MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION SYNERGY MEGATRON; CORONARY DRUG-ELUTING STENT

Model Number H7493942820350

Device Problems Obstruction of Flow (2423); Activation Failure (3270)

Patient Problem Restenosis (4576)

Event Date 09/02/2022

Event Type  Injury  

Manufacturer Narrative

A1 patient identifier: (b)(6).

Event Description

Evolve lv_xlv study.It was reported that stent under expansion, restenosis and intervention occurred.In (b)(6) 2021, the subject presented with angina, was referred for cardiac catheterization, and was enrolled in the megatron cohort of the evolve lv xlv study.The target lesion was located in mid right coronary artery (rca) with 90% stenosis and was 16 mm long with a reference vessel diameter of 4.5 mm.The target lesion was treated with pre-dilation and placement of a synergy megatron 3.5 mm x 20 mm stent.Following post-dilatation, residual stenosis was noted to be 5% with timi flow 3.One day later, the subject was discharged on aspirin and clopidogrel.In (b)(6) 2022, the subject was noted with megatron stent under expansion and restenosis of the stent and was admitted to the hospital.Angiography was performed which revealed significant ostial rca in-stent restenosis (isr), focal moderate disease in the posterior descending artery (pda) and obtuse marginal (om) branches, as well as moderate disease throughout the mid left anterior descending artery (lad).Successful intravascular ultrasound (ivus) guided percutaneous coronary intervention (pci) was performed to the instantaneous wave-free ratio (ifr) positive ostial rca isr using a 5.00 mm non-compliant balloon and a 4.50 mm wolverine cutting balloon.The same day, the event was considered resolved and the subject was discharged.

Manufacturer Narrative

A1 patient identifier: (b)(6).H6 device codes: corrected to obstruction of flow from activation failure including expansion failures.

Event Description

Evolve lv_xlv study.It was reported that instent restenosis and intervention occurred.In june 2021, the subject presented with angina, was referred for cardiac catheterization, and was enrolled in the megatron cohort of the evolve lv xlv study.The target lesion was located in mid right coronary artery (rca) with 90% stenosis and was 16 mm long with a reference vessel diameter of 4.5 mm.The target lesion was treated with pre-dilation and placement of a synergy megatron 3.5 mm x 20 mm stent.Following post-dilatation, residual stenosis was noted to be 5% with timi flow 3.One day later, the subject was discharged on aspirin and clopidogrel.In september 2022, the subject was noted with megatron stent under expansion and restenosis of the stent and was admitted to the hospital.Angiography was performed which revealed significant ostial rca in-stent restenosis (isr), focal moderate disease in the posterior descending artery (pda) and obtuse marginal (om) branches, as well as moderate disease throughout the mid left anterior descending artery (lad).Successful intravascular ultrasound (ivus) guided percutaneous coronary intervention (pci) was performed to the instantaneous wave-free ratio (ifr) positive ostial rca isr using a 5.00 mm non-compliant balloon and a 4.50 mm wolverine cutting balloon.The same day, the event was considered resolved and the subject was discharged.It was further reported that in august 2022, the baseline electrocardiogram (ekg) showed sinus rhythm with occasional premature ventricular contractions (pvcs).During exercise, significant st-segment changes were observed, including a 4 mm horizontal st depression in leads v4-v6 and a 1 mm down-sloping st depression in inferior leads during stage 2.These changes did not meet myocardial infarction (mi) reporting criteria in the final assessment.It was also further reported that in september 2022, subject was noted with symptoms related to in-stent restenosis during a cardiac checkup, not stent under expansion as previously reported.A coronary angiogram was performed as noted above.The ifr test yielded a negative result for mid lad disease, with a value of 0.96.The left ventricular end-diastolic pressure (lvedp) was measured at 17 mmhg, and there was no observed gradient on pullback across the transcatheter aortic valve replacement (tavr) prosthesis.Angiography also noted 70% in-stent restenosis in the ostial rca and was treated with 5.00 mm nc balloon and a 4.50 mm wolverine cutting balloon.Post treatment, timi flow was noted to be 3.On the same day the event was considered to be resolved and the subject was discharged.A recommendation of aggressive medical therapy for stable angina in a setting of focal and branch vessel disease was noted.

• Brand Name: SYNERGY MEGATRON
• Type of Device: CORONARY DRUG-ELUTING STENT
• Manufacturer (Section D): BOSTON SCIENTIFIC CORPORATION; 300 boston scientific way; marlborough MA 01752
• Manufacturer (Section G): BOSTON SCIENTIFIC CORPORATION; ballybrit business park; galway ; EI
• Manufacturer Contact: rachel shields ; 4100 hamline ave n; arden hills, MN 55112 ; 6512422111
• MDR Report Key: 17652578
• MDR Text Key: 322310947
• Report Number: 2124215-2023-43765
• Device Sequence Number: 1
• Product Code: NIQ
• UDI-Device Identifier: 08714729985655
• UDI-Public: 08714729985655
• Combination Product (y/n): Y
• Reporter Country Code: US
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: Study,Health Professional,Company Representative
• Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date: 09/27/2023

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 08/30/2023
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Expiration Date: 12/02/2021
• Device Model Number: H7493942820350
• Device Lot Number: 0026495670
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Date Manufacturer Received: 09/01/2023
• Was Device Evaluated by Manufacturer?: Device Not Returned to Manufacturer
• Date Device Manufactured: 12/02/2020
• Is the Device Single Use?: Yes
• Is This a Reprocessed and Reused Single-Use Device?: No
• Type of Device Usage: Initial
• Patient Sequence Number: 1
• Patient Outcome(s): Required Intervention
• Patient Age: 78 YR
• Patient Sex: Male
• Patient Race: White