Tariq Alhogbani1, Oliver Strohm, Matthias G Friedrich. 1. Stephenson Cardiovascular MR Centre at the Libin Cardiovascular Institute of Alberta, Department of Cardiac Sciences, University of Calgary, Calgary, Alberta, Canada. tariqmfh@yahoo.com
Abstract
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.
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.
Authors: Petr Neuzil; Béla Merkely; Andrejs Erglis; Germanas Marinskis; Joris R de Groot; Herwig Schmidinger; Manuel Rodriguez Venegas; Michiel Voskuil; Thomas Sturmberger; Jan Petru; Niels Jongejan; Josef Aichinger; Ginta Kamzola; Audrius Aidietis; Laszlo Gellér; Tomas Mraz; Istvan Osztheimer; Yuval Mika; Steven Evans; Daniel Burkhoff; Karl-Heinz Kuck Journal: J Am Heart Assoc Date: 2017-12-23 Impact factor: 5.501
Authors: Ana Jorbenadze; Marat Fudim; Felix Mahfoud; Phillip B Adamson; Tarek Bekfani; Rolf Wachter; Horst Sievert; Piotr P Ponikowski; John G F Cleland; Stefan D Anker Journal: ESC Heart Fail Date: 2021-05-18