4 results about "Ventricular stimulation" patented technology

The invention discloses a simulation method and system for optimizing heart turn-back induction based on an infarction region distance, and belongs to the field of heart modeling simulation. A personalized high-fidelity ventricle model is constructed based on a CMRLGE image of an arrhythmia patient, each model is divided into regions, pacing points are randomly selected to induce VT, and induction states such as unstable turn-back, stable turn-back and non-persistent turn-back are obtained. Extracting a left ventricular grid model, calibrating a left ventricular myocardial infarction area and a boundary, and measuring a left ventricular stimulation point-infarction area distance for a pace-making point; and carrying out normality test and significance analysis on the distance data of all patients in the induction state, and if significance is met, optimizing the position of the pace-making point, namely summarizing the distance data in the stable turn-back state, and determining the distance range of easily inducing turn-back. The simulation method disclosed by the invention is easy to induce a turn-back similar to a clinical real situation, and can effectively guide a clinician to accurately find an optimal ablation target spot during a VT ablation operation.

The invention relates to an implantable medical device for stimulating a human or animal heart. The implantable medical device comprises at least one electrode (20, 21) that comprises a distal dipole (203) and is designed and arranged to be implanted within the septum (13) of the heart (1) to be stimulated. During operation, the implantable medical device performs the following steps: a) detecting, with the at least one electrode (20, 21), at least one of an intrinsic atrial signal and an intrinsic ventricular signal, or stimulating, with the at least one electrode (20, 21), the atrium (2) of the heart (1) to be stimulated; b) triggering a stimulation of the ventricle (5) of the heart (1) to be stimulated upon i) detecting the intrinsic atrial signal, ii) stimulating the atrium (2), or iii) detecting the intrinsic ventricular signal, wherein triggering upon i) detecting the intrinsic atrial signal or ii) stimulating the atrium (2) is carried out only with a predeterminable temporal delay, and triggering upon iii) detecting the intrinsic ventricular signal is carried out without temporal delay but only if a predeterminable first time period has passed since a preceding ventricular signal, the first time period representing an allowable minimum ventricular interval.

The invention relates to an implantable medical device for stimulating a human or animal heart, the device comprising a single electrode (20) comprising a proximal electrode pole (213) designed and arranged to be implanted within an atrium (2) of the heart (1) to be stimulated and a distal electrode pole (203) designed and arranged to be implanted within a septum (13) of the heart (1) to be stimulated. During operation, the implantable medical device performs the following steps: a) detecting (500) an intrinsic atrial contraction of the heart (1) to be stimulated with the proximal electrode pole (213) or stimulating (500) the atrium (2) of the heart (1) to be stimulated with the proximal electrode pole (213); b) detecting (530) an intrinsic ventricular contraction of the heart (1) to be stimulated with the distal electrode pole (203); c) determining (530) an intrinsic atrioventricular conduction time between i) the intrinsic atrial contraction or the stimulation of the atrium and ii) the intrinsic ventricular contraction; d) setting (550) a stimulated atrioventricular conduction time for stimulating a ventricle (3, 5) of the heart (1) to be stimulated with the distal electrode pole (203), the stimulated atrioventricular conduction time being shorter than the intrinsic atrioventricular conduction time.