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Effects of Tirofiban Maintenance Duration on Myocardial Perfusion Defect Severity in Anterior Myocardial Infarction

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Abstract

Introduction

Percutaneous coronary intervention (PCI) does not often produce optimal results, despite restoration of coronary blood flow at myocardial recovery, because of impaired microvascular perfusion. This study aimed to investigate and evaluate with 99mTc-sestamibi scan whether the results of PCI can be changed by maintenance infusion of tirofiban for 24 or 48 h in patients presenting with anterior ST-elevation myocardial infarction (STEMI).

Methods

The study included 84 patients with anterior STEMI who were candidates for primary PCI and whose occlusion was in the proximal or mid-left anterior descending artery. Patients were given 25 μg/kg/3 min tirofiban and randomized to receive maintenance infusion at 0.15 μg/kg/min for 24 or 48 h. A resting 99mTc sestamibi scan was performed on the 5th day post-procedure before discharge. The primary efficacy endpoint was a patient’s score on a 5-point scoring system for perfusion defect severity. Major adverse cardiac events (MACE) were defined as death from any cause, re-infarction, and clinically driven target-vessel revascularization within the first 6 months.

Results

Baseline characteristics of the patients were similar in the two infusion groups (n = 42 per group). There was no significant difference in the symptom onset-to-presentation time or door-to-balloon time between the two groups. With the exception of basal anteroseptal and basal anterior segments, significant reductions were obtained on the 5-point scoring system for perfusion defect severity in segments and in the summed rest scores. No significant differences were observed between the two groups in the incidence of MACE at 6 months. The safety profile did not differ between 24 and 48 h infusions of tirofiban.

Conclusion

The use of tirofiban, when administered at a high bolus dose and maintained for 48 h, was safe and significantly reduced perfusion defect severity in patients with anterior STEMI presenting early after symptom onset and undergoing primary PCI.

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Acknowledgments

The authors would like to thank Atatürk University Rectorate and Chiesi Pharmaceutical Company employees, Tufan Yildirim and Oguz Ozturk, for their helpful discussions. No funding or sponsorship was received for this study or publication of this article.

Conflict of interest

M. Hakan Tas, Ziya Simsek, Arif Ayan, Ugur Aksu, Selami Demirelli, Yavuzer Koza, Zakir Lazoglu, Bedri Seven, and Huseyin Senocak declare that they have no conflict of interest. Dr. Tas is the guarantor for this article, and takes responsibility for the integrity of the work as a whole.

Compliance with ethics guidelines

The study was approved by the local ethical committee of the Atatürk University (B.30.2ATA.0.01.00/3). All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000. Informed consent was obtained from all patients for being included in the study.

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Correspondence to M. Hakan Tas.

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Tas, M.H., Simsek, Z., Ayan, A. et al. Effects of Tirofiban Maintenance Duration on Myocardial Perfusion Defect Severity in Anterior Myocardial Infarction. Adv Ther 30, 834–844 (2013). https://doi.org/10.1007/s12325-013-0055-y

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  • DOI: https://doi.org/10.1007/s12325-013-0055-y

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