Direct Flow Medical Experience with a Conformable, Repositionable Retrievable Percutaneous Aortic Valve Reginald Low MD University of California, Davis Sacramento, California
Disclosures Abbott Vascular - Consultant Boston Scientific - Consultant Direct Flow Medical - Consultant UC Davis
Introduction Feasibility, safety, and efficacy of TAVR with Edwards-Sapien and Medtronic CoreValve have been well demonstrated Large Effective Orifice Area Durability Securement No coronary obstruction Multiple sizes Delivery profile Opportunities for improvement Reduction of paravalvular insufficiency Improved access Profile, flexibilty and trackability Assess function before final deployment Precise positioning Repositioning Retrievable UC Davis
Direct Flow Medical Percutaneous Aortic Valve Design Features Bovine Pericardium Leaflets (anti-calcification treatment) Balloon Frame covered with Polyester Fabric Initial deployment - inflate frame with Saline/Contrast When acceptable final position and function are confirmed, Polymer media is infused to replace saline/contrast 18 French deliviery system Valve sizes - 25 mm, 27 mm treats annulus diameter 21 - 26 mm 3 check valves Valve is immediately functional when unsheathed and distal ring is inflated UC Davis
Direct Flow Medical Percutaneous Aortic Valve Design Features Delivery System Polymer nylon sleeve Multi-lumen catheter 3 position and fill wires 1 guide wire lumen Flexible nose cone Non-metallic delivery system and valve Flexible and trackable Precise positioning Retrievable with deflation and withdrawl into retrieval basket Position & Fill Lumens Aortic Ring Ventricular Ring Guidewire Lumen UC Davis
Direct Flow Medical Percutaneous Aortic Valve Valve loaded in Delivery System Valve Unsheathed Valve Inflated & Steering System Valve in Retrieval Basket UC Davis
Inflation, Deflation & Media Exchange UC Davis
Positioning & Securement UC Davis
Deliverability & Sealing UC Davis
Complex Valve and Vascular Anatomy 87 year old male Euroscore = 36.2 Moderately Calcified Leaflets &Native Annulus Extensive Calcification Marked Tortuosity 6 Month CT Current Status: 52 Months Post-Procedure Final Position UC Davis
Tracking - Aortic Arch Deliverable and precisely positionable in any arch configuration including Horizontal Arch UC Davis
Case Review: 009-01-003 (Cali) Access Summary No Complications UC Davis
Balloon Aortic Valvuloplasty UC Davis
Annulus and Procedure Results Systole Symmetric Calcium Score 1051 Diastole UC Davis
Case Summary UC Davis
Echo Pre Procedure Post TAVR Procedure UC Davis
Important Feature No significant paravalvular leak - aortic insufficiency UC Davis
Important Feature No significant paravalvular leak - aortic insufficiency UC Davis
Important Feature Important Feature No significant paravalvular leak - aortic insufficiency UC Davis
Important Feature No significant paravalvular leak - aortic insufficiency UC Davis
Important Feature No significant paravalvular leak - aortic insufficiency UC Davis
22 French Early Experience University Medical Center, Hamburg-Eppendorf (n=25) Helios Heart Center - Siegburg (n=6) High risk patients for cardiac surgery Patients Enrollment Number 31 / 22 Implants / 2 Surgical Conversions Age 82 ± 4 years Female/Male 16/15 NYHA III – IV 71% Logistic EuroSCORE 29 ± 7% Mean transvalvular gradient 49 ± 14 mmHg Aortic valve area 0.54 ± 0.13 cm2 LVEF 53 ± 15% UC Davis
22 French Early Experience 2 Year Data Effective orifice area - 1.5 cm2 Mean Echo gradient - 18.7 Functional Class I (75%) or II Aortic insufficiency - 73% none & 27% minimal 2 year survival - 69% CT - No change in position, diameter and orifice area over time Echo - Gradient 50.1±11.3 to 19.6±5.7 at 30 days - No change over time AVA - Baseline 0.57±0.15 cm2 to 1.47±0.35 cm2 at 30 days - No change over time UC Davis Bujuklic K et al. Circ Cardiovasc Interv. 2011 Dec 1;4(6):595-601
Present Studies Latest iteration (18 Fr) improved profile, positioning, valve loading into delivery sheath, radial force, valve competence, & simplified media exchange IP 009-01 South America - Colombia Study IP 010-01 European CE March Trial France, Germany, Italy UC Davis
Summary Direct Flow Medical Percutaneous Aortic Valve Non-metallic fabric covered balloon supported bovine pericardial valve with excellent trackability and deliverability Precise positioning, repositionable and retrievable Mechanical securement with conformability and sealing to minimize paravalvular leak Formed in-situ with exchange polymer media Design permits functional and hemodynamic assessment before final deployment Feasibility, safety and efficacy demonstrated with 22 F system European study with longest implant of 4.3 years CE Mark and South American (Colombia) trial enrolling No or trace paravalvular leak & no screening failures for peripheral access UC Davis
University of California Davis Medical Center Thank You University of California Davis Medical Center
UC Davis