Details of left ventricular radial wall motion supporting the ventricular theory of the third heart sound obtained by cardiac MR.

Codreanu, I; Robson, M D; Rider, O J; Pegg, T J; Dasanu, C A; Jung, Bernd; Rotaru, N; Clarke, K; Holloway, C J (2014). Details of left ventricular radial wall motion supporting the ventricular theory of the third heart sound obtained by cardiac MR. British journal of radiology, 87(1037), p. 20130780. British Institute of Radiology 10.1259/bjr.20130780

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OBJECTIVE Obtaining new details of radial motion of left ventricular (LV) segments using velocity-encoding cardiac MRI. METHODS Cardiac MR examinations were performed on 14 healthy volunteers aged between 19 and 26 years. Cine images for navigator-gated phase contrast velocity mapping were acquired using a black blood segmented κ-space spoiled gradient echo sequence with a temporal resolution of 13.8 ms. Peak systolic and diastolic radial velocities as well as radial velocity curves were obtained for 16 ventricular segments. RESULTS Significant differences among peak radial velocities of basal and mid-ventricular segments have been recorded. Particular patterns of segmental radial velocity curves were also noted. An additional wave of outward radial movement during the phase of rapid ventricular filling, corresponding to the expected timing of the third heart sound, appeared of particular interest. CONCLUSION The technique has allowed visualization of new details of LV radial wall motion. In particular, higher peak systolic radial velocities of anterior and inferior segments are suggestive of a relatively higher dynamics of anteroposterior vs lateral radial motion in systole. Specific patterns of radial motion of other LV segments may provide additional insights into LV mechanics. ADVANCES IN KNOWLEDGE The outward radial movement of LV segments impacted by the blood flow during rapid ventricular filling provides a potential substrate for the third heart sound. A biphasic radial expansion of the basal anteroseptal segment in early diastole is likely to be related to the simultaneous longitudinal LV displacement by the stretched great vessels following repolarization and their close apposition to this segment.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic, Interventional and Paediatric Radiology

UniBE Contributor:

Jung, Bernd

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0007-1285

Publisher:

British Institute of Radiology

Language:

English

Submitter:

Aisha Stefania Mzinga

Date Deposited:

19 Jun 2015 10:42

Last Modified:

26 Jun 2016 02:05

Publisher DOI:

10.1259/bjr.20130780

PubMed ID:

24641347

BORIS DOI:

10.7892/boris.69658

URI:

https://boris.unibe.ch/id/eprint/69658

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