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.