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Thromb Haemost 2024; 124(12): 1152-1161
DOI: 10.1055/a-2299-4537
Atherosclerosis and Ischaemic Disease

Clinical Impact of Dyspnea after Ticagrelor Treatment and the Effect of Switching to Clopidogrel in Patients with Myocardial Infarction

Sang Hyun Kim 
1   Division of Cardiology, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea
2   Division of Cardiology, Department of Internal Medicine, The Armed Forces Capital Hospital, Seongnam, Korea
,
Sanghoon Shin
1   Division of Cardiology, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea
,
Eun Ho Choo 
1   Division of Cardiology, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea
,
Ik Jun Choi
3   Division of Cardiology, The Catholic University of Korea, Incheon St. Mary's Hospital, Incheon, Korea
,
Sungmin Lim
4   Division of Cardiology, The Catholic University of Korea, Uijeongbu St. Mary's Hospital, Uijeongbu, Korea
,
Donggyu Moon
5   Division of Cardiology, The Catholic University of Korea, St. Vincent's Hospital, Suwon, Korea
,
Chan Joon Kim
4   Division of Cardiology, The Catholic University of Korea, Uijeongbu St. Mary's Hospital, Uijeongbu, Korea
,
Mahn-Won Park
6   Division of Cardiology, The Catholic University of Korea, Daejeon St. Mary's Hospital, Daejeon, Korea
,
Min Chul Kim
7   Department of Cardiology, Chonnam National University Hospital, Gwangju, Korea
,
Byung-Hee Hwang
1   Division of Cardiology, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea
,
Kwan Yong Lee
1   Division of Cardiology, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea
,
Yun Seok Choi
1   Division of Cardiology, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea
8   Division of Cardiology, The Catholic University of Korea, Yeouido St. Mary's Hospital, Seoul, Korea
,
Hee-Yeol Kim
9   Division of Cardiology, The Catholic University of Korea, Bucheon St. Mary's Hospital, Bucheon, Korea
,
Ki-Dong Yoo
5   Division of Cardiology, The Catholic University of Korea, St. Vincent's Hospital, Suwon, Korea
,
Doo Soo Jeon
3   Division of Cardiology, The Catholic University of Korea, Incheon St. Mary's Hospital, Incheon, Korea
,
Youngkeun Ahn
7   Department of Cardiology, Chonnam National University Hospital, Gwangju, Korea
,
Kiyuk Chang
1   Division of Cardiology, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea
,
on behalf of the TALOS-AMI investigators › Author Affiliations Funding This work was supported by ChongKunDang Pharm, Medtronic, Abbott, and Boston Scientific.
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Abstract

Background Dyspnea is frequent during ticagrelor-based dual antiplatelet therapy (DAPT) for acute myocardial infarction (AMI). However, its clinical characteristics or management strategy remains uncertain.

Methods The study assessed 2,617 AMI patients from the Ticagrelor versus Clopidogrel in Stabilized Patients with AMI (TALOS-AMI) trial. Dyspnea during 1-month ticagrelor-based DAPT and following DAPT strategies with continued ticagrelor or de-escalation to clopidogrel from 1 to 12 months were evaluated for drug adherence, subsequent dyspnea, major adverse cardiovascular events (MACE), and bleeding events.

Results Dyspnea was reported by 538 patients (20.6%) during 1 month of ticagrelor-based DAPT. Adherence to allocated DAPT over the study period was lower in the continued ticagrelor arm than the de-escalation to clopidogrel, particularly among the dyspneic population (81.1% vs. 91.5%, p < 0.001). Among ticagrelor-treated patients with dyspnea, those switched to clopidogrel at 1 month had a lower frequency of dyspnea at 3 months (34.3% vs. 51.7%, p < 0.001) and 6 months (25.5% vs. 38.4%, p = 0.002) than those continued with ticagrelor. In patients with dyspnea in their 1-month ticagrelor-based DAPT, de-escalation was not associated with increased MACE (1.3% vs. 3.9%, hazard ratio [HR]: 0.31, 95% confidence interval [CI]: 0.08–1.11, p = 0.07) or clinically relevant bleeding (3.2% vs. 6.2%, HR: 0.51, 95% CI: 0.22–1.19, p = 0.12) at 1 year.

Conclusion Dyspnea is a common side effect among ticagrelor-based DAPTs in AMI patients. Switching from ticagrelor to clopidogrel after 1 month in AMI patients may provide a reasonable option to alleviate subsequent dyspnea in ticagrelor-relevant dyspneic patients, without increasing the risk of ischemic events (NCT02018055).

Keywords

dyspnea - acute coronary syndrome - ticagrelor - clopidogrel

Authors' Contribution

K.C., C.J.K., M.-W.P., Y.A., and M.C.K. conceived and designed the study. K.C., C.J.K., M.-W.P., E.H.C., K.Y.L., and B.-H.H. accessed and verified the data. K.C., C.J.K., M.-W.P., Y.A., and M.C.K. participated in the steering committee, and contributed to implementation of the study. S.H.K. and E.H.C. wrote the first draft and submitted the final version for publication. All authors participated in enrolment of patients, did clinical follow-up, have reviewed the article, and agreed with the content and conclusions. K.C. and E.H.C. were responsible for the decision to submit the manuscript. K.C., C.J.K., M.-W.P., M.C.K., and Y.A. had full access to all the data in the study and had final responsibility for the decision to submit for publication.


Supplementary Material



Publication History

Received: 18 September 2023

Accepted: 02 April 2024

Accepted Manuscript online:
04 April 2024

Article published online:
03 May 2024

© 2024. Thieme. All rights reserved.

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