Effect of Fibre Orientation Optimisation in an Electromechanical Model of Left Ventricular Contraction in Rat

2013 ◽  
pp. 46-53 ◽  
Author(s):  
Valentina Carapella ◽  
Rafel Bordas ◽  
Pras Pathmanathan ◽  
Jurgen E. Schneider ◽  
Peter Kohl ◽  
...  
Keyword(s):  
Fibre Orientation ◽  
Left Ventricular ◽  
Ventricular Contraction ◽  
Electromechanical Model

Direct Intramyocardial Ethanol Injection for Premature Ventricular Contraction Arising From the Inaccessible Left Ventricular Summit

2021 ◽  
Author(s):  
Gurukripa N. Kowlgi ◽  
Arman Arghami ◽  
Juan A. Crestanello ◽  
Christopher J. François ◽  
Paul A. Friedman ◽  
...  
Keyword(s):  
Premature Ventricular Contraction ◽  
Left Ventricular ◽  
Ventricular Contraction ◽  
Ethanol Injection

Geometrical models of left ventricular contraction from MRI of the normal and spontaneously hypertensive rat heart

1999 ◽  
Vol 44 (10) ◽  
pp. 2657-2676 ◽  
Author(s):  
Richard G Wise ◽  
Christopher L-H Huang ◽  
Ahmed I M Al-Shafei ◽  
T Adrian Carpenter ◽  
Laurance D Hall
Keyword(s):  
Rat Heart ◽  
Spontaneously Hypertensive Rat ◽  
Left Ventricular ◽  
Ventricular Contraction ◽  
Spontaneously Hypertensive ◽  
Hypertensive Rat

scholarly journals Usefulness of right ventricular contraction pressure index to predict short-term mortality and right heart failure in patients who underwent continuous-flow left ventricular assist device implantation

2019 ◽  
Vol 43 (1) ◽  
pp. 25-36 ◽  
Author(s):  
Koray Kalenderoğlu ◽  
Tolga Sinan Güvenç ◽  
Müge Taşdemir Mete ◽  
Hüseyin Kuplay ◽  
Semra Ağustos ◽  
...  
Keyword(s):  
Heart Failure ◽  
Right Ventricular ◽  
Right Heart Failure ◽  
Left Ventricular ◽  
Ventricular Contraction ◽  
Short Term ◽  
Right Heart ◽  
Ventricular Assist ◽  
Pressure Index ◽  
Short Term Mortality

Background: Right ventricular stroke work index is a useful but invasively measured parameter that can be used to predict right heart failure following continuous-flow left ventricular assist device implantation. Right ventricular contraction pressure index is a novel parameter that was developed to measure right ventricular stroke work index with echocardiography. We aimed to investigate the clinical usefulness of right ventricular contraction pressure index to predict short-term mortality and right heart failure in patients who underwent continuous-flow left ventricular assist device implantation. Methods: A total of 49 patients who participated in institutional advanced heart failure registry and underwent continuous-flow left ventricular assist device implantation with a bridge-to-candidacy indication were analyzed retrospectively. Right ventricular contraction pressure index was calculated using offline measurements. Demographic, clinical and outcome data were obtained from the registry data. Patients were grouped according to right ventricular contraction pressure index quartiles. Results: Patients within the lowest right ventricular contraction pressure index quartile had a trend toward higher short-term mortality (46.2%, p = 0.056) and combined short-term mortality and definitive right heart failure (53.8%, p = 0.054) at 15th day postoperatively. Similarly, short-term survival or survival free of definite right heart failure were significantly lower in the lowest right ventricular contraction pressure index quartile (log-rank p = 0.045 and log-rank p = 0.03, respectively). In a proportional hazards model that included echocardiographic parameters, right ventricular contraction pressure index was an independent predictor for short-term mortality (odds ratio: 6.777, 95% confidence interval: 1.118–41.098, p = 0.037), but not for combined short-term mortality and definite right heart failure. No such associations were found for long-term mortality. Right ventricular contraction pressure index had a statistically significant correlation with invasively measured pulmonary capillary wedge pressure, pulmonary vascular resistance, mean pulmonary pressure, and right ventricular stroke work index. Conclusion: Right ventricular contraction pressure index was found as a useful parameter for determining short-term postoperative mortality in patients undergoing continuous-flow left ventricular assist device implantation.

Impact of scar on SPECT assay of left ventricular contraction dyssynchrony

2013 ◽  
Vol 41 (3) ◽  
pp. 529-535 ◽  
Author(s):  
Daniel R. Ludwig ◽  
Mati Friehling ◽  
Erik B. Schelbert ◽  
David Schwartzman
Keyword(s):  
Left Ventricular ◽  
Ventricular Contraction
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