What is the clinical evidence from this study?

Study design: RCT. Population: ST-segment elevation myocardial infarction (STEMI) (n=50). Intervention: Prasugrel vs. Ticagrelor 180 mg loading dose. Primary outcome: Platelet reactivity units (PRU) 2 h after the loading dose (p=NS).

What does this research mean for the field?

A 60 mg prasugrel loading dose is noninferior to a 180 mg ticagrelor loading dose for platelet inhibition at 2 hours in STEMI patients, with both agents taking at least 4 hours to achieve effective inhibition in the majority of patients. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate and compare the pharmacodynamic efficacy, platelet inhibition onset, and acute safety of prasugrel versus ticagrelor loading doses in patients presenting with ST-segment elevation myocardial infarction.

September 18, 2026Journal of the American College of CardiologyOpen Access

Comparison of Prasugrel and Ticagrelor Loading Doses in ST-Segment Elevation Myocardial Infarction Patients

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Key result

Prasugrel loading dose proves noninferior to ticagrelor for two-hour residual platelet reactivity in STEMI.

P NS
n=50

Authors

GPGuido ParodiInterventional / Structural Cardiology RVRenato ValentiAzienda Ospedaliero-Universitaria Careggi BBBenedetta BellandiOspedale San Giuseppe

Discussion

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Implication

Comparative study evaluates antiplatelet efficacy of prasugrel versus ticagrelor loading doses in heart attack patients, highlighting rapid platelet inhibition differences.

Key Points

To evaluate and compare the pharmacodynamic efficacy, platelet inhibition onset, and acute safety of prasugrel versus ticagrelor loading doses in patients presenting with ST-segment elevation myocardial infarction.
Assessed patients presenting with acute ST-segment elevation myocardial infarction undergoing primary percutaneous coronary intervention who received loading doses of either prasugrel or ticagrelor.
Measured residual platelet reactivity and the time course of antiplatelet onset post-administration along with acute procedural outcomes.
Both P2Y12 inhibitor loading strategies provide potent and rapid platelet inhibition during acute myocardial infarction.
Qualitative response curves demonstrate swift reductions in platelet reactivity without substantial differences in immediate ischemic complications between the two regimens.

Study Design

Type

RCT (n=50)

Randomization

randomized

PICO

Population

50 patients with STEMI undergoing primary percutaneous coronary intervention with bivalirudin monotherapy.

Intervention / Comparator

Prasugrel vs Ticagrelor 180 mg loading dose (60 mg loading dose)

Primary Outcome

Platelet reactivity units (PRU) 2 h after the loading dose, p=NS

Main Result

Absolute Event Rate: 217% vs 275%

p-value: p=NS

Cite This Study

Parodi et al. (2013) conducted an RCT in ST-segment elevation myocardial infarction (STEMI) (n=50). Prasugrel vs. Ticagrelor 180 mg loading dose was evaluated on Platelet reactivity units (PRU) 2 h after the loading dose (p=NS). A 60 mg prasugrel loading dose was noninferior to a 180 mg ticagrelor loading dose for residual platelet reactivity at 2 hours in STEMI patients (217 vs 275 PRU; p=NS).

synapsesocial.com/papers/6aacacef2d3fc7ba74827667 https://doi.org/10.1016/j.jacc.2013.01.024

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Implication

Comparative study evaluates antiplatelet efficacy of prasugrel versus ticagrelor loading doses in heart attack patients, highlighting rapid platelet inhibition differences.

Comparison of Prasugrel and Ticagrelor Loading Doses in ST-Segment Elevation Myocardial Infarction Patients

Discussion

Member takes

Implication

Key Points

Study Design

PICO

Main Result

Cite This Study

Comparison of Prasugrel and Ticagrelor Loading Doses in ST-Segment Elevation Myocardial Infarction Patients

Discussion

Member takes

Implication

Key Points

Study Design

PICO

Main Result

Cite This Study

Also Consider

Also Consider