (LifeVest)

    A short-term external option while a decision is being made, or during a period of temporary risk after a large MI or new cardiomyopathy diagnosis.

  • Extravascular ICD (Medtronic EV-ICD)

    A newer substernal lead alternative - not yet routine in UK private practice. We flag it where relevant but do not recommend it lightly.

  • No ICD - medical management

    Where the risk of sudden cardiac death is low, or where the patient prefers not to proceed. We support informed refusal as readily as informed consent.

Safety and recovery

What to expect afterwards - honestly.

An S-ICD trades one set of risks for another. You avoid every complication that involves a lead inside the heart or veins. What remains is a pocket, a tunnelled lead, and a larger generator than a transvenous ICD.

  • General anaesthesia or deep sedation

    Your choice, discussed at consent. GA is more common for S-ICD than for transvenous devices because of the tunnelling. An anaesthetist is present throughout.

  • No leads in the heart or veins

    The single defibrillator lead sits entirely under the skin, parasternally. No risk of lead perforation, lead-tip endocarditis, tricuspid regurgitation, or subclavian vein occlusion.

  • Larger device than a transvenous ICD

    The generator is bigger and sits in the mid-axillary line rather than below the collarbone. A slim patient will feel and see it more; body-mapping at planning helps site it well.

  • No anti-tachycardia pacing, no bradycardia backup

    The S-ICD only shocks. It cannot terminate monomorphic VT with painless pacing bursts, and it cannot pace for slow rhythms - if you need either, a transvenous ICD or CRT-D is the right answer.

  • Battery life 5-7 years

    Shorter than a transvenous ICD (typically 8-10 years). Remote monitoring flags depletion months in advance and generator changes are straightforward.

  • Pocket and wound care

    A mid-axillary pocket needs 4 weeks to settle. Sling for 1-2 weeks, no heavy lifting for 4 weeks, wound checks at 2 and 6 weeks. Infection risk is lower than transvenous but not zero.

  • MRI-conditional at 1.5T

    EMBLEM S-ICD is MRI-conditional under specific scanning protocols. Scans are booked at MRI-capable centres with device programming immediately before and after.

  • What it feels like when it shocks

    Patients describe an appropriate shock as a hard, sudden thump to the chest - unpleasant but brief. Inappropriate shocks (T-wave oversensing) have been reduced by the current SMART Pass algorithm.

  • Red flags

    Fever, wound leaking, swelling that grows, chest pain, breathlessness or blackouts after implant - call the clinic or A&E the same day.

Reading your implant note

Your implant note in four parts. Read the last one first.

Whichever device is implanted, the note the electrophysiologist sends you keeps to the same shape.

A UK consultant electrophysiologist reviewing a patient's S-ICD implant notes

A quiet reminder

Device programming language is precise and can read coldly - ask your care team to explain anything that is unclear.

Ask your care team to explain anything that is unclear.

  1. 01 Header

    Indication and device chosen

    Why the ICD was implanted - primary or secondary prevention, cardiomyopathy type, LVEF - and confirmation that the EMBLEM S-ICD was implanted.

  2. 02 Technique

    Pocket, lead position and DFT testing

    Two-incision or three-incision technique, generator pocket in the mid-axillary line, parasternal lead position, and defibrillation threshold testing (or PRAETORIAN score) at the end.

  3. 03 Findings

    Sensing vector and complications

    Which sensing vector was chosen (primary, secondary, alternate), any concerns about T-wave oversensing, and any wound, tunnelling or anaesthetic issue.

  4. 04 Impression

    Programming, follow-up and remote monitoring

    Read this first: shock zones (conditional and standard), SMART Pass on/off, when to return for the 6-week check, and the remote monitoring plan for the years ahead.

Recognised by major UK insurers

BupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealix

Cover for S-ICD implantation varies by insurer - usually funded where NICE and BHRS criteria are met and the indication is clearly documented.

Frequently asked

Everything we get asked about the subcutaneous ICD.

Quick answers on MRI, battery life, sport, driving, insurance and what a shock feels like.

  • Is an S-ICD MRI safe?

    The Boston Scientific EMBLEM S-ICD is MRI-conditional at 1.5 Tesla under a specific scanning protocol. Scans are booked at MRI-capable centres with the device programmed to an MRI-safe mode immediately before, and re-programmed afterwards. Certain body regions and 3T scanners still have restrictions - the EP team will confirm before any scan.

  • How long does the S-ICD battery last?

    Typically 5 to 7 years, shorter than a transvenous ICD (which lasts 8 to 10 years) because the shocks are delivered from outside the heart and need more energy. Remote monitoring flags depletion months in advance and the generator change is a shorter, single-pocket procedure.

  • Can I still swim and play sport?

    Yes. Swimming, running, cycling, tennis, golf and most gym work resume at 6 to 8 weeks. Contact sports (rugby, boxing, martial arts) are usually avoided because of the risk of direct trauma to the device. Some athletes actually prefer the S-ICD over a transvenous ICD because there is no lead crossing the shoulder joint.

  • What are the DVLA driving rules after an S-ICD?

    For a primary-prevention ICD you must stop driving for 1 month for a Group 1 (car) licence. For a secondary-prevention ICD (after a cardiac arrest or sustained VT) it is 6 months off Group 1 driving. Group 2 (HGV/PSV) licences are usually permanently barred once any ICD is implanted. You must notify the DVLA.

  • Will private medical insurance cover an S-ICD?

    Cover for S-ICD implantation varies by insurer, but Bupa, AXA Health, Vitality, Aviva, WPA, Cigna and Healix will usually fund it where the indication is clearly documented and NICE / BHRS criteria are met.

  • What does it feel like if the S-ICD shocks me?

    Patients describe an appropriate shock as a hard, sudden thump to the chest - unpleasant but brief, and it means the device has done its job. Inappropriate shocks (usually from T-wave oversensing) have been reduced substantially by the SMART Pass algorithm on the current EMBLEM generator. If you receive any shock, you should contact the EP team the same day.

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