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No Harm in Short Aspirin Duration After PCI for ACS

November 8, 2023
in Health News
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SAN FRANCISCO — Stopping aspirin within 1 month of implanting a drug-eluting stent (DES) for acute coronary syndrome (ACS) followed by ticagrelor monotherapy was shown to be noninferior to 12 months of dual antiplatelet therapy (DAPT) in net adverse cardiovascular and bleeding events in the T-PASS trial.

“Less than one month of DAPT followed by ticagrelor monotherapy met a noninferiority threshold and provided evidence of superiority to 12 months of ticagrelor-based DAPT for a 1-year composite outcome of death, myocardial infarction, stent thrombosis, stroke, and major bleeding, primarily due to a significant reduction in bleeding events,” senior author Myeong-Ki Hong, MD, PhD, Yonsei University College of Medicine, Seoul, Korea, told attendees here at the Transcatheter Cardiovascular Therapeutics 2023 congress.

“This study provides evidence that stopping aspirin within 1 month after implantation of drug-eluting stents for ticagrelor monotherapy is a reasonable alternative to 12-month DAPT as for adverse cardiovascular and bleeding events,” Hong concluded.

The study was published in Circulation ahead of print to coincide with the presentation.

Three Months to 1 Month

Previous trials (TICO and TWILIGHT) have shown that ticagrelor monotherapy after 3 months of DAPT can be safe and effectively prevent ischemic events after percutaneous coronary intervention (PCI) in ACS or high-risk PCI patients.

The current study aimed to investigate whether ticagrelor monotherapy after less than 1 month of DAPT was noninferior to 12 months of ticagrelor-based DAPT for preventing adverse cardiovascular and bleeding events in patients with ACS undergoing PCI with a DES implant.

T-PASS, carried out at 24 centers in Korea, enrolled ACS patients aged 19 years or older who received an ultrathin, bioresorbable polymer sirolimus-eluting stent (Orsiro, Biotronik). They were randomized 1:1 to ticagrelor monotherapy after

The primary outcome measure was net adverse clinical events (NACE) at 12 months, consisting of major bleeding plus major adverse cardiovascular events. All patients were included in the intention-to-treat analysis.

The study could enroll patients aged 19 to 80 years. It excluded anyone with active bleeding, at increased risk for bleeding, with anemia (hemoglobin ≤ 8 g/dL), platelets

Baseline characteristics of the two groups were well balanced. The extended monotherapy and DAPT arms had an average age of 61 ± 10 years, were 84% and 83% male and had diabetes mellitus in 30% and 29%, respectively, with 74% of each group admitted via the emergency room. ST-elevation myocardial infarction occurred in 40% and 41% of patients in each group, respectively.

Results showed that stopping aspirin early was noninferior and possibly superior to 12 months of DAPT.

For the 12-month clinical outcome, fewer patients in the P P = .002). Similar results were found for the 1-month landmark analyses.

T-PASS: Primary Outcome

Endpoint Ticagrelor-Based 12-Month DAPT (Cumulative Incidence, %) Hazard Ratio (95% Confidence Interval) P (Noninferiority) P (Superiority)
12-month clinical outcome 2.8 5.2 0.54 (0.37 – 0.80) .002
1-month landmark analyses 2.0 4.1 0.48 (0.31 – 0.75) .001

 

For both the 12-month clinical outcome and the 1-month landmark analyses, the curves for the two arms began to diverge at about 150 days, with the one for ticagrelor monotherapy essentially flattening out just after that and the one for the 12-month DAPT therapy continuing to rise out to the 1-year point.

In the

Hong replied, “Actually, we recommend less than one month, so therefore in some patients, it was the operator’s decision,” depending on risk factors for stopping or continuing aspirin. He said that in some patients it may be reasonable to stop aspirin even in 7 to 10 days. Fewer than 10% of patients in the

There was no difference between the P = .51).

However, the 12-month DAPT arm showed a significantly greater incidence of major bleeding at 1 year: 3.4% vs 1.2% for P

Hong said that a limitation of the study was that it was open-label and not placebo-controlled. However, an independent clinical event adjudication committee assessed all clinical outcomes.

Lead discussant Marco Valgimigli, MD, PhD, Cardiocentro Ticino Foundation, Lugano, Switzerland, noted that T-PASS is the fifth study to investigate ticagrelor monotherapy versus a DAPT, giving randomized data on almost 22,000 patients.

“T-PASS showed very consistently with the prior four studies that by dropping aspirin and continuation with ticagrelor therapy compared with the standard DAPT regimen is associated with no penalty…and in fact leading to a very significant and clinically very convincing risk reduction, and I would like to underline major bleeding risk reduction,” he said, pointing out that this study comes from the same research group that carried out the TICO trial.

Hong has received institutional research grants from Samjin Pharmaceutical and Chong Kun Dang Pharmaceutical, and speaker’s fees from Medtronic and Edwards Lifesciences. Kastrati has disclosed no relevant financial relationships. Valgimigli has received grant support/research contracts from Terumo Medical Corporation and AstraZenca; consultant fee/honoraria/speaker’s bureau for Terumo Medical Corporation, Bayer AG, Daiichi-Sankyo/Elil Lilly and Company, Amgen, Alvimedica, AstraZenca, Idorsia, Coreflow, Vifor, Bristol-Myers Squibb, and iVascular. The study was funded by Biotronik.



Source link : https://www.medscape.com/viewarticle/998191?src=rss

Author :

Publish date : 2023-11-08 00:08:58

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