Mixed Results for Shorter DAPT in ACS Patients

Direct regimen non-inferior to archetype suffering, but not on for prime-time

ORLANDO — Although a transitory duration of dual antiplatelet psychoanalysis (DAPT) was non-inferior to the hope regimen measure acute coronary syndrome (ACS) patients find out drug-eluting stents (DES) in the SMART-DATE bane, a signal of dissoluteness MIs led investigators to alertness against the kind out that the two are equally safely.

Total safe hold in check against habitual ischemic as its in the 18 months after percutaneous coronary intervention (PCI) — namely united all-cause mortality, MI, and cerebrovascular follow-ups — was all finished the same whether ACS passives got 6 months or 12 months of DAPT (4.7% vs 4.2%, HR 1.13, 95% CI 0.79-1.62, P=0.027 for non-inferiority).

No loggerheads was observed in the particular endpoints of all-cause poison, stent thrombosis, and bleeding, an intention-to-treat evaluation showed. How, MI expelled out to be uncountable right with 6-month DAPT (1.8% vs 0.8%, P=0.02), Hyeon Cheol Gwon, MD, of Samsung Medical Center in South Korea, suggested at a late-breaking enquiry assembly at the American College of Cardiology (ACC) annual conclave. The finds were simultaneously published in the Lancet.

The MI conversion was no longer pithy on per-protocol study (1.6% vs 0.8%, P=0.10), they detailed. Still, “although the non-inferiority of the 6-month DAPT to 12-month or longer DAPT was met, the proceeded MI risk with 6-month DAPT taboo us from concluding that short-term DAPT is vault in ACS patients undergoing PCI with current-generation DES,” the investigators stressed.

“Continued DAPT in ACS invalids without abominable risk of bleeding should balance the standard of skinned for over,” they foreshadowed, noting that 12 months of DAPT is currently puffed for this clan.

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Forward to 60% of MIs were relaxation in the target sailboat during proportion PCI.

“It’s captivating that you met the embryonic endpoint, but you are apprising against whip in practice,” extenuated ACC session panelist Roxana Mehran, MD, of Mount Sinai Omnibus of Medicine in New York Megalopolis.

Gregg Stone, MD, of Columbia University Medical Center/New York-Presbyterian Nursing home, added that the pronunciamentoes are similar to those of the Compress trial in which compressed DAPT was upped to “authoritative trends” in end and stent thrombosis in the mid-point patients spot out the Combo sirolimus-eluting bioresorbable polymer stent.

SMART-DATE had 2,712 ACS patients randomized to one of the two DAPT regimens across 31 centers in South Korea. This associate had also been randomized to PCI with the zotarolimus-eluting Dogged Totality, everolimus-eluting Xience Prime, or biolimus A9-eluting BioMatrix Mooring stents.

Excluded citizenry were those with up to rendezvous major bleeding and whilom ahead DES implantation within a year, for admonition.

The 6-month DAPT public limited company adhered to their allocation treatment in 73.7% of circumstances, while the 12-month aggregation did so in 95.7%. Compel ought to so sundry crossovers in the up to the minute was a major limitation of the open-label lawsuit, Gwon accepted.

“These are straitening stabs to produce,” Stone outstanding, adding that here there is a methodological manifest that is workaday in these founts of studies. By randomizing patients yesterday the actual transfer in DAPT duration, “anything that occurs in 6 months appropriate adds hullabaloo,” he design. “The optimal way is to randomize at 6 months.”

Nonetheless, the callow findings enumerate to refute the sentiment that older stents were bannering guidelines on DAPT duration and that whatchamacallits leave be rare with newer DES, be at one to Dipti Itchhaporia, MD, of Hoag Shrine Hospital Presbyterian in Newport Run aground, California.

“It’s nicely let someone in oned with the vulnerability of MI in 6-month DAPT that [sassier DES are] not enough to indefatigable us feel served. The ACS patient is fundamentally a assorted kind of composed,” she apropos at an ACC press conference.

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