CORONARY - Complications
The Bail Out Case of Iatrogenic Left Main Coronary Artery Dissection - What Should We Do?
Naoya Yabumoto1, Wataru Nagamatsu1
Hokusetsu General Hospital, Japan1,
80 Y.O. female. She suffered from acute myocardial infarction 2 years ago. And primary coronary intervention was performed with deploying DES at culprit RCA. At this time, follow up angiogram was planned.
Follow up CAG revealed no ISR and progression LAD lesion. During FFR study for LAD, LMCA dissection, which extended to LAD and LCx distal part, occurred during injection using 6F Launcher EBU 3.5 guiding catheter. ECG ST level was elevated in broad leads and she suffered from chest pain, nevertheless, blood pressure level remained.
Immediately bail out PCI was started. Firstly LAD wiring was done with Sion blue guide wire, however, this wire tip was difficult to reach to distal part. There was a potential for subintima wiring. Next, we try to insert another Sion blue wire to LCX. This second guide wire got advance to LCX distal part smoothly and could select small branches. For the confirmation of LCX and LAD guide wire position, IVUS study performed. IVUS study clearly showed that LCX guide wire was in true lumen and LAD guide wire was in subintima lumen. The key point of getting advance to LAD true lumen was the wiring starting position where was carina. IVUS study indicated actual carina part without dissection entry. For intentional bifurcation wiring, a double lumen catheter (DLC) was used. After the wire was got advance to LAD and ECG ST level was improved. IVUS study showed this third wire was in LAD true lumen. Under IVUS guidance two DESs were deployed from LMT to LAD. After deployed stent, ECG ST level was re-elevated. IVUS study revealed big and long hematoma at stent distal part. This hematoma made a limitation of blood flow at LAD. For resolving this status, cutting balloon inflation was performed for creating fenestration. Eventually cutting balloon made fenestration. IVUS showed modified-small hematoma. LAD blood flow was resumed and ECG ST level was improved. For avoiding additional dissection, we had never done injection from guiding. IVUS guidance and injection using DLC were done instead. Those options and issues overcame the LMCA complication. After 7days from this procedure, Coronary CT angiogram showed healed vessel lumen and optimal stenting.
For the bail-out of LMCA dissection, we performed 1. IVUS guided wiring, 2. Intentional wiring using DLC, 3. Fenestration using cutting balloon, 4. Avoiding injection from guiding catheter. LMCA complication is a common cause of periprocedural mortality. Emergent coronary artery bypass surgery (CABG) is an option for managing LMCA complications. However, because of hemodynamic deterioration during the preparation of CABG, the probability of a high postoperative mortality rate has been considered. We describe a bail-out case of iatrogenic LMCA dissection. Some tips will have efficacy for bail management.