Intervensional cardiology all hard wares
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interventional cardiology hardware devices equipment complete overview 2024
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Now I have everything I need for a comprehensive, well-illustrated answer. Here is the complete guide to all interventional cardiology hardware:
Interventional Cardiology: All Hardware
Source: Harrison's Principles of Internal Medicine, 22nd Edition (2025) - Chapter 287
Historical Background
PTCA (percutaneous transluminal coronary angioplasty) was introduced by Andreas Gruentzig in 1977. Coronary stents arrived in 1994, reducing acute thrombosis and restenosis by half. Drug-eluting stents (DES) followed in 2003, further slashing restenosis rates. Today, PCI is performed on >900,000 patients/year in the US alone.
CATEGORY 1: Vascular Access Hardware
Arterial Sheath (Introducer Sheath)
- Inserted into the radial artery (preferred, less bleeding risk) or femoral artery
- Provides a hemostatic valve and port for catheter exchange
- French sizes: 5F-8F (coronary); 14F-20F+ (structural heart/TAVR)
- Radial access has become dominant due to reduced access-site bleeding
Arteriotomy Closure Devices
- Collagen-based (e.g., Angio-Seal): plug seals femoral arteriotomy
- Suture-based (e.g., Perclose ProGlide): pre-placed suture closes the arteriotomy
- Clip-based (e.g., StarClose): nitinol clip apposition
- Used after femoral access; radial access uses compression bands (e.g., TR Band)
CATEGORY 2: Catheters
Guiding Catheter
- The "workhorse" catheter - sits in the coronary ostium
- Provides coaxial support and delivers contrast + devices
- Multiple tip shapes: Judkins Left (JL), Judkins Right (JR), Amplatz, XB/EBU (extra backup), AL, AR
- Selection depends on aortic root size, coronary anatomy, and access site
Diagnostic Catheter
- Used for coronary angiography only (no intervention)
- Thinner walls, smaller lumen - not suitable for device delivery
- Examples: Judkins, Tiger, Ikari, Radifocus
Microcatheter
- Delivered over a guidewire to chronic total occlusions (CTOs) or complex anatomy
- Enables guidewire exchange, contrast injection distally, and increased torque transmission
- Examples: Finecross, Corsair Pro, Turnpike, Teleport
Balloon Catheter (see Category 4 below)
Aspiration Catheter
- Manual suction device (e.g., Export AP) to aspirate thrombus in STEMI
- Now less routinely used (TASTE and TOTAL trials showed no mortality benefit; risk of stroke with routine use)
CATEGORY 3: Guidewires
The guidewire is passed through the guiding catheter and navigated across the coronary stenosis under fluoroscopy. All other devices are then advanced over it ("monorail" or "over-the-wire" systems).
| Property | Types/Examples |
|---|---|
| Workhorse wires (low stenosis) | BMW Universal, Runthrough NS, Fielder XT-R |
| Support wires (tortuous anatomy) | Iron Man, Mailman, Grand Slam |
| CTO wires (crossing occlusions) | Gaia series, Confianza Pro, Fielder XT, Hornet |
| Polymer-tipped (atraumatic) | Pilot series, Whisper |
| Pressure wires (FFR/iFR measurement) | PressureWire X (Abbott), Verrata Plus (Philips/Volcano) |
Key specs: diameter (0.014" standard), stiffness, tip load, hydrophilic vs. hydrophobic coating, torquability.
CATEGORY 4: Balloon Catheters
Balloon Angioplasty - Mechanism
The balloon is advanced over the guidewire, positioned across the stenosis, then inflated (typically 6-20 atm) to stretch and disrupt the plaque. This expands the lumen and creates small controlled dissections that are then scaffolded by stenting.
Types of Balloon Catheters
| Type | Purpose | Notes |
|---|---|---|
| Semi-compliant | Pre-dilation, post-dilation, general use | Expands beyond nominal size at higher pressures |
| Non-compliant (NC) | High-pressure stent expansion, resistant lesions | Minimal size change with pressure; avoids geographic miss |
| Drug-coated balloon (DCB) | In-stent restenosis, small vessels, bifurcations | Paclitaxel-coated; delivers drug without leaving a permanent implant |
| Scoring/Cutting balloon | Calcified, resistant, or ostial lesions | Atherotomes or scoring wire on surface fracture calcified plaque |
| Cryoplasty balloon | Peripheral use primarily | Delivers cold energy to induce apoptosis |
| Kissing balloon | Bifurcation lesions | Two balloons simultaneously inflate in main vessel + side branch |
CATEGORY 5: Coronary Stents
A. Bare Metal Stents (BMS)
- Metal scaffold only (cobalt-chromium or stainless steel)
- Introduced 1994; solved acute recoil and dissection after balloon angioplasty
- Major problem: ~20-30% restenosis (neointimal hyperplasia)
- Now largely replaced by DES except where prolonged DAPT is contraindicated
B. Drug-Eluting Stents (DES) - Current Standard of Care
- Metal platform + biodegradable or durable polymer + antiproliferative drug
- Restenosis reduced to <5%
- Drug examples: Everolimus, Zotarolimus, Sirolimus, Paclitaxel
- Common DES platforms:
| Device | Drug | Maker |
|---|---|---|
| XIENCE Sierra / Xpedition | Everolimus | Abbott |
| Resolute Onyx | Zotarolimus | Medtronic |
| SYNERGY | Everolimus (bioabsorbable polymer) | Boston Scientific |
| Orsiro | Sirolimus (bioabsorbable polymer) | Biotronik |
| Ultimaster Nagomi | Sirolimus | Terumo |
- Require dual antiplatelet therapy (DAPT) ideally for 12 months post-implant (aspirin + P2Y12 inhibitor) due to delayed endothelial healing
C. Bioresorbable Vascular Scaffolds (BVS)
- Fully dissolve over ~2-3 years, leaving no permanent metal
- Abbott ABSORB BVS (PLLA polymer + everolimus) - withdrawn from market after higher scaffold thrombosis rates
- Research continues with newer iteration designs (Magmaris - magnesium alloy)
D. Drug-Eluting Balloons (DEB) - Stentless Strategy
- Used for in-stent restenosis and small vessels (<2.5 mm) where stenting is avoided
- Paclitaxel coating transfers drug into vessel wall within 60 seconds of inflation
CATEGORY 6: Plaque Modification Devices
For heavily calcified or resistant lesions that balloons cannot adequately expand:
| Device | Mechanism | Example |
|---|---|---|
| Rotational atherectomy | High-speed diamond-coated burr (140,000-180,000 rpm) ablates calcified plaque into micro-particles (<10 microns) | Rotablator (Boston Scientific) |
| Orbital atherectomy | Eccentrically rotating crown sands calcium, wider treatment zone | Diamondback 360 (Cardiovascular Systems Inc.) |
| Intravascular lithotripsy (IVL) | Shockwave energy cracks both superficial and deep calcification, then balloon inflated | Shockwave S4 (Shockwave Medical) |
| Laser atherectomy (ELCA) | Excimer laser vaporizes plaque, useful in ISR and undilatable lesions | Spectranetics/Philips |
| Cutting/scoring balloon | Atherotome blades score calcified plaque | AngioSculpt, NSE Cutting Balloon |
CATEGORY 7: Imaging & Physiologic Assessment Hardware (Intracoronary)
Fractional Flow Reserve (FFR) / iFR
- Pressure wire placed beyond stenosis; measures ratio of distal to proximal pressure
- FFR <0.80 = hemodynamically significant; guides decision to stent vs. defer
- iFR (instantaneous wave-free ratio) - similar, no adenosine needed
- Devices: PressureWire X (Abbott), Verrata (Philips/Volcano), Coroventis CoroFlow
Intravascular Ultrasound (IVUS)
- 20-60 MHz ultrasound transducer on catheter tip
- Visualizes lumen dimensions, plaque burden, calcium location, stent apposition
- Used for stent sizing and optimization
- Devices: EAGLE Eye (Philips/Volcano), Revolution (Boston Scientific), AltaView (ACIST)
Optical Coherence Tomography (OCT)
- Near-infrared light; 10x higher resolution than IVUS
- Best for stent edge assessment, strut coverage, dissection identification
- Requires blood clearance (contrast flush)
- Devices: ILUMIEN OPTIS/ULUMIEN OPTA (Abbott), OPTIS Integrated (Abbott)
Near-Infrared Spectroscopy (NIRS) + IVUS
- Identifies lipid-rich plaques at risk of rupture
- TVC Insight (Infraredx / Nipro)
CATEGORY 8: Thrombectomy & Embolic Protection Devices
| Device | Type | Use |
|---|---|---|
| Aspiration catheters | Manual suction | STEMI with large thrombus (e.g., Export AP, Eliminate) |
| Distal embolic protection filters | Filter wire in distal vessel | Saphenous vein graft PCI (e.g., FilterWire EZ - Boston Scientific) |
| Proximal embolic protection | Occlusion balloon proximal to lesion | SVG PCI (e.g., Proxis - St. Jude/Abbott) |
| Mechanical thrombectomy | Aspiration + fragmentation | AngioJet (rheolytic), Penumbra CAT RX |
CATEGORY 9: Hemodynamic Support Devices
For high-risk PCI or cardiogenic shock:
| Device | Support Level | Mechanism |
|---|---|---|
| Intra-Aortic Balloon Pump (IABP) | ~0.5 L/min augmentation | Balloon in descending aorta; counterpulsation improves diastolic coronary filling |
| Impella CP / Impella 5.5 | 2.5-5.5 L/min | Axial flow pump across aortic valve (Abiomed/J&J) |
| TandemHeart | Up to 4 L/min | Transseptal left atrial to femoral artery bypass |
| VA-ECMO | Full cardiopulmonary bypass | Peripheral veno-arterial extracorporeal membrane oxygenation |
CATEGORY 10: Structural Heart Disease Hardware
A. Septal Closure Devices
- Atrial Septal Defect (ASD): Amplatzer Septal Occluder (Abbott), Gore ASD Occluder
- Patent Foramen Ovale (PFO): Amplatzer PFO Occluder, Gore Cardioform
- Ventricular Septal Defect (VSD): Amplatzer Muscular VSD Occluder
B. Transcatheter Aortic Valve Replacement (TAVR)
- Balloon-expandable: SAPIEN 3 Ultra RESILIA (Edwards Lifesciences) - FDA approved Sept 2022
- Self-expanding: Evolut FX (Medtronic) - nitinol frame, repositionable
- Delivered via transfemoral, transapical, or transaortic access
C. Transcatheter Mitral Valve Repair/Replacement (TMVR)
- MitraClip (Abbott): clips the leaflets together - edge-to-edge repair; for functional or degenerative MR
- PASCAL (Edwards): similar concept with larger paddles and clasps
- Tendyne (Abbott): fully implantable transcatheter mitral valve
D. Tricuspid Valve Devices
- TRILUMINATE Pivotal (Abbott TriClip): edge-to-edge TR repair
- CLASP TR (Edwards): PASCAL for tricuspid
- Transcatheter tricuspid replacement (TTVr) devices in trials
E. Left Atrial Appendage (LAA) Closure
- Prevents cardioembolic stroke in AF patients who cannot tolerate anticoagulation
- Watchman FLX (Boston Scientific): nitinol plug-in LAA
- Amulet (Abbott): dual-disc occluder
F. Valvuloplasty Balloons
- Mitral balloon valvuloplasty (Inoue balloon): for rheumatic mitral stenosis - preferred non-surgical option
- Aortic balloon valvuloplasty: palliative or bridge to TAVR
CATEGORY 11: Peripheral & Renal Interventional Hardware
The field has extended beyond coronary arteries to include:
- Carotid stenting - embolic protection mandatory (filter or flow reversal); nitinol self-expanding stents
- Renal artery stenting - for renovascular hypertension (balloon-expandable stents)
- Iliac/femoral/SFA intervention - self-expanding nitinol stents, drug-coated balloons, atherectomy
- Renal denervation - Symplicity Spyral catheter (Medtronic) for resistant hypertension - delivers RF energy to renal artery adventitia to ablate sympathetic nerves
CATEGORY 12: Ancillary Hardware
| Item | Role |
|---|---|
| Inflation device (indeflator) | Hand-held syringe with pressure gauge; inflates/deflates balloons to precise atmospheres |
| Y-connector | Hemostatic valve at catheter hub; allows wire + contrast injection |
| Torque device | Rotates guidewire tip to steer |
| Manifold | Connects contrast injector, pressure transducer, and saline flush |
| Introducer needle & dilator | Initial vessel puncture and tract dilation |
| Power injector | Automated contrast delivery for angiography |
Summary Table
| Category | Key Hardware |
|---|---|
| Vascular access | Sheaths, closure devices |
| Catheters | Guiding, diagnostic, microcatheter, aspiration |
| Guidewires | Workhorse, support, CTO, pressure wires |
| Balloons | Semi-compliant, NC, DCB, cutting/scoring |
| Stents | BMS, DES (everolimus/zotarolimus), BVS, DEB |
| Plaque modification | Rotablator, orbital atherectomy, IVL, laser |
| Imaging/physiology | FFR/iFR wire, IVUS, OCT, NIRS |
| Thrombectomy | Aspiration catheters, embolic filters, AngioJet |
| Hemodynamic support | IABP, Impella, TandemHeart, ECMO |
| Structural heart | TAVR, TMVR, LAA closure, septal occluders, valvuloplasty |
| Peripheral | Carotid/renal/peripheral stents, renal denervation |
| Ancillary | Inflators, Y-connectors, manifolds, torque devices |
Harrison's Principles of Internal Medicine, 22nd Edition (2025), Chapter 287 - Percutaneous Coronary Interventions and Other Interventional Procedures
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