Tip In Technique as bailout in a Retrograde CTO PCI in Philippine Heart Center: A case report

By Anna Katrina Chua, Ronaldo Estacio, Jhoanna Marcelo
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Anna Katrina Ng Chua


Anna Katrina Chua1, Ronaldo Estacio1, Jhoanna Marcelo1


Philippine Heart Center, Philippines1
Complex PCI - Chronic Total Occlusion

Tip In Technique as bailout in a Retrograde CTO PCI in Philippine Heart Center: A case report

Anna Katrina Chua1, Ronaldo Estacio1, Jhoanna Marcelo1

Philippine Heart Center, Philippines1

Clinical Information

Patient initials or Identifier Number


Relevant Clinical History and Physical Exam

A 61 year old male ,hypertensive,diabetic , non compliant to medications, with history of stroke with left sided residuals, 50 pack year smoker and previous heavy alcoholic drinker .He presented with severe, substernal chestpain 8 hours prior to admission accompanied by shortness of breath and diaphoresis. Managed as a case of STEMI of Inferior wall, in Cardiogenic Shock, with Ventricular tachycardia.Synchronized Cardioversion and ACLS was done an patient was transferred in PCI capable institution.

Relevant Test Results Prior to Catheterization

12 L ECG ST elevation leads II, III, aVF ( inferior wall) V3R V4R ( RV extension) and V7 , V8 ( Posterior wall)

Relevant Catheterization Findings

Left main has 50% distal segment stenosis. LAD had  95% ostioproximal segment stenosis becoming totally occluded at the proximal segment before  D1 , the more distal segment is visualized via right to left collaterals. LCx, non dominant with 70-80% mid segment stenosis and 95% distal segment stenosis. RCA dominant with 70% aortoostial segment stenosis associated with ventricularization of pressure followed by 99% proximal segment stenosis

Interventional Management

Procedural Step

POBA of RCA was done in the index event with result of TIMI 3 flow. IABP was inserted with LVEDP of 52mmHg. Plan initially is to send patient for CABG but Heart team approach computed high STS and Euroscore, hence referred back for multivssel complex PCI. Antegrade wire escalation using  Corsair Pro Asahi Microcatheter initially loaded with Sion Blue until it reaches the CTO proximal cap. Wire exchange done with  Asahi Fielder XT-A with and later on exchanged with a Gaia 3rd Asahi within the microcatheter but went into the subintimal space confirmed by donor vessel injection several times Plan is to go retrograde approach but we proceeded with PCI of the proximal RCA 1st and deployed a a 3.0 x 32mm DES in the aortoostial to the proximal segment of the RCA.Septal surfing using a Caravel Asahi Microcatheter loaded with Asahi sion blue and was exchanged with Asahi Suoh 3 and finally Asahi Sion which successfully crossed the 2nd septal collateral and was positioned at the tip of the distal cap of CTO.Retrograde wire escalation using a Gaia 3rd Asahi exchanged to a Asahi Conquest Pro 12 used to do retrograde true lumen puncture. Retrograde microcatheter attempted several times but with resistance. Tip in technique was done by advancing the antegrade microcatheter over the retrograde guidewire in the antegrade guide. Double lumen microcatheter was inserted in place of antegrate micro catheter which facilitated wiring of mid to distal LAD. PCI proceeded antegradely with DES.

Case Summary

Tip in technique is done by advancing the antegrade microcatheter over the retrograde guidewire in the antegrade guide, allowing easy, predictable, and successful antegrade wiring by inserting a wire into the antegrade microcatheter which allows successful revascularization of a CTO after failure to externalize. Advantages include decreased risk of vessel injury, decreased risk of donor vessel ischemia, decreased risk of bleeding  and decreased risk for wire entrapment .