Conclusions.
Cardiac mechanics have been scrutinized in detail, with the available knowledge of the spatial distribution of myocardial fibers to understand their functional repercussion, for this, the dissection technique, or the use of didactic models, contributes to its understanding, the helical myocardial band model is the hallmark to explaining its function. The process of isovolumetric contraction shortens the BL and forms a rigid shell that allows the first clockwise rotation and initial elongation of the LV. During ejection, torque is generated by the initial activation of the DS, and shortly after the AS, the DS ends its contraction at the end of the ejection, the isovolumetric relaxation period is a contractile phenomenon where the AS is contracting. Diastolic dysfunction implies understanding the mechanical phenomena of prolonged torsion and altered detorsion, the period between the end of the contraction of the DS and the AS are key to understanding the mechanical genesis of diastolic dysfunction. In the absence of any better and more reliable model, Francisco Torrent-Guasp’s ventricular myocardial band remains the best anatomical model explaining the relationships between heart structure and function.