Helical structure of the ventricular myocardium. A narrative review of cardiac mechanics.

Autor: Antúnez-Montes OY; Emergency Department, Balbuena General Hospital, Secretary of Health, Mexico City, Mexico., Kocica MJ; UC Clinical Center of Serbia, Clinic for Cardiac Surgery, Belgrade, Serbia., Olavarria AS; University of Carabobo, Perinatal Medicine and Fetal Echocardiography, Venezuela., Corno AF; Children's Heart Institute, Memorial Hermann Children's Hospital, McGovern Medical School, UTHealth in Houston, Texas, USA., Millan RA; Echocardiography Section, November 20 National Medical Center, ISSSTE, Mexico City, Mexico., Rosales CI; Echocardiography Section, November 20 National Medical Center, ISSSTE, Mexico City, Mexico., Sanchez Aparicio HE; Emergency Department, Balbuena General Hospital, Secretary of Health, Mexico City, Mexico.
Jazyk: angličtina
Zdroj: Echocardiography (Mount Kisco, N.Y.) [Echocardiography] 2023 Mar; Vol. 40 (3), pp. 161-173. Date of Electronic Publication: 2023 Jan 06.
DOI: 10.1111/echo.15515
Abstrakt: To date, the ventricular myocardial band is the anatomical-functional model that best explains cardiac mechanics during systolic-diastolic phenomena in the cardiac cycle. The implications of the model fundamentally affect the anatomical interpretation of the ventricular myocardium, giving meaning to the direction that muscle fibers take, turning them into an object of study with potential clinical, imaging, and surgical applications. Re-interpreting the anatomy of the ventricular muscle justifies changes in the physiological interpretation, from its functional focus as a fiber unraveling the mechanical phenomena carried out during systole and diastole. We identify the functioning of the heart from the electrical and hemodynamic point of view, but it is necessary to delve into the mechanics that originate the hemodynamic changes observed flowmetrically, and that manifested during the pathology. In this review, the mechanical phenomena that the myocardium performs in each phase of the cardiac cycle are broken down in detail, emphasizing the physical displacements that each of the muscle segments presents, as well as a vision of their alteration and in which pathologies they are mainly identified. Visually, an anatomical correlation to the echocardiogram is provided, pointing out the direction of the segmental myocardial displacement by the strain velocity vector technique.
(© 2022 The Authors. Echocardiography published by Wiley Periodicals LLC.)
Databáze: MEDLINE
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