TAVI / TAVR Procedure: Minimally Invasive Aortic Valve Replacement for Heart Valve Stenosis

Expert Video Overview & Clinical Insights

For international patients across Sub-Saharan Africa, accessing specialized cardiovascular interventions requires careful clinical evaluation, multidisciplinary review, and well-coordinated travel logistics. Planning this journey ensures that candidates are thoroughly screened prior to departure, guaranteeing seamless transfer to leading cardiac centers with minimal delay and maximum safety.

To help patients and families understand the technical nuances and multidisciplinary teamwork involved in transcatheter valve replacement, watch the medical video below featuring the team at Centre Cardio-Thoracique de Monaco (CCM Channel) demonstrating the TAVI procedure and high-tech hybrid imaging:

Key medical insights highlighted by the clinical specialists in the video include:

Watch the cardiovascular specialists at the Centre Cardio-Thoracique de Monaco explain the TAVI procedure in detail above.

• Multidisciplinary Heart Team Collaboration: "The TAVI procedure is conducted within a state-of-the-art hybrid operating room where interventional cardiologists, cardiac surgeons, vascular surgeons, and cardiac anesthesiologists work in synchronized unison." — Centre Cardio-Thoracique de Monaco Clinical Team

• Anchoring Within Native Structures: "Unlike open surgery where the diseased valve is excised, TAVI anchors the new artificial valve directly inside the calcified native valve leaflets, utilizing the native calcium structure as a secure foundation." — Centre Cardio-Thoracique de Monaco Clinical Team

• Precision Hybrid Imaging: "Modern hybrid operating rooms utilize robotic C-arms and 3D image fusion—combining pre-procedural CT scans with live fluoroscopy—to navigate catheters and position the valve with millimeter precision." — Centre Cardio-Thoracique de Monaco Clinical Team

What Is TAVI / TAVR?

Transcatheter Aortic Valve Implantation (TAVI)—commonly referred to as TAVR in North America—is a minimally invasive, catheter-based procedure designed to replace a severely narrowed aortic valve.

Anatomical Mechanism and Access Routes — The aortic valve sits between the left ventricle (the heart's main pumping chamber) and the aorta (the main blood vessel delivering blood to the body). During TAVI, a collapsed artificial valve is navigated through the arterial system using specialized delivery catheters:

• Transfemoral Access (Primary Route): In over 90% of cases, access is achieved percutaneously via a small puncture in the femoral artery in the groin. The catheter is guided up through the iliac artery and aorta into the heart.

• Alternative Access Routes: If a patient has severely diseased, narrow, or calcified leg arteries, alternative routes are utilized—such as transsubclavian (under the collarbone), transaortic (direct access via the upper chest), or transapical (via a small incision in the chest wall directly into the tip of the heart).

Valve Technology & Anchoring Mechanism

Unlike surgical valve replacement, which cuts away the calcified native valve leaflets and sutures a new valve in place, TAVI anchors the prosthetic valve inside the native valve.

The native calcium deposits serve as an anchoring frame for the expansion of the new valve. The prosthetic valves typically consist of tissue leaflets (such as bovine or porcine pericardium) mounted on a collapsible cobalt-chromium or nitinol metal stent frame. The frame is deployed inside the aortic annulus using either balloon inflation or self-expanding technology.

How a Heart Team Evaluates TAVI Candidacy

TAVI may be considered for selected patients with severe, symptomatic aortic valve stenosis or failing structural bioprosthetic valves (Valve-in-Valve procedure). Whether TAVI is an appropriate option—and which valve replacement approach is used—depends on a combination of factors, including age, valve and vascular anatomy, surgical risk, life expectancy, and other medical conditions. This determination is made by a multidisciplinary Heart Team of cardiologists and cardiac surgeons, not through patient self-assessment. Symptoms that commonly prompt this evaluation include exertional dyspnea (shortness of breath during normal daily activities), angina or chest pressure during physical exertion, presyncope or syncope (dizziness, lightheadedness, or sudden fainting), chronic fatigue and reduced exercise tolerance, and signs of congestive heart failure (fluid retention, leg swelling).

Examples of Factors a Heart Team Assesses — The criteria below illustrate the kinds of clinical assessments a Heart Team uses to evaluate candidacy; they are examples of that process, not a checklist patients can apply to determine their own eligibility. TAVI was initially approved for patients considered inoperable or at high surgical risk, and its use has since expanded:

• High & Prohibitive Surgical Risk: The Heart Team may consider TAVI for patients aged 80 years and above, or those with severe comorbidities (such as chronic kidney disease, prior coronary artery bypass grafting, frailty, or porcelain aorta), among other factors weighed during evaluation.

• Intermediate & Low Surgical Risk: Following thorough Heart Team evaluation, TAVI may also be considered for select intermediate-risk and lower-risk older adults.

Treatment Comparison: TAVI vs. Traditional Surgery

Understanding the differences between TAVI and conventional Surgical Aortic Valve Replacement (SAVR) helps patients and families make informed treatment choices:

Diagnostic Workup: Key Pre-Procedure Evaluations

Prior to undergoing TAVI, a comprehensive diagnostic protocol is mandatory to measure the aortic root's dimensions, select the correct prosthetic valve size, and verify arterial access pathways.

• ECG-Gated Cardiac Computed Tomography (Cardiac CT): The primary planning tool for TAVI. Accurately measures the aortic valve annulus area, perimeter, coronary ostia height, and degree of calcification. Evaluates the entire vascular tree (iliac and femoral arteries) to verify catheter access diameter.

• Transthoracic & Transesophageal Echocardiography (TTE / TEE): Measures pressure gradients across the aortic valve, aortic valve area, and left ventricular ejection fraction.

• Coronary Angiography (Cardiac Catheterization): Checks for concurrent coronary artery disease. If significant blockages exist, stenting (PCI) may be performed prior to or during TAVI.

• Comprehensive Laboratory Workup: Includes complete blood count, renal function testing (creatinine, eGFR to ensure contrast dye clearance), and coagulation profiles.

Intraoperative Overview

• Preparation: The patient is placed in a hybrid catheterization suite equipped with advanced fluoroscopy and 3D fusion imaging.

• Vascular Access: The clinical team establishes percutaneous access via the femoral artery in the groin.

• Crossing the Valve: A specialized guidewire is carefully navigated across the narrowed aortic valve into the left ventricle.

• Rapid Pacing & Valve Deployment: To temporarily drop cardiac output and stabilize positioning, rapid ventricular pacing is initiated. The prosthetic valve is precisely expanded inside the native valve.

• Verification: Angiography and echocardiography confirm valve opening, coronary flow clearance, and check for paravalvular leaks.

• Closure: Vascular closure devices seal the femoral access site without requiring surgical sutures in the groin.

Post-Procedure Recovery & Monitoring

• Immediate Post-Op: Patients are monitored in a cardiac telemetry unit for 12 to 24 hours.

• ECG Monitoring: Continuous monitoring tracks the heart's electrical conduction system to rule out heart block.

• Discharge: Most patients are ambulatory within 24 hours and discharged within 2 to 4 days.

Clinical Benefits

• Immediate Symptom Relief: Patients experience rapid improvement in shortness of breath, chest pressure, and energy levels.

• No Open Chest Incision: Avoids sternotomy complications and minimizes post-operative pain.

• Rapid Recovery: Enables older or frail patients to regain mobility and independence within days.

• No Heart-Lung Machine: Reduces systemic inflammatory stress associated with cardiopulmonary bypass.

Possible Risks and Complications

• Conduction Disturbances (Pacemaker Need): Expansion of the valve frame near the heart's electrical pathways may require a permanent pacemaker in a small percentage of patients.

• Vascular Complications: Bleeding, hematoma, or injury at the femoral access site.

• Paravalvular Leak: Minor blood leakage around the outer frame of the prosthetic valve.

• Stroke Risk: Micro-calcification debris can dislodge during positioning; embolic protection filters are frequently used to minimize risk.

Expert Insights Summary

As emphasized by the clinical team at the Centre Cardio-Thoracique de Monaco:

• On Procedural Precision: "Success in transcatheter valve implantation relies on meticulous pre-procedural CT planning, ensuring that the prothesis fits the annulus perfectly while preserving coronary artery flow."

• On Patient Selection: "TAVI offers a transformative, minimally invasive alternative for patients who face high surgical risks or who desire a rapid return to an active, independent life."

International Medical Care with CureSureMedico

For patients residing across Sub-Saharan Africa who require advanced structural heart procedures like TAVI, organizing medical travel requires seamless clinical oversight and logistical support. CureSureMedico provides a complete, transparent, and patient-centered framework:

• Remote Diagnostic Review & Second Opinions: CureSureMedico collects your local echocardiograms, cardiac CT scans, and medical reports. Our medical advisory panel coordinates pre-travel reviews with international interventional cardiologists to confirm procedural suitability.

• Transparent Flat-Fee Model: CureSureMedico operates with direct hospital billing and transparent flat-fee case management—ensuring no hidden markups or commissions on medical treatment.

• Pre-Travel Diagnostic Verification: Our team ensures all high-resolution cardiac CT scans meet strict TAVI sizing protocols before you fly, eliminating unnecessary travel expenses or unexpected delays.

• Comprehensive Logistics Facilitation: We manage medical visa support letters, priority hospital scheduling, airport transfers, hotel accommodations for family members, and dedicated bedside assistant services.

• Continuity of Care Back Home: Following your return home, CureSureMedico facilitates post-discharge tele-consultations, digital record sharing, and coordination with your local treating cardiologist in Africa.