Complex PCI - Calcified Lesion
Tjen Jhung Lee1, Balachandran Kandasamy1
National Heart Institute, Malaysia1
We detailthe history of an 88 year old fit man withbackground hypertension and benignprostatic hyperplasia, planned for surgical treatment. A pre-operative Exercise stress ECHOshowed ST depressions with hypokinesia at the anterior segments at peakexercise.
Invasivecoronary angiogram at another academic-based hospital showed severe calcified3VD thus he was advised for CABG but patient not keen due to the age-relatedrisks. He had chest pain and was readmitted for NSTEMI 2 weeks later.
Electrocardiogram: T inversions in leads V1-V3 at rest
Stress Echocardiogram: Hypokinesia at the anterior segment with dynamic ST-downsloping depressions at peak exercise, associated with breathlessness and vague chest discomfort
2D Echocardiogram: Ejection fraction 56% with regional wall motion abnormalities at the anterior basal to mid segment, valves are normal.
Troponin T levels 540pg/ml (normal < 14pg/ml)
Invasive coronary angiogramLeft Main Stem (LMS): Critical 99% distal LMS stenosis caused by calcified nodule
Left Anterior Descending (LAD): Severe 90% ostial calcified stenosis, severe 95% mid LAD stenosis, heavily calcified, with large coronary aneursyms at proximal and mid segments
Left Circumflex (LCx): Diffuse calcified disease non-dominant vessel
Right Coronary Artery(RCA): Critical 99% stenosis caused by calcium nodule at mid RCA
Impression: Severe calcified 3 vessel disease
Heart team meeting was held, and patient outright refused bypass surgery due to age-related peri-operative risks and background COPD. Thus high-risk multivessel angioplasty was done in two stages.
First procedure was angioplasty to RCA. Via femoral access ,and with temporary pacing wire for backup, engaged a JR 3.5 7Fr, workhorse wire then exchanged for rota-floppy wire and performed Rotational Artherectomy at 180000rpm.Successful procedure and stented with 3.5x38mm DES, NC balloon 4.0mm at high pressures, guided by intravascular ultrasound (IVUS)
Second procedure was done after a week, again via femoral access, EBU 3.5 7Fr catheter engaged to LMS. Careful wiring with two workhorse wires into LAD and LCX, then predilated with 2.0x12mm NC balloon to open a small channel to provide flow. Optical coherence tomography (OCT) done showing severe stenosis of distal LM (MLA 1.4mm2) caused by eruptive calcium nodule and severe circumferential calcified plaque and mid LAD, with a OCT-Calcium score of 4/4, needing artherectomy. Decided to proceed withRotational Artherectomy with 1.5mm burr at 180000rpm. Guide manipulation and slower burr speed at 160000rpm used to improve wire bias and attain better debulking results. Successfully stented 3.0x28mm at mid LAD overlap with 3.5x23mm stent from proximal LAD to body of LM, NC 3.5mm mid LAD and POT at LMS with 4.5x8mmballoon at high pressure. Final OCT showed well expanded stent (expansion index145%) with good MSA and no stent malopposition.
Patient recovered well post angioplasty and was discharged home the next day. He is well at 1 months clinic follow up with NYHA class 1 and no chest pain, and has returned to his usual routine of cycling.
In conclusion, high-risk complex angioplasty can be successfully performed with low rates of complications when done with proper planning and in stages. This case illustrates how different intracoronary imaging modalities (IVUS and OCT) have been instrumental in choosing the right calcium debulking methods, ensuring good stent expansion and reducing the risk of stent failure. In summary, intracoronary imaging should be mandated in cases with heavily calcified plaque.