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Evandro Martins Filho, MD

Coronary Artery Disease & CTO PCI

Doença Arterial Coronariana e PCI para CTO

Enfermedad Arterial Coronaria e ICP para CTO

Expert care for complex coronary interventions

Cuidado especializado para intervenções coronárias complexas

Atención especializada para intervenciones coronarias complejas

What Is Coronary Artery Disease?

Coronary artery disease (CAD) happens when plaque builds up inside the arteries that supply blood to your heart. Think of it like a clogged pipe — the buildup narrows the opening, making it harder for blood to flow through.

When your heart doesn't get enough blood, you might feel chest pain (called angina), shortness of breath, or unusual fatigue. These are signs that your heart is working too hard and not getting enough oxygen.

Healthy ArteryNormal blood flow With Plaque BuildupPlaqueReduced blood flow

The good news: there are treatments that can help restore blood flow to your heart and relieve your symptoms.

What Is a Chronic Total Occlusion (CTO)?

A CTO is an artery that is 100% blocked for at least 3 months. "Chronic" means it's been there a long time, and "total occlusion" means completely blocked — no blood flows through it at all.

When this happens, your body is smart: it creates tiny detour blood vessels (called collaterals) around the blockage. But these detours aren't enough to give your heart all the blood it needs.

Many patients are told "nothing can be done" about a CTO. But that's not true anymore. Advanced techniques and specialized training now make it possible to open these blocked arteries safely.

Chronic Total Occlusion with Collateral Development 100% Blocked Collateral vessels (tiny detour vessels) Blood flow blocked

How CTO PCI Works

CTO PCI is a specialized procedure to reopen a completely blocked artery. Here's the step-by-step process:

Step 1: Wire CrossesSpecialized wirecrosses blockage Step 2: Balloon InflatesBalloon pushesplaque aside Step 3: Stent PlacedMetal stentholds it open Step 4: Flow RestoredNormal blood flowrestored

No open surgery needed. The procedure is done through a small puncture in your wrist (or groin). You'll usually stay in the hospital for 1-2 nights. Recovery is quick. Most patients go home the next day and resume normal activities within a week.

Complex & High-Risk PCI

Some patients have disease in multiple arteries, heavily calcified arteries (hardened and stiff), or blockages in the left main artery (which is critical). These are complex cases that require advanced skills and special tools.

These procedures may use special techniques like atherectomy (a tool that shaves away calcified plaque) or imaging technology (IVUS or OCT, which are like "ultrasound" cameras that let us see exactly what we're treating). These advanced interventions can be an alternative to bypass surgery in many cases.

Living with Angina & Improving Quality of Life

If you have refractory angina — chest pain that doesn't improve with medication — you know how limiting it can be. You may avoid activities you love. You may need multiple medications. Your quality of life is affected.

CTO PCI and complex PCI procedures can relieve your symptoms, reduce the number of medications you need, and help you exercise again. Many patients report returning to activities they thought they'd never do again.

How Dr. Martins Filho Can Help

Dr. Evandro Martins Filho is an interventional cardiologist with specialized fellowship training in CTO PCI. He performs over 600 PCI procedures each year and is recognized as a CTO specialist.

Whether you've been told your condition can't be treated, or you want a second opinion, Dr. Martins Filho can help evaluate your options.

To schedule a consultation: Have your doctor refer you, or contact us through the main website with your recent angiography films.

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CTO PCI: Indications, Techniques, and Outcomes

Evidence and Outcomes

The EURO-CTO trial demonstrated high success rates (>85%) with modern hybrid algorithms in experienced centers, with favorable long-term outcomes including symptom relief and reduced medication burden. The DECISION-CTO trial showed improved symptoms and exercise capacity following successful CTO PCI. Success rates with current techniques exceed 85% in high-volume centers. Lesion complexity assessment using the J-CTO score and PROGRESS-CTO score helps predict success and risk stratification.

Hybrid Algorithm Approach

Antegrade Wire Escalation (AWE): Sequential escalation of wire stiffness and support to cross lesions. Optimized for lesions with moderate complexity and calcification.

Antegrade Dissection Re-entry (ADR): Intentional wire or microcatheter dissection creating a subintimal space proximal to the occlusion, with re-entry distal to it. Effective for calcified, ambiguous, or tortuous lesions.

Retrograde Approach: Via collateral vessels, particularly useful when anterograde approaches fail. Requires collateral assessment and specialized techniques. Modern retrograde techniques have expanded the population of recanalizable CTOs significantly.

Angiographic image: Right coronary artery CTO before and after successful PCI with stent placement

Complex and High-Risk PCI

Left Main PCI

The EXCEL and NOBLE trials established non-inferiority of PCI versus CABG for left main disease in appropriate candidates. Left main PCI requires meticulous lesion assessment, staged procedures when necessary, and consideration of hemodynamic support for high-risk anatomy. Provisional single-stent strategy is preferred when feasible.

Bifurcation Management

Contemporary bifurcation strategies emphasize provisional stenting with main branch optimization. Two-stent techniques (culotte, crush, DK-crush) reserved for cases with large, diseased side branches. The IVUS-guided provisional approach reduces restenosis compared to routine two-stent strategies.

Calcified Lesion Treatment

Severely calcified lesions present unique challenges. Techniques include: Intravascular Lithotripsy (IVL) for sonic pulse energy disruption of calcium; Rotational Atherectomy for elliptical debulking; Orbital Atherectomy with flexible shaft technology; and Laser Angioplasty for fibrocalcific plaque.

Hemodynamic Support

High-risk PCI increasingly incorporates mechanical circulatory support. Impella devices provide up to 5.0L/min support with active unloading. ECMO offers higher flow for cardiogenic shock scenarios. Careful patient selection, timing, and post-procedure weaning protocols optimize outcomes.

IVUS/OCT imaging: Severely calcified lesion before and after atherectomy and stent optimization

Intravascular Imaging Guidance

IVUS vs. OCT: Clinical Applications

IVUS: Superior for assessment of vessel size and plaque burden. Penetration depth (~4-5mm) allows interrogation of vessel walls. Excellent for calcification evaluation and chronic occlusion assessment.

OCT: Resolution (~10-15 microns vs. 150 for IVUS) enables detection of thin-cap fibroatheromas and subtle stent malapposition. Superior for edge dissection and tissue prolapse assessment. Limited penetration (~2mm) in calcified vessels.

Optimization Endpoints

IVUS-guided optimization targets minimal stent area (MSA) >80% of distal reference vessel, complete lesion coverage, and expansion ratio >80%. OCT optimization focuses on mean stent area (typically >5.5mm² for left main), coverage of all side branches, and absence of edge dissection >200 microns or malapposition >200 microns.

Side-by-side IVUS and OCT imaging: comparison of modalities for stent assessment and optimization

Referring a Patient

We welcome referrals for patients with chronic total occlusions, complex multivessel disease, left main interventions, heavily calcified lesions, and refractory angina unsuitable for medical management alone.

What to Send

Contact Information

Referrals can be submitted through our main website contact page or directly through electronic health systems if integrated. For urgent consultations or complex cases, please call directly. We typically schedule consultations within 1-2 weeks. A multidisciplinary heart team discussion is encouraged for complex anatomy.