TY - JOUR
T1 - Investigating the importance of left atrial compliance on fluid dynamics in a novel mock circulatory loop
AU - Meskin, Masoud
AU - Starkey, Philip Alexander
AU - Kaspersen, Alexander Emil
AU - Ringgaard, Steffen
AU - Sand, Signe Gram
AU - Nygaard, Jens Vinge
AU - Jensen, Jørgen Arendt
AU - Traberg, Marie Sand
AU - Johansen, Peter
N1 - © 2024. The Author(s).
PY - 2024/1/22
Y1 - 2024/1/22
N2 - The left atrium (LA) hemodynamic indices hold prognostic value in various cardiac diseases and disorders. To understand the mechanisms of these conditions and to assess the performance of cardiac devices and interventions, in vitro models can be used to replicate the complex physiological interplay between the pulmonary veins, LA, and left ventricle. In this study, a comprehensive and adaptable in vitro model was created. The model includes a flexible LA made from silicone and allows distinct control over the systolic and diastolic functions of both the LA and left ventricle. The LA was mechanically matched with porcine LAs through expansion tests. Fluid dynamic measures were validated against the literature and pulmonary venous flows recorded on five healthy individuals using magnetic resonance flow imaging. Furthermore, the fluid dynamic measures were also used to construct LA pressure-volume loops. The in vitro pressure and flow recordings expressed a high resemblance to physiological waveforms. By decreasing the compliance of the LA, the model behaved realistically, elevating the a- and v-wave peaks of the LA pressure from 12 to 19 mmHg and 22 to 26 mmHg, respectively, while reducing the S/D ratio of the pulmonary venous flowrate from 1.5 to 0.3. This model provides a realistic platform and framework for developing and evaluating left heart procedures and interventions.
AB - The left atrium (LA) hemodynamic indices hold prognostic value in various cardiac diseases and disorders. To understand the mechanisms of these conditions and to assess the performance of cardiac devices and interventions, in vitro models can be used to replicate the complex physiological interplay between the pulmonary veins, LA, and left ventricle. In this study, a comprehensive and adaptable in vitro model was created. The model includes a flexible LA made from silicone and allows distinct control over the systolic and diastolic functions of both the LA and left ventricle. The LA was mechanically matched with porcine LAs through expansion tests. Fluid dynamic measures were validated against the literature and pulmonary venous flows recorded on five healthy individuals using magnetic resonance flow imaging. Furthermore, the fluid dynamic measures were also used to construct LA pressure-volume loops. The in vitro pressure and flow recordings expressed a high resemblance to physiological waveforms. By decreasing the compliance of the LA, the model behaved realistically, elevating the a- and v-wave peaks of the LA pressure from 12 to 19 mmHg and 22 to 26 mmHg, respectively, while reducing the S/D ratio of the pulmonary venous flowrate from 1.5 to 0.3. This model provides a realistic platform and framework for developing and evaluating left heart procedures and interventions.
UR - http://www.scopus.com/inward/record.url?scp=85182833979&partnerID=8YFLogxK
U2 - 10.1038/s41598-024-52327-6
DO - 10.1038/s41598-024-52327-6
M3 - Journal article
C2 - 38253772
SN - 2045-2322
VL - 14
SP - 1864
JO - Scientific Reports
JF - Scientific Reports
IS - 1
M1 - 1864
ER -