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	<front>
		<journal-meta>
			<journal-id journal-id-type="publisher-id">dic</journal-id>
			<journal-title-group>
				<journal-title>Arquivos Brasileiros de Cardiologia Imagem cardiovascular</journal-title>
				<abbrev-journal-title abbrev-type="publisher">Arq Bras Cardiol: Imagem cardiovasc</abbrev-journal-title>
			</journal-title-group>
			<issn pub-type="epub">2675-312X</issn>
			<publisher>
				<publisher-name>Sociedade Brasileira de Cardiologia</publisher-name>
			</publisher>
		</journal-meta>
		<article-meta>
			<article-id pub-id-type="publisher-id">eabc97</article-id>
			<article-id pub-id-type="doi">10.47593/2675-312X/20203304eabc97</article-id>
			<article-categories>
				<subj-group subj-group-type="heading">
					<subject>Original Article</subject>
				</subj-group>
			</article-categories>
			<title-group>
				<article-title>Value of Cardiac Magnetic Resonance in the Diagnosis and Prognosis of Patients with Acute Myocardial Infarction with Nonobstructive Coronary Artery Disease (MINOCA)</article-title>
				<trans-title-group xml:lang="pt">
					<trans-title>Valor da Ressonância Magnética Cardíaca no Diagnóstico e no Prognóstico de Pacientes com Infarto Agudo do Miocárdio sem Doença Arterial Coronariana Obstrutiva (MINOCA)</trans-title>
				</trans-title-group>
			</title-group>
			<contrib-group>
				<contrib contrib-type="author">
					<name>
						<surname>Barros</surname>
						<given-names>Márcio Vinícius Lins de</given-names>
					</name>
					<xref ref-type="aff" rid="aff1"><sup>1</sup></xref>
					<xref ref-type="aff" rid="aff2"><sup>2</sup></xref>
				</contrib>
				<contrib contrib-type="author">
					<name>
						<surname>Ornelas</surname>
						<given-names>Carlos Eduardo</given-names>
					</name>
					<xref ref-type="aff" rid="aff2"><sup>2</sup></xref>
				</contrib>
				<contrib contrib-type="author">
					<name>
						<surname>Siqueira</surname>
						<given-names>Maria Helena Albernaz</given-names>
					</name>
					<xref ref-type="aff" rid="aff2"><sup>2</sup></xref>
				</contrib>
				<contrib contrib-type="author">
					<name>
						<surname>Militão</surname>
						<given-names>Rochelle Coppo</given-names>
					</name>
					<xref ref-type="aff" rid="aff2"><sup>2</sup></xref>
				</contrib>
				<contrib contrib-type="author">
					<name>
						<surname>Melo</surname>
						<given-names>Marcus de Almeida</given-names>
						<suffix>Júnior</suffix>
					</name>
					<xref ref-type="aff" rid="aff1"><sup>1</sup></xref>
				</contrib>
				<contrib contrib-type="author">
					<name>
						<surname>Costa</surname>
						<given-names>Sérgio Marcos Ferreira</given-names>
					</name>
					<xref ref-type="aff" rid="aff1"><sup>1</sup></xref>
				</contrib>
				<contrib contrib-type="author">
					<name>
						<surname>Rabello</surname>
						<given-names>Welber Azevedo</given-names>
					</name>
					<xref ref-type="aff" rid="aff1"><sup>1</sup></xref>
				</contrib>
				<contrib contrib-type="author">
					<name>
						<surname>Pena</surname>
						<given-names>Henrique Patrus Mundim</given-names>
					</name>
					<xref ref-type="aff" rid="aff2"><sup>2</sup></xref>
				</contrib>
			</contrib-group>
			<aff id="aff1">
				<label>1</label>
				<institution content-type="orgname">Health and Human Ecology College</institution>
				<addr-line>
					<named-content content-type="city">Vespasiano</named-content>
					<named-content content-type="state">MG</named-content>
				</addr-line>
				<institution content-type="original">Health and Human Ecology College, Vespasiano, MG;</institution>
			</aff>
			<aff id="aff2">
				<label>2</label>
				<institution content-type="orgname">Mater Dei Health Network</institution>
				<addr-line>
					<named-content content-type="city">Belo Horizonte</named-content>
					<named-content content-type="state">MG</named-content>
				</addr-line>
				<country country="BR">Brazil</country>
				<institution content-type="original">Mater Dei Health Network, Belo Horizonte, MG, Brazil.</institution>
			</aff>
			<author-notes>
				<corresp id="c01"> Mailing Address: Márcio Vinicius Lins Barros • Av. do Contorno, 9000 - Barro Preto, Belo Horizonte - MG, 30110-062 E-mail: <email>marciovlbarros@gmail.com.br</email>
				</corresp>
				<fn fn-type="con">
					<p>Authors’ contributions</p>
					<p>Research conception and design: Barros MVL, Ornelas CE, Siqueira MHA, Melo Júnior MA, Costa SMF, Rabello WA, and Pena HPM; data collection: Barros MVL, Siqueira MHA, Militão RC, Melo Júnior MA, Costa SMF, and Rabello WA; data analysis and interpretation: Barros MVL; statistical analysis: Barros MVL; manuscript writing: Barros MVL; and critical review of the manuscript for important intellectual content: Barros MVL, Ornelas CE, Siqueira MHA, Militão RC, and Pena HPM.</p>
				</fn>
				<fn fn-type="conflict">
					<p>Conflict of interest</p>
					<p>The authors have declared that they have no conflict of interest.</p>
				</fn>
			</author-notes>
			<pub-date date-type="pub" publication-format="electronic">
				<day>17</day>
				<month>12</month>
				<year>2021</year>
			</pub-date>
			<pub-date date-type="collection" publication-format="electronic">
				<season>Oct-Dec</season>
				<year>2020</year>
			</pub-date>
			<volume>33</volume>
			<issue>4</issue>
			<fpage>1</fpage>
			<lpage>7</lpage>
			<history>
				<date date-type="received">
					<day>8</day>
					<month>3</month>
					<year>2020</year>
				</date>
				<date date-type="rev-recd">
					<day>11</day>
					<month>5</month>
					<year>2020</year>
				</date>
				<date date-type="accepted">
					<day>27</day>
					<month>05</month>
					<year>2020</year>
				</date>
			</history>
			<permissions>
				<license license-type="open-access" xlink:href="https://creativecommons.org/licenses/by/4.0/" xml:lang="en">
					<license-p> This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. </license-p>
				</license>
			</permissions>
			<abstract>
				<title>Abstract</title>
				<sec>
					<title>Background</title>
					<p> Myocardial infarction is one of the major causes of morbidity and mortality worldwide and 13.2% of patients with acute coronary syndrome have normal or unobstructed coronary arteries, called MINOCA (Myocardial Infarction with Non-Obstructive Coronary Artery). Cardiac magnetic resonance (CMR) is the gold standard for investigating the etiology of acute coronary syndrome. Although MINOCA has a more benign evolution than myocardial infarction due to coronary obstruction, its prognostic factors are not completely elucidated.</p>
				</sec>
				<sec>
					<title>Objective</title>
					<p> To evaluate prognosis, predictive factors and describe the incidence of major adverse cardiovascular events in patients with MINOCA.</p>
				</sec>
				<sec>
					<title>Methods</title>
					<p> Prospective cohort through data collection of patients admitted to the emergency department of a tertiary hospital, diagnosed with MINOCA from 2012 to 2019. The mean follow-up was 45 months, the outcomes considered were: death, rehospitalization due to cardiac causes, recurrence of chest pain, myocardial revascularization (MACE).</p>
				</sec>
				<sec>
					<title>Results</title>
					<p> Of the 179 patients, 52% were male, with a mean standard deviation age of 57.3 ± 15.5 years. A MACE rate of 17.9% was observed during a mean follow-up of 45 ± 21 months. Mortality at the end of follow-up was 3.8%. In the multivariate analysis using the Cox regression model, patients with normal CMR was shown to be a predictor of good prognosis (HR 0.09; 95% CI 0.01 – 0.88; p = 0.04). The Kaplan-Meier curve showed a significant difference (Log Rank x2 = 9.83 p = 0.02) in the prediction of free MACE.</p>
				</sec>
				<sec>
					<title>Conclusion</title>
					<p> Normal CMR was an independent predictor of good prognosis in this sample and could be useful in the risk stratification of patients with MINOCA.</p>
				</sec>
			</abstract>
			<trans-abstract xml:lang="pt">
				<title>Resumo</title>
				<sec>
					<title>Fundamento</title>
					<p> O infarto do miocárdio é uma das principais causas de morbimortalidade no mundo, e 13,2% dos pacientes com síndrome coronariana aguda apresentam coronárias sem obstrução significativa, denominada MINOCA (do inglês Myocardial Infarction with Non-Obstructive Coronary Artery, Infarto do Miocárdio sem Doença Coronariana Obstrutiva). Apesar do MINOCA ter evolução mais favorável que o infarto do miocárdio por obstrução coronariana, seu prognóstico não é benigno. A ressonância magnética cardíaca é o exame que apresenta importância no diagnóstico das diversas causas de MINOCA, e seu valor prognóstico não está completamente elucidado.</p>
				</sec>
				<sec>
					<title>Objetivo</title>
					<p> Avaliar o valor prognóstico da ressonância magnética cardíaca na detecção de eventos adversos maiores em pacientes com MINOCA.</p>
				</sec>
				<sec>
					<title>Métodos</title>
					<p> Coorte prospectiva por meio de coleta de dados de pacientes admitidos na urgência de pacientes com hospital terciário, diagnosticados com MINOCA, no período de 2012 a 2019.</p>
				</sec>
				<sec>
					<title>Resultados</title>
					<p> Foram avaliados 179 pacientes com seguimento médio de 45 ± 21 meses, sendo 52% do sexo masculino, com idade média de 57,3 ± 15,5 anos. Observou-se incidência de eventos adversos maiores de 17,9%. A taxa de mortalidade ao final do acompanhamento foi de 3,8%. Na análise multivariada, apenas a ressonância magnética cardíaca com resultado normal se mostrou como preditor independente de bom prognóstico (hazard ratio: 0,09; intervalo de confiança de 95% 0,01-0,88; p = 0,04), com curva de Kaplan-Meier apresentando diferença significativa (log-rank x2 = 9,83; p = 0,02) na predição de eventos adversos maiores.</p>
				</sec>
				<sec>
					<title>Conclusão</title>
					<p> A ressonância magnética cardíaca normal mostrou-se como variável independente de bom prognóstico nessa população, podendo ser útil na estratificação de risco de pacientes com MINOCA.</p>
				</sec>
			</trans-abstract>
			<kwd-group xml:lang="en">
				<kwd>Acute Coronary Syndrome</kwd>
				<kwd>Magnetic Resonance Imaging</kwd>
				<kwd>Prognosis</kwd>
			</kwd-group>
			<kwd-group xml:lang="pt">
				<kwd>Síndrome Coronariana Aguda</kwd>
				<kwd>Imagem por Ressonância Magnética</kwd>
				<kwd>Prognóstico</kwd>
			</kwd-group>
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				<fig-count count="0"/>
				<table-count count="0"/>
				<equation-count count="0"/>
				<ref-count count="0"/>
				<page-count count="7"/>
			</counts>
		</article-meta>
	</front>
</article>