Left ventricular assist device is the device which helps assist the heart of the patients suffering with heart failure. It is a device which will allow the blood to flow through the heart as well as pumping the blood to all over the body, providing the oxygen for the organs and tissues to function. Since the first day that this left ventricular assist device has been introduced, it has massively improved including its design, material and how it is able to deal with life threatening risks that the patients may have. 

    This review paper will provide the comparisons between the left ventricular assist devices in different generations and types, which will help see more about the differences that have been made to the left ventricular assist device. Also, the explanation of how left ventricular assist devices work, the important risks that the medical community still faces nowadays, and the possibilities of future improvement of left ventricular assist devices.