Initial Holter Electrocardiogram Index to Predict the Burden of Subsequent Persistent Premature Ventricular Complex in Childhood.

Background: Asymptomatic premature ventricular complex (PVC) in childhood often disappears over time. However, predictive factors for persistent PVC are unknown. We examined predictive factors for persistent PVCs on initial Holter electrocardiogram (ECG) in pediatric patients with asymptomatic PVC.

A case of tachycardia-induced acute kidney injury by renal hypouricemia.

Unlabelled: Idiopathic renal hypouricemia is an autosomal recessive hereditary disease, characterized by hypouricemia and high renal fractional excretion of uric acid, and can be complicated by acute kidney injury after anaerobic exercise. However, no report has suggested tachycardia-induced acute kidney injury complicated with renal hypouricemia. We herein report the case of a 12-year-old female with tachycardia-induced acute kidney injury complicated with renal hypouricemia.

Effects of biventricular shunt on pump characteristics in a maglev total artificial heart.

Severe left ventricular failure can progress to right ventricular failure, necessitating alternatives to heart transplantation, such as total artificial heart (TAH) treatment. Conventional TAHs encounter challenges associated with miniaturization and hemocompatibility owing to their reliance on mechanical valves and bearings. A magnetically levitated TAH (IB-Heart) was developed, utilizing a magnetic bearing.

Dynamic motion analysis of impeller for the development of real-time flow rate estimations of a ventricular assist device.

Implantable ventricular assist devices are used in heart failure therapy. These devices require real-time flow rate estimation for effective mechanical circulatory support. We previously developed a flow rate estimation method using the eccentric position of a magnetically levitated impeller to achieve real-time estimation.

Effects of gravity on flow rate estimations of a centrifugal blood pump using the eccentric position of a levitated impeller.

Implantable ventricular assist devices are a type of mechanical circulatory support for assisting the pumping of the heart. Accurate estimation of the flow rate through such devices is critical to ensure effective performance. A novel method for estimating the flow rate using the passively stabilized position of a magnetically levitated impeller was developed by our group.