Infarto agudo de miocardio en el paciente con marcapasos.

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Title: Infarto agudo de miocardio en el paciente con marcapasos.
Alternate Title: Acute Myocardial Infarction in the Patient with Pacemaker.
Authors: Martín Alanís-Naranjo, José1 martin.alanis.n@gmail.com, Vela-Huerta, Agustín1, José González-Coronado, Vidal2, Campos-Garcilazo, Virginia3
Source: Revista de la Facultad de Medicina de la UNAM. may/jun2024, Vol. 67 Issue 3, p22-31. 10p.
Abstract (English): The electrocardiographic diagnosis of acute myocardial infarction (AMI) in patients with pacemakers has always been a problem in clinical practice, causing delays in management and worse clinical outcomes. Although complete left bundle branch block (LBBB) and right ventricular pacing can produce electrocardiogram (ECG) abnormalities, specific morphological changes often allow the diagnosis of AMI or an old infarction. Case report: A 76-year-old patient with history of permanent pacemaker implantation due to a 3rd-degree atrioventricular block was admitted for chest pain. Upon admission, he was hemodynamically stable but with ECG showing pacemaker rhythm with LBBB fulfilling 2 points of Sgarbossa criteria (discordant elevation of the ST segment > 5 mm in leads V1 to V3) and ST/S ratio < -0.25 in leads V3-V4. Laboratories showed elevated troponins, integrating diagnosis of AMI, and moving on to urgent coronary angiography. A lesion on the anterior descending coronary artery was documented, and a drug-eluting stent was successfully implanted. The patient was discharged stable, asymptomatic, and with pharmacological management for secondary prevention. Conclusion: ECG identification of an AMI in patients with pacemakers is essential to initiate reperfusion therapy. Guideline recommendations are constantly changing, but an algorithm that uses hemodynamic instability and the modified Sgarbossa criteria (MSC) to decide these patients' management could be a high-sensitivity tool and allow physicians to make the best decisions without waiting for laboratory results. MSC, which are more sensitive than the original criteria, continue to be helpful in the diagnosis of AMI. Clinicians should carefully choose the appropriate MSC cut-off (ST/T Ratio -0.20 and -0.25) on a case-by-case basis. [ABSTRACT FROM AUTHOR]
Abstract (Spanish): El diagnóstico electrocardiográfico de infarto agudo de miocardio (IAM) en el paciente con marcapasos siempre ha sido un problema en la práctica clínica, provocando retrasos en el manejo y peores desenlaces clínicos. Aunque el bloqueo completo de rama izquierda (BCRI) y la estimulación del ventrículo derecho pueden producir anomalías en el electrocardiograma (ECG), cambios morfológicos específicos a menudo permiten el diagnóstico de IAM o un infarto antiguo. Reporte de caso: Paciente de 76 años con antecedente de implante de marcapasos definitivo por bloqueo auriculoventricular de 3° grado, que ingresó por dolor precordial. A su ingreso hemodinámicamente estable, pero con ECG que muestra ritmo de marcapasos con BCRI cumpliendo Sgarbossa 2 puntos (elevación discordante del segmento ST > 5 mm en derivaciones V1 a V3) y relación ST/S < -0.25 en derivaciones V3-V4. Laboratorios con elevación de troponinas, integrándose diagnóstico de IAM y pasando a angiografía coronaria urgente. Se documentó lesión en arteria coronaria descendente anterior y se implantó stent liberador de fármaco angiográficamente exitoso. Se egresó estable, asintomático y con manejo farmacológico para prevención secundaria. Conclusión: La identificación por ECG de un IAM en pacientes portadores de marcapasos es fundamental para iniciar terapia de reperfusión. Las recomendaciones de las guías cambian constantemente, pero un algoritmo que utiliza la inestabilidad hemodinámica y los criterios de Sgarbossa modificados (CSM) para decidir el manejo de estos pacientes pudiera ser una herramienta con una alta sensibilidad y permitirá a los médicos tener la mejor toma de decisiones sin esperar resultados de laboratorio. Los CSM, que son más sensibles que los criterios originales, continúan siendo útiles en el diagnóstico de IAM. Los médicos deben elegir cuidadosamente el límite de CSM apropiado (relación ST/T -0.20 y -0.25) de acuerdo con cada caso. [ABSTRACT FROM AUTHOR]
Copyright of Revista de la Facultad de Medicina de la UNAM is the property of UNAM, Facultad de Medicina and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Infarto agudo de miocardio en el paciente con marcapasos.
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  Data: Acute Myocardial Infarction in the Patient with Pacemaker.
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Mart&#237;n+Alan&#237;s-Naranjo%2C+Jos&#233;%22&quot;&gt;Mart&#237;n Alan&#237;s-Naranjo, Jos&#233;&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;i&gt; martin.alanis.n@gmail.com&lt;/i&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Vela-Huerta%2C+Agust&#237;n%22&quot;&gt;Vela-Huerta, Agust&#237;n&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Jos&#233;+Gonz&#225;lez-Coronado%2C+Vidal%22&quot;&gt;Jos&#233; Gonz&#225;lez-Coronado, Vidal&lt;/searchLink&gt;&lt;relatesTo&gt;2&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Campos-Garcilazo%2C+Virginia%22&quot;&gt;Campos-Garcilazo, Virginia&lt;/searchLink&gt;&lt;relatesTo&gt;3&lt;/relatesTo&gt;
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– Name: Abstract
  Label: Abstract (English)
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  Data: The electrocardiographic diagnosis of acute myocardial infarction (AMI) in patients with pacemakers has always been a problem in clinical practice, causing delays in management and worse clinical outcomes. Although complete left bundle branch block (LBBB) and right ventricular pacing can produce electrocardiogram (ECG) abnormalities, specific morphological changes often allow the diagnosis of AMI or an old infarction. Case report: A 76-year-old patient with history of permanent pacemaker implantation due to a 3rd-degree atrioventricular block was admitted for chest pain. Upon admission, he was hemodynamically stable but with ECG showing pacemaker rhythm with LBBB fulfilling 2 points of Sgarbossa criteria (discordant elevation of the ST segment &gt; 5 mm in leads V1 to V3) and ST/S ratio &lt; -0.25 in leads V3-V4. Laboratories showed elevated troponins, integrating diagnosis of AMI, and moving on to urgent coronary angiography. A lesion on the anterior descending coronary artery was documented, and a drug-eluting stent was successfully implanted. The patient was discharged stable, asymptomatic, and with pharmacological management for secondary prevention. Conclusion: ECG identification of an AMI in patients with pacemakers is essential to initiate reperfusion therapy. Guideline recommendations are constantly changing, but an algorithm that uses hemodynamic instability and the modified Sgarbossa criteria (MSC) to decide these patients&#39; management could be a high-sensitivity tool and allow physicians to make the best decisions without waiting for laboratory results. MSC, which are more sensitive than the original criteria, continue to be helpful in the diagnosis of AMI. Clinicians should carefully choose the appropriate MSC cut-off (ST/T Ratio -0.20 and -0.25) on a case-by-case basis. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (Spanish)
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  Data: El diagn&#243;stico electrocardiogr&#225;fico de infarto agudo de miocardio (IAM) en el paciente con marcapasos siempre ha sido un problema en la pr&#225;ctica cl&#237;nica, provocando retrasos en el manejo y peores desenlaces cl&#237;nicos. Aunque el bloqueo completo de rama izquierda (BCRI) y la estimulaci&#243;n del ventr&#237;culo derecho pueden producir anomal&#237;as en el electrocardiograma (ECG), cambios morfol&#243;gicos espec&#237;ficos a menudo permiten el diagn&#243;stico de IAM o un infarto antiguo. Reporte de caso: Paciente de 76 a&#241;os con antecedente de implante de marcapasos definitivo por bloqueo auriculoventricular de 3&#176; grado, que ingres&#243; por dolor precordial. A su ingreso hemodin&#225;micamente estable, pero con ECG que muestra ritmo de marcapasos con BCRI cumpliendo Sgarbossa 2 puntos (elevaci&#243;n discordante del segmento ST &gt; 5 mm en derivaciones V1 a V3) y relaci&#243;n ST/S &lt; -0.25 en derivaciones V3-V4. Laboratorios con elevaci&#243;n de troponinas, integr&#225;ndose diagn&#243;stico de IAM y pasando a angiograf&#237;a coronaria urgente. Se document&#243; lesi&#243;n en arteria coronaria descendente anterior y se implant&#243; stent liberador de f&#225;rmaco angiogr&#225;ficamente exitoso. Se egres&#243; estable, asintom&#225;tico y con manejo farmacol&#243;gico para prevenci&#243;n secundaria. Conclusi&#243;n: La identificaci&#243;n por ECG de un IAM en pacientes portadores de marcapasos es fundamental para iniciar terapia de reperfusi&#243;n. Las recomendaciones de las gu&#237;as cambian constantemente, pero un algoritmo que utiliza la inestabilidad hemodin&#225;mica y los criterios de Sgarbossa modificados (CSM) para decidir el manejo de estos pacientes pudiera ser una herramienta con una alta sensibilidad y permitir&#225; a los m&#233;dicos tener la mejor toma de decisiones sin esperar resultados de laboratorio. Los CSM, que son m&#225;s sensibles que los criterios originales, contin&#250;an siendo &#250;tiles en el diagn&#243;stico de IAM. Los m&#233;dicos deben elegir cuidadosamente el l&#237;mite de CSM apropiado (relaci&#243;n ST/T -0.20 y -0.25) de acuerdo con cada caso. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Revista de la Facultad de Medicina de la UNAM is the property of UNAM, Facultad de Medicina and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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        Value: 10.22201/fm.24484865e.2024.67.3.03
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              Text: may/jun2024
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