Medical devices to reduce and diagnose unnecessary cardiac pacing

Abstract

The invention provides a medical device for reducing and diagnosing unnecessary cardiac pacing. The medical device comprises a microprocessor and a digital / analog module connected to the microprocessor; a main control unit receives a sensing event when a sensing control / amplification unit is beyond a refractory period, or the main control unit measures an interval between the sensing event / a pacing signal and a last sensing event / a pacing signal after the main control unit transmits the pacing signal to a pacing control / generation unit, and a heart rate is obtained through multiple intervals; the main control unit determines a low limit frequency of the medical device according to the heart rate, and sets a pacing frequency of the medical device. The device pacing frequency set by the medical device updates with the change of the heart rate of a patient. The medical device of the invention is applied to a double-chamber-mode atrium low limit frequency and a single-chamber-mode ventricle low limit frequency, can effectively reduce unnecessary atrium / ventricle pacing to realize physiological pacing, can eliminate ventricle long intermittence during atrial fibrillation (AF), and relatively regulates a ventricular rate and reduces possible symptoms of the patient.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a medical device for reducing and diagnosing unnecessary cardiac pacing. Background technique [0002] At present, in dual-chamber pacemakers, prolonging SAV and / or PAV generally promotes self-conduction and reduces ventricular pacing. However, in the AV search algorithm, SAV / PAV prolongation is limited, and some unnecessary ventricular pacing can still be seen. Another way to promote self-conduction is to switch the pacing mode to AAI(R) pacing mode with the backup support of DDD(R) pacing mode when self-AV conduction is found. There is a problem with this mode: when using AAI mode During operation, if complete AV block occurs, there will be at least two beats of ventricular arrest due to the absence of ventricular pacing, and some patients will experience an uncomfortable feeling of arrest. On the other hand, how to reduce ventricular pacing in single-chamber pacemaker...

AI Technical Summary

Problems solved by technology

[0002] At present, in dual-chamber pacemakers, SAV and / or PAV are generally extended to promote self-conduction and reduce ventricular pacing, but the SAV / PAV extension in the AV search algorithm is limited, and some unnecessary ventricular pacing can still be seen

Another way to promote self-conduction is to switch the pacing mode to AAI(R) pacing mode with the backup support of DDD(R) pacing mode when self-AV conduction is found. There is a problem with this mode: when using AAI mode During operation, if complete AV block occurs, there will be at least two beats of ventricular arrest due to the absence of ventricular pacing, some patients will experience an uncomfortable feeling of arrest

In the existing AV interval search function, the sleep frequency and frequency lag need to be artificially controlled at a lower frequency, so the frequency is fixed and cannot be automatically adjusted according to the change of the heart rate, resulting in increased atrial and ventricular pacing

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