47 results about "Ventricular tachyarrhythmia" patented technology

An apparatus and method for treating post-defibrillation electromechanical dissociation ("EMD"). A first embodiment comprises an implantable defibrillator, which may include cardioversion and pacemaker capabilities, which has the capability of detecting and treating post defibrillation EMD. The stimulator / defibrillator has one or more leads with electrodes. At least one electrode for defibrillation may be an endocardial or epicardial electrode or other suitable defibrillation electrode. A sense circuit senses the electrical condition of the heart of the patient. A hemodynamic sensor senses a parameter correlated to the state of blood flow. The cardiac stimulator / defibrillator detects ventricular tachyarrhythmia including fibrillation and terminates ventricular tachyarrhythmia. After termination of the ventricular tachyarrhythmia, the stimulator / defibrillator can detect the presence of electrical rhythm in the heart correlated, however, with inadequate blood flow to sustain life. Under such conditions, the device provides an output to stimulate the heart to overcome electromechanical dissociation and restore adequate blood flow. The device may also be an external therapy device, as part of, or in conjunction with an external defibrillator. The method for treating the heart to restore blood flow where electromechanical dissociation occurs after termination of a ventricular tachyarrhythmia or ventricular fibrillation comprises identifying electromechanical disassociation after termination of a ventricular tachyarrhythmia or a fibrillation and providing electrical therapy, the therapy comprising a series of packets of electrical pulses.

The disclosure describes techniques for delivering electrical stimulation to decrease the ventricular rate response during an atrial tachyarrhythmia, such as atrial fibrillation. AV nodal stimulation is employed during an atrial tachyarrhythmia episode with rapid ventricular conduction to distinguish ventricular tachyarrhythmia from supraventricular tachycardia and thereby prevent delivering inappropriate therapy to a patient.

A device for classifying of supraventricular tachyarrhythmia (SVT) from ventricular tachyarrhythmia (VT) comprising means for providing a template signal and a test signal originated from an electrogram, the template signal and the test signal comprising samples, means for transforming at least the test signal resulting in a representation of the test signal where the sample values of the signal take integers, means for determining a correlation between the template signal and the test signal and means for classifying of SVT from ventricular VT based on the correlation.

Provided herein are methods that include (i) determining a level of soluble ST2 in a biological sample from a subject, (i) comparing the level of soluble ST2 in the biological sample to a reference level of soluble ST2 (e.g., a level of soluble ST2 in the subject at an earlier time point), and (iii) selecting, implanting, replacing, or reprogramming an implanted cardiac device, e.g., an ICD, CRT, or CRT-D device, for a subject having an elevated level of soluble ST2 in the biological sample compared to the reference level of soluble ST2, or selecting a subject for participation in, or stratifying a subject participating in, a clinical study of a treatment for reducing the risk of a ventricular tachyarrhythmia (VTA) event. Also provided are methods for evaluating the risk of a VTA event in a subject. Also provided are kits for performing any of these methods.