title: Evaluation of cardiac function based on ventricular pressure-volume relationships during assistance with a rotary blood pump.
abstract: Nowadays, a rotary blood pump can be used as not only for a bridge to transplantation (BTT) but also for a bridge to recovery (BTR) and a destination therapy (DT). In such cases, evaluation of the recovery level of the native heart provides useful information to improve the clinical strategy and decide adequate timing for removing of the RBP. In contrast, the indices for cardiac function have been studied. However, most of them do not consider the assistance with the RBP. In this study, we aimed at evaluating whether Emax, which is an index for cardiac function based on the pressure-volume relationships, is still valid during assistance with the RBP from an animal experiment. In the acute animal experiment with an adult goat, we measured pressure-volume (P-V) loops while cardiac function was normal, augmented or diminished. The experimental results revealed that there were typical differences in the shapes of P-V loops when the cardiac function was altered, and Emax can still be used as an index for the cardiac function even if the assistance with the RBP is ongoing.
authors.affiliation: Graduate School of Engineering, Tohoku University, Aramaki, Sendai, Japan. ogawa@yoshizawa.ecei.tohoku.ac.jp
authors.forename: Daisuke
authors.initials: D
authors.lastname: Ogawa
authors.forename: Akira
authors.initials: A
authors.lastname: Tanaka
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Abe
authors.forename: Paul
authors.initials: P
authors.lastname: Olegario
authors.forename: Koichiro
authors.initials: K
authors.lastname: Kasahara
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Shiraishi
authors.forename: Kazumitsu
authors.initials: K
authors.lastname: Sekine
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yambe
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Nitta
authors.forename: Makoto
authors.initials: M
authors.lastname: Yoshizawa
mesh_terms: D000818:Animals; D001243:Assisted Circulation / Q000295:instrumentation* / Q000379:methods; D001794:Blood Pressure; D002302:Cardiac Output; D002306:Cardiac Volume; D002320:Cardiovascular Physiological Phenomena; D005260:Female; D006041:Goats; D006321:Heart / Q000033:anatomy & histology; D006353:Heart-Assist Devices; D008962:Models, Theoretical; D015203:Reproducibility of Results; D016277:Ventricular Function, Left; D017725:Ventricular Pressure