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• W3107434503 abstract "Disjunction of the mitral valve annulus is a structural abnormality consisting of an atrial displacement of the articulation point of the mitral valve, leading to an altered spatial relationship between the valve and the adjacent posterior ventricular wall. Studies have shown the relationship between mitral annular disjunction, ventricular arrhythmias, and myocardial fibrous degeneration, which increases the risk of sudden death, especially among young women. The case of a 30-year-old woman with no relevant pathological history with frequent palpitations is presented, in whom an increase in ventricular automatism with a progressive increase in the arrhythmic load of up to 20% with a weight of pharmacological management is documented. In a cardiac magnetic resonance, a 15 mm displacement towards the atrium of the mitral leaflets compatible with mitral annular disjunction and late enhancement foci of mesocardial, non-coronary distribution were observed. Given the findings and the persistence of symptoms, an electrophysiological study, 3D mapping, and ablation were performed. Two hyperechoic regions were seen on intracardiac ultrasound, one in the length of the anterior papillary muscle and the other in the mesocardium of the base of the posterior papillary muscle. Both foci related to the morphological sites of interest in which radiofrequency energy was applied. During the procedure presented an episode of ventricular fibrillation. A malignant ventricular extrasystole was considered and therefore a cardio defibrillator was implanted for the secondary prevention of sudden death. The literature was reviewed and the specific pathophysiological relationships between mitral annular disjunction, premature ventricular complexes, and risk of sudden death were analyzed. The role of electrophysiological study and ablation in symptomatic patients refractory to pharmacological treatment is described.La disyunción del anillo valvular mitral es una anormalidad estructural que consiste en un desplazamiento auricular del punto de articulación de la válvula mitral, lo que lleva a una relación espacial alterada entre la válvula y la pared ventricular posterior adyacente. Los estudios han demostrado una relación entre la disyunción del anillo mitral, las arritmias ventriculares y la degeneración fibrosa miocárdica, lo que incrementa el riesgo de muerte súbita, en especial en mujeres jóvenes. Se presenta el caso de una mujer de 30 años, sin antecedentes relevantes, con palpitaciones frecuentes, en quien se documentó un aumento del automatismo ventricular con incremento progresivo de la carga arrítmica hasta el 20% a pesar del manejo farmacológico. En la resonancia cardiaca se apreció un desplazamiento de 15 mm hacia la aurícula de las valvas de la mitral compatible con disyunción del anillo mitral, además de focos de realce tardío de distribución mesocárdica, no coronariana. Ante los hallazgos y la persistencia de los síntomas, se llevó a estudio electrofisiológico, mapeo 3D y ablación. En la ecografía intracardiaca se apreciaron dos regiones hiperecoicas, en la longitud del músculo papilar anterior y en el mesocardio de la base del músculo papilar posterior; ambos focos relacionados con los sitios morfológicos de interés, en los cuales se aplicó energía de radiofrecuencia. Durante el procedimiento presentó un episodio de fibrilación ventricular que se consideró una extrasistolia ventricular maligna, por lo que se implantó un cardiodesfibrilador para prevención de muerte súbita. Se revisa la literatura y se analizan las relaciones fisiopatológicas existentes entre la disyunción del anillo mitral, los complejos ventriculares prematuros y el riesgo de muerte súbita." @default.
• W3107434503 created "2020-12-07" @default.
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• W3107434503 date "2021-07-28" @default.
• W3107434503 modified "2023-10-05" @default.
• W3107434503 title "Disyunción del anillo mitral como marcador de riesgo en prolapso de válvula mitral" @default.
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• W3107434503 doi "https://doi.org/10.24875/acm.200003661" @default.
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