For citations:

Evdokimova L.S., Itskovich I.E., Shakhbazyan A.V. Dark papillary muscles sign in a patient with arrhythmogenic mitral valve prolapse: a case report. Russian Journal of Cardiology. 2025;30(5S):6292. (In Russ.) https://doi.org/10.15829/1560-4071-2025-6292. EDN: SQRFGT