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Cannabis-induced recurrent myocardial infarction in a 21-year-old man: a case report.

ABSTRACT: Background:Acute coronary syndrome (ACS) is rarely caused by coronary artery disease in young patients unless cardiovascular risk factors are present. Although non-atherosclerotic causes of ACS are rare, they need to be considered in young patients. Case summary:We report on a 21-year-old patient referred to our institution with ACS. Electrocardiogram showed ST-segment elevation and coronary angiography revealed thrombotic occlusion of the left anterior descending artery. Reperfusion was achieved by thrombus aspiration, glycoprotein IIb/IIIa inhibitors (GPI), and drug-eluting stent (DES). The patient had no cardiovascular risk factors but reported cannabis consumption before symptom onset. Although he was put on dual antiplatelet therapy and strictly advised to avoid consumption, he continued to abuse cannabis and suffered three further ACS events within 18?months: the first 8?months later caused by thrombotic occlusion of a diagonal branch treated by GPI and DES, the second after 17?months due to thrombotic re-occlusion of the diagonal branch, and the third after 18?months by thrombotic occlusion of the circumflex artery, both events treated by GPI alone (all while still using cannabis). Since then, he stopped cannabis consumption and has been symptom-free for 8?months. Discussion:This case highlights that cannabis-induced ACS must be considered as a cause of myocardial infarction in young adults. In contrast to ACS in the elderly population, this unusual ACS cause requires specific treatment. The risk of ACS relapse may substantial if cannabis abuse is continued. This potential hazard needs to be taken into consideration when legalization of cannabis is discussed.

SUBMITTER: Lawin D

PROVIDER: S-EPMC7319859 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Cannabis-induced recurrent myocardial infarction in a 21-year-old man: a case report.

Lawin Dennis D Lawrenz Thorsten T Tego Andi A Stellbrink Christoph C

European heart journal. Case reports 20200417 3

<h4>Background</h4>Acute coronary syndrome (ACS) is rarely caused by coronary artery disease in young patients unless cardiovascular risk factors are present. Although non-atherosclerotic causes of ACS are rare, they need to be considered in young patients.<h4>Case summary</h4>We report on a 21-year-old patient referred to our institution with ACS. Electrocardiogram showed ST-segment elevation and coronary angiography revealed thrombotic occlusion of the left anterior descending artery. Reperfus ...[more]

PMID: 32617514

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Project description:BackgroundPercutaneous coronary intervention with placement of a drug-eluting stent in a diabetic patient with ST-elevation myocardial infarction is a relatively common procedure, and always requires subsequent treatment with dual antiplatelet therapy. It is sometimes necessary to add oral anticoagulation therapy because of individual clinical circumstances, which further increases the risk of bleeding.Case presentationA 66-year-old hypertensive diabetic man with a history of gastrointestinal bleeding was admitted with an ST-elevation inferior myocardial infarction that had been evolving over 72 h. Electrocardiography showed ST segment elevation in the inferior leads and Q waves in the inferior and anterior leads. He reported a similar episode of chest pain 1 month previously, for which he had not sought medical treatment. Coronary angiography showed chronic occlusion of the mid-left anterior descending coronary artery, and acute occlusion of the mid-right coronary artery. He was treated by percutaneous coronary intervention, with placement of a drug-eluting stent in the right coronary artery. Soon after admission, transthoracic echocardiography showed abnormal left ventricular contractility and a large left intraventricular thrombus. Three weeks after admission, the patient was discharged on dual antiplatelet therapy (clopidogrel and aspirin) and oral anticoagulation therapy (acenocoumarol). Four months after discharge, transthoracic echocardiography showed absence of left ventricular thrombus and resolution of the abnormal contractility in the area supplied by the revascularized right coronary artery. Given the high risk of bleeding, oral anticoagulation therapy was stopped. Six months later, transthoracic echocardiography showed recurrent left ventricular apical thrombus, and an underlying hypercoagulable state was ruled out. Oral anticoagulation therapy was restarted on an indefinite basis, and dual antiplatelet therapy was continued.ConclusionsThe present case illustrates the need for repeat transthoracic echocardiography following the withdrawal of oral anticoagulation therapy in patients with ST-elevation myocardial infarction, both to monitor thrombus status and to assess left ventricular segmental contraction. In patients who require anticoagulation, avoidance of a drug-eluting stent is strongly preferred and second-generation stents are recommended. The alternative regimen of oral anticoagulation and clopidogrel may be considered in this scenario. In patients with recurrent intraventricular thrombus an underlying hypercoagulable state should be ruled out.

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Cannabis-induced recurrent myocardial infarction in a 21-year-old man: a case report.

Publications

Cannabis-induced recurrent myocardial infarction in a 21-year-old man: a case report.

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