HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Personal Folders Download to citation manager Author home page(s): Bernd Jung Permission Requests Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Jung, B. Articles by Hennig, J. Search for Related Content PubMed PubMed Citation Articles by Jung, B. Articles by Hennig, J. Related Collections Cardiac - physiology Cardiac - other

Eur J Cardiothorac Surg 2006;29:S150-S157
© 2006 Elsevier Science NL

Investigating myocardial motion by MRI using tissue phase mapping

^a Department of Diagnostic Radiology, Medical Physics, University Hospital, Freiburg University, Hugstetterstr.55, 79106 Freiburg, Germany
^b Department of Cardiology, University Hospital, Freiburg, Germany

Received 22 February 2006; accepted 27 February 2006.

^_* Corresponding author. Tel.: +49 761 270 7393; fax: +49 761 270 3831. (Email: bernd.jung{at}uniklinik-freiburg.de).

Objective: Velocity-encoded phase contrast magnetic resonance imaging (MRI) provides a tool to quantify regional myocardial wall motion of the entire heart. It allows the acquisition of three-directional velocity vector fields with high spatial resolution that reflect the temporal evolution of myocardial velocities over the cardiac cycle. In contrast to other imaging modalities such as echocardiography left ventricular performance can be assessed without limited anatomical or functional coverage. Methods: Compared to other techniques that quantify local myocardial contractility (e.g. implanted ultrasonic crystals) by means of regional displacement, phase contrast MRI provides information about local and global left ventricular velocities (i.e. motion) by utilizing the intrinsic motion sensitivity of MRI. The resultant motion components of contraction, expansion, rotation, lengthening, and shortening of the left ventricle are described in high spatial and temporal detail. Phase contrast measurements were performed in 12 healthy volunteers with a respiratory-gated technique in order to achieve a high temporal resolution of 13.8 ms to demonstrate the detailed assessment of global and regional myocardial motion. Results: Data revealed details in left ventricular motion patterns that were previously not seen in phase contrast measurements and are only known from echocardiography. For all volunteers, characteristic myocardial motion patterns and locally different radial (i.e. contraction and expansion), rotational (i.e. twisting and untwisting) and longitudinal (i.e. lengthening and shortening) motion components could be detected with high accuracy. Conclusions: The phase contrast MRI technique for high temporal resolution velocity mapping is therefore very promising for the investigation and better understanding of the myocardial motion in normal subjects and patients with disturbed left ventricular performance and may validate further testing of different models of cardiac structure.

Key Words: Magnetic resonance imaging • Tissue phase mapping • Sequential cardiac motion • Helical ventricular myocardial band

This article has been cited by other articles:

				G. Buckberg, J. I.E. Hoffman, A. Mahajan, S. Saleh, and C. Coghlan Cardiac Mechanics Revisited: The Relationship of Cardiac Architecture to Ventricular Function Circulation, December 9, 2008; 118(24): 2571 - 2587. [Abstract] [Full Text] [PDF]

				G. Buckberg, A. Mahajan, S. Saleh, J. I.E. Hoffman, and C. Coghlan Structure and function relationships of the helical ventricular myocardial band J. Thorac. Cardiovasc. Surg., September 1, 2008; 136(3): 578 - 589. [Abstract] [Full Text] [PDF]

				S. De Castro, F. Faletra, E. Di Angelantonio, C. Conca, A. Marcantonio, M. Francone, D. Cartoni, F. Mirabelli, C. Gaudio, S. Caselli, et al. Tomographic Left Ventricular Volumetric Emptying Analysis by Real-Time 3-Dimensional Echocardiography: Influence of Left Ventricular Dysfunction With and Without Electrical Dyssynchrony Circ Cardiovasc Imaging, July 1, 2008; 1(1): 41 - 49. [Abstract] [Full Text] [PDF]

				P. P. Sengupta, A. J. Tajik, K. Chandrasekaran, and B. K. Khandheria Twist mechanics of the left ventricle principles and application. J. Am. Coll. Cardiol. Img., May 1, 2008; 1(3): 366 - 376. [Abstract] [Full Text] [PDF]

				G. D. Buckberg, M. Castella, M. Gharib, and S. Saleh Active myocyte shortening during the 'isovolumetric relaxation' phase of diastole is responsible for ventricular suction; 'systolic ventricular filling' Eur. J. Cardiothorac. Surg., April 1, 2006; 29(Suppl_1): S98 - S106. [Abstract] [Full Text] [PDF]

				G. D. Buckberg, H. Schelbert, and A. Mahajan Cardiac motion and fiber shortening: the whole and its parts Eur. J. Cardiothorac. Surg., April 1, 2006; 29(Suppl_1): S145 - S149. [Abstract] [Full Text] [PDF]

				G. D. Buckberg, A. Mahajan, B. Jung, M. Markl, J. Hennig, and M. Ballester-Rodes MRI myocardial motion and fiber tracking: a confirmation of knowledge from different imaging modalities Eur. J. Cardiothorac. Surg., April 1, 2006; 29(Suppl_1): S165 - S177. [Abstract] [Full Text] [PDF]