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Presentation transcript:

MCV Campus Ginger Edwards

George W. Vetrovec, MD DISCLOSURES Consulting Fees Honoraria Gilead Sciences, Merck & Co., Inc., Abbott Vascular Honoraria Cordis, a Johnson & Johnson company, Eli Lilly and Company, Daiichi Sankyo, Inc., Gilead Sciences Grants/Contracted Research Corindus, Inc., Cordis, a Johnson & Johnson company, Merck & Co., Inc.

Percutaneous Coronary Intervention: Basic Techniques George W. Vetrovec, MD. VCU Pauley Heart Center MCV Campus Virginia Commonwealth University

PCI Basics Radiation Safety Angiography Contrast Volume Anatomic risk assessment of procedure Pharmacology Equipment use Stent Deployment Follow-up Angiography Compliance

Radiation Safety In PCI flouro accounts for more radiation than Cine Never fluoro when not viewing Multiple views Shielding One Step Rule

Coronary Angiography

Contrast Volume Limit!

Coronary Intervention: Optimal Coronary Angiography Goal is to adequately opacify coronary artery without streaming Properly positioned catheter Sufficiently large catheter lumen for necessary and available contrast injection (including the inside “equipment”) Always insure “reflux” (defining ostium)

Optimal Coronary Injection Pattern Dehmer & Popma: Cathsap III

Coronary Angiography for PCI Get a Clear View of vessel and lesion anatomy including side branches. Better yet, get two high quality orthogonal views. If the wire is not going properly in your “best view” look in a second view.

Proximal Ramus Stenosis

Coronary Angiography Lesion Classification: Coronary Angiographic Outcomes Predictors Based on AHA/ACC Grading System Type A Discrete Concentric Readily accessible Smooth Contour Little or no calcification Non ostial No major side branch involved Absence of thrombus

Coronary Angiography Lesion Classification: Coronary Angiographic Outcomes Predictors Based on AHA/ACC Grading System Type B Tubular Eccentric Moderate tortuosity Moderately angulated (45 – 900) Irregular contour Moderate – heavy calcification Total occlusion (< 3 months) Ostial Bifurcation lesion Thrombus present Note: B1 = characteristic only; B2 = 2 or more characteristics

Coronary Angiography Lesion Classification: Coronary Angiographic Outcomes Predictors Based on AHA/ACC Grading System Type C Diffuse Excessive Tortuosity Extremely angulated Total occlusion (> 3 months) Inability to protect major side branch Degenerated vein graft

Current Applicability of Lesion Classification Mayo Clinic 2004 review of 5000 cases In hospital MACE by lesion grade: Type A 1.2% Type B1 1.1% Type B2 2.2% Type C 4.9% Singh: J Am Coll Cardiol 2004;44:357-61

Distal Blood Flow/Collateral Classification Based on TIMI Trial Coronary Angiography Distal Blood Flow/Collateral Classification Based on TIMI Trial TIMI Grade Contrast Flow 0 (No perfusion) Antegrade flow to lesion; no flow beyond occlusion 1 (Penetration with Contrast passes beyond minimal perfusion) lesion but does not opacify distal vessel during cine run 2 (Partial perfusion) Contrast passes obstruction and fills distal vessel.However, rate of filling and/or washout slower than vessel segments outside lesion 3 (Complete perfusion) Contrast passes freely into distal at same visual rate as unaffected adjacent vessels

Adjunctive Pharmacology

“Necessary” Pharmacology Aspirin Clopidogrel/Prasugrel Anti-ischemic Therapy CHF Management if needed STATINS

General Patient Management Pharmacology helps stabilize patient Procedure electively only after patient clinically and hemodynamically stable!

Basic Equipment Use

Role of Guide Catheters Inject Contrast. Deliver Coronary Devices. Support Delivery of Devices/wires. Measure Arterial Pressure

Guide Catheters Shapes – Never the same as diagnostics Sizes – 6fr. To 9fr. The larger the shaft the greater the support. (Manufacturers have been unable to make Guides with internal diameters larger than the outer diameter!) Types – Judkins, Amplatz, Multi-purpose, Xb Side holes – Useful for RCA, Caution on Left Coronary (Limit coronary flow and injection)

Guide Catheters Shapes – Never the same as diagnostics Sizes – 6fr. To 9fr. The larger the shaft the greater the support. (Manufacturers have been unable to make Guides with internal diameters larger than the outer diameter!) Types – Judkins, Amplatz, Multi-purpose, Xb Side holes – Useful for RCA, Caution on Left Coronary (Limit coronary flow and injection)

Selection of Guide Catheters Inside diameter determines the ability to inject contrast once equipment in place. Solutions: Upsize or completely remove balloon from catheter for final pictures. Use monorail balloon catheters. 7fr. or 8fr. Improves visibility and flexibility using simultaneous or kissing balloons or stents in branch disease. (Monorails reduce size Guide Catheter size required)

Left Judkins Sizes Dehmer & Popma: Cathsap III

Left Judkins Manipulation Dehmer & Popma: Cathsap III

Left Judkins Manipulation Dehmer & Popma: Cathsap III

Right Judkins Sizing Dehmer & Popma: Cathsap III

Right Judkins Manipulation Dehmer & Popma: Cathsap III

Right Judkins Manipulation Dehmer & Popma: Cathsap III

Left Amplatz Curve Sizes Dehmer & Popma: Cathsap III

Amplatz Manipulation Dehmer & Popma: Cathsap III

Catheter Pressure Measurement Dehmer & Popma: Cathsap III

Characteristics of Guide Catheters vs. Diagnostics Relatively larger lumen. “Stiffer” Consequence as can “kink” readily. Forward and backward motion as well as rotation often necessary to deliver torque without “kinking” catheter. Tip Non Tapered. Tip May be Soft or Radiopaque.

Guiding Catheters Judkins Amplatz Voda XB Multipurpose Williams Kimny El Gamal Arani Radial Shapes

Guide Catheters Support: Left Coronary: Amplatz, XB, L Judkins – Smaller curve allows one to “Amplatzise” left. Right Coronary: Amplatz

Guide Catheters Removing Amplatz Guide from Left Coronary (to avoid Deep-Throating) Advance and turn counter clockwise to have fall out into ventricle. Removing from Right Coronary Turn counter clockwise and withraw.

Guideswire Tip characteristics: Shapes – All shapeable, but some retain shape better. The stiffer the tip the greater push to cross a lesion but the greater the risk of perforation. Stiffness - Floppy, Intermediate, etc. Shaft Characteristics: Support – regular, extra support, etc. The greater the support the easier deliverability except in tortuous vessels where stiffness may create friction in the vessel.

Guide Wires Shaping: Usual – 30 – 60 degree Hockey Stick configuration. Circumflex Marginal – “S” bend. LAD (High Takeoff) Left Judkins configuration.

Guide wires Pearls: Teflon coated wires increase risk of perforation while they may improve cross ability. Therefore always change out as soon as across lesion to avoid perforation. High support guide wires may not traverse extreme tortuosity – so may need to cross with low support wire and then exchange. Wires with graded shaft stiffness transition improves wire passage through tortuosity. Rotating wire as advanced with balloon/stent backup will improve guide wire steerability and advancement.

Stent Deployment

Stent Deployment Correct size. Correct Position. Complete apposition Before Placing DES be sure no impending surgery

Drug Eluting Stent: Significance of Apposition

DES: Restenosis

Post Procedure Angiography

Coronary Dissection

Coronary Dissection

Think first: Use force Last

Compliance Stent Selection Follow up

Percutaneous Interventional Techniques: The Basics Conclusions: Careful planning and appropriate use of angiography, pharmacology, basic equipment and procedures techniques can significantly reduce time, radiation and contrast volume while optimizing outcome and maximizing patient safety.