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Ticagrelor monotherapy following primary PCI for STEMI shows reduced non-access site bleedingTrial shows ticagrelor monotherapy may reduce bleeding after heart attack

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Key Takeaway
Note that ticagrelor monotherapy may reduce non-access site bleeding in STEMI patients, though efficacy remains unconfirmed.

The study evaluated the safety and efficacy of ticagrelor monotherapy compared to ticagrelor plus aspirin in patients who underwent primary PCI for ST-segment elevation myocardial infarction. The primary outcome was the incidence of major adverse cardiac and cerebrovascular events. The researchers observed no significant difference in these major events between the monotherapy and dual antiplatelet therapy groups.

Regarding secondary outcomes, the trial reported a downward trend in clinically relevant bleeding for those receiving ticagrelor monotherapy. Notably, the study found a significant reduction in clinically relevant non-access site bleeding in the monotherapy group compared to the dual therapy group. However, the incidence of intramyocardial hemorrhage remained similar between the two treatment arms.

The authors noted that the study was underpowered to confirm the efficacy of the intervention. Because of this limitation, the results regarding primary outcomes should be interpreted with caution. Clinicians may consider these findings as a signal regarding bleeding risks, but the evidence is currently insufficient to establish a definitive preference for monotherapy in this specific clinical context.

This pilot study looked at 200 patients who had a heart attack and received a procedure called primary PCI. Researchers compared two treatments: ticagrelor alone versus a combination of ticagrelor and aspirin. The goal was to see if one method was safer or more effective over a 13-month period.

The results showed no significant difference between the two groups regarding major cardiac and cerebrovascular events. However, the group receiving ticagrelor alone showed a significant reduction in bleeding at the site where the procedure was performed. Other types of bleeding, such as internal bleeding in the heart muscle, were similar in both groups.

Because this was a small pilot study, the results are not enough to change standard medical practice. The study was not large enough to confirm if one treatment is definitely better than the other. Patients should talk to their doctors about which treatment plan is safest for their specific health needs.

What this means for you:
Ticagrelor alone showed a reduction in site-specific bleeding but did not change overall heart event rates.

Common questions

Is ticagrelor monotherapy safer than using both ticagrelor and aspirin?

The study found that ticagrelor alone significantly reduced bleeding at the procedure site compared to the dual-drug approach. However, there was no significant difference in the total number of major cardiac or cerebrovascular events between the two groups. Because this was a small pilot study, it cannot confirm which treatment is definitively safer.

What kind of bleeding was reduced in the study?

Patients taking ticagrelor alone showed a significant reduction in clinically relevant non-access site bleeding, which was 2.0% compared to 9.9% in the dual-drug group. Other types of bleeding, such as intramyocardial hemorrhage, were similar in both groups. You should discuss these specific risks with your doctor.

How many people were involved in this study?

The study included 200 patients who had a heart attack and underwent primary PCI. The researchers followed these patients for 13 months to track heart events and bleeding. Because the study was small, it is considered a pilot study and may not be enough to change standard medical practices.

Study Details

Study typeRct
Sample sizen = 98
EvidenceLevel 2
Follow-up13.0 mo
PublishedJul 2026
View Original Abstract ↓
BACKGROUND: Ticagrelor monotherapy after a short period of dual antiplatelet therapy (DAPT) has been shown to be safe and effective after percutaneous coronary intervention (PCI), including primary PCI for patients with ST-segment elevation myocardial infarction (STEMI). However, the omission of aspirin could further reduce bleeding risk. AIMS: We aimed to assess the impact of ticagrelor monotherapy directly after primary PCI in terms of ischaemic events and to investigate the effect on clinical bleeding events. METHODS: In this multicentre, open-label pilot study, 200 STEMI patients were randomised 1:1 to ticagrelor monotherapy versus ticagrelor plus aspirin, directly after primary PCI. Major adverse cardiac and cerebrovascular events (MACCE) and bleeding were assessed at 13 months. The incidence of intramyocardial haemorrhage (IMH) was compared between groups. RESULTS: In the ticagrelor monotherapy group (n=98) and DAPT group (n=101), MACCE occurred in 4.1% versus 4.0%, respectively (hazard ratio [HR] 1.04, 95% confidence interval [CI]: 0.26-4.17). Clinically relevant bleeding was observed in 4.1% versus 10.9% (HR 0.37, 95% CI: 0.12-1.17), and clinically relevant non-access site bleeding in 2.0% versus 9.9% (HR 0.20, 95% CI: 0.04-0.92). CONCLUSIONS: While no significant difference in ischaemic events was observed between ticagrelor monotherapy and DAPT in the first 13 months after primary PCI, this pilot study was underpowered to confirm efficacy. In addition, non-access site bleeding events were significantly reduced, and there was a downward trend in all clinical bleeding events. The incidence of IMH was similar between groups. (ClinicalTrials.gov: NCT05986968).
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