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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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Heart Failure IV: Classification and Diagnostic Evaluation01:30

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Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
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Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

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The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...
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Acute Coronary Syndrome I: Introduction01:30

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Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
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Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
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Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
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Video Experimental Relacionado

Updated: Sep 10, 2025

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Índice de acoplamiento atrioventricular: un nuevo enfoque para la estratificación del riesgo de eventos

Jing-Ping Wu1, Yun Zhao1, Xing-Yu Gu1

  • 1Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.

Journal of magnetic resonance imaging : JMRI
|August 20, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Los índices de acoplamiento atrioventricular izquierdo y derecho (LACI y RACI) predicen independientemente eventos cardíacos adversos importantes en pacientes con infarto agudo de miocardio (AMI), mejorando la estratificación del riesgo más allá de los factores tradicionales.

Palabras clave:
Infarto agudo del miocardioíndice de acoplamiento auriculoventricularacontecimientos adversos cardíacos importantesInfarto del miocardio ventricular derecho

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Área de la Ciencia:

  • Cardiología
  • Imágenes médicas
  • Pronóstico

Sus antecedentes:

  • Se establece el valor pronóstico del índice de acoplamiento atrioventricular izquierdo (LACI) en el infarto agudo de miocardio (AMI).
  • El papel pronóstico del índice de acoplamiento atrioventricular derecho (RACI) en la IAM sigue siendo menos conocido.

Objetivo del estudio:

  • Investigar el pronóstico significativo tanto de LACI como de RACI en pacientes después de IAM.
  • Determinar si estos índices ofrecen un valor pronóstico incremental más allá de los factores de riesgo convencionales.

Principales métodos:

  • Un análisis retrospectivo de 1083 pacientes con IAM de elevación ST que se sometieron a resonancia magnética cardíaca dentro de los 7 días posteriores a la intervención coronaria percutánea.
  • El LACI y el RACI se calcularon a partir de los volúmenes diastólicos finales auriculares y ventriculares indexados por resonancia magnética.
  • Los eventos cardíacos adversos mayores (MACE), incluida la muerte por todas las causas, el reinfarto y la hospitalización por insuficiencia cardíaca, fueron seguidos durante una mediana de 38 meses.

Principales resultados:

  • Tanto el LACI como el RACI se asociaron de forma independiente con el MACE en pacientes con IAM.
  • La adición de LACI y/o RACI mejoró significativamente el poder predictivo del modelo pronóstico (el índice C de Harrell aumentó de 0,679 a 0,762).
  • En pacientes con infarto del miocardio ventricular derecho (IVMR), el RACI demostró un mejor pronóstico en comparación con el LACI.

Conclusiones:

  • LACI y RACI son predictores independientes de la MACE en la IAM.
  • Estos índices proporcionan información prognóstica incremental valiosa, mejorando la evaluación de riesgos más allá de los factores tradicionales.
  • RACI puede ser particularmente importante para el pronóstico en pacientes con RVMI.