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Evaluation of left atrial contraction contribution to left ventricular filling using cardiovascular magnetic resonance
Author(s) -
Alhogbani Tariq,
Strohm Oliver,
Friedrich Matthias G.
Publication year - 2013
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.23881
Subject(s) - medicine , cardiology , magnetic resonance imaging , stroke volume , contraction (grammar) , nuclear medicine , radiology , ejection fraction , heart failure
Purpose: To describe a new method to quantify the left atrial contraction contribution (ACC) to left ventricular (LV) filling using cardiovascular magnetic resonance (CMR). Materials and Methods: We assessed 120 normal subjects (50% female) using steady‐state free precession CMR volumetry. Volumes measurements were performed using short axis and rotational long axis views. The percentage of ACC was calculated by dividing the LV filling volume resulting from left atrial (LA) contraction by the LV stroke volume (LVSV). Results: The described method was well reproducible. The ACC in normal subjects was 15 ± 5% for ages <40 years, 28 ± 8% for ages 40 to 55 years, and 38 ± 5% for ages >55 years. When adjusted for age, ie, dividing the ACC percentage by age, a value between 0.4 and 0.7 was found to represent the normal range of ACC at any age. Conclusion: The study presents a new and accurate CMR volumetric method to quantify ACC to LV filling. ACC ranges from 10%–40%, depending on age. J. Magn. Reson. Imaging 2013;37:860–864. © 2012 Wiley Periodicals, Inc.