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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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Placas vulnerables no culpables y pronóstico en infarto de miocardio con versus sin elevación del segmento ST: un

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Las placas de alto riesgo fueron igualmente frecuentes en pacientes con infarto de miocardio de elevación ST (STEMI) y no STEMI (NSTEMI). Los resultados de las lesiones no culpables no tratadas también fueron comparables, lo que sugiere estrategias de revascularización similares para ambos grupos de pacientes.

Palabras clave:
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Área de la Ciencia:

  • Cardiología
  • Cardiología intervencionista
  • Biología vascular

Sus antecedentes:

  • Las directrices clínicas difieren en cuanto a la revascularización de las lesiones no culpables en el infarto de miocardio de elevación ST (STEMI) frente a las no STEMI (NSTEMI).
  • No se comprende bien la prevalencia de placas vulnerables de alto riesgo y su impacto en los resultados en STEMI frente a NSTEMI.

Objetivo del estudio:

  • Comparar la prevalencia de placas vulnerables de alto riesgo no tratadas en lesiones no culpables entre pacientes con STEMI y NSTEMI.
  • Evaluar los resultados a largo plazo asociados con estas lesiones no culpables en ambos grupos de pacientes.

Principales métodos:

  • El estudio PROSPECT II incluyó a 898 pacientes con infarto de miocardio reciente sometidos a angiografía de 3 vasos.
  • La espectroscopia de infrarrojo cercano y el ultrasonido intravascular identificaron dos características de las placas de alto riesgo (carga de placa ≥70% y índice de carga de núcleo lipídico ≥324.7).
  • Los eventos adversos cardiovasculares mayores (EACM) de lesiones no culpables no tratadas fueron seguidos durante una mediana de 3,7 años.

Principales resultados:

  • La prevalencia de placas de alto riesgo de dos características en el nivel de la lesión fue ligeramente mayor en STEMI (12,8%) frente a NSTEMI (10,1%), pero similar a nivel del paciente (38,8% frente a 32,7%).
  • La prevalencia de placas que cumplen al menos un criterio de alto riesgo también fue similar entre los grupos de STEMI y NSTEMI.
  • Las tasas a cuatro años de MACE no culpables (8,6% frente a 7,8%) y todas las MACE (14,2% frente a 13,0%) fueron comparables entre los pacientes con STEMI y NSTEMI.

Conclusiones:

  • La prevalencia por paciente de placas vulnerables de alto riesgo es comparable en STEMI y NSTEMI.
  • La incidencia a largo plazo de eventos cardiovasculares adversos importantes derivados de lesiones no culpables es similar tanto en STEMI como en NSTEMI.
  • Estos hallazgos apoyan una estrategia de revascularización similar para las lesiones no culpables en pacientes con STEMI y NSTEMI después del tratamiento de la lesión culpable.