scholarly journals Intra-aortic Balloon Pump—Current Status

2018 ◽  
Vol 02 (02) ◽  
pp. 071-078
Author(s):  
Muralidhar Kanchi ◽  
Arun Chandran NV
Keyword(s):  
Left Ventricle ◽  
Personal Experience ◽  
Pump Current ◽  
Left Ventricular ◽  
Health Concern ◽  
Current Status ◽  
Assist Device ◽  
Intra Aortic Balloon Pump ◽  
Diastolic Phase ◽  
Systolic Phase

AbstractCardiac failure is an ever-growing public health concern confronted by both developed and developing nations of the world. Intra-aortic balloon pump (IABP) is a circulatory assist device that is used to support a failing left ventricle. IABP is designed to augment myocardial perfusion by increasing coronary blood flow during diastolic phase of the cardiac cycle and unloading the left ventricle during systolic phase. Intraoperative IABP is extremely useful when facing difficulty to wean from cardiopulmonary bypass. Until the controversy is resolved, personal experience and decision of the physician and patient circumstances may form the basis for the IABP use in a clinical setting with acute left ventricular failure.

scholarly journals Primary Arterial Switch Operation for TGA/IVS and Regressed Left Ventricle: How and When to Use Left Ventricular Assist Device

2019 ◽  
Vol 11 (1) ◽  
pp. 97-100
Author(s):  
Dhananjay P. Malankar ◽  
Sachin Patil ◽  
Shivaji Mali ◽  
Shyam Dhake ◽  
Amit Mhatre ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Left Ventricular Assist Device ◽  
Ventricular Assist Device ◽  
Arterial Switch Operation ◽  
Left Ventricular ◽  
Assist Device ◽  
Ventricular Assist ◽  
Arterial Switch ◽  
Switch Operation ◽  
Left Ventricular Assist

Purpose: Numerous attempts have been made to extend the boundaries of arterial switch operation (ASO) in children presenting late with transposition of great arteries with intact ventricular septum (TGA/IVS) and regressed left ventricle (rLV). Many children tolerate the delayed ASO uneventfully, whereas others need mechanical circulatory support (MCS) to sustain the systemic circulation while the left ventricle undergoes retraining. Description: In this article, we describe six consecutive children with TGA/IVS and rLV who underwent primary ASO. Results: Three were managed medically, while three required MCS in the form of Centrimag left ventricular assist device (LVAD). All patients survived the operation and were discharged home in a stable condition. Conclusions: Primary ASO can be safely performed in children with TGA/IVS and rLV, provided the center has MCS options. Supporting the rLV with LVAD is feasible and can be achieved safely.

Fluid-Structure Interaction Simulation of Blood Flow Inside a Diseased Left Ventricle With Obstructive Hypertrophic Cardiomyopathy in Early Systole

2009 ◽  
Author(s):  
Ahmad Moghaddaszade-Kermani ◽  
Peter Oshkai ◽  
Afzal Suleman
Keyword(s):  
Blood Flow ◽  
Hypertrophic Cardiomyopathy ◽  
Left Ventricle ◽  
Fluid Structure Interaction ◽  
Left Ventricular Pressure ◽  
Left Ventricular ◽  
Ventricular Pressure ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Systolic Phase

Mitral-Septal contact has been proven to be the cause of obstruction in the left ventricle with hypertrophic cardiomyopathy (HC). This paper presents a study on the fluid mechanics of obstruction using two-way loosely coupled fluid-structure interaction (FSI) methodology. A parametric model for the geometry of the diseased left ventricular cavity, myocardium and mitral valve has been developed, using the dimensions extracted from magnetic resonance images. The three-element Windkessel model [1] was modified for HC and solved to introduce pressure boundary condition to the aortic aperture in the systolic phase. The FSI algorithm starts at the beginning of systolic phase by applying the left ventricular pressure to the internal surface of the myocardium to contract the muscle. The displacements of the myocardium and mitral leaflets were calculated using the nonlinear finite element hyperelastic model [2] and subsequently transferred to the fluid domain. The fluid mesh was moved accordingly and the Navier-Stokes equations were solved in the laminar regime with the new mesh using the finite volume method. In the next time step, the left ventricular pressure was increased to contract the muscle further and the same procedure was repeated for the fluid solution. The results show that blood flow jet applies a drag force to the mitral leaflets which in turn causes the leaflet to deform toward the septum thus creating a narrow passage and possible obstruction.

scholarly journals Transhepatic echocardiography: a novel approach for imaging in left ventricle assist device patients with difficult acoustic windows

2020 ◽  
Vol 21 (5) ◽  
pp. 491-497 ◽  
Author(s):  
Mihai Strachinaru ◽  
Daniel J Bowen ◽  
Alina Constatinescu ◽  
Olivier C Manintveld ◽  
Jasper J Brugts ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Significant Proportion ◽  
Left Ventricular ◽  
Assist Device ◽  
Novel Approach ◽  
Significant Difference ◽  
Inflow Cannula ◽  
Probe Orientation ◽  
And Function ◽  
Ventricle Assist Device

Abstract Aims A significant proportion of left ventricle assist device (LVAD) patients have very difficult transthoracic echocardiographic images. The aim of this study was to find an echocardiographic window which would provide better visualization of the heart in LVAD patients with limited acoustic windows. Methods and results Based on the anatomic relationships in LVAD patients, a right intercostal transhepatic approach was proposed. By using a computer simulator, we searched for the appropriate probe orientation. Further, 15 ambulatory LVAD patients (age 56 ± 15 years, 73% males) underwent two echocardiographic studies: one normal transthoracic echocardiography following the institutional protocol (Echo 1) and a second study which included the transhepatic approach (Echo 2). The two exams were performed by two different sonographers and the results validated by a third observer for agreement. The transhepatic intercostal window was feasible in all patients, with an image quality allowing good visualization of structures in 93%. Precise quantification of the left ventricular (LV) and right ventricular (RV) function was achieved more often in the Echo 2 (10 vs. 3 patients for LV, P = 0.03 and 14 vs. 8 patients for RV, P = 0.04). A significant difference existed also in the quantification of the LVAD inflow cannula flow by pulsed Doppler (11 patients in Echo 2 vs. 3 patients in Echo 1, P = 0.009). Conclusion This is the first study describing a new echocardiographic window in LVAD patients. The transhepatic window may provide better quantification of left and RV dimensions and function and improvement in Doppler interrogation of the inflow cannula.

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