Novel Left Ventricular Assist System: an electrocardiogram-synchronized LVAS that avoids cardiac cannulation. 2003

Domingo Liotta
Service of Cardiovascular Surgery, Dupuytren Institute-Quilmes Trinity Cardiovascular Center, Av. Belgrano 3402, Buenos Aires (C 1210 AAP), Argentina. medicina@unimoron.edu.ar

We propose a Novel Left Ventricular Assist System (Novel LVAS) as a bridge to cardiac transplantation and to functional heart recovery in advanced heart failure. This report regards the principles that led to its development. It is our hope that the design of a high-peak-output pump of smaller size will lead to improved functional capacity, when compared with currently available left ventricular assist bridges to heart recovery. Several basic considerations went into the design of this system: 1) we did not want to cannulate the heart chambers; 2) in particular, we rejected the use of a left ventricular apical cannula for myocardial recovery, because it destroys the helical anatomy of the chamber; 3) we chose an atriostomy for blood inflow to the implanted pump; and 4) we synchronized the pump to the patient's electrocardiogram, to ensure blood pump ejection in diastole. The key to success is the atriostomy, which creates an opening larger than the patient's mitral valve. The atriostomy may be performed with the heart beating. Bleeding from the left ventricular apical anastomosis is a fairly common occurrence in currently available left ventricular assist systems; subsequent transfusion can exacerbate right heart dysfunction and sensitize the immune system. These complications are avoided with our system. The new system works either in partial mode or total mode, depending on whether partial or full left ventricular unloading is required. The Novel Left Ventricular Assist System is in its initial clinical trial stage, under the supervision of the author.

UI MeSH Term Description Entries
D004867 Equipment Design Methods and patterns of fabricating machines and related hardware. Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D006333 Heart Failure A heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. Heart failure can be caused by structural defects, functional abnormalities (VENTRICULAR DYSFUNCTION), or a sudden overload beyond its capacity. Chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as MYOCARDIAL INFARCTION. Cardiac Failure,Heart Decompensation,Congestive Heart Failure,Heart Failure, Congestive,Heart Failure, Left-Sided,Heart Failure, Right-Sided,Left-Sided Heart Failure,Myocardial Failure,Right-Sided Heart Failure,Decompensation, Heart,Heart Failure, Left Sided,Heart Failure, Right Sided,Left Sided Heart Failure,Right Sided Heart Failure
D006353 Heart-Assist Devices Small pumps, often implantable, designed for temporarily assisting the heart, usually the LEFT VENTRICLE, to pump blood. They consist of a pumping chamber and a power source, which may be partially or totally external to the body and activated by electromagnetic motors. Artificial Ventricle,Heart Assist Device,Heart Ventricle, Artificial,Pumps, Heart-Assist,Vascular-Assist Device,Vascular-Assist Devices,Ventricle-Assist Device,Ventricular Assist Device,Artificial Heart Ventricle,Artificial Heart Ventricles,Artificial Ventricles,Assist Device, Heart,Assist Device, Ventricular,Assist Devices, Heart,Assist Devices, Ventricular,Device, Heart Assist,Device, Heart-Assist,Device, Vascular-Assist,Device, Ventricle-Assist,Device, Ventricular Assist,Devices, Heart Assist,Devices, Heart-Assist,Devices, Vascular-Assist,Devices, Ventricle-Assist,Devices, Ventricular Assist,Heart Assist Devices,Heart Ventricles, Artificial,Heart-Assist Device,Heart-Assist Pump,Heart-Assist Pumps,Pump, Heart-Assist,Pumps, Heart Assist,Vascular Assist Device,Vascular Assist Devices,Ventricle Assist Device,Ventricle, Artificial,Ventricle, Artificial Heart,Ventricle-Assist Devices,Ventricles, Artificial,Ventricles, Artificial Heart,Ventricular Assist Devices
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D015716 Electrocardiography, Ambulatory Method in which prolonged electrocardiographic recordings are made on a portable tape recorder (Holter-type system) or solid-state device ("real-time" system), while the patient undergoes normal daily activities. It is useful in the diagnosis and management of intermittent cardiac arrhythmias and transient myocardial ischemia. Ambulatory Electrocardiography,Electrocardiography, Dynamic,Electrocardiography, Holter,Holter ECG,Holter EKG,Holter Monitoring,Monitoring, Ambulatory Electrocardiographic,Monitoring, Holter,Ambulatory Electrocardiography Monitoring,Dynamic Electrocardiography,Electrocardiography Monitoring, Ambulatory,Holter Electrocardiography,Ambulatory Electrocardiographic Monitoring,ECG, Holter,ECGs, Holter,EKG, Holter,EKGs, Holter,Electrocardiographic Monitoring, Ambulatory,Holter ECGs,Holter EKGs,Monitoring, Ambulatory Electrocardiography
D018487 Ventricular Dysfunction, Left A condition in which the LEFT VENTRICLE of the heart was functionally impaired. This condition usually leads to HEART FAILURE; MYOCARDIAL INFARCTION; and other cardiovascular complications. Diagnosis is made by measuring the diminished ejection fraction and a depressed level of motility of the left ventricular wall. LV Diastolic Dysfunction,LV Dysfunction,LV Systolic Dysfunction,Left Ventricular Diastolic Dysfunction,Left Ventricular Dysfunction,Left Ventricular Systolic Dysfunction,Diastolic Dysfunction, LV,Dysfunction, LV,Dysfunction, LV Diastolic,Dysfunction, LV Systolic,Dysfunction, Left Ventricular,LV Diastolic Dysfunctions,LV Dysfunctions,LV Systolic Dysfunctions,Left Ventricular Dysfunctions,Systolic Dysfunction, LV

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