The rotation axis of the left ventricle: a new concept derived from ultrasound data in healthy individuals

The rotation axis of the left ventricle : a new concept derived from ultrasound data in healthy individuals

Larsson, M (author): School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden

Bjällmark, A (author): School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden

Brodin, LA (author): School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden

(creator_code:org_t)

Abstract Subject headings

Introduction: The axis around which the left ventricle (LV) rotates has never previously been described. The aim was to develop a method to calculate the spatial motion of the rotation axis throughout the cardiac cycle. Method: By constructing a model of the LV, based on dimensions and rotation values at the basal, mid ventricular and apical levels, a rotation axis could be calculated at each level in 39 healthy subjects. The transition plane, defined as the level without rotation, where basal and apical rotation meet was also calculated. Results: The rotation axis was not congruent to the longitudinal axis of the LV at any time point. A significant and specific mean direction for each of the rotation axes for the majority of the tested time points displayed a physiological pattern. Conclusion: This new method introduces a new concept in cardiac function and provides further insight into the complexity of LV mechanics.

By the author/editor: Gustafsson, Ulf, ...; Larsson, M; Bjällmark, A; Lindqvist, Per; Brodin, LA; Waldenström, And ...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Cardiac and Card ...

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