Comparative analysis of cardiac mechano-energetics in isolated hearts supported by pulsatile or rotary blood pumps

被引：5

作者：

Granegger, Marcus ^{[1
,2
,3
]}

Choi, Young ^{[1
,2
]}

Locher, Benedikt ^{[1
,2
]}

Aigner, Philipp ^{[4
,5
]}

Hubmann, Emanuel J. ^{[1
,2
]}

Lemme, Frithjof ^{[1
,2
]}

Cesarovic, N. Ikola ^{[6
]}

Huebler, Michael ^{[1
,2
]}

Schweiger, Martin ^{[1
,2
]}

机构：

[1] Univ Childrens Hosp Zurich, Pediat Heart Ctr, Dept Surg, Pediat Cardiovasc Surg, Zurich, Switzerland

[2] Univ Childrens Hosp Zurich, Childrens Res Ctr, Zurich, Switzerland

[3] Charite Univ Med Berlin, Inst Imaging Sci & Computat Modelling Cardiovasc, Biofluid Mech Lab, Berlin, Germany

[4] Med Univ Vienna, Ctr Med Phys & Biomed Engn, Vienna, Austria

[5] Ludwig Boltzmann Inst Cardiovasc Res, Vienna, Austria

[6] Univ Zurich, Univ Hosp Zurich, Dept Surg, Div Surg Res, Zurich, Switzerland

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

关键词：

MYOCARDIAL RECOVERY; CIRCULATORY SUPPORT; FAILING HEART; ASSIST; EFFICIENCY; IMPACT; VOLUME;

D O I：

10.1038/s41598-019-56344-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The previously more frequently implanted pulsatile blood pumps (PBPs) showed higher recovery rates than the currently preferred rotary blood pumps (RBPs), with unclear causality. The aim of this study was to comparatively assess the capability of PBPs and RPBs to unload the left ventricle and maintain cardiac energetics as a possible implication for recovery. An RBP and a heartbeat synchronized PBP were alternately connected to isolated porcine hearts. Rotational speed of RBPs was set to different support levels. For PBP support, the start of ejection was phased to different points during the cardiac cycle, prescribed as percentage delays from 0% to 90%. Cardiac efficiency, quantified by the ratio of external work over myocardial oxygen consumption, was determined. For RBP support, higher degrees of RBP support correlated with lower left atrial pressures (LAP) and lower cardiac efficiency (r = 0.91 +/- 0.12). In contrast, depending on the phase delay of a PBP, LAP and cardiac efficiency exhibited a sinusoidal relationship with the LAP minimum at 90% and efficiency maximum at 60%. Phasing of a PBP offers the possibility to maintain a high cardiac efficiency and simultaneously unload the ventricle. These results warrant future studies investigating whether optimized cardiac energetics promotes functional recovery with LVAD therapy.

引用

页数：9