1. EPT-10887_03/09 © 2009 Boston Scientific Corporation or its affiliates. All rights reserved. Performance always matters. Blazer™ Dx-20 Diagnostic Catheter Bidirectional Duodecapolar Diagnostic Catheter on the Blazer Catheter Platform In-Service Presentation

2. EPT-10887_03/09 Performance always matters. 2 Blazer™ Dx-20 Catheter Product Description Bidirectional Duodecapolar Diagnostic Catheter on the Blazer ™ Catheter Platform 20 electrodes on soft, extended distal tip Size: 7Fr 2 curve options Super Large and Medium Curve Wide range of electrode spacing options Single Cable Connection Clinical Applications Map AFL circuit Verify bidirectional block

3. EPT-10887_03/09 Performance always matters. 3 Blazer™ Dx-20 Catheter Product Specifications Blazer Dx-20 Catheter 20 electrodes on extended distal tip –Distal tip length = 21 cm Tip Electrode Length = 2.0 mm Ring Electrode Length = 1.2 mm Curve Options –Super Large Curve = 56 mm –Medium Curve = 25 mm Useable Length –Super Large Curve = 100 cm –Medium Curve = 109 cm Cable Single quick connect cable connection with 20 pins Cable Length = 1.5 meters. Single-use only at launch –10x resterilizeable by EtO & Sterrad

4. EPT-10887_03/09 Performance always matters. 4 Blazer™ DX-20 Catheter Curve Options Standard Placement (PA View) (Super Large Curve) Coronary Sinus RA Lateral Wall Left Atrium Super Large Curve Diameter = 56 mm –Comparable to competitive duodecapolar Dx catheters Catheter introduction and placement similar to “traditional” duodecapolar Dx catheters Blazer Dx-20 Super Large Curve 56 mm

5. EPT-10887_03/09 Performance always matters. 5 Blazer™ DX-20 Catheter Curve Options Medium Curve Diameter = 25 mm –Diameter optimized for CS access Design features assist in catheter introduction and placement One Dx catheter for recording along RA lateral wall and in CS –Reduces # of Dx catheters in RA Isthmus region left unobstructed for AFL ablation Alternative CS_RA Placement (PA View) (Medium Curve) Coronary Sinus RA Lateral Wall Left Atrium Unobstructed isthmus region One catheter records RA and CS Blazer Dx-20 Medium Curve 25 mm

6. EPT-10887_03/09 Performance always matters. 6 Demonstration of Blazer™ Dx-20 Catheter Super Large & Medium Curves

7. EPT-10887_03/09 Performance always matters. 7 Blazer™ Dx-20 Catheter Handle & Packaging Differentiators It’s Blue Tactile Features Integrated Connector Color Band New Icons Package has color differentiation for easy differentiation from ablation catheter packaging Blazer Dx-20 Catheter Packaging Product i.d. information on reverse side Blazer Dx-20 Catheter Handle Handle has color and tactile differentiators for easy differentiation from Rx catheter handle

8. EPT-10887_03/09 Performance always matters. 8 Blazer™ Dx-20 Catheter Catheter Product Labeling Schematic with electrode spacing, curve dimension, tip size, and useable length Circle design element contains shaft & tip size End Panel Front Panel Side Panel Fold Over Note: Pouch label identical to carton label, but without end and back panels and with purple color treatment Key information presented on side panel Product name and description Key information presented on end panel Peel-off labels for patient chart

9. EPT-10887_03/09 Performance always matters. 9 Single cable connection with 20 pins Cable Length = 1.5 meters Single-use only at initial launch –10x resterilizeable by EtO & Sterrad Simplified catheter-to-cable connection –Catheter & cable alignment markings (dots) –Color coding and labeling of pin-out connections New packaging for easy product identification Blazer™ Dx-20 Catheter Cable Packaging & Connections Single Connector Quick Connect Cable

10. EPT-10887_03/09 Performance always matters. 10 Blazer™ Dx-20 Catheter Cable Product Labeling Product name and description Schematic with cable length Peel-off labels for patient chart Note: Pouch label identical to carton label, but without end and back panels Front Panel End Panel Back Panel Key information presented on end panel Fold Over

11. EPT-10887_03/09 Performance always matters. 11 Blazer™ Dx-20 Catheter Model Numbers Model NumberCurveElectrode Spacing M004 20SL222 0Super Large2/2/2mm M004 20SL555 0Super Large5/5/5mm M004 20SL252 0Super Large2/5/2mm M004 20SL282 0Super Large2/8/2mm M004 20SL2102 0Super Large2/10/2mm M004 20SL2860 0Super Large2/8/2/8/2/8/2/8/2/60/2/8/2/8/2/8/2/8/2mm M004 20SL22025 0Super Large2/20/2/2/2/2/2/2/2/2/2/2/2/25/2/25/2/25/2mm M004 20M222 0Medium2/2/2mm M004 20M252 0Medium2/5/2mm M004 20M25505 0Medium2/5/2/5/2/5/2/5/2/50/5/5/5/5/5/5/5/5/5mm M004 20M27028 0Medium2/2/2/2/2/2/2/2/2/70/2/8/2/8/2/8/2/8/2mm M004 20M5405 0Medium5/5/5/5/5/5/5/5/5/40/5/5/5/5/5/5/5/5/5mm M004 20M2840 0Medium2/8/2/8/2/8/2/8/2/40/2/8/2/8/2/8/2/8/2mm M004 20M21035 0Medium2/10/2/10/2/10/2/10/2/35/2/10/2/10/2/10/2/10/2mm M004 20S 0 (cable)N/A